Extracting prog: 1m32.955351632s
Minimizing prog: 44m57.148964622s
Simplifying prog options: 5m6.962056357s
Extracting C: 54.366139374s
Simplifying C: 0s


extracting reproducer from 54 programs
first checking the prog from the crash report
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-writev-fsopen-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_CREATE_BUFS-ioctl$VIDIOC_QBUF-sendmsg$NL80211_CMD_TRIGGER_SCAN-syz_open_dev$dvb_frontend-bpf$BPF_BTF_LOAD-bpf$PROG_LOAD
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
fsopen(&(0x7f00000001c0)='ramfs\x00', 0x0)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_CREATE_BUFS(r1, 0xc100565c, &(0x7f00000013c0)={0x0, 0x2, 0x2, {0x5, @vbi={0x0, 0x0, 0x4, 0x0, [], [0x8200], 0x1}}})
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
sendmsg$NL80211_CMD_TRIGGER_SCAN(0xffffffffffffffff, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000300)={&(0x7f0000000100)={0x24, 0x0, 0x5, 0x0, 0x0, {{}, {@val={0x8}, @void}}, [@NL80211_ATTR_IE={0x4}, @NL80211_ATTR_SCAN_SSIDS={0x4}]}, 0x24}}, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)
bpf$BPF_BTF_LOAD(0x12, &(0x7f00000003c0)={&(0x7f0000000000)=ANY=[@ANYBLOB="9feb01001800000000000000"], 0x0, 0x26}, 0x28)
bpf$PROG_LOAD(0x5, 0x0, 0x0)

program crashed: KASAN: use-after-free Read in dvb_device_open
single: successfully extracted reproducer
found reproducer with 18 syscalls
minimizing guilty program
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-writev-fsopen-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_CREATE_BUFS-ioctl$VIDIOC_QBUF-sendmsg$NL80211_CMD_TRIGGER_SCAN-syz_open_dev$dvb_frontend-bpf$BPF_BTF_LOAD
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
fsopen(&(0x7f00000001c0)='ramfs\x00', 0x0)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_CREATE_BUFS(r1, 0xc100565c, &(0x7f00000013c0)={0x0, 0x2, 0x2, {0x5, @vbi={0x0, 0x0, 0x4, 0x0, [], [0x8200], 0x1}}})
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
sendmsg$NL80211_CMD_TRIGGER_SCAN(0xffffffffffffffff, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000300)={&(0x7f0000000100)={0x24, 0x0, 0x5, 0x0, 0x0, {{}, {@val={0x8}, @void}}, [@NL80211_ATTR_IE={0x4}, @NL80211_ATTR_SCAN_SSIDS={0x4}]}, 0x24}}, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)
bpf$BPF_BTF_LOAD(0x12, &(0x7f00000003c0)={&(0x7f0000000000)=ANY=[@ANYBLOB="9feb01001800000000000000"], 0x0, 0x26}, 0x28)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-writev-fsopen-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_CREATE_BUFS-ioctl$VIDIOC_QBUF-sendmsg$NL80211_CMD_TRIGGER_SCAN-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
fsopen(&(0x7f00000001c0)='ramfs\x00', 0x0)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_CREATE_BUFS(r1, 0xc100565c, &(0x7f00000013c0)={0x0, 0x2, 0x2, {0x5, @vbi={0x0, 0x0, 0x4, 0x0, [], [0x8200], 0x1}}})
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
sendmsg$NL80211_CMD_TRIGGER_SCAN(0xffffffffffffffff, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000300)={&(0x7f0000000100)={0x24, 0x0, 0x5, 0x0, 0x0, {{}, {@val={0x8}, @void}}, [@NL80211_ATTR_IE={0x4}, @NL80211_ATTR_SCAN_SSIDS={0x4}]}, 0x24}}, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-writev-fsopen-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_CREATE_BUFS-ioctl$VIDIOC_QBUF-sendmsg$NL80211_CMD_TRIGGER_SCAN
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
fsopen(&(0x7f00000001c0)='ramfs\x00', 0x0)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_CREATE_BUFS(r1, 0xc100565c, &(0x7f00000013c0)={0x0, 0x2, 0x2, {0x5, @vbi={0x0, 0x0, 0x4, 0x0, [], [0x8200], 0x1}}})
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
sendmsg$NL80211_CMD_TRIGGER_SCAN(0xffffffffffffffff, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000300)={&(0x7f0000000100)={0x24, 0x0, 0x5, 0x0, 0x0, {{}, {@val={0x8}, @void}}, [@NL80211_ATTR_IE={0x4}, @NL80211_ATTR_SCAN_SSIDS={0x4}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-writev-fsopen-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_CREATE_BUFS-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
fsopen(&(0x7f00000001c0)='ramfs\x00', 0x0)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_CREATE_BUFS(r1, 0xc100565c, &(0x7f00000013c0)={0x0, 0x2, 0x2, {0x5, @vbi={0x0, 0x0, 0x4, 0x0, [], [0x8200], 0x1}}})
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-writev-fsopen-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_CREATE_BUFS-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
fsopen(&(0x7f00000001c0)='ramfs\x00', 0x0)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_CREATE_BUFS(r1, 0xc100565c, &(0x7f00000013c0)={0x0, 0x2, 0x2, {0x5, @vbi={0x0, 0x0, 0x4, 0x0, [], [0x8200], 0x1}}})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-writev-fsopen-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
fsopen(&(0x7f00000001c0)='ramfs\x00', 0x0)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-writev-fsopen-ioctl$sock_SIOCGIFINDEX_80211-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
fsopen(&(0x7f00000001c0)='ramfs\x00', 0x0)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
ioctl$VIDIOC_QBUF(0xffffffffffffffff, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-writev-fsopen-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
fsopen(&(0x7f00000001c0)='ramfs\x00', 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-syz_open_dev$sndmidi-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r0 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r0, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-openat$sequencer-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
writev(0xffffffffffffffff, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r0 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r0, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-prlimit64-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-prctl$PR_SCHED_CORE-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_CREATE_ID-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_CREATE_ID(0xffffffffffffffff, &(0x7f00000002c0)={0x0, 0x18, 0xfa00, {0x0, 0x0, 0x106, 0x4}}, 0x20)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$AUTOFS_IOC_EXPIRE_MULTI-write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
ioctl$AUTOFS_IOC_EXPIRE_MULTI(0xffffffffffffffff, 0x40049366, 0x0)
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, 0x0, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, 0x0, 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(0x0, 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, 0x0, 0x0)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{0x0}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(&(0x7f0000000000), 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(0x0, 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, &(0x7f0000000200)=@fd={0x0, 0x5, 0x4, 0x0, 0x3, {}, {0x0, 0x0, 0x0, 0x0, 0x0, 0xfe, "8000"}, 0x0, 0x2, {}, 0x20800})
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(0x0, 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(0x0, 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, 0x0)
syz_open_dev$dvb_frontend(0x0, 0x0, 0x2)

program did not crash
extracting C reproducer
testing compiled C program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
program did not crash
simplifying guilty program options
testing program (duration=45.637641184s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(0x0, 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(0x0, 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(0x0, 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program did not crash
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(0x0, 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Write in dvb_device_open
validation run: crashed=true
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(0x0, 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_device_open
validation run: crashed=true
testing program (duration=45.637641184s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$RDMA_USER_CM_CMD_BIND-openat$sequencer-syz_open_dev$sndmidi-writev-ioctl$sock_SIOCGIFINDEX_80211-syz_open_dev$vbi-ioctl$VIDIOC_QBUF-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
write$RDMA_USER_CM_CMD_BIND(0xffffffffffffffff, &(0x7f0000000d40)={0x14, 0x88, 0xfa00, {0xffffffffffffffff, 0x30, 0x0, @ib={0x1b, 0x7a, 0x889, {}, 0x1119dff, 0xffffffff80000002, 0xcd41}}}, 0xfffffd74)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x0, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x141102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$sock_SIOCGIFINDEX_80211(0xffffffffffffffff, 0x8933, 0x0)
r1 = syz_open_dev$vbi(0x0, 0x1, 0x2)
ioctl$VIDIOC_QBUF(r1, 0xc058565d, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000080), 0x0, 0x2)

program crashed: KASAN: use-after-free Read in dvb_frontend_release
validation run: crashed=true
reproducing took 56m45.222929701s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in dvb_frontend_release+0x3f5/0x490 drivers/media/dvb-core/dvb_frontend.c:2900
Read of size 4 at addr ffff888028cd943c by task syz.2.43/4566

CPU: 0 PID: 4566 Comm: syz.2.43 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0xa8/0x210 mm/kasan/report.c:420
 kasan_report+0x10b/0x140 mm/kasan/report.c:524
 dvb_frontend_release+0x3f5/0x490 drivers/media/dvb-core/dvb_frontend.c:2900
 __fput+0x20a/0x8b0 fs/file_table.c:320
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff847b9de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffec8e5f108 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ff847e27da0 RCX: 00007ff847b9de59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007ff847e27da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007ff847e27cb0 R11: 0000000000000246 R12: 000000000001d93f
R13: 00007ff847e2609c R14: 000000000001d6be R15: 00007ffec8e5f210
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:384
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 dvb_register_device+0x305/0x1dc0 drivers/media/dvb-core/dvbdev.c:478
 dvb_register_frontend+0x629/0x900 drivers/media/dvb-core/dvb_frontend.c:3035
 vidtv_bridge_dvb_init drivers/media/test-drivers/vidtv/vidtv_bridge.c:438 [inline]
 vidtv_bridge_probe+0x9cf/0xf50 drivers/media/test-drivers/vidtv/vidtv_bridge.c:510
 platform_probe+0x137/0x1c0 drivers/base/platform.c:1400
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x24a/0xb40 drivers/base/dd.c:639
 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:805
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:835
 __driver_attach+0x43d/0x6c0 drivers/base/dd.c:1221
 bus_for_each_dev+0x182/0x1f0 drivers/base/bus.c:303
 bus_add_driver+0x324/0x5d0 drivers/base/bus.c:620
 driver_register+0x32d/0x430 drivers/base/driver.c:246
 vidtv_bridge_init+0x39/0x67 drivers/media/test-drivers/vidtv/vidtv_bridge.c:602
 do_one_initcall+0x257/0x800 init/main.c:1309
 do_initcall_level+0x13d/0x1ed init/main.c:1382
 do_initcalls+0x4b/0x8a init/main.c:1398
 kernel_init_freeable+0x401/0x5ab init/main.c:1637
 kernel_init+0x19/0x1b0 init/main.c:1525
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Freed by task 4566:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1729 [inline]
 slab_free_freelist_hook+0x133/0x1b0 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 __kmem_cache_free+0xb6/0x200 mm/slub.c:3700
 dvb_free_device drivers/media/dvb-core/dvbdev.c:625 [inline]
 kref_put include/linux/kref.h:65 [inline]
 dvb_device_put drivers/media/dvb-core/dvbdev.c:640 [inline]
 dvb_generic_release+0x11c/0x1b0 drivers/media/dvb-core/dvbdev.c:173
 dvb_frontend_release+0x131/0x490 drivers/media/dvb-core/dvb_frontend.c:2898
 __fput+0x20a/0x8b0 fs/file_table.c:320
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888028cd9400
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 60 bytes inside of
 256-byte region [ffff888028cd9400, ffff888028cd9500)

The buggy address belongs to the physical page:
page:ffffea0000a33600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x28cd8
head:ffffea0000a33600 order:1 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888017441b40
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 15107205446, free_ts 0
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560
 prep_new_page mm/page_alloc.c:2567 [inline]
 get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358
 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658
 alloc_page_interleave+0x24/0x1e0 mm/mempolicy.c:2115
 alloc_slab_page+0x5d/0x180 mm/slub.c:1799
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x87/0x2d0 mm/slub.c:1997
 ___slab_alloc+0xbc5/0x1240 mm/slub.c:3154
 __slab_alloc mm/slub.c:3240 [inline]
 slab_alloc_node mm/slub.c:3325 [inline]
 __kmem_cache_alloc_node+0x126/0x270 mm/slub.c:3398
 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1026
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 bus_add_driver+0xdc/0x5d0 drivers/base/bus.c:604
 driver_register+0x32d/0x430 drivers/base/driver.c:246
 usb_register_driver+0x201/0x3c0 drivers/usb/core/driver.c:1062
 do_one_initcall+0x257/0x800 init/main.c:1309
 do_initcall_level+0x13d/0x1ed init/main.c:1382
 do_initcalls+0x4b/0x8a init/main.c:1398
 kernel_init_freeable+0x401/0x5ab init/main.c:1637
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888028cd9300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888028cd9380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888028cd9400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888028cd9480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888028cd9500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in dvb_frontend_release+0x3f5/0x490 drivers/media/dvb-core/dvb_frontend.c:2900
Read of size 4 at addr ffff888028cd943c by task syz.2.43/4566

CPU: 0 PID: 4566 Comm: syz.2.43 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0xa8/0x210 mm/kasan/report.c:420
 kasan_report+0x10b/0x140 mm/kasan/report.c:524
 dvb_frontend_release+0x3f5/0x490 drivers/media/dvb-core/dvb_frontend.c:2900
 __fput+0x20a/0x8b0 fs/file_table.c:320
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff847b9de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffec8e5f108 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ff847e27da0 RCX: 00007ff847b9de59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007ff847e27da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007ff847e27cb0 R11: 0000000000000246 R12: 000000000001d93f
R13: 00007ff847e2609c R14: 000000000001d6be R15: 00007ffec8e5f210
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:384
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 dvb_register_device+0x305/0x1dc0 drivers/media/dvb-core/dvbdev.c:478
 dvb_register_frontend+0x629/0x900 drivers/media/dvb-core/dvb_frontend.c:3035
 vidtv_bridge_dvb_init drivers/media/test-drivers/vidtv/vidtv_bridge.c:438 [inline]
 vidtv_bridge_probe+0x9cf/0xf50 drivers/media/test-drivers/vidtv/vidtv_bridge.c:510
 platform_probe+0x137/0x1c0 drivers/base/platform.c:1400
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x24a/0xb40 drivers/base/dd.c:639
 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:805
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:835
 __driver_attach+0x43d/0x6c0 drivers/base/dd.c:1221
 bus_for_each_dev+0x182/0x1f0 drivers/base/bus.c:303
 bus_add_driver+0x324/0x5d0 drivers/base/bus.c:620
 driver_register+0x32d/0x430 drivers/base/driver.c:246
 vidtv_bridge_init+0x39/0x67 drivers/media/test-drivers/vidtv/vidtv_bridge.c:602
 do_one_initcall+0x257/0x800 init/main.c:1309
 do_initcall_level+0x13d/0x1ed init/main.c:1382
 do_initcalls+0x4b/0x8a init/main.c:1398
 kernel_init_freeable+0x401/0x5ab init/main.c:1637
 kernel_init+0x19/0x1b0 init/main.c:1525
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Freed by task 4566:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1729 [inline]
 slab_free_freelist_hook+0x133/0x1b0 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 __kmem_cache_free+0xb6/0x200 mm/slub.c:3700
 dvb_free_device drivers/media/dvb-core/dvbdev.c:625 [inline]
 kref_put include/linux/kref.h:65 [inline]
 dvb_device_put drivers/media/dvb-core/dvbdev.c:640 [inline]
 dvb_generic_release+0x11c/0x1b0 drivers/media/dvb-core/dvbdev.c:173
 dvb_frontend_release+0x131/0x490 drivers/media/dvb-core/dvb_frontend.c:2898
 __fput+0x20a/0x8b0 fs/file_table.c:320
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888028cd9400
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 60 bytes inside of
 256-byte region [ffff888028cd9400, ffff888028cd9500)

The buggy address belongs to the physical page:
page:ffffea0000a33600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x28cd8
head:ffffea0000a33600 order:1 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888017441b40
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 15107205446, free_ts 0
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2560
 prep_new_page mm/page_alloc.c:2567 [inline]
 get_page_from_freelist+0x206b/0x2180 mm/page_alloc.c:4358
 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5658
 alloc_page_interleave+0x24/0x1e0 mm/mempolicy.c:2115
 alloc_slab_page+0x5d/0x180 mm/slub.c:1799
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x87/0x2d0 mm/slub.c:1997
 ___slab_alloc+0xbc5/0x1240 mm/slub.c:3154
 __slab_alloc mm/slub.c:3240 [inline]
 slab_alloc_node mm/slub.c:3325 [inline]
 __kmem_cache_alloc_node+0x126/0x270 mm/slub.c:3398
 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1026
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 bus_add_driver+0xdc/0x5d0 drivers/base/bus.c:604
 driver_register+0x32d/0x430 drivers/base/driver.c:246
 usb_register_driver+0x201/0x3c0 drivers/usb/core/driver.c:1062
 do_one_initcall+0x257/0x800 init/main.c:1309
 do_initcall_level+0x13d/0x1ed init/main.c:1382
 do_initcalls+0x4b/0x8a init/main.c:1398
 kernel_init_freeable+0x401/0x5ab init/main.c:1637
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888028cd9300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888028cd9380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888028cd9400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888028cd9480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888028cd9500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================