Extracting prog: 37.528415941s
Minimizing prog: 44m52.41913994s
Simplifying prog options: 3m36.488203494s
Extracting C: 1m11.424567003s
Simplifying C: 0s


extracting reproducer from 71 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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-syz_open_dev$vim2m-splice-syz_init_net_socket$bt_hci-bind$bt_hci-write-syz_open_dev$dvb_frontend-syz_open_dev$media-syz_open_dev$usbmon-pselect6
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
syz_open_dev$vim2m(0x0, 0x403, 0x2)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x38f9, 0x0)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
write(r1, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$media(&(0x7f0000000000), 0x7a, 0x181840)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)
pselect6(0x40, &(0x7f0000000240)={0x0, 0xa000000, 0x1ff, 0x7d, 0xfffffffffffffffc, 0x8000, 0x2, 0x4}, 0x0, &(0x7f00000002c0)={0x3ff, 0x7fff, 0xffffffffffffffff, 0x9, 0x0, 0x9}, 0x0, 0x0)

program crashed: KASAN: use-after-free Read in dvb_device_open
single: successfully extracted reproducer
found reproducer with 15 syscalls
minimizing guilty program
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-syz_open_dev$vim2m-splice-syz_init_net_socket$bt_hci-bind$bt_hci-write-syz_open_dev$dvb_frontend-syz_open_dev$media-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
syz_open_dev$vim2m(0x0, 0x403, 0x2)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x38f9, 0x0)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
write(r1, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$media(&(0x7f0000000000), 0x7a, 0x181840)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-syz_open_dev$vim2m-splice-syz_init_net_socket$bt_hci-bind$bt_hci-write-syz_open_dev$dvb_frontend-syz_open_dev$media
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
syz_open_dev$vim2m(0x0, 0x403, 0x2)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x38f9, 0x0)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
write(r1, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$media(&(0x7f0000000000), 0x7a, 0x181840)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-syz_open_dev$vim2m-splice-syz_init_net_socket$bt_hci-bind$bt_hci-write-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
syz_open_dev$vim2m(0x0, 0x403, 0x2)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x38f9, 0x0)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
write(r1, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-syz_open_dev$vim2m-splice-syz_init_net_socket$bt_hci-bind$bt_hci-write-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
syz_open_dev$vim2m(0x0, 0x403, 0x2)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x38f9, 0x0)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
write(r1, 0x0, 0x0)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-syz_open_dev$vim2m-splice-syz_init_net_socket$bt_hci-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
syz_open_dev$vim2m(0x0, 0x403, 0x2)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x38f9, 0x0)
r1 = syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
bind$bt_hci(r1, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-syz_open_dev$vim2m-splice-syz_init_net_socket$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
syz_open_dev$vim2m(0x0, 0x403, 0x2)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x38f9, 0x0)
syz_init_net_socket$bt_hci(0x1f, 0x3, 0x1)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-syz_open_dev$vim2m-splice-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
syz_open_dev$vim2m(0x0, 0x403, 0x2)
splice(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x38f9, 0x0)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-syz_open_dev$vim2m-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
syz_open_dev$vim2m(0x0, 0x403, 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
writev(0xffffffffffffffff, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-prlimit64-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prctl$PR_SCHED_CORE-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.191000758s, {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}}): prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, 0x0, 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(0x0, 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, 0x0, 0x0)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{0x0}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, &(0x7f0000000080)={0x1f, 0xffff, 0x3}, 0x6)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, 0x0, 0x0)
syz_open_dev$dvb_frontend(0x0, 0x0, 0x40002)
syz_open_dev$usbmon(&(0x7f0000000080), 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(0x0, 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
extracting C reproducer
testing compiled C program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
program did not crash
simplifying guilty program options
testing program (duration=45.191000758s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(0x0, 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(0x0, 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(0x0, 0x8002, 0xa2000)

program did not crash
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(0x0, 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
validation run: crashed=true
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(0x0, 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
validation run: crashed=true
testing program (duration=45.191000758s, {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}}): openat$sequencer2-prlimit64-sched_setscheduler-syz_open_dev$sndmidi-writev-bind$bt_hci-syz_open_dev$dvb_frontend-syz_open_dev$usbmon
detailed listing:
executing program 0:
openat$sequencer2(0xffffffffffffff9c, &(0x7f0000000080), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000000)=0x7)
r0 = syz_open_dev$sndmidi(&(0x7f0000000040), 0x2, 0x4a102)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
bind$bt_hci(0xffffffffffffffff, 0x0, 0x0)
syz_open_dev$dvb_frontend(&(0x7f0000000000), 0x0, 0x40002)
syz_open_dev$usbmon(0x0, 0x8002, 0xa2000)

program crashed: KASAN: use-after-free Read in dvb_device_open
validation run: crashed=true
reproducing took 53m42.674988958s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: use-after-free in dvb_device_open+0xc6/0x370 drivers/media/dvb-core/dvbdev.c:109
Read of size 8 at addr ffff88814b60d818 by task syz.3.26/4391

CPU: 0 PID: 4391 Comm: syz.3.26 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 dvb_device_open+0xc6/0x370 drivers/media/dvb-core/dvbdev.c:109
 chrdev_open+0x5c5/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x7ff/0xf80 fs/open.c:826
 do_open fs/namei.c:3616 [inline]
 path_openat+0x26f5/0x2fa0 fs/namei.c:3750
 do_filp_open+0x1e2/0x410 fs/namei.c:3777
 do_sys_openat2+0x150/0x4b0 fs/open.c:1255
 do_sys_open fs/open.c:1271 [inline]
 __do_sys_openat fs/open.c:1287 [inline]
 __se_sys_openat fs/open.c:1282 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1282
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f793135d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f79309dcb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f79309dd6c0 RCX: 00007f793135d68e
RDX: 0000000000040002 RSI: 00007f79309dcc00 RDI: ffffffffffffff9c
RBP: 00007f79309dcc00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007f7931616128 R14: 00007f7931616090 R15: 00007ffebf908ac8
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522
 kmalloc include/linux/slab.h:607 [inline]
 kzalloc include/linux/slab.h:738 [inline]
 dvb_register_device+0x311/0x2170 drivers/media/dvb-core/dvbdev.c:488
 dvb_register_frontend+0x645/0x920 drivers/media/dvb-core/dvb_frontend.c:3034
 vidtv_bridge_dvb_init drivers/media/test-drivers/vidtv/vidtv_bridge.c:438 [inline]
 vidtv_bridge_probe+0x9a1/0xf70 drivers/media/test-drivers/vidtv/vidtv_bridge.c:510
 platform_probe+0x137/0x1c0 drivers/base/platform.c:1391
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x284/0xc80 drivers/base/dd.c:595
 __driver_probe_device+0x1ef/0x390 drivers/base/dd.c:775
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:805
 __driver_attach+0x46b/0x670 drivers/base/dd.c:1184
 bus_for_each_dev+0x182/0x1f0 drivers/base/bus.c:303
 bus_add_driver+0x30a/0x5a0 drivers/base/bus.c:620
 driver_register+0x32d/0x430 drivers/base/driver.c:240
 vidtv_bridge_init+0x39/0x70 drivers/media/test-drivers/vidtv/vidtv_bridge.c:602
 do_one_initcall+0x272/0x730 init/main.c:1316
 do_initcall_level+0x137/0x1f0 init/main.c:1389
 do_initcalls+0x4b/0x90 init/main.c:1405
 kernel_init_freeable+0x3e9/0x570 init/main.c:1629
 kernel_init+0x19/0x1b0 init/main.c:1520
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Freed by task 4385:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1710 [inline]
 slab_free_freelist_hook+0xea/0x170 mm/slub.c:1736
 slab_free mm/slub.c:3504 [inline]
 kfree+0xef/0x2a0 mm/slub.c:4564
 dvb_free_device drivers/media/dvb-core/dvbdev.c:635 [inline]
 kref_put include/linux/kref.h:65 [inline]
 dvb_device_put drivers/media/dvb-core/dvbdev.c:650 [inline]
 dvb_device_open+0x2e7/0x370 drivers/media/dvb-core/dvbdev.c:123
 chrdev_open+0x5c5/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x7ff/0xf80 fs/open.c:826
 do_open fs/namei.c:3616 [inline]
 path_openat+0x26f5/0x2fa0 fs/namei.c:3750
 do_filp_open+0x1e2/0x410 fs/namei.c:3777
 do_sys_openat2+0x150/0x4b0 fs/open.c:1255
 do_sys_open fs/open.c:1271 [inline]
 __do_sys_openat fs/open.c:1287 [inline]
 __se_sys_openat fs/open.c:1282 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1282
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff88814b60d800
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 24 bytes inside of
 256-byte region [ffff88814b60d800, ffff88814b60d900)
The buggy address belongs to the page:
page:ffffea00052d8300 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88814b60cc00 pfn:0x14b60c
head:ffffea00052d8300 order:1 compound_mapcount:0
flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff)
raw: 057ff00000010200 ffffea00052e2f08 ffff888140000708 ffff888016c41b40
raw: ffff88814b60cc00 000000000010000f 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, ts 19493024375, free_ts 0
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
 alloc_page_interleave+0x24/0x1e0 mm/mempolicy.c:2031
 alloc_slab_page mm/slub.c:1780 [inline]
 allocate_slab mm/slub.c:1917 [inline]
 new_slab+0xc0/0x4b0 mm/slub.c:1980
 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013
 __slab_alloc mm/slub.c:3100 [inline]
 slab_alloc_node mm/slub.c:3191 [inline]
 __kmalloc_node+0x200/0x3b0 mm/slub.c:4456
 kmalloc_node include/linux/slab.h:630 [inline]
 kvmalloc_node+0x84/0x130 mm/util.c:619
 kvmalloc include/linux/mm.h:816 [inline]
 kvzalloc include/linux/mm.h:824 [inline]
 v4l2_ctrl_new+0x70f/0x1310 drivers/media/v4l2-core/v4l2-ctrls-core.c:1306
 v4l2_ctrl_new_std+0x247/0x300 drivers/media/v4l2-core/v4l2-ctrls-core.c:1429
 handler_new_ref+0x14a/0x950 drivers/media/v4l2-core/v4l2-ctrls-core.c:1098
 v4l2_ctrl_add_handler+0x197/0x280 drivers/media/v4l2-core/v4l2-ctrls-core.c:1573
 vivid_create_controls+0x2977/0x3460 drivers/media/test-drivers/vivid/vivid-ctrls.c:1914
 vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:1860 [inline]
 vivid_probe+0x3c47/0x67a0 drivers/media/test-drivers/vivid/vivid-core.c:2031
 platform_probe+0x137/0x1c0 drivers/base/platform.c:1391
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x284/0xc80 drivers/base/dd.c:595
 __driver_probe_device+0x1ef/0x390 drivers/base/dd.c:775
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88814b60d700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88814b60d780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88814b60d800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff88814b60d880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88814b60d900: 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_device_open+0xc6/0x370 drivers/media/dvb-core/dvbdev.c:109
Read of size 8 at addr ffff88814b60d818 by task syz.3.26/4391

CPU: 0 PID: 4391 Comm: syz.3.26 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 dvb_device_open+0xc6/0x370 drivers/media/dvb-core/dvbdev.c:109
 chrdev_open+0x5c5/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x7ff/0xf80 fs/open.c:826
 do_open fs/namei.c:3616 [inline]
 path_openat+0x26f5/0x2fa0 fs/namei.c:3750
 do_filp_open+0x1e2/0x410 fs/namei.c:3777
 do_sys_openat2+0x150/0x4b0 fs/open.c:1255
 do_sys_open fs/open.c:1271 [inline]
 __do_sys_openat fs/open.c:1287 [inline]
 __se_sys_openat fs/open.c:1282 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1282
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f793135d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f79309dcb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f79309dd6c0 RCX: 00007f793135d68e
RDX: 0000000000040002 RSI: 00007f79309dcc00 RDI: ffffffffffffff9c
RBP: 00007f79309dcc00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007f7931616128 R14: 00007f7931616090 R15: 00007ffebf908ac8
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522
 kmalloc include/linux/slab.h:607 [inline]
 kzalloc include/linux/slab.h:738 [inline]
 dvb_register_device+0x311/0x2170 drivers/media/dvb-core/dvbdev.c:488
 dvb_register_frontend+0x645/0x920 drivers/media/dvb-core/dvb_frontend.c:3034
 vidtv_bridge_dvb_init drivers/media/test-drivers/vidtv/vidtv_bridge.c:438 [inline]
 vidtv_bridge_probe+0x9a1/0xf70 drivers/media/test-drivers/vidtv/vidtv_bridge.c:510
 platform_probe+0x137/0x1c0 drivers/base/platform.c:1391
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x284/0xc80 drivers/base/dd.c:595
 __driver_probe_device+0x1ef/0x390 drivers/base/dd.c:775
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:805
 __driver_attach+0x46b/0x670 drivers/base/dd.c:1184
 bus_for_each_dev+0x182/0x1f0 drivers/base/bus.c:303
 bus_add_driver+0x30a/0x5a0 drivers/base/bus.c:620
 driver_register+0x32d/0x430 drivers/base/driver.c:240
 vidtv_bridge_init+0x39/0x70 drivers/media/test-drivers/vidtv/vidtv_bridge.c:602
 do_one_initcall+0x272/0x730 init/main.c:1316
 do_initcall_level+0x137/0x1f0 init/main.c:1389
 do_initcalls+0x4b/0x90 init/main.c:1405
 kernel_init_freeable+0x3e9/0x570 init/main.c:1629
 kernel_init+0x19/0x1b0 init/main.c:1520
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Freed by task 4385:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1710 [inline]
 slab_free_freelist_hook+0xea/0x170 mm/slub.c:1736
 slab_free mm/slub.c:3504 [inline]
 kfree+0xef/0x2a0 mm/slub.c:4564
 dvb_free_device drivers/media/dvb-core/dvbdev.c:635 [inline]
 kref_put include/linux/kref.h:65 [inline]
 dvb_device_put drivers/media/dvb-core/dvbdev.c:650 [inline]
 dvb_device_open+0x2e7/0x370 drivers/media/dvb-core/dvbdev.c:123
 chrdev_open+0x5c5/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x7ff/0xf80 fs/open.c:826
 do_open fs/namei.c:3616 [inline]
 path_openat+0x26f5/0x2fa0 fs/namei.c:3750
 do_filp_open+0x1e2/0x410 fs/namei.c:3777
 do_sys_openat2+0x150/0x4b0 fs/open.c:1255
 do_sys_open fs/open.c:1271 [inline]
 __do_sys_openat fs/open.c:1287 [inline]
 __se_sys_openat fs/open.c:1282 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1282
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff88814b60d800
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 24 bytes inside of
 256-byte region [ffff88814b60d800, ffff88814b60d900)
The buggy address belongs to the page:
page:ffffea00052d8300 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88814b60cc00 pfn:0x14b60c
head:ffffea00052d8300 order:1 compound_mapcount:0
flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff)
raw: 057ff00000010200 ffffea00052e2f08 ffff888140000708 ffff888016c41b40
raw: ffff88814b60cc00 000000000010000f 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, ts 19493024375, free_ts 0
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
 alloc_page_interleave+0x24/0x1e0 mm/mempolicy.c:2031
 alloc_slab_page mm/slub.c:1780 [inline]
 allocate_slab mm/slub.c:1917 [inline]
 new_slab+0xc0/0x4b0 mm/slub.c:1980
 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013
 __slab_alloc mm/slub.c:3100 [inline]
 slab_alloc_node mm/slub.c:3191 [inline]
 __kmalloc_node+0x200/0x3b0 mm/slub.c:4456
 kmalloc_node include/linux/slab.h:630 [inline]
 kvmalloc_node+0x84/0x130 mm/util.c:619
 kvmalloc include/linux/mm.h:816 [inline]
 kvzalloc include/linux/mm.h:824 [inline]
 v4l2_ctrl_new+0x70f/0x1310 drivers/media/v4l2-core/v4l2-ctrls-core.c:1306
 v4l2_ctrl_new_std+0x247/0x300 drivers/media/v4l2-core/v4l2-ctrls-core.c:1429
 handler_new_ref+0x14a/0x950 drivers/media/v4l2-core/v4l2-ctrls-core.c:1098
 v4l2_ctrl_add_handler+0x197/0x280 drivers/media/v4l2-core/v4l2-ctrls-core.c:1573
 vivid_create_controls+0x2977/0x3460 drivers/media/test-drivers/vivid/vivid-ctrls.c:1914
 vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:1860 [inline]
 vivid_probe+0x3c47/0x67a0 drivers/media/test-drivers/vivid/vivid-core.c:2031
 platform_probe+0x137/0x1c0 drivers/base/platform.c:1391
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x284/0xc80 drivers/base/dd.c:595
 __driver_probe_device+0x1ef/0x390 drivers/base/dd.c:775
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88814b60d700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88814b60d780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88814b60d800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff88814b60d880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88814b60d900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================