Extracting prog: 52.70212245s
Minimizing prog: 32m57.689246636s
Simplifying prog options: 7m38.511162727s
Extracting C: 2m1.064312206s
Simplifying C: 0s


extracting reproducer from 22 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:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-pwrite64$auto-openat$auto_dvb_frontend_fops_dvb_frontend-openat$auto_dvb_frontend_fops_dvb_frontend-readv$auto
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
pwrite64$auto(0xffffffffffffffff, 0x0, 0x0, 0x8)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)
readv$auto(0x3, 0x0, 0x1)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
single: successfully extracted reproducer
found reproducer with 16 syscalls
minimizing guilty program
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-pwrite64$auto-openat$auto_dvb_frontend_fops_dvb_frontend-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
pwrite64$auto(0xffffffffffffffff, 0x0, 0x0, 0x8)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_frontend_release
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-pwrite64$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
pwrite64$auto(0xffffffffffffffff, 0x0, 0x0, 0x8)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-pwrite64$auto
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
pwrite64$auto(0xffffffffffffffff, 0x0, 0x0, 0x8)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-openat$auto_proc_oom_adj_operations_base-read$auto-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
writev$auto(0xffffffffffffffff, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-openat$auto_proc_oom_adj_operations_base-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
r0 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r0, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-open-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
open(&(0x7f0000000040)='./file0\x00', 0x149443, 0x0)
read$auto(0xffffffffffffffff, 0x0, 0x1f40)
r0 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r0, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-ioctl$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
ioctl$auto(0x3, 0xae41, 0xffffffffffffffff)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-openat$auto_snd_timer_f_ops_timer-mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
openat$auto_snd_timer_f_ops_timer(0xffffffffffffff9c, 0x0, 0x242c81, 0x0)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-ioctl$auto_KVM_CREATE_VM-mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
ioctl$auto_KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): socket$nl_generic-mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, 0x0, 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, 0x0, 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, 0x0, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, 0x0, 0x1, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=45.278591266s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
program did not crash
simplifying guilty program options
testing program (duration=45.278591266s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
extracting C reproducer
testing compiled C program (duration=45.278591266s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
program did not crash
testing program (duration=45.278591266s, {Threaded:false 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program did not crash
testing program (duration=45.278591266s, {Threaded:false 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
extracting C reproducer
testing compiled C program (duration=45.278591266s, {Threaded:false 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
program did not crash
testing program (duration=45.278591266s, {Threaded:false 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
validation run: crashed=true
testing program (duration=45.278591266s, {Threaded:false 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
validation run: crashed=true
testing program (duration=45.278591266s, {Threaded:false 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}}): mmap$auto-openat$auto_proc_oom_adj_operations_base-read$auto-openat$auto_proc_fail_nth_operations_base-writev$auto-pidfd_send_signal$auto_PIDFD_SELF_THREAD-mmap$auto-openat$auto_dvb_frontend_fops_dvb_frontend
detailed listing:
executing program 0:
mmap$auto(0x0, 0x20009, 0xe2, 0xeb1, 0x405, 0x8000)
r0 = openat$auto_proc_oom_adj_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/self/oom_adj\x00', 0x48402, 0x0)
read$auto(r0, 0x0, 0x1f40)
r1 = openat$auto_proc_fail_nth_operations_base(0xffffffffffffff9c, &(0x7f0000000000)='/proc/thread-self/fail-nth\x00', 0x802, 0x0)
writev$auto(r1, &(0x7f0000000200)={0x0, 0x7}, 0x3)
pidfd_send_signal$auto_PIDFD_SELF_THREAD(0xffffffffffffd8ef, 0x3, 0x0, 0x0)
mmap$auto(0xfa, 0x2, 0x0, 0x3e, 0xffffffffffffffff, 0xffffffffffffffb1)
openat$auto_dvb_frontend_fops_dvb_frontend(0xffffffffffffff9c, &(0x7f0000000000), 0x1, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
validation run: crashed=true
reproducing took 46m36.851770745s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in dvb_device_open+0x36a/0x3b0 drivers/media/dvb-core/dvbdev.c:99
Read of size 8 at addr ffff8881432f4418 by task syz.0.40/6124

CPU: 0 UID: 0 PID: 6124 Comm: syz.0.40 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 dvb_device_open+0x36a/0x3b0 drivers/media/dvb-core/dvbdev.c:99
 chrdev_open+0x231/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x97f/0x1530 fs/open.c:965
 vfs_open+0x82/0x3f0 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x1de4/0x2cb0 fs/namei.c:4046
 do_filp_open+0x20b/0x470 fs/namei.c:4073
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd28d18ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc8d39d4b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fd28d3b5fa0 RCX: 00007fd28d18ebe9
RDX: 0000000000000001 RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007fd28d211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd28d3b5fa0 R14: 00007fd28d3b5fa0 R15: 0000000000000004
 </TASK>

Allocated by task 1:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:388 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:405
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 dvb_register_device+0x1e4/0x2370 drivers/media/dvb-core/dvbdev.c:475
 dvb_register_frontend+0x5a6/0x880 drivers/media/dvb-core/dvb_frontend.c:3051
 vidtv_bridge_dvb_init drivers/media/test-drivers/vidtv/vidtv_bridge.c:436 [inline]
 vidtv_bridge_probe+0x459/0xa90 drivers/media/test-drivers/vidtv/vidtv_bridge.c:508
 platform_probe+0x103/0x1d0 drivers/base/platform.c:1405
 call_driver_probe drivers/base/dd.c:581 [inline]
 really_probe+0x241/0xa90 drivers/base/dd.c:659
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
 __driver_attach+0x283/0x580 drivers/base/dd.c:1217
 bus_for_each_dev+0x13e/0x1d0 drivers/base/bus.c:370
 bus_add_driver+0x2e9/0x690 drivers/base/bus.c:678
 driver_register+0x15c/0x4b0 drivers/base/driver.c:249
 vidtv_bridge_init+0x45/0x80 drivers/media/test-drivers/vidtv/vidtv_bridge.c:598
 do_one_initcall+0x120/0x6e0 init/main.c:1269
 do_initcall_level init/main.c:1331 [inline]
 do_initcalls init/main.c:1347 [inline]
 do_basic_setup init/main.c:1366 [inline]
 kernel_init_freeable+0x5c2/0x910 init/main.c:1579
 kernel_init+0x1c/0x2b0 init/main.c:1469
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 6123:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:243 [inline]
 __kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2417 [inline]
 slab_free mm/slub.c:4680 [inline]
 kfree+0x2b4/0x4d0 mm/slub.c:4879
 dvb_free_device drivers/media/dvb-core/dvbdev.c:619 [inline]
 kref_put include/linux/kref.h:65 [inline]
 dvb_device_put.part.0+0x60/0x90 drivers/media/dvb-core/dvbdev.c:632
 dvb_device_put drivers/media/dvb-core/dvbdev.c:631 [inline]
 dvb_device_open+0x2a4/0x3b0 drivers/media/dvb-core/dvbdev.c:113
 chrdev_open+0x231/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x97f/0x1530 fs/open.c:965
 vfs_open+0x82/0x3f0 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x1de4/0x2cb0 fs/namei.c:4046
 do_filp_open+0x20b/0x470 fs/namei.c:4073
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8881432f4400
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 24 bytes inside of
 freed 256-byte region [ffff8881432f4400, ffff8881432f4500)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1432f4
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff88801b841b40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff88801b841b40 dead000000000122 0000000000000000
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 057ff00000000001 ffffea00050cbd01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002
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 19374648852, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:2487 [inline]
 allocate_slab mm/slub.c:2655 [inline]
 new_slab+0x247/0x330 mm/slub.c:2709
 ___slab_alloc+0xcf2/0x1740 mm/slub.c:3891
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
 __slab_alloc_node mm/slub.c:4056 [inline]
 slab_alloc_node mm/slub.c:4217 [inline]
 __kmalloc_cache_noprof+0xfb/0x3e0 mm/slub.c:4391
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 bus_add_driver+0x92/0x690 drivers/base/bus.c:662
 driver_register+0x15c/0x4b0 drivers/base/driver.c:249
 i2c_register_driver+0xd9/0x1c0 drivers/i2c/i2c-core-base.c:2022
 do_one_initcall+0x120/0x6e0 init/main.c:1269
 do_initcall_level init/main.c:1331 [inline]
 do_initcalls init/main.c:1347 [inline]
 do_basic_setup init/main.c:1366 [inline]
 kernel_init_freeable+0x5c2/0x910 init/main.c:1579
 kernel_init+0x1c/0x2b0 init/main.c:1469
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881432f4300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881432f4380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881432f4400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff8881432f4480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881432f4500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in dvb_device_open+0x36a/0x3b0 drivers/media/dvb-core/dvbdev.c:99
Read of size 8 at addr ffff8881432f4418 by task syz.0.40/6124

CPU: 0 UID: 0 PID: 6124 Comm: syz.0.40 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 dvb_device_open+0x36a/0x3b0 drivers/media/dvb-core/dvbdev.c:99
 chrdev_open+0x231/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x97f/0x1530 fs/open.c:965
 vfs_open+0x82/0x3f0 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x1de4/0x2cb0 fs/namei.c:4046
 do_filp_open+0x20b/0x470 fs/namei.c:4073
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd28d18ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc8d39d4b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fd28d3b5fa0 RCX: 00007fd28d18ebe9
RDX: 0000000000000001 RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007fd28d211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd28d3b5fa0 R14: 00007fd28d3b5fa0 R15: 0000000000000004
 </TASK>

Allocated by task 1:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:388 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:405
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 dvb_register_device+0x1e4/0x2370 drivers/media/dvb-core/dvbdev.c:475
 dvb_register_frontend+0x5a6/0x880 drivers/media/dvb-core/dvb_frontend.c:3051
 vidtv_bridge_dvb_init drivers/media/test-drivers/vidtv/vidtv_bridge.c:436 [inline]
 vidtv_bridge_probe+0x459/0xa90 drivers/media/test-drivers/vidtv/vidtv_bridge.c:508
 platform_probe+0x103/0x1d0 drivers/base/platform.c:1405
 call_driver_probe drivers/base/dd.c:581 [inline]
 really_probe+0x241/0xa90 drivers/base/dd.c:659
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:801
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
 __driver_attach+0x283/0x580 drivers/base/dd.c:1217
 bus_for_each_dev+0x13e/0x1d0 drivers/base/bus.c:370
 bus_add_driver+0x2e9/0x690 drivers/base/bus.c:678
 driver_register+0x15c/0x4b0 drivers/base/driver.c:249
 vidtv_bridge_init+0x45/0x80 drivers/media/test-drivers/vidtv/vidtv_bridge.c:598
 do_one_initcall+0x120/0x6e0 init/main.c:1269
 do_initcall_level init/main.c:1331 [inline]
 do_initcalls init/main.c:1347 [inline]
 do_basic_setup init/main.c:1366 [inline]
 kernel_init_freeable+0x5c2/0x910 init/main.c:1579
 kernel_init+0x1c/0x2b0 init/main.c:1469
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 6123:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:243 [inline]
 __kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2417 [inline]
 slab_free mm/slub.c:4680 [inline]
 kfree+0x2b4/0x4d0 mm/slub.c:4879
 dvb_free_device drivers/media/dvb-core/dvbdev.c:619 [inline]
 kref_put include/linux/kref.h:65 [inline]
 dvb_device_put.part.0+0x60/0x90 drivers/media/dvb-core/dvbdev.c:632
 dvb_device_put drivers/media/dvb-core/dvbdev.c:631 [inline]
 dvb_device_open+0x2a4/0x3b0 drivers/media/dvb-core/dvbdev.c:113
 chrdev_open+0x231/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x97f/0x1530 fs/open.c:965
 vfs_open+0x82/0x3f0 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x1de4/0x2cb0 fs/namei.c:4046
 do_filp_open+0x20b/0x470 fs/namei.c:4073
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8881432f4400
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 24 bytes inside of
 freed 256-byte region [ffff8881432f4400, ffff8881432f4500)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1432f4
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff88801b841b40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff88801b841b40 dead000000000122 0000000000000000
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 057ff00000000001 ffffea00050cbd01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002
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 19374648852, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:2487 [inline]
 allocate_slab mm/slub.c:2655 [inline]
 new_slab+0x247/0x330 mm/slub.c:2709
 ___slab_alloc+0xcf2/0x1740 mm/slub.c:3891
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
 __slab_alloc_node mm/slub.c:4056 [inline]
 slab_alloc_node mm/slub.c:4217 [inline]
 __kmalloc_cache_noprof+0xfb/0x3e0 mm/slub.c:4391
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 bus_add_driver+0x92/0x690 drivers/base/bus.c:662
 driver_register+0x15c/0x4b0 drivers/base/driver.c:249
 i2c_register_driver+0xd9/0x1c0 drivers/i2c/i2c-core-base.c:2022
 do_one_initcall+0x120/0x6e0 init/main.c:1269
 do_initcall_level init/main.c:1331 [inline]
 do_initcalls init/main.c:1347 [inline]
 do_basic_setup init/main.c:1366 [inline]
 kernel_init_freeable+0x5c2/0x910 init/main.c:1579
 kernel_init+0x1c/0x2b0 init/main.c:1469
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881432f4300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881432f4380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881432f4400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff8881432f4480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881432f4500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================