Extracting prog: 4m17.120592304s
Minimizing prog: 12m47.921509887s
Simplifying prog options: 0s
Extracting C: 42.979138994s
Simplifying C: 11m44.907177455s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000140)=ANY=[@ANYBLOB="12010000cc1ef420890b070064ef000000010902120001000000000904"], 0x0)
r0 = syz_open_dev$dvb_demux(&(0x7f0000000100), 0xcd79, 0x141000)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(r0, 0x40146f2c, &(0x7f0000000040)={0x2, 0x0, 0x1, 0x7, 0x4})

program did not crash
program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000140)=ANY=[@ANYBLOB="12010000cc1ef420890b070064ef000000010902120001000000000904"], 0x0)
r0 = syz_open_dev$dvb_demux(&(0x7f0000000100), 0xcd79, 0x141000)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(r0, 0x40146f2c, &(0x7f0000000040)={0x2, 0x0, 0x1, 0x7, 0x4})

program crashed: WARNING in as102_dvb_dmx_start_feed
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=1m27.782406038s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-syz_open_dev$dvb_demux
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000140)=ANY=[@ANYBLOB="12010000cc1ef420890b070064ef000000010902120001000000000904"], 0x0)
syz_open_dev$dvb_demux(&(0x7f0000000100), 0xcd79, 0x141000)

program did not crash
testing program (duration=1m27.782406038s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000140)=ANY=[@ANYBLOB="12010000cc1ef420890b070064ef000000010902120001000000000904"], 0x0)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(0xffffffffffffffff, 0x40146f2c, &(0x7f0000000040)={0x2, 0x0, 0x1, 0x7, 0x4})

program did not crash
testing program (duration=1m27.782406038s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
r0 = syz_open_dev$dvb_demux(&(0x7f0000000100), 0xcd79, 0x141000)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(r0, 0x40146f2c, &(0x7f0000000040)={0x2, 0x0, 0x1, 0x7, 0x4})

program did not crash
testing program (duration=1m27.782406038s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, 0x0, 0x0)
r0 = syz_open_dev$dvb_demux(&(0x7f0000000100), 0xcd79, 0x141000)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(r0, 0x40146f2c, &(0x7f0000000040)={0x2, 0x0, 0x1, 0x7, 0x4})

program did not crash
testing program (duration=1m27.782406038s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000140)=ANY=[@ANYBLOB], 0x0)
r0 = syz_open_dev$dvb_demux(&(0x7f0000000100), 0xcd79, 0x141000)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(r0, 0x40146f2c, &(0x7f0000000040)={0x2, 0x0, 0x1, 0x7, 0x4})

program did not crash
testing program (duration=1m27.782406038s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000140)=ANY=[@ANYBLOB="12010000cc1ef420890b070064ef000000010902120001000000000904"], 0x0)
r0 = syz_open_dev$dvb_demux(0x0, 0xcd79, 0x141000)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(r0, 0x40146f2c, &(0x7f0000000040)={0x2, 0x0, 0x1, 0x7, 0x4})

program did not crash
testing program (duration=1m27.782406038s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000140)=ANY=[@ANYBLOB="12010000cc1ef420890b070064ef000000010902120001000000000904"], 0x0)
r0 = syz_open_dev$dvb_demux(&(0x7f0000000100), 0xcd79, 0x141000)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(r0, 0x40146f2c, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m27.782406038s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
program crashed: WARNING in as102_dvb_dmx_start_feed
simplifying C reproducer
testing compiled C program (duration=1m27.782406038s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
program crashed: WARNING in as102_dvb_dmx_start_feed
testing compiled C program (duration=1m27.782406038s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace 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}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
program did not crash
testing compiled C program (duration=1m27.782406038s, {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}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
program crashed: WARNING in as102_dvb_dmx_start_feed
testing compiled C program (duration=1m27.782406038s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
program crashed: WARNING in as102_dvb_dmx_start_feed
testing compiled C program (duration=1m27.782406038s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
program crashed: WARNING in as102_dvb_dmx_start_feed
testing compiled C program (duration=1m27.782406038s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
program crashed: WARNING in as102_dvb_dmx_start_feed
testing compiled C program (duration=1m27.782406038s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
program crashed: WARNING in as102_dvb_dmx_start_feed
testing compiled C program (duration=1m27.782406038s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
program crashed: WARNING in as102_dvb_dmx_start_feed
testing program (duration=1m27.782406038s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000140)=ANY=[@ANYBLOB="12010000cc1ef420890b070064ef000000010902120001000000000904"], 0x0)
r0 = syz_open_dev$dvb_demux(&(0x7f0000000100), 0xcd79, 0x141000)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(r0, 0x40146f2c, &(0x7f0000000040)={0x2, 0x0, 0x1, 0x7, 0x4})

program crashed: WARNING in as102_dvb_dmx_start_feed
validation run: crashed=true
testing program (duration=1m27.782406038s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000140)=ANY=[@ANYBLOB="12010000cc1ef420890b070064ef000000010902120001000000000904"], 0x0)
r0 = syz_open_dev$dvb_demux(&(0x7f0000000100), 0xcd79, 0x141000)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(r0, 0x40146f2c, &(0x7f0000000040)={0x2, 0x0, 0x1, 0x7, 0x4})

program crashed: WARNING in as102_dvb_dmx_start_feed
validation run: crashed=true
testing program (duration=1m27.782406038s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_open_dev$dvb_demux-ioctl$DVB_DEMUX_DMX_SET_PES_FILTER
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x24, &(0x7f0000000140)=ANY=[@ANYBLOB="12010000cc1ef420890b070064ef000000010902120001000000000904"], 0x0)
r0 = syz_open_dev$dvb_demux(&(0x7f0000000100), 0xcd79, 0x141000)
ioctl$DVB_DEMUX_DMX_SET_PES_FILTER(r0, 0x40146f2c, &(0x7f0000000040)={0x2, 0x0, 0x1, 0x7, 0x4})

program crashed: WARNING in as102_dvb_dmx_start_feed
validation run: crashed=true
reproducing took 34m14.930338651s
repro crashed as (corrupted=false):
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: kernel/locking/mutex.c:625 at __mutex_lock_common kernel/locking/mutex.c:625 [inline], CPU#0: syz.3.64/6026
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x12e2/0x1550 kernel/locking/mutex.c:821, CPU#0: syz.3.64/6026
Modules linked in:
CPU: 0 UID: 0 PID: 6026 Comm: syz.3.64 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x12e9/0x1550 kernel/locking/mutex.c:821
Code: 93 7a 90 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 47 02 00 00 83 3d eb 61 92 04 00 75 13 48 8d 3d 6e 5e 95 04 48 c7 c6 20 12 0d 8c <67> 48 0f b9 3a 90 e9 6b ee ff ff 90 0f 0b 90 e9 3e f2 ff ff 90 0f
RSP: 0018:ffffc9000590f8c0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88801dff0000
RDX: 0000000000000000 RSI: ffffffff8c0d1220 RDI: ffffffff907d9010
RBP: ffffc9000590fa60 R08: ffffffff907a9383 R09: 1ffffffff20f5270
R10: dffffc0000000000 R11: fffffbfff20f5271 R12: ffff888035376b30
R13: 0000000000000000 R14: 1ffff92000b21f2c R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124cc8000(0063) knlGS:00000000576df480
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002d463fff CR3: 00000000737c8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 as102_dvb_dmx_start_feed+0x70/0x290 drivers/media/usb/as102/as102_drv.c:139
 dmx_ts_feed_start_filtering+0x129/0x220 drivers/media/dvb-core/dvb_demux.c:747
 dvb_dmxdev_start_feed drivers/media/dvb-core/dmxdev.c:658 [inline]
 dvb_dmxdev_filter_start+0x434/0x10d0 drivers/media/dvb-core/dmxdev.c:769
 dvb_demux_do_ioctl+0x48b/0x540 drivers/media/dvb-core/dmxdev.c:1099
 dvb_usercopy+0x199/0x2e0 drivers/media/dvb-core/dvbdev.c:996
 dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1208
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x5ea/0x950 fs/ioctl.c:638
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x27a/0x6a0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f230ec
Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 58 b8
RSP: 002b:00000000ffb0c79c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000040146f2c
RDX: 0000000080000040 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	93                   	xchg   %eax,%ebx
   1:	7a 90                	jp     0xffffff93
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax
   b:	84 c0                	test   %al,%al
   d:	0f 85 47 02 00 00    	jne    0x25a
  13:	83 3d eb 61 92 04 00 	cmpl   $0x0,0x49261eb(%rip)        # 0x4926205
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d 6e 5e 95 04 	lea    0x4955e6e(%rip),%rdi        # 0x4955e91
  23:	48 c7 c6 20 12 0d 8c 	mov    $0xffffffff8c0d1220,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	e9 6b ee ff ff       	jmp    0xffffeea0
  35:	90                   	nop
  36:	0f 0b                	ud2
  38:	90                   	nop
  39:	e9 3e f2 ff ff       	jmp    0xfffff27c
  3e:	90                   	nop
  3f:	0f                   	.byte 0xf

final repro crashed as (corrupted=false):
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: kernel/locking/mutex.c:625 at __mutex_lock_common kernel/locking/mutex.c:625 [inline], CPU#0: syz.3.64/6026
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x12e2/0x1550 kernel/locking/mutex.c:821, CPU#0: syz.3.64/6026
Modules linked in:
CPU: 0 UID: 0 PID: 6026 Comm: syz.3.64 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x12e9/0x1550 kernel/locking/mutex.c:821
Code: 93 7a 90 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 47 02 00 00 83 3d eb 61 92 04 00 75 13 48 8d 3d 6e 5e 95 04 48 c7 c6 20 12 0d 8c <67> 48 0f b9 3a 90 e9 6b ee ff ff 90 0f 0b 90 e9 3e f2 ff ff 90 0f
RSP: 0018:ffffc9000590f8c0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88801dff0000
RDX: 0000000000000000 RSI: ffffffff8c0d1220 RDI: ffffffff907d9010
RBP: ffffc9000590fa60 R08: ffffffff907a9383 R09: 1ffffffff20f5270
R10: dffffc0000000000 R11: fffffbfff20f5271 R12: ffff888035376b30
R13: 0000000000000000 R14: 1ffff92000b21f2c R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124cc8000(0063) knlGS:00000000576df480
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002d463fff CR3: 00000000737c8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 as102_dvb_dmx_start_feed+0x70/0x290 drivers/media/usb/as102/as102_drv.c:139
 dmx_ts_feed_start_filtering+0x129/0x220 drivers/media/dvb-core/dvb_demux.c:747
 dvb_dmxdev_start_feed drivers/media/dvb-core/dmxdev.c:658 [inline]
 dvb_dmxdev_filter_start+0x434/0x10d0 drivers/media/dvb-core/dmxdev.c:769
 dvb_demux_do_ioctl+0x48b/0x540 drivers/media/dvb-core/dmxdev.c:1099
 dvb_usercopy+0x199/0x2e0 drivers/media/dvb-core/dvbdev.c:996
 dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1208
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x5ea/0x950 fs/ioctl.c:638
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x27a/0x6a0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f230ec
Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 58 b8
RSP: 002b:00000000ffb0c79c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000040146f2c
RDX: 0000000080000040 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	93                   	xchg   %eax,%ebx
   1:	7a 90                	jp     0xffffff93
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax
   b:	84 c0                	test   %al,%al
   d:	0f 85 47 02 00 00    	jne    0x25a
  13:	83 3d eb 61 92 04 00 	cmpl   $0x0,0x49261eb(%rip)        # 0x4926205
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d 6e 5e 95 04 	lea    0x4955e6e(%rip),%rdi        # 0x4955e91
  23:	48 c7 c6 20 12 0d 8c 	mov    $0xffffffff8c0d1220,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	e9 6b ee ff ff       	jmp    0xffffeea0
  35:	90                   	nop
  36:	0f 0b                	ud2
  38:	90                   	nop
  39:	e9 3e f2 ff ff       	jmp    0xfffff27c
  3e:	90                   	nop
  3f:	0f                   	.byte 0xf