Extracting prog: 3m0.968667602s Minimizing prog: 6m42.78015953s Simplifying prog options: 7m19.207830432s Extracting C: 1m7.320046082s Simplifying C: 0s extracting reproducer from 38 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_ftrace_set_event_fops_trace_events-pread64$auto detailed listing: executing program 0: r0 = openat$auto_ftrace_set_event_fops_trace_events(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/tracing/set_event\x00', 0x40, 0x0) pread64$auto(r0, 0x0, 0x400, 0x9871) (fail_nth: 2) program crashed: WARNING: bad unlock balance in traverse single: successfully extracted reproducer found reproducer with 2 syscalls minimizing guilty program testing program (duration=53.277887947s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_ftrace_set_event_fops_trace_events detailed listing: executing program 0: openat$auto_ftrace_set_event_fops_trace_events(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/tracing/set_event\x00', 0x40, 0x0) program did not crash testing program (duration=53.277887947s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): pread64$auto detailed listing: executing program 0: pread64$auto(0xffffffffffffffff, 0x0, 0x400, 0x9871) (fail_nth: 2) program did not crash testing program (duration=53.277887947s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_ftrace_set_event_fops_trace_events-pread64$auto detailed listing: executing program 0: r0 = openat$auto_ftrace_set_event_fops_trace_events(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/tracing/set_event\x00', 0x40, 0x0) pread64$auto(r0, 0x0, 0x400, 0x9871) program did not crash testing program (duration=53.277887947s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_ftrace_set_event_fops_trace_events-pread64$auto detailed listing: executing program 0: r0 = openat$auto_ftrace_set_event_fops_trace_events(0xffffffffffffff9c, 0x0, 0x40, 0x0) pread64$auto(r0, 0x0, 0x400, 0x9871) (fail_nth: 2) program did not crash extracting C reproducer testing compiled C program (duration=53.277887947s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_ftrace_set_event_fops_trace_events-pread64$auto program did not crash simplifying guilty program options testing program (duration=53.277887947s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_ftrace_set_event_fops_trace_events-pread64$auto detailed listing: executing program 0: r0 = openat$auto_ftrace_set_event_fops_trace_events(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/tracing/set_event\x00', 0x40, 0x0) pread64$auto(r0, 0x0, 0x400, 0x9871) (fail_nth: 2) program crashed: WARNING: bad unlock balance in traverse extracting C reproducer testing compiled C program (duration=53.277887947s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_ftrace_set_event_fops_trace_events-pread64$auto program did not crash testing program (duration=53.277887947s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_ftrace_set_event_fops_trace_events-pread64$auto detailed listing: executing program 0: r0 = openat$auto_ftrace_set_event_fops_trace_events(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/tracing/set_event\x00', 0x40, 0x0) pread64$auto(r0, 0x0, 0x400, 0x9871) (fail_nth: 2) program did not crash testing program (duration=53.277887947s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_ftrace_set_event_fops_trace_events-pread64$auto detailed listing: executing program 0: r0 = openat$auto_ftrace_set_event_fops_trace_events(0xffffffffffffff9c, &(0x7f0000000140)='/sys/kernel/debug/tracing/set_event\x00', 0x40, 0x0) pread64$auto(r0, 0x0, 0x400, 0x9871) (fail_nth: 2) program crashed: WARNING: bad unlock balance in traverse extracting C reproducer testing compiled C program (duration=53.277887947s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$auto_ftrace_set_event_fops_trace_events-pread64$auto program did not crash reproducing took 18m41.648920297s repro crashed as (corrupted=false): 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:00007ffdab0827c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 00007f06103a5fa0 RCX: 00007f061018d169 RDX: 0000000000000400 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffdab082820 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000009871 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f06103a5fa0 R14: 00007f06103a5fa0 R15: 0000000000000004 ===================================== WARNING: bad unlock balance detected! 6.14.0-rc4-syzkaller-00052-gac9c34d1e45a #0 Not tainted ------------------------------------- syz.0.17/6067 is trying to release lock (event_mutex) at: [] traverse.part.0.constprop.0+0x2bd/0x640 fs/seq_file.c:131 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz.0.17/6067: #0: ffff888032e872f0 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182 stack backtrace: CPU: 1 UID: 0 PID: 6067 Comm: syz.0.17 Not tainted 6.14.0-rc4-syzkaller-00052-gac9c34d1e45a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_unlock_imbalance_bug kernel/locking/lockdep.c:5289 [inline] print_unlock_imbalance_bug+0x1aa/0x1f0 kernel/locking/lockdep.c:5263 __lock_release kernel/locking/lockdep.c:5528 [inline] lock_release+0x525/0x6f0 kernel/locking/lockdep.c:5872 __mutex_unlock_slowpath+0xa3/0x6a0 kernel/locking/mutex.c:891 traverse.part.0.constprop.0+0x2bd/0x640 fs/seq_file.c:131 traverse fs/seq_file.c:98 [inline] seq_read_iter+0x934/0x12b0 fs/seq_file.c:195 seq_read+0x39f/0x4e0 fs/seq_file.c:162 vfs_read+0x1df/0xbf0 fs/read_write.c:563 ksys_pread64 fs/read_write.c:756 [inline] __do_sys_pread64 fs/read_write.c:764 [inline] __se_sys_pread64 fs/read_write.c:761 [inline] __x64_sys_pread64+0x1f6/0x250 fs/read_write.c:761 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f061018d169 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:00007ffdab0827c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 00007f06103a5fa0 RCX: 00007f061018d169 RDX: 0000000000000400 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffdab082820 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000009871 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f06103a5fa0 R14: 00007f06103a5fa0 R15: 0000000000000004 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff c3 inc %ebx 2: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 40 00 nopl 0x0(%rax) 10: 48 89 f8 mov %rdi,%rax 13: 48 89 f7 mov %rsi,%rdi 16: 48 89 d6 mov %rdx,%rsi 19: 48 89 ca mov %rcx,%rdx 1c: 4d 89 c2 mov %r8,%r10 1f: 4d 89 c8 mov %r9,%r8 22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 27: 0f 05 syscall * 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 2f: 73 01 jae 0x32 31: c3 ret 32: 48 c7 c1 a8 ff ff ff mov $0xffffffffffffffa8,%rcx 39: f7 d8 neg %eax 3b: 64 89 01 mov %eax,%fs:(%rcx) 3e: 48 rex.W final repro crashed as (corrupted=false): 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:00007ffdab0827c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 00007f06103a5fa0 RCX: 00007f061018d169 RDX: 0000000000000400 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffdab082820 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000009871 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f06103a5fa0 R14: 00007f06103a5fa0 R15: 0000000000000004 ===================================== WARNING: bad unlock balance detected! 6.14.0-rc4-syzkaller-00052-gac9c34d1e45a #0 Not tainted ------------------------------------- syz.0.17/6067 is trying to release lock (event_mutex) at: [] traverse.part.0.constprop.0+0x2bd/0x640 fs/seq_file.c:131 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz.0.17/6067: #0: ffff888032e872f0 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182 stack backtrace: CPU: 1 UID: 0 PID: 6067 Comm: syz.0.17 Not tainted 6.14.0-rc4-syzkaller-00052-gac9c34d1e45a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_unlock_imbalance_bug kernel/locking/lockdep.c:5289 [inline] print_unlock_imbalance_bug+0x1aa/0x1f0 kernel/locking/lockdep.c:5263 __lock_release kernel/locking/lockdep.c:5528 [inline] lock_release+0x525/0x6f0 kernel/locking/lockdep.c:5872 __mutex_unlock_slowpath+0xa3/0x6a0 kernel/locking/mutex.c:891 traverse.part.0.constprop.0+0x2bd/0x640 fs/seq_file.c:131 traverse fs/seq_file.c:98 [inline] seq_read_iter+0x934/0x12b0 fs/seq_file.c:195 seq_read+0x39f/0x4e0 fs/seq_file.c:162 vfs_read+0x1df/0xbf0 fs/read_write.c:563 ksys_pread64 fs/read_write.c:756 [inline] __do_sys_pread64 fs/read_write.c:764 [inline] __se_sys_pread64 fs/read_write.c:761 [inline] __x64_sys_pread64+0x1f6/0x250 fs/read_write.c:761 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f061018d169 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:00007ffdab0827c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 00007f06103a5fa0 RCX: 00007f061018d169 RDX: 0000000000000400 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffdab082820 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000009871 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f06103a5fa0 R14: 00007f06103a5fa0 R15: 0000000000000004 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff c3 inc %ebx 2: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 40 00 nopl 0x0(%rax) 10: 48 89 f8 mov %rdi,%rax 13: 48 89 f7 mov %rsi,%rdi 16: 48 89 d6 mov %rdx,%rsi 19: 48 89 ca mov %rcx,%rdx 1c: 4d 89 c2 mov %r8,%r10 1f: 4d 89 c8 mov %r9,%r8 22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 27: 0f 05 syscall * 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 2f: 73 01 jae 0x32 31: c3 ret 32: 48 c7 c1 a8 ff ff ff mov $0xffffffffffffffa8,%rcx 39: f7 d8 neg %eax 3b: 64 89 01 mov %eax,%fs:(%rcx) 3e: 48 rex.W