audit: type=1400 audit(1663002593.743:8): avc: denied { kernel } for pid=3771 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 ------------[ cut here ]------------ ====================================================== WARNING: possible circular locking dependency detected 6.0.0-rc5-next-20220912 #1 Not tainted ------------------------------------------------------ syz-executor.1/3773 is trying to acquire lock: ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70 but task is already holding lock: ffff88800fca0c20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ctx->lock){....}-{2:2}: _raw_spin_lock+0x2a/0x40 __perf_event_task_sched_out+0x53b/0x18d0 __schedule+0xedd/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 __mutex_lock+0xa3/0x14d0 __do_sys_perf_event_open+0x1eec/0x32c0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (&rq->__lock){-.-.}-{2:2}: _raw_spin_lock_nested+0x30/0x40 raw_spin_rq_lock_nested+0x1e/0x30 task_fork_fair+0x63/0x4d0 sched_cgroup_fork+0x3d0/0x540 copy_process+0x3f9e/0x6df0 kernel_clone+0xe7/0x890 user_mode_thread+0xad/0xf0 rest_init+0x24/0x250 arch_call_rest_init+0xf/0x14 start_kernel+0x4c1/0x4e6 secondary_startup_64_no_verify+0xe0/0xeb -> #1 (&p->pi_lock){-.-.}-{2:2}: _raw_spin_lock_irqsave+0x39/0x60 try_to_wake_up+0xab/0x1920 up+0x75/0xb0 __up_console_sem+0x6e/0x80 console_unlock+0x46a/0x590 vt_ioctl+0x2822/0x2ca0 tty_ioctl+0x7c4/0x1700 __x64_sys_ioctl+0x19a/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 ((console_sem).lock){....}-{2:2}: __lock_acquire+0x2a02/0x5e70 lock_acquire+0x1a2/0x530 _raw_spin_lock_irqsave+0x39/0x60 down_trylock+0xe/0x70 __down_trylock_console_sem+0x3b/0xd0 vprintk_emit+0x16b/0x560 vprintk+0x84/0xa0 _printk+0xba/0xf1 report_bug.cold+0x72/0xab handle_bug+0x3c/0x70 exc_invalid_op+0x14/0x50 asm_exc_invalid_op+0x16/0x20 group_sched_out.part.0+0x2c7/0x460 ctx_sched_out+0x8f1/0xc10 __perf_event_task_sched_out+0x6d0/0x18d0 __schedule+0xedd/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 __mutex_lock+0xa3/0x14d0 __do_sys_perf_event_open+0x1eec/0x32c0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: (console_sem).lock --> &rq->__lock --> &ctx->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ctx->lock); lock(&rq->__lock); lock(&ctx->lock); lock((console_sem).lock); *** DEADLOCK *** 2 locks held by syz-executor.1/3773: #0: ffff88806cf37cd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470 #1: ffff88800fca0c20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0 stack backtrace: CPU: 1 PID: 3773 Comm: syz-executor.1 Not tainted 6.0.0-rc5-next-20220912 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack_lvl+0x8b/0xb3 check_noncircular+0x263/0x2e0 __lock_acquire+0x2a02/0x5e70 lock_acquire+0x1a2/0x530 _raw_spin_lock_irqsave+0x39/0x60 down_trylock+0xe/0x70 __down_trylock_console_sem+0x3b/0xd0 vprintk_emit+0x16b/0x560 vprintk+0x84/0xa0 _printk+0xba/0xf1 report_bug.cold+0x72/0xab handle_bug+0x3c/0x70 exc_invalid_op+0x14/0x50 asm_exc_invalid_op+0x16/0x20 RIP: 0010:group_sched_out.part.0+0x2c7/0x460 Code: 5e 41 5f e9 3b b7 ef ff e8 36 b7 ef ff 65 8b 1d ab 15 ac 7e 31 ff 89 de e8 d6 b3 ef ff 85 db 0f 84 8a 00 00 00 e8 19 b7 ef ff <0f> 0b e9 a5 fe ff ff e8 0d b7 ef ff 48 8d 7d 10 48 b8 00 00 00 00 RSP: 0018:ffff888018edf978 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8880205fb580 RSI: ffffffff81566027 RDI: 0000000000000005 RBP: ffff888018dd8000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865aa05b R12: ffff88800fca0c00 R13: ffff88806cf3d100 R14: ffffffff8547c660 R15: 0000000000000002 ctx_sched_out+0x8f1/0xc10 __perf_event_task_sched_out+0x6d0/0x18d0 __schedule+0xedd/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 __mutex_lock+0xa3/0x14d0 __do_sys_perf_event_open+0x1eec/0x32c0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5c3f884b19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5c3cdfa188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f5c3f997f60 RCX: 00007f5c3f884b19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007f5c3f8def6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc5059720f R14: 00007f5c3cdfa300 R15: 0000000000022000 WARNING: CPU: 1 PID: 3773 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460 Modules linked in: CPU: 1 PID: 3773 Comm: syz-executor.1 Not tainted 6.0.0-rc5-next-20220912 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:group_sched_out.part.0+0x2c7/0x460 Code: 5e 41 5f e9 3b b7 ef ff e8 36 b7 ef ff 65 8b 1d ab 15 ac 7e 31 ff 89 de e8 d6 b3 ef ff 85 db 0f 84 8a 00 00 00 e8 19 b7 ef ff <0f> 0b e9 a5 fe ff ff e8 0d b7 ef ff 48 8d 7d 10 48 b8 00 00 00 00 RSP: 0018:ffff888018edf978 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8880205fb580 RSI: ffffffff81566027 RDI: 0000000000000005 RBP: ffff888018dd8000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865aa05b R12: ffff88800fca0c00 R13: ffff88806cf3d100 R14: ffffffff8547c660 R15: 0000000000000002 FS: 00007f5c3cdfa700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd798518368 CR3: 0000000042110000 CR4: 0000000000350ee0 Call Trace: ctx_sched_out+0x8f1/0xc10 __perf_event_task_sched_out+0x6d0/0x18d0 __schedule+0xedd/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 __mutex_lock+0xa3/0x14d0 __do_sys_perf_event_open+0x1eec/0x32c0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5c3f884b19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5c3cdfa188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f5c3f997f60 RCX: 00007f5c3f884b19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007f5c3f8def6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc5059720f R14: 00007f5c3cdfa300 R15: 0000000000022000 irq event stamp: 1670 hardirqs last enabled at (1669): [] _raw_spin_unlock_irqrestore+0x28/0x60 hardirqs last disabled at (1670): [] __schedule+0x1225/0x2470 softirqs last enabled at (850): [] fpu__clear_user_states+0xdb/0x1e0 softirqs last disabled at (848): [] fpu__clear_user_states+0x24/0x1e0 ---[ end trace 0000000000000000 ]--- loop1: detected capacity change from 0 to 40 Process accounting resumed Process accounting resumed loop1: detected capacity change from 0 to 40 Process accounting resumed loop1: detected capacity change from 0 to 40 Process accounting resumed loop1: detected capacity change from 0 to 40 Process accounting resumed Process accounting resumed audit: type=1400 audit(1663002595.869:9): avc: denied { module_load } for pid=3939 comm="syz-executor.3" path=2F6D656D66643A42DB2F89036CDE62CBB534EDBE4C4BA4673F4B29A0F09B3859B55AE11253F547CCF3E902680BCA2896E143DF1CEA8543FB1013FA0316CD05202864656C6574656429 dev="tmpfs" ino=6 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=system permissive=1 Invalid ELF header magic: != ELF Invalid ELF header magic: != ELF loop5: detected capacity change from 0 to 264192 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1400 audit(1663002596.011:10): avc: denied { write } for pid=3944 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 hrtimer: interrupt took 15980 ns ieee80211 : Selected rate control algorithm 'minstrel_ht' ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' loop1: detected capacity change from 0 to 40 Invalid ELF header magic: != ELF ieee80211 phy4: Selected rate control algorithm 'minstrel_ht' Process accounting resumed loop1: detected capacity change from 0 to 40 loop5: detected capacity change from 0 to 264192 ieee80211 phy5: Selected rate control algorithm 'minstrel_ht' Process accounting resumed syz-executor.6 (3975) used greatest stack depth: 24280 bytes left FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 264192 Invalid ELF header magic: != ELF FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee80211 phy6: Selected rate control algorithm 'minstrel_ht' loop5: detected capacity change from 0 to 264192 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee80211 phy7: Selected rate control algorithm 'minstrel_ht' loop0: detected capacity change from 0 to 264192 loop1: detected capacity change from 0 to 264192 Invalid ELF header magic: != ELF FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop1: detected capacity change from 0 to 264192 FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop0: detected capacity change from 0 to 264192 ieee80211 phy8: Selected rate control algorithm 'minstrel_ht' FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 264192 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee80211 phy9: Selected rate control algorithm 'minstrel_ht' loop1: detected capacity change from 0 to 264192 loop0: detected capacity change from 0 to 264192 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee80211 phy10: Selected rate control algorithm 'minstrel_ht' loop7: detected capacity change from 0 to 264192 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 264192 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee80211 phy11: Selected rate control algorithm 'minstrel_ht' loop7: detected capacity change from 0 to 264192 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 264192 ieee80211 phy12: Selected rate control algorithm 'minstrel_ht' FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop4: detected capacity change from 0 to 264192 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee80211 phy13: Selected rate control algorithm 'minstrel_ht' loop7: detected capacity change from 0 to 264192 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee80211 phy14: Selected rate control algorithm 'minstrel_ht' loop4: detected capacity change from 0 to 264192 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop4: detected capacity change from 0 to 264192 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) syz-executor.0 (4161) used greatest stack depth: 23448 bytes left loop6: detected capacity change from 0 to 264192 mmap: syz-executor.4 (4178) uses deprecated remap_file_pages() syscall. See Documentation/mm/remap_file_pages.rst. loop6: detected capacity change from 0 to 264192 syz-executor.0 (4174) used greatest stack depth: 23384 bytes left loop6: detected capacity change from 0 to 264192 loop2: detected capacity change from 0 to 264192 loop3: detected capacity change from 0 to 264192 loop2: detected capacity change from 0 to 264192 loop3: detected capacity change from 0 to 264192 loop6: detected capacity change from 0 to 264192 loop3: detected capacity change from 0 to 264192 loop2: detected capacity change from 0 to 264192 loop6: detected capacity change from 0 to 256 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop6: detected capacity change from 0 to 256 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop0: detected capacity change from 0 to 40 FAT-fs (loop0): Directory bread(block 24) failed FAT-fs (loop0): Directory bread(block 25) failed FAT-fs (loop0): Directory bread(block 26) failed FAT-fs (loop0): Directory bread(block 27) failed FAT-fs (loop0): Directory bread(block 28) failed FAT-fs (loop0): Directory bread(block 29) failed FAT-fs (loop0): Directory bread(block 30) failed FAT-fs (loop0): Directory bread(block 31) failed FAT-fs (loop0): Directory bread(block 32) failed FAT-fs (loop0): Directory bread(block 33) failed loop1: detected capacity change from 0 to 256 FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop6: detected capacity change from 0 to 256 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop3: detected capacity change from 0 to 40 FAT-fs (loop3): Directory bread(block 24) failed FAT-fs (loop3): Directory bread(block 25) failed loop1: detected capacity change from 0 to 256 loop5: detected capacity change from 0 to 40 FAT-fs (loop3): Directory bread(block 26) failed FAT-fs (loop3): Directory bread(block 27) failed FAT-fs (loop5): Directory bread(block 24) failed FAT-fs (loop3): Directory bread(block 28) failed FAT-fs (loop5): Directory bread(block 25) failed FAT-fs (loop5): Directory bread(block 26) failed FAT-fs (loop5): Directory bread(block 27) failed FAT-fs (loop5): Directory bread(block 28) failed FAT-fs (loop5): Directory bread(block 29) failed FAT-fs (loop5): Directory bread(block 30) failed FAT-fs (loop5): Directory bread(block 31) failed FAT-fs (loop5): Directory bread(block 32) failed FAT-fs (loop5): Directory bread(block 33) failed FAT-fs (loop3): Directory bread(block 29) failed FAT-fs (loop3): Directory bread(block 30) failed FAT-fs (loop3): Directory bread(block 31) failed FAT-fs (loop3): Directory bread(block 32) failed FAT-fs (loop3): Directory bread(block 33) failed FAT-fs (loop1): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop0: detected capacity change from 0 to 40 loop6: detected capacity change from 0 to 256 FAT-fs (loop0): Directory bread(block 24) failed FAT-fs (loop0): Directory bread(block 25) failed FAT-fs (loop0): Directory bread(block 26) failed FAT-fs (loop0): Directory bread(block 27) failed FAT-fs (loop0): Directory bread(block 28) failed FAT-fs (loop0): Directory bread(block 29) failed FAT-fs (loop0): Directory bread(block 30) failed FAT-fs (loop0): Directory bread(block 31) failed FAT-fs (loop0): Directory bread(block 32) failed FAT-fs (loop0): Directory bread(block 33) failed FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop5: detected capacity change from 0 to 40 FAT-fs (loop5): Directory bread(block 24) failed FAT-fs (loop5): Directory bread(block 25) failed FAT-fs (loop5): Directory bread(block 26) failed FAT-fs (loop5): Directory bread(block 27) failed FAT-fs (loop5): Directory bread(block 28) failed FAT-fs (loop5): Directory bread(block 29) failed FAT-fs (loop5): Directory bread(block 30) failed FAT-fs (loop5): Directory bread(block 31) failed FAT-fs (loop5): Directory bread(block 32) failed FAT-fs (loop5): Directory bread(block 33) failed loop0: detected capacity change from 0 to 40 FAT-fs (loop0): Directory bread(block 24) failed FAT-fs (loop0): Directory bread(block 25) failed FAT-fs (loop0): Directory bread(block 26) failed FAT-fs (loop0): Directory bread(block 27) failed FAT-fs (loop0): Directory bread(block 28) failed FAT-fs (loop0): Directory bread(block 29) failed FAT-fs (loop0): Directory bread(block 30) failed FAT-fs (loop0): Directory bread(block 31) failed FAT-fs (loop0): Directory bread(block 32) failed FAT-fs (loop0): Directory bread(block 33) failed loop3: detected capacity change from 0 to 40 FAT-fs (loop3): Directory bread(block 24) failed FAT-fs (loop3): Directory bread(block 25) failed FAT-fs (loop3): Directory bread(block 26) failed FAT-fs (loop3): Directory bread(block 27) failed FAT-fs (loop3): Directory bread(block 28) failed FAT-fs (loop3): Directory bread(block 29) failed FAT-fs (loop3): Directory bread(block 30) failed FAT-fs (loop3): Directory bread(block 31) failed FAT-fs (loop3): Directory bread(block 32) failed FAT-fs (loop3): Directory bread(block 33) failed audit: type=1400 audit(1663002602.746:11): avc: denied { read } for pid=4420 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop0: detected capacity change from 0 to 40 FAT-fs (loop0): Directory bread(block 24) failed FAT-fs (loop0): Directory bread(block 25) failed FAT-fs (loop0): Directory bread(block 26) failed FAT-fs (loop0): Directory bread(block 27) failed FAT-fs (loop0): Directory bread(block 28) failed FAT-fs (loop0): Directory bread(block 29) failed FAT-fs (loop0): Directory bread(block 30) failed FAT-fs (loop0): Directory bread(block 31) failed FAT-fs (loop0): Directory bread(block 32) failed FAT-fs (loop0): Directory bread(block 33) failed loop3: detected capacity change from 0 to 40 FAT-fs (loop3): Directory bread(block 24) failed FAT-fs (loop3): Directory bread(block 25) failed FAT-fs (loop3): Directory bread(block 26) failed FAT-fs (loop3): Directory bread(block 27) failed FAT-fs (loop3): Directory bread(block 28) failed FAT-fs (loop3): Directory bread(block 29) failed FAT-fs (loop3): Directory bread(block 30) failed FAT-fs (loop3): Directory bread(block 31) failed FAT-fs (loop3): Directory bread(block 32) failed FAT-fs (loop3): Directory bread(block 33) failed loop5: detected capacity change from 0 to 40 FAT-fs (loop5): Directory bread(block 24) failed FAT-fs (loop5): Directory bread(block 25) failed FAT-fs (loop5): Directory bread(block 26) failed FAT-fs (loop5): Directory bread(block 27) failed FAT-fs (loop5): Directory bread(block 28) failed FAT-fs (loop5): Directory bread(block 29) failed FAT-fs (loop5): Directory bread(block 30) failed FAT-fs (loop5): Directory bread(block 31) failed FAT-fs (loop5): Directory bread(block 32) failed FAT-fs (loop5): Directory bread(block 33) failed