audit: type=1400 audit(1663243279.457:8): avc: denied { kernel } for pid=3745 comm="syz-executor.0" 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-20220915 #1 Not tainted ------------------------------------------------------ syz-executor.0/3746 is trying to acquire lock: ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70 but task is already holding lock: ffff888008b0d820 (&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 schedule+0xda/0x1b0 futex_wait_queue+0xf5/0x1e0 futex_wait+0x28e/0x690 do_futex+0x2ff/0x380 __x64_sys_futex+0x1c6/0x4d0 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+0x4183/0x6e20 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 do_con_write+0xc05/0x1d50 con_write+0x21/0x40 n_tty_write+0x4d4/0xfe0 file_tty_write.constprop.0+0x49c/0x8f0 vfs_write+0x9c3/0xd90 ksys_write+0x127/0x250 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 schedule+0xda/0x1b0 futex_wait_queue+0xf5/0x1e0 futex_wait+0x28e/0x690 do_futex+0x2ff/0x380 __x64_sys_futex+0x1c6/0x4d0 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.0/3746: #0: ffff88806cf37cd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470 #1: ffff888008b0d820 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0 stack backtrace: CPU: 1 PID: 3746 Comm: syz-executor.0 Not tainted 6.0.0-rc5-next-20220915 #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:ffff8880184d78f8 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88800ff71ac0 RSI: ffffffff81566027 RDI: 0000000000000005 RBP: ffff88803eea8000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865ac05b R12: ffff888008b0d800 R13: ffff88806cf3d100 R14: ffffffff8547c660 R15: 0000000000000002 ctx_sched_out+0x8f1/0xc10 __perf_event_task_sched_out+0x6d0/0x18d0 __schedule+0xedd/0x2470 schedule+0xda/0x1b0 futex_wait_queue+0xf5/0x1e0 futex_wait+0x28e/0x690 do_futex+0x2ff/0x380 __x64_sys_futex+0x1c6/0x4d0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcce4efeb19 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:00007fcce2474218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007fcce5011f68 RCX: 00007fcce4efeb19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fcce5011f68 RBP: 00007fcce5011f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcce5011f6c R13: 00007ffc09d1565f R14: 00007fcce2474300 R15: 0000000000022000 WARNING: CPU: 1 PID: 3746 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460 Modules linked in: CPU: 1 PID: 3746 Comm: syz-executor.0 Not tainted 6.0.0-rc5-next-20220915 #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:ffff8880184d78f8 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88800ff71ac0 RSI: ffffffff81566027 RDI: 0000000000000005 RBP: ffff88803eea8000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865ac05b R12: ffff888008b0d800 R13: ffff88806cf3d100 R14: ffffffff8547c660 R15: 0000000000000002 FS: 00007fcce2474700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fee50073000 CR3: 00000000174c8000 CR4: 0000000000350ee0 Call Trace: ctx_sched_out+0x8f1/0xc10 __perf_event_task_sched_out+0x6d0/0x18d0 __schedule+0xedd/0x2470 schedule+0xda/0x1b0 futex_wait_queue+0xf5/0x1e0 futex_wait+0x28e/0x690 do_futex+0x2ff/0x380 __x64_sys_futex+0x1c6/0x4d0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcce4efeb19 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:00007fcce2474218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007fcce5011f68 RCX: 00007fcce4efeb19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fcce5011f68 RBP: 00007fcce5011f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcce5011f6c R13: 00007ffc09d1565f R14: 00007fcce2474300 R15: 0000000000022000 irq event stamp: 864 hardirqs last enabled at (863): [] syscall_enter_from_user_mode+0x1d/0x50 hardirqs last disabled at (864): [] __schedule+0x1225/0x2470 softirqs last enabled at (604): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (345): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- Bluetooth: Unexpected continuation frame (len 55) Bluetooth: Wrong link type (-71) Bluetooth: Unexpected continuation frame (len 55) Bluetooth: Wrong link type (-71) Bluetooth: Unexpected continuation frame (len 55) Bluetooth: Wrong link type (-71) Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 10:aa:aa:aa:aa:aa Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 10:aa:aa:aa:aa:aa Process accounting resumed Bluetooth: Unexpected continuation frame (len 55) Bluetooth: Wrong link type (-71) Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 10:aa:aa:aa:aa:aa Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 10:aa:aa:aa:aa:aa Process accounting resumed Bluetooth: Unexpected continuation frame (len 55) Bluetooth: Wrong link type (-71) Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 10:aa:aa:aa:aa:aa Bluetooth: hci7: link tx timeout Bluetooth: hci7: killing stalled connection 10:aa:aa:aa:aa:aa Bluetooth: Unexpected start frame (len 18) Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: Unexpected start frame (len 18) Process accounting resumed Bluetooth: Unexpected start frame (len 18) Bluetooth: Unexpected start frame (len 18) Process accounting resumed Process accounting resumed hrtimer: interrupt took 21110 ns Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Process accounting resumed Bluetooth: Unexpected start frame (len 18) Bluetooth: Unexpected start frame (len 18) Bluetooth: Unexpected start frame (len 18) loop4: detected capacity change from 0 to 255 isofs_fill_super: bread failed, dev=loop4, iso_blknum=64, block=128 loop4: detected capacity change from 0 to 255 isofs_fill_super: bread failed, dev=loop4, iso_blknum=64, block=128 Process accounting resumed loop4: detected capacity change from 0 to 255 isofs_fill_super: bread failed, dev=loop4, iso_blknum=64, block=128 loop6: detected capacity change from 0 to 40 Process accounting resumed loop6: detected capacity change from 0 to 40 syz-executor.5 (4143) used greatest stack depth: 24600 bytes left loop4: detected capacity change from 0 to 255 loop6: detected capacity change from 0 to 40 isofs_fill_super: bread failed, dev=loop4, iso_blknum=64, block=128 loop4: detected capacity change from 0 to 255 isofs_fill_super: bread failed, dev=loop4, iso_blknum=64, block=128 syz-executor.7 (4179) used greatest stack depth: 24536 bytes left loop6: detected capacity change from 0 to 40 loop2: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 40 loop3: detected capacity change from 0 to 40 loop2: detected capacity change from 0 to 40 loop6: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 40 loop5: detected capacity change from 0 to 40 loop2: detected capacity change from 0 to 40 loop3: detected capacity change from 0 to 40 loop5: detected capacity change from 0 to 40 loop3: detected capacity change from 0 to 40 loop5: detected capacity change from 0 to 40 capability: warning: `syz-executor.0' uses deprecated v2 capabilities in a way that may be insecure SELinux: security_context_str_to_sid (staff_u) failed with errno=-22 loop3: detected capacity change from 0 to 16256 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= SELinux: security_context_str_to_sid (staff_u) failed with errno=-22 loop3: detected capacity change from 0 to 16256 SELinux: security_context_str_to_sid (staff_u) failed with errno=-22 loop3: detected capacity change from 0 to 16256 SELinux: security_context_str_to_sid (staff_u) failed with errno=-22 loop4: detected capacity change from 0 to 16256 SELinux: security_context_str_to_sid (staff_u) failed with errno=-22 SELinux: security_context_str_to_sid (staff_u) failed with errno=-22 loop4: detected capacity change from 0 to 16256 loop3: detected capacity change from 0 to 16256 SELinux: security_context_str_to_sid (staff_u) failed with errno=-22 loop4: detected capacity change from 0 to 16256 capability: warning: `syz-executor.5' uses 32-bit capabilities (legacy support in use) loop2: detected capacity change from 0 to 4728 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root SELinux: security_context_str_to_sid (staff_u) failed with errno=-22 loop3: detected capacity change from 0 to 16256 loop2: detected capacity change from 0 to 4728 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root