audit: type=1400 audit(1663676739.833:8): avc: denied { kernel } for pid=3951 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-rc6-next-20220920 #1 Not tainted ------------------------------------------------------ syz-executor.0/3952 is trying to acquire lock: ffffffff853faab8 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70 but task is already holding lock: ffff8880099a2c20 (&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/0x1930 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.0/3952: #0: ffff88806ce37d18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470 #1: ffff8880099a2c20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0 stack backtrace: CPU: 0 PID: 3952 Comm: syz-executor.0 Not tainted 6.0.0-rc6-next-20220920 #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 9b b9 ef ff e8 96 b9 ef ff 65 8b 1d 0b 13 ac 7e 31 ff 89 de e8 36 b6 ef ff 85 db 0f 84 8a 00 00 00 e8 79 b9 ef ff <0f> 0b e9 a5 fe ff ff e8 6d b9 ef ff 48 8d 7d 10 48 b8 00 00 00 00 RSP: 0018:ffff8880407df8f8 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88803f338000 RSI: ffffffff815662c7 RDI: 0000000000000005 RBP: ffff8880086685c8 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865ae01b R12: ffff8880099a2c00 R13: ffff88806ce3d140 R14: ffffffff8547cec0 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: 0033:0x7f86252d8b19 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:00007f862284e218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f86253ebf68 RCX: 00007f86252d8b19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f86253ebf68 RBP: 00007f86253ebf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f86253ebf6c R13: 00007fff7b8aec3f R14: 00007f862284e300 R15: 0000000000022000 WARNING: CPU: 0 PID: 3952 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460 Modules linked in: CPU: 0 PID: 3952 Comm: syz-executor.0 Not tainted 6.0.0-rc6-next-20220920 #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 9b b9 ef ff e8 96 b9 ef ff 65 8b 1d 0b 13 ac 7e 31 ff 89 de e8 36 b6 ef ff 85 db 0f 84 8a 00 00 00 e8 79 b9 ef ff <0f> 0b e9 a5 fe ff ff e8 6d b9 ef ff 48 8d 7d 10 48 b8 00 00 00 00 RSP: 0018:ffff8880407df8f8 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88803f338000 RSI: ffffffff815662c7 RDI: 0000000000000005 RBP: ffff8880086685c8 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865ae01b R12: ffff8880099a2c00 R13: ffff88806ce3d140 R14: ffffffff8547cec0 R15: 0000000000000002 FS: 00007f862284e700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007febcd1a5028 CR3: 00000000184ec000 CR4: 0000000000350ef0 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: 0033:0x7f86252d8b19 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:00007f862284e218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f86253ebf68 RCX: 00007f86252d8b19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f86253ebf68 RBP: 00007f86253ebf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f86253ebf6c R13: 00007fff7b8aec3f R14: 00007f862284e300 R15: 0000000000022000 irq event stamp: 780 hardirqs last enabled at (779): [] syscall_enter_from_user_mode+0x1d/0x50 hardirqs last disabled at (780): [] __schedule+0x1225/0x2470 softirqs last enabled at (620): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (539): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- syz-executor.0 (3952) used greatest stack depth: 24344 bytes left loop3: detected capacity change from 0 to 114 SELinux: security_context_str_to_sid (unconfined_u) failed with errno=-22 loop3: detected capacity change from 0 to 8 FAT-fs (loop3): Unrecognized mount option "nnonumtail=1" or missing value Process accounting resumed Process accounting resumed loop3: detected capacity change from 0 to 114 SELinux: security_context_str_to_sid (unconfined_u) failed with errno=-22 loop3: detected capacity change from 0 to 8 FAT-fs (loop3): Unrecognized mount option "nnonumtail=1" or missing value Process accounting resumed loop3: detected capacity change from 0 to 114 SELinux: security_context_str_to_sid (unconfined_u) failed with errno=-22 loop3: detected capacity change from 0 to 8 FAT-fs (loop3): Unrecognized mount option "nnonumtail=1" or missing value hrtimer: interrupt took 18965 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 loop4: detected capacity change from 0 to 8 FAT-fs (loop4): Unrecognized mount option "audit" or missing value loop4: detected capacity change from 0 to 16383 ======================================================= 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. ======================================================= loop4: detected capacity change from 0 to 8 FAT-fs (loop4): Unrecognized mount option "audit" or missing value loop4: detected capacity change from 0 to 16383 loop4: detected capacity change from 0 to 8 FAT-fs (loop4): Unrecognized mount option "audit" or missing value loop4: detected capacity change from 0 to 16383 loop4: detected capacity change from 0 to 8 FAT-fs (loop4): Unrecognized mount option "audit" or missing value loop4: detected capacity change from 0 to 16383 audit: type=1326 audit(1663676745.356:9): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4249 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f655f378b19 code=0x0 loop4: detected capacity change from 0 to 8 audit: type=1326 audit(1663676745.457:10): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4249 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f655f378b19 code=0x0 FAT-fs (loop4): Unrecognized mount option "audit" or missing value loop4: detected capacity change from 0 to 16383 audit: type=1401 audit(1663676746.853:11): op=setxattr invalid_context="" loop4: detected capacity change from 0 to 264192 audit: type=1400 audit(1663676747.711:12): avc: denied { write } for pid=4383 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 Bluetooth: MGMT ver 1.22 loop4: detected capacity change from 0 to 264192 loop1: detected capacity change from 0 to 264192 loop3: detected capacity change from 0 to 264192 loop1: detected capacity change from 0 to 264192 loop3: detected capacity change from 0 to 264192 loop4: detected capacity change from 0 to 264192 EXT4-fs (loop7): VFS: Can't find ext4 filesystem EXT4-fs (loop7): VFS: Can't find ext4 filesystem loop3: detected capacity change from 0 to 264192 netlink: 4612 bytes leftover after parsing attributes in process `syz-executor.7'. loop1: detected capacity change from 0 to 264192