audit: type=1400 audit(1664210347.687:8): avc: denied { kernel } for pid=3841 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 29946 ns ------------[ cut here ]------------ ====================================================== WARNING: possible circular locking dependency detected 6.0.0-rc6-next-20220923 #1 Not tainted ------------------------------------------------------ syz-executor.5/3847 is trying to acquire lock: ffffffff853faaf8 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0xe/0x70 but task is already holding lock: ffff888020495820 (&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+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 vprintk_emit+0x1bd/0x560 vprintk+0x84/0xa0 _printk+0xba/0xf1 kauditd_hold_skb.cold+0x3f/0x4e kauditd_send_queue+0x233/0x290 kauditd_thread+0x5da/0x9a0 kthread+0x2ed/0x3a0 ret_from_fork+0x22/0x30 -> #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.5/3847: #0: ffff88806ce37d18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470 #1: ffff888020495820 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0 stack backtrace: CPU: 0 PID: 3847 Comm: syz-executor.5 Not tainted 6.0.0-rc6-next-20220923 #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 5b bb ef ff e8 56 bb ef ff 65 8b 1d 1b 26 ac 7e 31 ff 89 de e8 f6 b7 ef ff 85 db 0f 84 8a 00 00 00 e8 39 bb ef ff <0f> 0b e9 a5 fe ff ff e8 2d bb ef ff 48 8d 7d 10 48 b8 00 00 00 00 RSP: 0018:ffff888017e67978 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888015f7d040 RSI: ffffffff81564fb7 RDI: 0000000000000005 RBP: ffff888008668b90 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888020495800 R13: ffff88806ce3d140 R14: ffffffff8547c9a0 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: 0033:0x7f4133e20b19 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:00007f4131375188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f4133f34020 RCX: 00007f4133e20b19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000280 RBP: 00007f4133e7af6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffca8059fff R14: 00007f4131375300 R15: 0000000000022000 WARNING: CPU: 0 PID: 3847 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460 Modules linked in: CPU: 0 PID: 3847 Comm: syz-executor.5 Not tainted 6.0.0-rc6-next-20220923 #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 5b bb ef ff e8 56 bb ef ff 65 8b 1d 1b 26 ac 7e 31 ff 89 de e8 f6 b7 ef ff 85 db 0f 84 8a 00 00 00 e8 39 bb ef ff <0f> 0b e9 a5 fe ff ff e8 2d bb ef ff 48 8d 7d 10 48 b8 00 00 00 00 RSP: 0018:ffff888017e67978 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888015f7d040 RSI: ffffffff81564fb7 RDI: 0000000000000005 RBP: ffff888008668b90 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888020495800 R13: ffff88806ce3d140 R14: ffffffff8547c9a0 R15: 0000000000000002 FS: 00007f4131375700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005653393b99a0 CR3: 00000000175ee000 CR4: 0000000000350ef0 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: 0033:0x7f4133e20b19 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:00007f4131375188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f4133f34020 RCX: 00007f4133e20b19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000280 RBP: 00007f4133e7af6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffca8059fff R14: 00007f4131375300 R15: 0000000000022000 irq event stamp: 936 hardirqs last enabled at (935): [] asm_sysvec_apic_timer_interrupt+0x16/0x20 hardirqs last disabled at (936): [] __schedule+0x1225/0x2470 softirqs last enabled at (906): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (101): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 40 00 00 02 00 I/O error, dev sr0, sector 256 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 256 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 256, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 257 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 257, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 258 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 258, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 259 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 259, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 260 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 260, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 261 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 261, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 262 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 262, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 263 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 263, async page read audit: type=1400 audit(1664210349.977:9): avc: denied { write } for pid=3946 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 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 40 00 00 02 00 I/O error, dev sr0, sector 256 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 40 00 sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev sr0, logical block 0, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev sr0, logical block 1, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 40 00 Bluetooth: hci3: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci3: unexpected cc 0x1003 length: 249 > 9 Bluetooth: hci3: unexpected cc 0x1001 length: 249 > 9 Bluetooth: hci5: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci5: unexpected cc 0x1003 length: 249 > 9 Bluetooth: hci3: unexpected cc 0x0c23 length: 249 > 4 Bluetooth: hci3: unexpected cc 0x0c25 length: 249 > 3 Bluetooth: hci3: unexpected cc 0x0c38 length: 249 > 2 Bluetooth: hci3: HCI_REQ-0x0c1a Bluetooth: hci5: unexpected cc 0x1001 length: 249 > 9 Bluetooth: hci1: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci1: unexpected cc 0x1003 length: 249 > 9 Bluetooth: hci1: unexpected cc 0x1001 length: 249 > 9 Bluetooth: hci1: unexpected cc 0x0c23 length: 249 > 4 Bluetooth: hci1: unexpected cc 0x0c25 length: 249 > 3 Bluetooth: hci1: unexpected cc 0x0c38 length: 249 > 2 Bluetooth: hci1: HCI_REQ-0x0c1a Bluetooth: hci5: unexpected cc 0x0c23 length: 249 > 4 Bluetooth: hci6: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci6: unexpected cc 0x1003 length: 249 > 9 Bluetooth: hci5: unexpected cc 0x0c25 length: 249 > 3 Bluetooth: hci6: unexpected cc 0x1001 length: 249 > 9 Bluetooth: hci5: unexpected cc 0x0c38 length: 249 > 2 Bluetooth: hci5: HCI_REQ-0x0c1a Bluetooth: hci6: unexpected cc 0x0c23 length: 249 > 4 Bluetooth: hci6: unexpected cc 0x0c25 length: 249 > 3 Bluetooth: hci6: unexpected cc 0x0c38 length: 249 > 2 Bluetooth: hci6: HCI_REQ-0x0c1a Bluetooth: hci0: Opcode 0x c03 failed: -110 Bluetooth: hci3: command 0x0409 tx timeout Bluetooth: hci7: Opcode 0x c03 failed: -110 Bluetooth: hci1: command 0x0409 tx timeout Bluetooth: hci5: command 0x0409 tx timeout Bluetooth: hci6: command 0x0409 tx timeout Bluetooth: hci3: command 0x041b tx timeout Bluetooth: hci1: command 0x041b tx timeout Bluetooth: hci5: command 0x041b tx timeout Bluetooth: hci6: command 0x041b tx timeout