audit: type=1400 audit(1663155855.157:9): avc: denied { read } for pid=3779 comm="syz-executor.2" 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-20220914 #1 Not tainted ------------------------------------------------------ syz-executor.2/3784 is trying to acquire lock: ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70 but task is already holding lock: ffff88800e3fd420 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_in+0x2a0/0x6e0 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 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 event_filter_match+0x422/0x660 merge_sched_in+0x107/0x1110 visit_groups_merge.constprop.0.isra.0+0x4fc/0xef0 ctx_sched_in+0x2e6/0x770 perf_event_sched_in+0x58/0x80 __perf_event_task_sched_in+0x408/0x6e0 finish_task_switch.isra.0+0x46d/0x8a0 __schedule+0x89b/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 unmap_page_range+0xd89/0x2a10 unmap_single_vma+0x190/0x350 unmap_vmas+0x21e/0x370 exit_mmap+0x154/0x680 mmput+0xd1/0x390 do_exit+0xa2e/0x27f0 do_group_exit+0xd0/0x2a0 get_signal+0x219a/0x22d0 arch_do_signal_or_restart+0x89/0x1be0 exit_to_user_mode_prepare+0x131/0x1a0 syscall_exit_to_user_mode+0x19/0x40 do_syscall_64+0x48/0x90 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 *** 3 locks held by syz-executor.2/3784: #0: ffff88803ea6e358 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mmap+0xe5/0x680 #1: ffff88806ce3ef20 (&cpuctx_lock){....}-{2:2}, at: __perf_event_task_sched_in+0x28f/0x6e0 #2: ffff88800e3fd420 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_in+0x2a0/0x6e0 stack backtrace: CPU: 0 PID: 3784 Comm: syz-executor.2 Not tainted 6.0.0-rc5-next-20220914 #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:event_filter_match+0x422/0x660 Code: 00 00 00 e9 7c fc ff ff e8 4b 15 f1 ff 65 8b 2d c0 73 ad 7e 31 ff 89 ee e8 eb 11 f1 ff 85 ed 0f 84 ef 00 00 00 e8 2e 15 f1 ff <0f> 0b eb 9f e8 25 80 23 00 e9 17 fc ff ff e8 1b 15 f1 ff 48 8d 7b RSP: 0018:ffff88803e23f180 EFLAGS: 00010012 RAX: 0000000040000000 RBX: ffff88803ef285c8 RCX: 0000000000000000 RDX: ffff88801b978000 RSI: ffffffff81550212 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865ac01b R12: ffff88803ef287e8 R13: 0000000000000000 R14: ffff88803ef28670 R15: ffff88803ef287e8 merge_sched_in+0x107/0x1110 visit_groups_merge.constprop.0.isra.0+0x4fc/0xef0 ctx_sched_in+0x2e6/0x770 perf_event_sched_in+0x58/0x80 __perf_event_task_sched_in+0x408/0x6e0 finish_task_switch.isra.0+0x46d/0x8a0 __schedule+0x89b/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 unmap_page_range+0xd89/0x2a10 unmap_single_vma+0x190/0x350 unmap_vmas+0x21e/0x370 exit_mmap+0x154/0x680 mmput+0xd1/0x390 do_exit+0xa2e/0x27f0 do_group_exit+0xd0/0x2a0 get_signal+0x219a/0x22d0 arch_do_signal_or_restart+0x89/0x1be0 exit_to_user_mode_prepare+0x131/0x1a0 syscall_exit_to_user_mode+0x19/0x40 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0646920b19 Code: Unable to access opcode bytes at RIP 0x7f0646920aef. RSP: 002b:00007f0643e96218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f0646a33f68 RCX: 00007f0646920b19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0646a33f68 RBP: 00007f0646a33f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0646a33f6c R13: 00007ffd9d4239df R14: 00007f0643e96300 R15: 0000000000022000 WARNING: CPU: 0 PID: 3784 at kernel/events/core.c:2233 event_filter_match+0x422/0x660 Modules linked in: CPU: 0 PID: 3784 Comm: syz-executor.2 Not tainted 6.0.0-rc5-next-20220914 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:event_filter_match+0x422/0x660 Code: 00 00 00 e9 7c fc ff ff e8 4b 15 f1 ff 65 8b 2d c0 73 ad 7e 31 ff 89 ee e8 eb 11 f1 ff 85 ed 0f 84 ef 00 00 00 e8 2e 15 f1 ff <0f> 0b eb 9f e8 25 80 23 00 e9 17 fc ff ff e8 1b 15 f1 ff 48 8d 7b RSP: 0018:ffff88803e23f180 EFLAGS: 00010012 RAX: 0000000040000000 RBX: ffff88803ef285c8 RCX: 0000000000000000 RDX: ffff88801b978000 RSI: ffffffff81550212 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865ac01b R12: ffff88803ef287e8 R13: 0000000000000000 R14: ffff88803ef28670 R15: ffff88803ef287e8 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f301f27f028 CR3: 0000000009b5a000 CR4: 0000000000350ef0 Call Trace: merge_sched_in+0x107/0x1110 visit_groups_merge.constprop.0.isra.0+0x4fc/0xef0 ctx_sched_in+0x2e6/0x770 perf_event_sched_in+0x58/0x80 __perf_event_task_sched_in+0x408/0x6e0 finish_task_switch.isra.0+0x46d/0x8a0 __schedule+0x89b/0x2470 preempt_schedule_common+0x45/0xc0 __cond_resched+0x17/0x30 unmap_page_range+0xd89/0x2a10 unmap_single_vma+0x190/0x350 unmap_vmas+0x21e/0x370 exit_mmap+0x154/0x680 mmput+0xd1/0x390 do_exit+0xa2e/0x27f0 do_group_exit+0xd0/0x2a0 get_signal+0x219a/0x22d0 arch_do_signal_or_restart+0x89/0x1be0 exit_to_user_mode_prepare+0x131/0x1a0 syscall_exit_to_user_mode+0x19/0x40 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0646920b19 Code: Unable to access opcode bytes at RIP 0x7f0646920aef. RSP: 002b:00007f0643e96218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f0646a33f68 RCX: 00007f0646920b19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0646a33f68 RBP: 00007f0646a33f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0646a33f6c R13: 00007ffd9d4239df R14: 00007f0643e96300 R15: 0000000000022000 irq event stamp: 2390 hardirqs last enabled at (2389): [] asm_sysvec_apic_timer_interrupt+0x16/0x20 hardirqs last disabled at (2390): [] __schedule+0x1225/0x2470 softirqs last enabled at (2388): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (2383): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- syz-executor.2 (3784) used greatest stack depth: 23936 bytes left loop5: detected capacity change from 0 to 4728 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop0: detected capacity change from 0 to 11 nfs: Unknown parameter 'NLBL_UNLBL' loop0: detected capacity change from 0 to 11 nfs: Unknown parameter 'NLBL_UNLBL' loop3: detected capacity change from 0 to 40 loop0: detected capacity change from 0 to 11 loop5: detected capacity change from 0 to 4728 ISO 9660 Extensions: Microsoft Joliet Level 3 nfs: Unknown parameter 'NLBL_UNLBL' ISOFS: changing to secondary root loop3: detected capacity change from 0 to 40 loop3: detected capacity change from 0 to 40 loop5: detected capacity change from 0 to 4728 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop0: detected capacity change from 0 to 11 nfs: Unknown parameter 'NLBL_UNLBL' loop2: detected capacity change from 0 to 40 loop3: detected capacity change from 0 to 40 loop5: detected capacity change from 0 to 4728 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root loop0: detected capacity change from 0 to 11 nfs: Unknown parameter 'NLBL_UNLBL' loop2: detected capacity change from 0 to 40 loop2: detected capacity change from 0 to 40 hrtimer: interrupt took 19567 ns audit: type=1326 audit(1663155859.931:10): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4222 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f0646920b19 code=0x0 audit: type=1326 audit(1663155860.765:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4222 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f0646920b19 code=0x0 audit: type=1326 audit(1663155860.938:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4255 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f0646920b19 code=0x0 audit: type=1326 audit(1663155861.083:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4275 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fdc6d964b19 code=0x0 audit: type=1326 audit(1663155861.959:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4303 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f0646920b19 code=0x0 audit: type=1326 audit(1663155861.970:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4301 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fdc6d964b19 code=0x0 audit: type=1326 audit(1663155862.171:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4322 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f173745ab19 code=0x0 audit: type=1326 audit(1663155862.200:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4325 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f2882227b19 code=0x0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 audit: type=1326 audit(1663155862.875:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4351 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f0646920b19 code=0x0 audit: type=1326 audit(1663155862.912:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4355 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fdc6d964b19 code=0x0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 audit: type=1326 audit(1663155863.789:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4376 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f173745ab19 code=0x0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0