audit: type=1400 audit(1663329638.128:8): avc: denied { kernel } for pid=3852 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-20220916 #1 Not tainted ------------------------------------------------------ syz-executor.0/3853 is trying to acquire lock: ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70 but task is already holding lock: ffff88800b25ec20 (&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 exit_to_user_mode_prepare+0x114/0x1a0 syscall_exit_to_user_mode+0x19/0x40 do_syscall_64+0x48/0x90 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 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 exit_to_user_mode_prepare+0x114/0x1a0 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 *** 2 locks held by syz-executor.0/3853: #0: ffff88806cf37cd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470 #1: ffff88800b25ec20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0 stack backtrace: CPU: 1 PID: 3853 Comm: syz-executor.0 Not tainted 6.0.0-rc5-next-20220916 #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:ffff88803de27c48 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888017c83580 RSI: ffffffff81566027 RDI: 0000000000000005 RBP: ffff8880204f0000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800b25ec00 R13: ffff88806cf3d100 R14: ffffffff8547bfc0 R15: 0000000000000002 ctx_sched_out+0x8f1/0xc10 __perf_event_task_sched_out+0x6d0/0x18d0 __schedule+0xedd/0x2470 schedule+0xda/0x1b0 exit_to_user_mode_prepare+0x114/0x1a0 syscall_exit_to_user_mode+0x19/0x40 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb4886e3b19 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:00007fb485c59218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007fb4887f6f68 RCX: 00007fb4886e3b19 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fb4887f6f6c RBP: 00007fb4887f6f60 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00007fb4887f6f6c R13: 00007ffc930ef13f R14: 00007fb485c59300 R15: 0000000000022000 WARNING: CPU: 1 PID: 3853 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460 Modules linked in: CPU: 1 PID: 3853 Comm: syz-executor.0 Not tainted 6.0.0-rc5-next-20220916 #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:ffff88803de27c48 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888017c83580 RSI: ffffffff81566027 RDI: 0000000000000005 RBP: ffff8880204f0000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800b25ec00 R13: ffff88806cf3d100 R14: ffffffff8547bfc0 R15: 0000000000000002 FS: 00007fb485c59700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcc40b8a438 CR3: 000000003e264000 CR4: 0000000000350ee0 Call Trace: ctx_sched_out+0x8f1/0xc10 __perf_event_task_sched_out+0x6d0/0x18d0 __schedule+0xedd/0x2470 schedule+0xda/0x1b0 exit_to_user_mode_prepare+0x114/0x1a0 syscall_exit_to_user_mode+0x19/0x40 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb4886e3b19 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:00007fb485c59218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007fb4887f6f68 RCX: 00007fb4886e3b19 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fb4887f6f6c RBP: 00007fb4887f6f60 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00007fb4887f6f6c R13: 00007ffc930ef13f R14: 00007fb485c59300 R15: 0000000000022000 irq event stamp: 524 hardirqs last enabled at (523): [] exit_to_user_mode_prepare+0x109/0x1a0 hardirqs last disabled at (524): [] __schedule+0x1225/0x2470 softirqs last enabled at (214): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (205): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- process 'syz-executor.4' launched '/dev/fd/-1/./file0' with NULL argv: empty string added hrtimer: interrupt took 19196 ns loop4: detected capacity change from 0 to 40 Invalid option length (422) for dns_resolver key syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 Invalid option length (422) for dns_resolver key Buffer I/O error on dev loop4, logical block 10, lost async page write syz-executor.4 (4027) used greatest stack depth: 24664 bytes left loop4: detected capacity change from 0 to 40 Invalid option length (422) for dns_resolver key syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop4, logical block 10, lost async page write Invalid option length (422) for dns_resolver key loop0: detected capacity change from 0 to 40 syz-executor.4 (4062) used greatest stack depth: 24536 bytes left loop7: detected capacity change from 0 to 40 Invalid option length (422) for dns_resolver key loop4: detected capacity change from 0 to 40 syz-executor.7: attempt to access beyond end of device loop7: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop7, logical block 10, lost async page write syz-executor.0: attempt to access beyond end of device loop0: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop0, logical block 10, lost async page write Invalid option length (422) for dns_resolver key syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop4, logical block 10, lost async page write loop7: detected capacity change from 0 to 40 loop0: detected capacity change from 0 to 40 Invalid option length (422) for dns_resolver key loop4: detected capacity change from 0 to 40 syz-executor.0: attempt to access beyond end of device loop0: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop0, logical block 10, lost async page write audit: type=1400 audit(1663329641.345:9): avc: denied { write } for pid=4098 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 audit: type=1400 audit(1663329641.355:10): avc: denied { setattr } for pid=4098 comm="syz-executor.1" name="oom_adj" dev="proc" ino=14957 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=file permissive=1 syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop4, logical block 10, lost async page write loop0: detected capacity change from 0 to 40 syz-executor.0: attempt to access beyond end of device loop0: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop0, logical block 10, lost async page write loop7: detected capacity change from 0 to 40 syz-executor.7: attempt to access beyond end of device loop7: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop7, logical block 10, lost async page write loop0: detected capacity change from 0 to 264192 FAT-fs (loop0): Unrecognized mount option "000000000000007074530071844674407370955161500000000000000000000004" or missing value loop1: detected capacity change from 0 to 264192 loop4: detected capacity change from 0 to 264192 loop0: detected capacity change from 0 to 264192 FAT-fs (loop1): Unrecognized mount option "000000000000067125130361844674407370955161500000000000000000000004" or missing value FAT-fs (loop4): Unrecognized mount option "000000000000021553035061844674407370955161500000000000000000000004" or missing value FAT-fs (loop0): Unrecognized mount option "000000000000035001037061844674407370955161500000000000000000000004" or missing value loop7: detected capacity change from 0 to 264192 loop1: detected capacity change from 0 to 264192 loop5: detected capacity change from 0 to 264192 FAT-fs (loop7): Unrecognized mount option "000000000000030665437021844674407370955161500000000000000000000004" or missing value FAT-fs (loop1): Unrecognized mount option "000000000000031547105721844674407370955161500000000000000000000004" or missing value loop4: detected capacity change from 0 to 264192 FAT-fs (loop5): Unrecognized mount option "000000000000075260045171844674407370955161500000000000000000000004" or missing value FAT-fs (loop4): Unrecognized mount option "000000000000050365021301844674407370955161500000000000000000000004" or missing value loop0: detected capacity change from 0 to 264192 FAT-fs (loop0): Unrecognized mount option "000000000000061043670131844674407370955161500000000000000000000004" or missing value loop4: detected capacity change from 0 to 264192 FAT-fs (loop4): Unrecognized mount option "000000000000076137144671844674407370955161500000000000000000000004" or missing value loop0: detected capacity change from 0 to 264192 FAT-fs (loop0): Unrecognized mount option "000000000000006422642021844674407370955161500000000000000000000004" or missing value loop3: detected capacity change from 0 to 264192 FAT-fs (loop3): Unrecognized mount option "000000000000075506031551844674407370955161500000000000000000000004" or missing value loop7: detected capacity change from 0 to 264192 FAT-fs (loop7): Unrecognized mount option "000000000000030075014321844674407370955161500000000000000000000004" or missing value loop0: detected capacity change from 0 to 4096 EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. EXT4-fs (loop0): unmounting filesystem. loop1: detected capacity change from 0 to 264192 FAT-fs (loop1): Unrecognized mount option "000000000000011026537671844674407370955161500000000000000000000004" or missing value loop6: detected capacity change from 0 to 264192 loop3: detected capacity change from 0 to 264192 loop5: detected capacity change from 0 to 264192 FAT-fs (loop5): Unrecognized mount option "000000000000027160434511844674407370955161500000000000000000000004" or missing value FAT-fs (loop3): Unrecognized mount option "000000000000022120720511844674407370955161500000000000000000000004" or missing value FAT-fs (loop6): Unrecognized mount option "000000000000075025233571844674407370955161500000000000000000000004" or missing value loop5: detected capacity change from 0 to 264192 loop7: detected capacity change from 0 to 264192 FAT-fs (loop7): Unrecognized mount option "000000000000071456321531844674407370955161500000000000000000000004" or missing value FAT-fs (loop5): Unrecognized mount option "000000000000021213547431844674407370955161500000000000000000000004" or missing value loop3: detected capacity change from 0 to 264192 FAT-fs (loop3): Unrecognized mount option "000000000000062760454331844674407370955161500000000000000000000004" or missing value loop6: detected capacity change from 0 to 264192 FAT-fs (loop6): Unrecognized mount option "000000000000032123222651844674407370955161500000000000000000000004" or missing value loop6: detected capacity change from 0 to 264192 FAT-fs (loop6): Unrecognized mount option "000000000000002134723461844674407370955161500000000000000000000004" or missing value syz-executor.1 (4375) used greatest stack depth: 24152 bytes left