audit: type=1400 audit(1664896425.870:8): avc: denied { kernel } for pid=3948 comm="syz-executor.4" 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-next-20221004 #1 Not tainted ------------------------------------------------------ syz-executor.4/3949 is trying to acquire lock: ffffffff853faaf8 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70 but task is already holding lock: ffff88800e805820 (&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+0x4c6/0x4eb 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 regdb_fw_cb.cold+0x6c/0xa7 request_firmware_work_func+0x12e/0x240 process_one_work+0xa17/0x16a0 worker_thread+0x637/0x1260 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.4/3949: #0: ffff88806ce37e98 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470 #1: ffff88800e805820 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0 stack backtrace: CPU: 0 PID: 3949 Comm: syz-executor.4 Not tainted 6.0.0-next-20221004 #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 8b ae ef ff e8 86 ae ef ff 65 8b 1d 2b 08 ac 7e 31 ff 89 de e8 26 ab ef ff 85 db 0f 84 8a 00 00 00 e8 69 ae ef ff <0f> 0b e9 a5 fe ff ff e8 5d ae ef ff 48 8d 7d 10 48 b8 00 00 00 00 RSP: 0018:ffff88801769fc48 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88801015d040 RSI: ffffffff81566da7 RDI: 0000000000000005 RBP: ffff888008660000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865b601b R12: ffff88800e805800 R13: ffff88806ce3d2c0 R14: ffffffff8547d040 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: 0033:0x7f5210033b19 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:00007f520d5a9218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f5210146f68 RCX: 00007f5210033b19 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f5210146f6c RBP: 00007f5210146f60 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 00007f5210146f6c R13: 00007fff1d10a1df R14: 00007f520d5a9300 R15: 0000000000022000 WARNING: CPU: 0 PID: 3949 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460 Modules linked in: CPU: 0 PID: 3949 Comm: syz-executor.4 Not tainted 6.0.0-next-20221004 #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 8b ae ef ff e8 86 ae ef ff 65 8b 1d 2b 08 ac 7e 31 ff 89 de e8 26 ab ef ff 85 db 0f 84 8a 00 00 00 e8 69 ae ef ff <0f> 0b e9 a5 fe ff ff e8 5d ae ef ff 48 8d 7d 10 48 b8 00 00 00 00 RSP: 0018:ffff88801769fc48 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88801015d040 RSI: ffffffff81566da7 RDI: 0000000000000005 RBP: ffff888008660000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865b601b R12: ffff88800e805800 R13: ffff88806ce3d2c0 R14: ffffffff8547d040 R15: 0000000000000002 FS: 00007f520d5a9700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f28cb93e820 CR3: 0000000015f3a000 CR4: 0000000000350ef0 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: 0033:0x7f5210033b19 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:00007f520d5a9218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f5210146f68 RCX: 00007f5210033b19 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f5210146f6c RBP: 00007f5210146f60 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 00007f5210146f6c R13: 00007fff1d10a1df R14: 00007f520d5a9300 R15: 0000000000022000 irq event stamp: 838 hardirqs last enabled at (837): [] exit_to_user_mode_prepare+0x109/0x1a0 hardirqs last disabled at (838): [] __schedule+0x1225/0x2470 softirqs last enabled at (698): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (679): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1664896426.074:9): avc: denied { module_load } for pid=3948 comm="syz-executor.4" path=2F6D656D66643A42DB2F89036CDE62CBB534EDBE4C4BA4673F4B29A0F09B3859B55AE11253F547CCF3E902680BCA2896E143DF1CEA8543FB1013FA0316CD05202864656C6574656429 dev="hugetlbfs" ino=14637 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:hugetlbfs_t:s0 tclass=system permissive=1 Invalid ELF header magic: != ELF device syz_tun entered promiscuous mode Invalid ELF header magic: != ELF device syz_tun left promiscuous mode device syz_tun entered promiscuous mode device syz_tun left promiscuous mode device syz_tun entered promiscuous mode device syz_tun entered promiscuous mode device syz_tun left promiscuous mode Invalid ELF header magic: != ELF device syz_tun left promiscuous mode device syz_tun entered promiscuous mode device syz_tun left promiscuous mode device syz_tun entered promiscuous mode device syz_tun entered promiscuous mode hrtimer: interrupt took 16942 ns device syz_tun left promiscuous mode device syz_tun left promiscuous mode device syz_tun entered promiscuous mode Invalid ELF header magic: != ELF device syz_tun left promiscuous mode ieee80211 : Selected rate control algorithm 'minstrel_ht' ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' netlink: 200 bytes leftover after parsing attributes in process `syz-executor.2'. ieee80211 phy4: Selected rate control algorithm 'minstrel_ht' ieee80211 phy5: Selected rate control algorithm 'minstrel_ht' syz-executor.4 (4117) used greatest stack depth: 24792 bytes left ieee80211 phy6: Selected rate control algorithm 'minstrel_ht' loop3: detected capacity change from 0 to 1 FAT-fs (loop3): bogus number of FAT structure FAT-fs (loop3): Can't find a valid FAT filesystem loop3: detected capacity change from 0 to 1 FAT-fs (loop3): bogus number of FAT structure FAT-fs (loop3): Can't find a valid FAT filesystem program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO process 'syz-executor.2' launched '/dev/fd/-1/./file0' with NULL argv: empty string added tmpfs: Unknown parameter 'subj_role' tmpfs: Unknown parameter 'subj_role' program syz-executor.3 is using a deprecated SCSI ioctl, please convert it to SG_IO device lo entered promiscuous mode syz-executor.4 uses obsolete (PF_INET,SOCK_PACKET) device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode Bluetooth: Unexpected continuation frame (len 11) Bluetooth: hci4: Malformed Event: 0x02 Bluetooth: Unexpected continuation frame (len 11) Bluetooth: hci4: Malformed Event: 0x02 device lo left promiscuous mode Bluetooth: Unexpected continuation frame (len 11) Bluetooth: hci4: Malformed Event: 0x02 device lo left promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode device lo entered promiscuous mode netlink: 'syz-executor.0': attribute type 58 has an invalid length. netlink: 'syz-executor.0': attribute type 58 has an invalid length. Bluetooth: Unexpected continuation frame (len 11) Bluetooth: hci4: Malformed Event: 0x02 netlink: 'syz-executor.0': attribute type 58 has an invalid length. Bluetooth: Unexpected continuation frame (len 11) Bluetooth: hci4: Malformed Event: 0x02 netlink: 'syz-executor.0': attribute type 58 has an invalid length. FAT-fs (loop2): Unrecognized mount option "smackfshat=" or missing value FAT-fs (loop2): Unrecognized mount option "smackfshat=" or missing value FAT-fs (loop2): Unrecognized mount option "smackfshat=" or missing value