audit: type=1400 audit(1663013401.487:8): avc: denied { kernel } for pid=3791 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-20220912 #1 Not tainted ------------------------------------------------------ syz-executor.2/3793 is trying to acquire lock: ffffffff853fa878 ((console_sem).lock){....}-{2:2}, at: down_trylock+0xe/0x70 but task is already holding lock: ffff888008f80c20 (&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+0x3f9e/0x6df0 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 vt_ioctl+0x2822/0x2ca0 tty_ioctl+0x7c4/0x1700 __x64_sys_ioctl+0x19a/0x210 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 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.2/3793: #0: ffff88806ce37cd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x1cf/0x2470 #1: ffff888008f80c20 (&ctx->lock){....}-{2:2}, at: __perf_event_task_sched_out+0x53b/0x18d0 stack backtrace: CPU: 0 PID: 3793 Comm: syz-executor.2 Not tainted 6.0.0-rc5-next-20220912 #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:ffff88801b97fc48 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8880426e1ac0 RSI: ffffffff81566027 RDI: 0000000000000005 RBP: ffff8880086605c8 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865aa01b R12: ffff888008f80c00 R13: ffff88806ce3d100 R14: ffffffff8547c7c0 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: 0033:0x7fd478c79b19 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:00007fd4761ef218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007fd478d8cf68 RCX: 00007fd478c79b19 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fd478d8cf6c RBP: 00007fd478d8cf60 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00007fd478d8cf6c R13: 00007fffbcb64abf R14: 00007fd4761ef300 R15: 0000000000022000 WARNING: CPU: 0 PID: 3793 at kernel/events/core.c:2309 group_sched_out.part.0+0x2c7/0x460 Modules linked in: CPU: 0 PID: 3793 Comm: syz-executor.2 Not tainted 6.0.0-rc5-next-20220912 #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:ffff88801b97fc48 EFLAGS: 00010006 RAX: 0000000040000002 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8880426e1ac0 RSI: ffffffff81566027 RDI: 0000000000000005 RBP: ffff8880086605c8 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: ffffffff865aa01b R12: ffff888008f80c00 R13: ffff88806ce3d100 R14: ffffffff8547c7c0 R15: 0000000000000002 FS: 00007fd4761ef700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f67b1ed6028 CR3: 000000003cf3e000 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: 0033:0x7fd478c79b19 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:00007fd4761ef218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007fd478d8cf68 RCX: 00007fd478c79b19 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fd478d8cf6c RBP: 00007fd478d8cf60 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00007fd478d8cf6c R13: 00007fffbcb64abf R14: 00007fd4761ef300 R15: 0000000000022000 irq event stamp: 622 hardirqs last enabled at (621): [] exit_to_user_mode_prepare+0x109/0x1a0 hardirqs last disabled at (622): [] __schedule+0x1225/0x2470 softirqs last enabled at (330): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (299): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 syz-executor.2 (3846) used greatest stack depth: 23968 bytes left platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 loop2: detected capacity change from 0 to 63335 SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22 audit: type=1400 audit(1663013402.426:9): avc: denied { relabelto } for pid=3874 comm="syz-executor.3" name="HCI" dev="sockfs" ino=13894 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:watchdog_device_t:s0 tclass=bluetooth_socket permissive=1 loop2: detected capacity change from 0 to 63335 SELinux: security_context_str_to_sid (sysadm_u) failed with errno=-22 loop2: detected capacity change from 0 to 256 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) netlink: 'syz-executor.0': attribute type 12 has an invalid length. hrtimer: interrupt took 16581 ns loop2: detected capacity change from 0 to 264192 loop2: detected capacity change from 0 to 264192 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=0 sclass=netlink_audit_socket pid=4158 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=0 sclass=netlink_audit_socket pid=4161 comm=syz-executor.0 loop2: detected capacity change from 0 to 264192 sit: non-ECT from 0.0.0.156 with TOS=0x2 sit: non-ECT from 0.0.0.156 with TOS=0x2 loop4: detected capacity change from 0 to 40 audit: type=1326 audit(1663013407.631:10): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4198 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7faf8f092b19 code=0x0 loop2: detected capacity change from 0 to 264192 ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' 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 audit: type=1326 audit(1663013408.458:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4198 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7faf8f092b19 code=0x0 loop4: detected capacity change from 0 to 40 ieee80211 phy4: Selected rate control algorithm 'minstrel_ht' audit: type=1326 audit(1663013408.679:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4245 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7faf8f092b19 code=0x0 audit: type=1326 audit(1663013408.748:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4251 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7feb74e45b19 code=0x0 audit: type=1326 audit(1663013408.753:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4249 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fd478c79b19 code=0x0 audit: type=1326 audit(1663013408.756:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4250 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f5237a68b19 code=0x0 ieee80211 phy5: Selected rate control algorithm 'minstrel_ht' loop6: detected capacity change from 0 to 40 syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 ieee80211 phy6: Selected rate control algorithm 'minstrel_ht' Buffer I/O error on dev loop4, logical block 10, lost async page write syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop6, logical block 10, lost async page write loop4: detected capacity change from 0 to 40 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 loop4: detected capacity change from 0 to 40 audit: type=1326 audit(1663013409.656:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4273 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7faf8f092b19 code=0x0 audit: type=1326 audit(1663013409.668:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4276 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7feb74e45b19 code=0x0 audit: type=1326 audit(1663013409.681:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4278 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fd478c79b19 code=0x0 audit: type=1326 audit(1663013409.704:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4282 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f5237a68b19 code=0x0 loop6: detected capacity change from 0 to 40 syz-executor.6: attempt to access beyond end of device loop6: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop6, logical block 10, lost async page write 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 loop6: detected capacity change from 0 to 40 random: crng reseeded on system resumption random: crng reseeded on system resumption