------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] ep_poll+0x147a/0x1e80 fs/eventpoll.c:1834 WARNING: CPU: 0 PID: 3853 at kernel/sched/core.c:9660 __might_sleep+0xb0/0xe0 kernel/sched/core.c:9656 Modules linked in: CPU: 0 PID: 3853 Comm: udevd Tainted: G W 5.17.0-syzkaller-13430-g787af64d05cd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__might_sleep+0xb0/0xe0 kernel/sched/core.c:9656 Code: b0 0c 01 42 80 3c 23 00 74 08 48 89 ef e8 d8 d5 7a 00 48 8b 4d 00 48 c7 c7 80 b6 8e 8a 44 89 ee 48 89 ca 31 c0 e8 50 b2 f2 ff <0f> 0b eb b7 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 72 ff ff ff 48 89 RSP: 0018:ffffc90000007b38 EFLAGS: 00010246 RAX: 255c5de2e0117b00 RBX: 1ffff1100550167e RCX: ffff88802a809d00 RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000 RBP: ffff88802a80b3f0 R08: ffffffff816b4962 R09: fffff52000000eb9 R10: fffff52000000eb9 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 00000000000002fe R15: ffffffff8c6b5bf2 FS: 00007fe672ea4840(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8467d6c058 CR3: 000000001c6ae000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: blk_release_queue+0x2e/0x2a0 block/blk-sysfs.c:766 kobject_cleanup+0x1c0/0x280 lib/kobject.c:705 blkg_free+0x2d0/0x320 block/blk-cgroup.c:86 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0xa85/0x1700 kernel/rcu/tree.c:2786 __do_softirq+0x392/0x7a3 kernel/softirq.c:558 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 RIP: 0010:schedule_hrtimeout_range_clock+0x2af/0x470 kernel/time/hrtimer.c:2296 Code: a3 4a f7 89 c3 31 ff 89 c6 e8 dd f6 5b f7 85 db 0f 88 9b 00 00 00 e8 c0 f2 5b f7 48 bb 00 00 00 00 00 fc ff df e9 ab 00 00 00 ac f2 5b f7 e8 c7 00 ff ff b8 fc ff ff ff e9 19 01 00 00 e8 98 RSP: 0018:ffffc900048ffa60 EFLAGS: 00000246 RAX: ffffc900048ffac0 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000048 RSI: 0000000000000000 RDI: ffffc900048ffb08 RBP: ffffc900048ffb90 R08: dffffc0000000000 R09: ffffc900048ffac0 R10: fffff5200091ff61 R11: 0000000000000000 R12: ffffc900048ffac0 R13: 0000000000000001 R14: 0000000000000000 R15: 1ffff9200091ff54 ep_poll+0x1bff/0x1e80 fs/eventpoll.c:1856 do_epoll_wait+0x196/0x210 fs/eventpoll.c:2234 __do_sys_epoll_wait fs/eventpoll.c:2246 [inline] __se_sys_epoll_wait fs/eventpoll.c:2241 [inline] __x64_sys_epoll_wait+0x307/0x350 fs/eventpoll.c:2241 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe672b33e46 Code: 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 e8 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 18 48 89 74 24 RSP: 002b:00007ffe9c1dc438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe672b33e46 RDX: 0000000000000004 RSI: 00007ffe9c1dc478 RDI: 0000000000000004 RBP: 000055dfb0c71be0 R08: 0000000000000007 R09: 000055dfb0c55aa0 R10: 00000000ffffffff R11: 0000000000000246 R12: 000055dfb0c76100 R13: 00007ffe9c1dc478 R14: 0000000000000008 R15: 000055dfb0c4c910 ---------------- Code disassembly (best guess): 0: a3 4a f7 89 c3 31 ff movabs %eax,0xc689ff31c389f74a 7: 89 c6 9: e8 dd f6 5b f7 callq 0xf75bf6eb e: 85 db test %ebx,%ebx 10: 0f 88 9b 00 00 00 js 0xb1 16: e8 c0 f2 5b f7 callq 0xf75bf2db 1b: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx 22: fc ff df 25: e9 ab 00 00 00 jmpq 0xd5 * 2a: e8 ac f2 5b f7 callq 0xf75bf2db <-- trapping instruction 2f: e8 c7 00 ff ff callq 0xffff00fb 34: b8 fc ff ff ff mov $0xfffffffc,%eax 39: e9 19 01 00 00 jmpq 0x157 3e: e8 .byte 0xe8 3f: 98 cwtl