BUG: sleeping function called from invalid context at block/blk-sysfs.c:766 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2962, name: udevd preempt_count: 100, expected: 0 RCU nest depth: 0, expected: 0 INFO: lockdep is turned off. Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:396 [inline] [] __do_softirq+0xe1/0x9c2 kernel/softirq.c:534 CPU: 1 PID: 2962 Comm: udevd Tainted: G W 5.17.0-syzkaller-13536-ge3d37210df5c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9733 blk_release_queue+0x1f/0x320 block/blk-sysfs.c:766 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:753 blkg_free.part.0+0x112/0x1f0 block/blk-cgroup.c:86 blkg_free block/blk-cgroup.c:78 [inline] __blkg_release+0x105/0x160 block/blk-cgroup.c:102 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x7b1/0x1880 kernel/rcu/tree.c:2786 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0xc/0x70 kernel/kcov.c:286 Code: 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 5b c3 0f 1f 80 00 00 00 00 41 89 f8 bf 03 00 00 00 4c 8b 14 24 <89> f1 65 48 8b 34 25 00 70 02 00 e8 74 f9 ff ff 84 c0 74 4b 48 8b RSP: 0018:ffffc90002e4f908 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 1ffff920005c9f23 RCX: 0000000000000000 RDX: ffff88807e175700 RSI: 0000000000000002 RDI: 0000000000000003 RBP: ffffc90002e4fc40 R08: 0000000000000000 R09: ffff888010c674df R10: ffffffff81d59c52 R11: 0000000000000000 R12: ffff88807905e8d0 R13: 0000000000000002 R14: 0000000000000002 R15: 0000000502df22f4 walk_component+0x112/0x6a0 fs/namei.c:2024 link_path_walk.part.0+0x7ef/0xf70 fs/namei.c:2347 link_path_walk fs/namei.c:2272 [inline] path_openat+0x260/0x2910 fs/namei.c:3605 do_filp_open+0x1aa/0x400 fs/namei.c:3636 do_sys_openat2+0x16d/0x4c0 fs/open.c:1213 do_sys_open fs/open.c:1229 [inline] __do_sys_openat fs/open.c:1245 [inline] __se_sys_openat fs/open.c:1240 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1240 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fadab72a5a4 Code: f9 41 89 f0 41 83 e2 40 75 2c 89 f0 25 00 00 41 00 3d 00 00 41 00 74 1e 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2c c3 0f 1f 00 48 8d 44 24 08 c7 44 24 b8 10 RSP: 002b:00007ffd2c97efd8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000055ab7974e630 RCX: 00007fadab72a5a4 RDX: 0000000000090800 RSI: 000055ab7970c7f0 RDI: 00000000ffffff9c RBP: 000055ab79752e40 R08: 0000000000090800 R09: 000055ab7970c7f0 R10: 0000000000000000 R11: 0000000000000287 R12: 000055ab7970c7f0 R13: 00000000000000ff R14: 00007ffd2c97f030 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 48 89 add %cl,-0x77(%rax) 5: 7c 30 jl 0x37 7: e8 48 89 4c 30 callq 0x304c8954 c: f0 4c 89 54 d8 20 lock mov %r10,0x20(%rax,%rbx,8) 12: 48 89 10 mov %rdx,(%rax) 15: 5b pop %rbx 16: c3 retq 17: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 1e: 41 89 f8 mov %edi,%r8d 21: bf 03 00 00 00 mov $0x3,%edi 26: 4c 8b 14 24 mov (%rsp),%r10 * 2a: 89 f1 mov %esi,%ecx <-- trapping instruction 2c: 65 48 8b 34 25 00 70 mov %gs:0x27000,%rsi 33: 02 00 35: e8 74 f9 ff ff callq 0xfffff9ae 3a: 84 c0 test %al,%al 3c: 74 4b je 0x89 3e: 48 rex.W 3f: 8b .byte 0x8b