------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] smpboot_thread_fn+0x63/0x9c0 kernel/smpboot.c:112 WARNING: CPU: 0 PID: 15 at kernel/sched/core.c:9656 __might_sleep+0x105/0x150 kernel/sched/core.c:9656 Modules linked in: CPU: 0 PID: 15 Comm: ksoftirqd/0 Tainted: G W 5.17.0-syzkaller-12882-g1930a6e739c4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__might_sleep+0x105/0x150 kernel/sched/core.c:9656 Code: 70 02 00 48 8d bb f0 16 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 75 34 48 8b 93 f0 16 00 00 48 c7 c7 00 df cb 89 e8 92 48 c8 07 <0f> 0b e9 75 ff ff ff e8 2f 29 73 00 e9 26 ff ff ff 89 34 24 e8 32 RSP: 0018:ffffc90000007d68 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff888010e43a00 RCX: 0000000000000000 RDX: ffff888010e43a00 RSI: ffffffff815fcd18 RDI: fffff52000000f9f RBP: ffffffff8a2479c0 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815f76ee R11: 0000000000000000 R12: 00000000000002fe R13: 0000000000000000 R14: ffffffff8a247dc0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f6e411f0 CR3: 000000004bae7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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_call_function_single+0x93/0xc0 arch/x86/kernel/smp.c:243 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:smpboot_thread_fn+0x21c/0x9c0 kernel/smpboot.c:137 Code: e8 39 7c 74 00 e9 79 fe ff ff e8 af d3 28 00 48 89 e8 48 c1 e8 03 0f b6 04 18 84 c0 74 08 3c 03 0f 8e 90 06 00 00 44 8b 6d 00 7f 10 0e 08 41 89 c7 89 c6 44 89 ef e8 82 d6 28 00 45 39 fd 0f RSP: 0018:ffffc90000147ed0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff888010e43a00 RSI: ffffffff814fc641 RDI: 0000000000000003 RBP: ffff88823bc04000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff814fc51a R11: 0000000000000000 R12: ffffffff8bc38840 R13: 0000000000000000 R14: ffff888010e43a00 R15: 0000000000000000 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 ---------------- Code disassembly (best guess): 0: e8 39 7c 74 00 callq 0x747c3e 5: e9 79 fe ff ff jmpq 0xfffffe83 a: e8 af d3 28 00 callq 0x28d3be f: 48 89 e8 mov %rbp,%rax 12: 48 c1 e8 03 shr $0x3,%rax 16: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax 1a: 84 c0 test %al,%al 1c: 74 08 je 0x26 1e: 3c 03 cmp $0x3,%al 20: 0f 8e 90 06 00 00 jle 0x6b6 26: 44 8b 6d 00 mov 0x0(%rbp),%r13d * 2a: e8 7f 10 0e 08 callq 0x80e10ae <-- trapping instruction 2f: 41 89 c7 mov %eax,%r15d 32: 89 c6 mov %eax,%esi 34: 44 89 ef mov %r13d,%edi 37: e8 82 d6 28 00 callq 0x28d6be 3c: 45 39 fd cmp %r15d,%r13d 3f: 0f .byte 0xf