------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] do_wait+0x227/0xce0 kernel/exit.c:1504 WARNING: CPU: 0 PID: 3633 at kernel/sched/core.c:9656 __might_sleep+0x105/0x150 kernel/sched/core.c:9656 Modules linked in: CPU: 0 PID: 3633 Comm: syz-executor.2 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+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 e0 c8 cb 89 e8 3a b3 c8 07 <0f> 0b e9 75 ff ff ff e8 1f 95 72 00 e9 26 ff ff ff 89 34 24 e8 22 RSP: 0018:ffffc90000007d68 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88807e638000 RCX: 0000000000000000 RDX: ffff88807e638000 RSI: ffffffff815efad8 RDI: fffff52000000f9f RBP: ffffffff8a23f2c0 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815ea4ae R11: 0000000000000000 R12: 00000000000002fe R13: 0000000000000000 R14: ffffffff8a23f6c0 R15: 0000000000000000 FS: 0000555557036400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe62f626ce0 CR3: 0000000041fdf000 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_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:check_kcov_mode kernel/kcov.c:166 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200 Code: 4a 00 5d be 03 00 00 00 e9 36 66 74 02 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 c9 a2 8a 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 70 02 00 a9 RSP: 0018:ffffc9000321fc88 EFLAGS: 00000206 RAX: 0000000080000001 RBX: ffff88802e5bc2c0 RCX: 0000000000000000 RDX: ffff88807e638000 RSI: ffffffff81465112 RDI: 0000000000000003 RBP: ffffc9000321fd18 R08: 0000000000000000 R09: ffffffff8ba0a083 R10: ffffffff81464d68 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff88807e638000 R14: 0000000000000004 R15: ffff88807e6385e8 do_wait_thread kernel/exit.c:1401 [inline] do_wait+0x6bd/0xce0 kernel/exit.c:1518 kernel_wait4+0x14c/0x260 kernel/exit.c:1681 __do_sys_wait4+0x13f/0x150 kernel/exit.c:1709 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: 0033:0x7f3c8ce874e7 Code: 89 7c 24 10 48 89 4c 24 18 e8 35 50 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 65 50 02 00 8b 44 RSP: 002b:00007fffcb742780 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000000107 RCX: 00007f3c8ce874e7 RDX: 0000000040000001 RSI: 00007fffcb74280c RDI: 00000000ffffffff RBP: 00007fffcb74280c R08: 0000000000000000 R09: 00007fffcb7bc080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 00000000000607f1 R14: 0000000000000000 R15: 00007fffcb742870 ---------------- Code disassembly (best guess): 0: 4a 00 5d be rex.WX add %bl,-0x42(%rbp) 4: 03 00 add (%rax),%eax 6: 00 00 add %al,(%rax) 8: e9 36 66 74 02 jmpq 0x2746643 d: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 13: 48 8b be a8 01 00 00 mov 0x1a8(%rsi),%rdi 1a: e8 b4 ff ff ff callq 0xffffffd3 1f: 31 c0 xor %eax,%eax 21: c3 retq 22: 90 nop 23: 65 8b 05 c9 a2 8a 7e mov %gs:0x7e8aa2c9(%rip),%eax # 0x7e8aa2f3 * 2a: 89 c1 mov %eax,%ecx <-- trapping instruction 2c: 48 8b 34 24 mov (%rsp),%rsi 30: 81 e1 00 01 00 00 and $0x100,%ecx 36: 65 48 8b 14 25 00 70 mov %gs:0x27000,%rdx 3d: 02 00 3f: a9 .byte 0xa9