------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] prepare_to_wait_exclusive+0x7a/0x2b0 kernel/sched/wait.c:286 WARNING: CPU: 0 PID: 8659 at kernel/sched/core.c:9656 __might_sleep+0x105/0x150 kernel/sched/core.c:9656 Modules linked in: CPU: 0 PID: 8659 Comm: syz-executor.2 Not tainted 5.17.0-syzkaller-10752-g52d543b5497c #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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 f1 cb 89 e8 55 c7 c8 07 <0f> 0b e9 75 ff ff ff e8 cf 4a 73 00 e9 26 ff ff ff 89 34 24 e8 d2 RSP: 0018:ffffc90000007d68 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff8880174ed700 RCX: 0000000000000000 RDX: ffff8880174ed700 RSI: ffffffff81602018 RDI: fffff52000000f9f RBP: ffffffff8a248b00 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815fc9de R11: 0000000000000000 R12: 00000000000002fe R13: 0000000000000000 R14: ffffffff8a248f00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f7fc3b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00005560dde46600 CR3: 000000004d92c000 CR4: 0000000000150ef0 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:638 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194 Code: 74 24 10 e8 3a 27 fc f7 48 89 ef e8 82 a6 fc f7 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 53 be ef f7 65 8b 05 2c e5 a0 76 85 c0 74 0a 5b 5d c3 e8 e0 c2 RSP: 0018:ffffc9000612f720 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff20090ce RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001 RBP: ffff88801b55a6c0 R08: 0000000000000001 R09: ffffffff900089af R10: 0000000000000001 R11: 0000000000000001 R12: ffff88801b55a6c0 R13: 0000000000000202 R14: ffffc9000612f7d0 R15: 0000000000000001 spin_unlock_irqrestore include/linux/spinlock.h:404 [inline] prepare_to_wait_exclusive+0xd7/0x2b0 kernel/sched/wait.c:287 unix_wait_for_peer+0xc6/0x280 net/unix/af_unix.c:1388 unix_dgram_sendmsg+0x1814/0x1a90 net/unix/af_unix.c:1993 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x331/0x810 net/socket.c:2413 ___sys_sendmsg+0xf3/0x170 net/socket.c:2467 __sys_sendmmsg+0x297/0x470 net/socket.c:2546 __compat_sys_sendmmsg net/compat.c:361 [inline] __do_compat_sys_sendmmsg net/compat.c:368 [inline] __se_compat_sys_sendmmsg net/compat.c:365 [inline] __ia32_compat_sys_sendmmsg+0x9b/0x100 net/compat.c:365 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fc8549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7fc35cc EFLAGS: 00000296 ORIG_RAX: 0000000000000159 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000200bd000 RDX: 0000000000000318 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 74 24 je 0x26 2: 10 e8 adc %ch,%al 4: 3a 27 cmp (%rdi),%ah 6: fc cld 7: f7 48 89 ef e8 82 a6 testl $0xa682e8ef,-0x77(%rax) e: fc cld f: f7 81 e3 00 02 00 00 testl $0x9c257500,0x200e3(%rcx) 16: 75 25 9c 19: 58 pop %rax 1a: f6 c4 02 test $0x2,%ah 1d: 75 2d jne 0x4c 1f: 48 85 db test %rbx,%rbx 22: 74 01 je 0x25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 53 be ef f7 callq 0xf7efbe82 <-- trapping instruction 2f: 65 8b 05 2c e5 a0 76 mov %gs:0x76a0e52c(%rip),%eax # 0x76a0e562 36: 85 c0 test %eax,%eax 38: 74 0a je 0x44 3a: 5b pop %rbx 3b: 5d pop %rbp 3c: c3 retq 3d: e8 .byte 0xe8 3e: e0 c2 loopne 0x2