------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] snd_rawmidi_write+0x3e3/0xbb0 sound/core/rawmidi.c:1534 WARNING: CPU: 1 PID: 9266 at kernel/sched/core.c:9656 __might_sleep+0x105/0x150 kernel/sched/core.c:9656 Modules linked in: CPU: 1 PID: 9266 Comm: syz-executor.5 Tainted: G W 5.17.0-syzkaller-10752-g52d543b5497c #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 da cb 89 e8 fb 51 c9 07 <0f> 0b e9 75 ff ff ff e8 ef b1 72 00 e9 26 ff ff ff 89 34 24 e8 f2 RSP: 0018:ffffc900003f8d68 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff888047738200 RCX: 0000000000000000 RDX: ffff888047738200 RSI: ffffffff815f4e58 RDI: fffff5200007f19f RBP: ffffffff8a23ffc0 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815ef81e R11: 0000000000000000 R12: 00000000000002fe R13: 0000000000000000 R14: ffffffff8a2403c0 R15: 0000000000000000 FS: 00007f628d6d3700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020475000 CR3: 0000000044c54000 CR4: 00000000003506e0 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:get_lock_parent_ip include/linux/ftrace.h:901 [inline] RIP: 0010:preempt_latency_start kernel/sched/core.c:5515 [inline] RIP: 0010:preempt_latency_start kernel/sched/core.c:5512 [inline] RIP: 0010:preempt_schedule_common+0x6d/0xc0 kernel/sched/core.c:6546 Code: ff ff be 08 00 00 00 48 89 df 65 ff 0d 5c 53 a2 76 e8 47 32 63 f8 80 7d 00 00 75 49 48 8b 03 a8 08 75 bd 5b 5d 41 5c 41 5d c3 <4c> 8b 6c 24 20 4c 89 ef e8 96 17 fd f7 85 c0 75 1e 48 8d bb 58 14 RSP: 0018:ffffc900021dfc88 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff888047738200 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff817e81f1 RDI: 0000000000000001 RBP: ffffed1008ee7040 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff817e81d8 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff88804af2a050 R14: ffff88804af2a090 R15: ffffc900021dfdb0 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x3c/0x40 kernel/locking/spinlock.c:202 spin_unlock_irq include/linux/spinlock.h:399 [inline] snd_rawmidi_write+0x47d/0xbb0 sound/core/rawmidi.c:1541 vfs_write+0x26f/0xad0 fs/read_write.c:589 ksys_write+0x1ee/0x250 fs/read_write.c:644 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f628c489049 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f628d6d3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f628c59bf60 RCX: 00007f628c489049 RDX: 00000000fffffd2c RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007f628c4e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd7f52932f R14: 00007f628d6d3300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: be 08 00 00 00 mov $0x8,%esi 5: 48 89 df mov %rbx,%rdi 8: 65 ff 0d 5c 53 a2 76 decl %gs:0x76a2535c(%rip) # 0x76a2536b f: e8 47 32 63 f8 callq 0xf863325b 14: 80 7d 00 00 cmpb $0x0,0x0(%rbp) 18: 75 49 jne 0x63 1a: 48 8b 03 mov (%rbx),%rax 1d: a8 08 test $0x8,%al 1f: 75 bd jne 0xffffffde 21: 5b pop %rbx 22: 5d pop %rbp 23: 41 5c pop %r12 25: 41 5d pop %r13 27: c3 retq * 28: 4c 8b 6c 24 20 mov 0x20(%rsp),%r13 <-- trapping instruction 2d: 4c 89 ef mov %r13,%rdi 30: e8 96 17 fd f7 callq 0xf7fd17cb 35: 85 c0 test %eax,%eax 37: 75 1e jne 0x57 39: 48 rex.W 3a: 8d .byte 0x8d 3b: bb .byte 0xbb 3c: 58 pop %rax 3d: 14 .byte 0x14