Hello, syzbot found the following issue on: HEAD commit: 1930a6e739c4 Merge tag 'ptrace-cleanups-for-v5.18' of git:.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=133bd72b700000 kernel config: https://syzkaller.appspot.com/x/.config?x=39f9ae4aa54206fb dashboard link: https://syzkaller.appspot.com/bug?extid=ef9c11f60b926d1682a5 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ef9c11f60b926d1682a5@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: sleeping function called from invalid context at block/blk-sysfs.c:766 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 0, name: swapper/1 preempt_count: 101, expected: 0 RCU nest depth: 0, expected: 0 1 lock held by swapper/1/0: #0: ffffffff8bd81e40 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2524 [inline] #0: ffffffff8bd81e40 (rcu_callback){....}-{0:0}, at: rcu_core+0x73d/0x1880 kernel/rcu/tree.c:2786 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.17.0-syzkaller-12882-g1930a6e739c4 #0 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 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 </IRQ> asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645 Code: ff ff ff 48 89 df e8 c4 8c 63 f8 e9 55 ff ff ff 4c 89 e7 e8 b7 8c 63 f8 eb 96 0f 1f 44 00 00 eb 07 0f 00 2d 57 d4 65 00 fb f4 <c3> cc cc cc cc 41 55 41 54 55 48 89 fd 53 e8 92 e4 17 f8 e8 7d 21 RSP: 0018:ffffc9000045fdf8 EFLAGS: 00000202 RAX: 000000000036c1fd RBX: ffff88801149d700 RCX: ffffffff895dcc51 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000001 R09: ffff88802cb3af93 R10: ffffed10059675f2 R11: 0000000000000000 R12: ffffed1002293ae0 R13: 0000000000000001 R14: ffffffff8db640d0 R15: 0000000000000000 default_idle_call+0x87/0xd0 kernel/sched/idle.c:109 secondary_startup_64_no_verify+0xc3/0xcb </TASK> ================================ WARNING: inconsistent lock state 5.17.0-syzkaller-12882-g1930a6e739c4 #0 Tainted: G W -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. swapper/1/0 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888042c5ba30 (&xa->xa_lock#8){+.?.}-{2:2}, at: xa_destroy+0xb3/0x360 lib/xarray.c:2207 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5641 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5606 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:349 [inline] xa_insert include/linux/xarray.h:772 [inline] blk_mq_init_hctx block/blk-mq.c:3501 [inline] blk_mq_alloc_and_init_hctx+0x52d/0x1190 block/blk-mq.c:3962 blk_mq_realloc_hw_ctxs+0x43d/0x590 block/blk-mq.c:3991 blk_mq_init_allocated_queue+0x457/0x13d0 block/blk-mq.c:4053 blk_mq_init_queue_data block/blk-mq.c:3906 [inline] __blk_mq_alloc_disk+0xd1/0x1c0 block/blk-mq.c:3926 floppy_alloc_disk+0x3d/0x390 drivers/block/floppy.c:4495 do_floppy_init drivers/block/floppy.c:4576 [inline] floppy_async_init+0x316/0x21ca drivers/block/floppy.c:4746 async_run_entry_fn+0x9d/0x550 kernel/async.c:127 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 irq event stamp: 3588931 hardirqs last enabled at (3588930): [<ffffffff81c44ea5>] kasan_quarantine_put+0xf5/0x210 mm/kasan/quarantine.c:231 hardirqs last disabled at (3588931): [<ffffffff8960c0fe>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (3588931): [<ffffffff8960c0fe>] _raw_spin_lock_irqsave+0x4e/0x50 kernel/locking/spinlock.c:162 softirqs last enabled at (3588522): [<ffffffff81479a93>] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (3588522): [<ffffffff81479a93>] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 softirqs last disabled at (3588607): [<ffffffff81479a93>] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (3588607): [<ffffffff81479a93>] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&xa->xa_lock#8); <Interrupt> lock(&xa->xa_lock#8); *** DEADLOCK *** 1 lock held by swapper/1/0: #0: ffffffff8bd81e40 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2524 [inline] #0: ffffffff8bd81e40 (rcu_callback){....}-{0:0}, at: rcu_core+0x73d/0x1880 kernel/rcu/tree.c:2786 stack backtrace: CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W 5.17.0-syzkaller-12882-g1930a6e739c4 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:3935 [inline] valid_state kernel/locking/lockdep.c:3947 [inline] mark_lock_irq kernel/locking/lockdep.c:4150 [inline] mark_lock.part.0.cold+0x18/0xd8 kernel/locking/lockdep.c:4607 mark_lock kernel/locking/lockdep.c:4571 [inline] mark_usage kernel/locking/lockdep.c:4502 [inline] __lock_acquire+0x11e7/0x56c0 kernel/locking/lockdep.c:4983 lock_acquire kernel/locking/lockdep.c:5641 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5606 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 xa_destroy+0xb3/0x360 lib/xarray.c:2207 blk_mq_release+0x2b1/0x3e0 block/blk-mq.c:3887 blk_release_queue+0x15b/0x320 block/blk-sysfs.c:780 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 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:734 Code: ff ff ff 48 89 df e8 c4 8c 63 f8 e9 55 ff ff ff 4c 89 e7 e8 b7 8c 63 f8 eb 96 0f 1f 44 00 00 eb 07 0f 00 2d 57 d4 65 00 fb f4 <c3> cc cc cc cc 41 55 41 54 55 48 89 fd 53 e8 92 e4 17 f8 e8 7d 21 RSP: 0018:ffffc9000045fdf8 EFLAGS: 00000202 RAX: 000000000036c1fd RBX: ffff88801149d700 RCX: ffffffff895dcc51 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000001 R09: ffff88802cb3af93 R10: ffffed10059675f2 R11: 0000000000000000 R12: ffffed1002293ae0 R13: 0000000000000001 R14: ffffffff8db640d0 R15: 0000000000000000 default_idle_call+0x87/0xd0 kernel/sched/idle.c:109 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x401/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 start_secondary+0x265/0x340 arch/x86/kernel/smpboot.c:266 secondary_startup_64_no_verify+0xc3/0xcb </TASK> ODEBUG: object ffffc90000528af0 is NOT on stack ffffc90000458000, but annotated. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 0 at lib/debugobjects.c:548 debug_object_is_on_stack lib/debugobjects.c:545 [inline] WARNING: CPU: 1 PID: 0 at lib/debugobjects.c:548 __debug_object_init.cold+0x252/0x2e5 lib/debugobjects.c:607 Modules linked in: CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W 5.17.0-syzkaller-12882-g1930a6e739c4 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:548 [inline] RIP: 0010:__debug_object_init.cold+0x252/0x2e5 lib/debugobjects.c:607 Code: 00 48 8d 7b 20 48 89 fa 48 c1 ea 03 80 3c 02 00 74 05 e8 b4 74 9b f8 48 8b 53 20 4c 89 e6 48 c7 c7 80 88 26 8a e8 a1 4c f1 ff <0f> 0b e9 d3 7f c7 fa 48 b8 00 01 00 00 00 00 ad de 48 89 ef 48 89 RSP: 0018:ffffc90000528920 EFLAGS: 00010286 RAX: 0000000000000050 RBX: ffff88801149d700 RCX: 0000000000000000 RDX: ffff88801149d700 RSI: ffffffff815fcd18 RDI: fffff520000a5116 RBP: ffff88801149d700 R08: 0000000000000050 R09: 0000000000000001 R10: ffffffff815f76ee R11: 0000000000000000 R12: ffffc90000528af0 R13: 1ffff920000a5133 R14: ffffffff90713c70 R15: ffffffff90713c68 FS: 0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000056b66efc CR3: 000000006d58f000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> __init_work+0x2d/0x50 kernel/workqueue.c:521 synchronize_rcu_expedited+0x392/0x620 kernel/rcu/tree_exp.h:851 synchronize_rcu+0x132/0x190 kernel/rcu/tree.c:3789 blk_trace_cleanup kernel/trace/blktrace.c:350 [inline] __blk_trace_remove+0xcb/0x1c0 kernel/trace/blktrace.c:365 blk_trace_shutdown+0x85/0x100 kernel/trace/blktrace.c:777 blk_release_queue+0x16f/0x320 block/blk-sysfs.c:782 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 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:734 Code: ff ff ff 48 89 df e8 c4 8c 63 f8 e9 55 ff ff ff 4c 89 e7 e8 b7 8c 63 f8 eb 96 0f 1f 44 00 00 eb 07 0f 00 2d 57 d4 65 00 fb f4 <c3> cc cc cc cc 41 55 41 54 55 48 89 fd 53 e8 92 e4 17 f8 e8 7d 21 RSP: 0018:ffffc9000045fdf8 EFLAGS: 00000202 RAX: 000000000036c1fd RBX: ffff88801149d700 RCX: ffffffff895dcc51 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000001 R09: ffff88802cb3af93 R10: ffffed10059675f2 R11: 0000000000000000 R12: ffffed1002293ae0 R13: 0000000000000001 R14: ffffffff8db640d0 R15: 0000000000000000 default_idle_call+0x87/0xd0 kernel/sched/idle.c:109 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x401/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 start_secondary+0x265/0x340 arch/x86/kernel/smpboot.c:266 secondary_startup_64_no_verify+0xc3/0xcb </TASK> ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 48 89 df mov %rbx,%rdi 3: e8 c4 8c 63 f8 callq 0xf8638ccc 8: e9 55 ff ff ff jmpq 0xffffff62 d: 4c 89 e7 mov %r12,%rdi 10: e8 b7 8c 63 f8 callq 0xf8638ccc 15: eb 96 jmp 0xffffffad 17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 1c: eb 07 jmp 0x25 1e: 0f 00 2d 57 d4 65 00 verw 0x65d457(%rip) # 0x65d47c 25: fb sti 26: f4 hlt * 27: c3 retq <-- trapping instruction 28: cc int3 29: cc int3 2a: cc int3 2b: cc int3 2c: 41 55 push %r13 2e: 41 54 push %r12 30: 55 push %rbp 31: 48 89 fd mov %rdi,%rbp 34: 53 push %rbx 35: e8 92 e4 17 f8 callq 0xf817e4cc 3a: e8 .byte 0xe8 3b: 7d 21 jge 0x5e --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
