================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.2/7475 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029463148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029463148 (&timer->lock){+.?.}-{2:2}, at: snd_timer_interrupt.part.0+0x31/0xd80 sound/core/timer.c:818 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] class_spinlock_constructor include/linux/spinlock.h:561 [inline] snd_timer_close_locked+0x65/0xbd0 sound/core/timer.c:412 snd_timer_close+0x8b/0xf0 sound/core/timer.c:464 snd_seq_timer_close+0xa4/0x100 sound/core/seq/seq_timer.c:302 queue_delete+0x49/0xa0 sound/core/seq/seq_queue.c:126 snd_seq_queue_delete+0x45/0x60 sound/core/seq/seq_queue.c:188 snd_seq_kernel_client_ctl+0x107/0x1c0 sound/core/seq/seq_clientmgr.c:2526 delete_seq_queue.isra.0+0xc8/0x150 sound/core/seq/oss/seq_oss_init.c:371 odev_release+0x52/0x80 sound/core/seq/oss/seq_oss.c:144 __fput+0x270/0xb80 fs/file_table.c:422 __fput_sync+0x47/0x50 fs/file_table.c:507 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __x64_sys_close+0x86/0x100 fs/open.c:1541 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 irq event stamp: 63499 hardirqs last enabled at (63498): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (63498): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (63499): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (63499): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (62826): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (62826): [] __do_softirq+0x596/0x8de kernel/softirq.c:583 softirqs last disabled at (63495): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (63495): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (63495): [] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&timer->lock); lock(&timer->lock); *** DEADLOCK *** 3 locks held by syz-executor.2/7475: #0: ffff888015ee2420 (sb_writers#6){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:643 #1: ffff88805f4c78f0 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline] #1: ffff88805f4c78f0 (&sb->s_type->i_mutex_key#12){+.+.}-{3:3}, at: shmem_file_write_iter+0x8c/0x140 mm/shmem.c:2916 #2: ffffc90000a08cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 1 PID: 7475 Comm: syz-executor.2 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_usage_bug kernel/locking/lockdep.c:3971 [inline] valid_state kernel/locking/lockdep.c:4013 [inline] mark_lock_irq kernel/locking/lockdep.c:4216 [inline] mark_lock+0x923/0xc60 kernel/locking/lockdep.c:4678 mark_usage kernel/locking/lockdep.c:4567 [inline] __lock_acquire+0x13d4/0x3b30 kernel/locking/lockdep.c:5091 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] snd_timer_interrupt.part.0+0x31/0xd80 sound/core/timer.c:818 snd_timer_interrupt sound/core/timer.c:1107 [inline] snd_timer_s_function+0x14f/0x200 sound/core/timer.c:1107 call_timer_fn+0x1a0/0x5b0 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers+0x74b/0xab0 kernel/time/timer.c:2408 __run_timer_base kernel/time/timer.c:2419 [inline] __run_timer_base kernel/time/timer.c:2412 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2428 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2438 __do_softirq+0x218/0x8de kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:227 [inline] RIP: 0010:read_seqbegin include/linux/seqlock.h:772 [inline] RIP: 0010:zone_span_seqbegin include/linux/memory_hotplug.h:134 [inline] RIP: 0010:page_outside_zone_boundaries mm/page_alloc.c:450 [inline] RIP: 0010:bad_range+0xcd/0x440 mm/page_alloc.c:469 Code: 89 ef e8 26 91 90 ff 48 8b 74 24 70 4c 89 ef e8 e9 81 90 ff 9c 5a 49 bb 00 00 00 00 00 fc ff df 80 e6 02 58 0f 85 30 02 00 00 <41> 0f b6 16 41 38 d7 7c 08 84 d2 0f 85 59 02 00 00 8b 93 c8 00 00 RSP: 0018:ffffc9000300f478 EFLAGS: 00000246 RAX: 000000000000f805 RBX: ffff88813fffa740 RCX: ffffffff81db95d8 RDX: 0000000000000006 RSI: ffffffff8b0cb740 RDI: ffffffff8b6e88a0 RBP: 000000000006ae75 R08: 0000000000000001 R09: fffffbfff27b4e45 R10: ffffffff93da722f R11: dffffc0000000000 R12: ffffea0001ab9d40 R13: ffff88813fffa810 R14: ffffed1027fff501 R15: 0000000000000003 rmqueue mm/page_alloc.c:2916 [inline] get_page_from_freelist+0xa08/0x3780 mm/page_alloc.c:3308 __alloc_pages+0x22b/0x2410 mm/page_alloc.c:4569 alloc_pages_mpol+0x258/0x600 mm/mempolicy.c:2133 shmem_alloc_folio+0x114/0x150 mm/shmem.c:1634 shmem_alloc_and_add_folio+0x14f/0x7b0 mm/shmem.c:1674 shmem_get_folio_gfp+0x685/0x13e0 mm/shmem.c:2061 shmem_get_folio mm/shmem.c:2166 [inline] shmem_write_begin+0x15a/0x370 mm/shmem.c:2750 generic_perform_write+0x272/0x620 mm/filemap.c:3930 shmem_file_write_iter+0x114/0x140 mm/shmem.c:2926 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6db/0x1100 fs/read_write.c:590 ksys_write+0x12f/0x260 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f01d267cbaf Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48 RSP: 002b:00007f01d21dde80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f01d267cbaf RDX: 0000000001000000 RSI: 00007f01c8400000 RDI: 000000000000000a RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000616a R10: 0000000000000772 R11: 0000000000000293 R12: 000000000000000a R13: 00007f01d21ddf80 R14: 00007f01d21ddf40 R15: 00007f01c8400000 ---------------- Code disassembly (best guess): 0: 89 ef mov %ebp,%edi 2: e8 26 91 90 ff call 0xff90912d 7: 48 8b 74 24 70 mov 0x70(%rsp),%rsi c: 4c 89 ef mov %r13,%rdi f: e8 e9 81 90 ff call 0xff9081fd 14: 9c pushf 15: 5a pop %rdx 16: 49 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%r11 1d: fc ff df 20: 80 e6 02 and $0x2,%dh 23: 58 pop %rax 24: 0f 85 30 02 00 00 jne 0x25a * 2a: 41 0f b6 16 movzbl (%r14),%edx <-- trapping instruction 2e: 41 38 d7 cmp %dl,%r15b 31: 7c 08 jl 0x3b 33: 84 d2 test %dl,%dl 35: 0f 85 59 02 00 00 jne 0x294 3b: 8b .byte 0x8b 3c: 93 xchg %eax,%ebx 3d: c8 .byte 0xc8