================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.1/6058 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029827948 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029827948 (&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_client_leave+0x37/0x1a0 sound/core/seq/seq_queue.c:543 seq_free_client1.part.0+0x10a/0x260 sound/core/seq/seq_clientmgr.c:285 seq_free_client1 sound/core/seq/seq_clientmgr.c:278 [inline] seq_free_client+0x74/0x170 sound/core/seq/seq_clientmgr.c:306 snd_seq_release+0x50/0xe0 sound/core/seq/seq_clientmgr.c:387 __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: 2035 hardirqs last enabled at (2034): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:351 hardirqs last disabled at (2035): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (2035): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (1924): [] sctp_sendmsg+0xf2c/0x1eb0 net/sctp/socket.c:2036 softirqs last disabled at (2029): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (2029): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (2029): [] 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 *** 6 locks held by syz-executor.1/6058: #0: ffff88802a4be420 (sb_writers#5){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:3885 #1: ffff88805e85e800 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:828 [inline] #1: ffff88805e85e800 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x1c2/0x530 fs/namei.c:3892 #2: ffff88802a4c2950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1125/0x1620 fs/jbd2/transaction.c:463 #3: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #3: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #3: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: security_sid_to_context_core+0x21f/0x640 security/selinux/ss/services.c:1353 #4: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #4: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #4: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: sidtab_sid2str_get+0x8f/0x680 security/selinux/ss/sidtab.c:617 #5: ffffc90000007cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 0 PID: 6058 Comm: syz-executor.1 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:orc_find arch/x86/kernel/unwind_orc.c:218 [inline] RIP: 0010:unwind_next_frame+0x289/0x23a0 arch/x86/kernel/unwind_orc.c:494 Code: 90 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 7f 96 aa 00 42 8b 04 b5 ac 31 de 90 <41> 83 c5 01 4a 8d 3c ad ac 31 de 90 48 89 fa 48 c1 ea 03 89 44 24 RSP: 0018:ffffc900037ff438 EFLAGS: 00000246 RAX: 000000000009c1f3 RBX: ffffc900037ff4b8 RCX: ffffc90005372000 RDX: 0000000000000000 RSI: ffffffff813c991b RDI: ffffffff90eb07c0 RBP: 0000000000000001 R08: 0000000000000004 R09: 0000000000033585 R10: 00000000000a0000 R11: 0000000000000004 R12: ffffffff8435853b R13: 0000000000033585 R14: 0000000000033585 R15: ffffc900037ff4ed arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc_node_track_caller+0x220/0x470 mm/slub.c:3986 kmemdup+0x29/0x60 mm/util.c:131 kmemdup include/linux/fortify-string.h:738 [inline] sidtab_sid2str_get+0x17a/0x680 security/selinux/ss/sidtab.c:625 sidtab_entry_to_string+0x33/0x110 security/selinux/ss/services.c:1268 security_sid_to_context_core+0x35c/0x640 security/selinux/ss/services.c:1371 selinux_inode_init_security+0x465/0x670 security/selinux/hooks.c:2948 security_inode_init_security+0x1a5/0x380 security/security.c:1722 __ext4_new_inode+0x4226/0x5180 fs/ext4/ialloc.c:1326 ext4_mkdir+0x283/0xb70 fs/ext4/namei.c:3013 vfs_mkdir+0x57d/0x820 fs/namei.c:4126 do_mkdirat+0x301/0x3a0 fs/namei.c:4149 __do_sys_mkdirat fs/namei.c:4164 [inline] __se_sys_mkdirat fs/namei.c:4162 [inline] __x64_sys_mkdirat+0x114/0x170 fs/namei.c:4162 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: 0033:0x7f5c40c7c967 Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5c419b8ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f5c419b8f80 RCX: 00007f5c40c7c967 RDX: 00000000000001ff RSI: 0000000020002080 RDI: 00000000ffffff9c RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020002080 R13: 00007f5c419b8f40 R14: 0000000000000000 R15: 0000000000000000 vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun vkms_vblank_simulate: vblank timer overrun ---------------- Code disassembly (best guess): 0: 90 nop 1: 48 89 fa mov %rdi,%rdx 4: 48 c1 ea 03 shr $0x3,%rdx 8: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx c: 48 89 f8 mov %rdi,%rax f: 83 e0 07 and $0x7,%eax 12: 83 c0 03 add $0x3,%eax 15: 38 d0 cmp %dl,%al 17: 7c 09 jl 0x22 19: 84 d2 test %dl,%dl 1b: 74 05 je 0x22 1d: e8 7f 96 aa 00 call 0xaa96a1 22: 42 8b 04 b5 ac 31 de mov -0x6f21ce54(,%r14,4),%eax 29: 90 * 2a: 41 83 c5 01 add $0x1,%r13d <-- trapping instruction 2e: 4a 8d 3c ad ac 31 de lea -0x6f21ce54(,%r13,4),%rdi 35: 90 36: 48 89 fa mov %rdi,%rdx 39: 48 c1 ea 03 shr $0x3,%rdx 3d: 89 .byte 0x89 3e: 44 rex.R 3f: 24 .byte 0x24