================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.0/9554 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029cfd148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029cfd148 (&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_timer_user_release+0x91/0x260 sound/core/timer.c:1468 __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: 1976589 hardirqs last enabled at (1976588): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (1976588): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (1976589): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1976589): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (1976178): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (1976178): [] __do_softirq+0x596/0x8de kernel/softirq.c:583 softirqs last disabled at (1976585): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (1976585): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (1976585): [] 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 *** 4 locks held by syz-executor.0/9554: #0: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:116 [inline] #0: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:215 [inline] #0: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1108 [inline] #0: ffffffff8e11e410 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_path_perm+0x25f/0x450 security/tomoyo/file.c:821 #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #1: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: prepend_path+0xb7/0xf50 fs/d_path.c:164 #2: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #2: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #2: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: prepend_path+0x267/0xf50 fs/d_path.c:168 #3: ffffc90000007cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 0 PID: 9554 Comm: syz-executor.0 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:read_seqbegin_or_lock include/linux/seqlock.h:1076 [inline] RIP: 0010:read_seqbegin_or_lock include/linux/seqlock.h:1073 [inline] RIP: 0010:prepend_path+0x377/0xf50 fs/d_path.c:171 Code: 75 08 48 c7 c7 48 46 41 8d e8 f5 86 63 ff 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 43 38 85 ff 48 85 db 5a 0f 85 27 0a 00 00 24 3d 85 ff 48 8b 85 28 ff ff ff 0f b6 00 84 c0 74 08 3c 03 0f RSP: 0018:ffffc900036e78d0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8207db2f RDX: ffff8880206b1e00 RSI: ffffffff8207c3da RDI: 0000000000000007 RBP: ffffc900036e79d0 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000003 R12: 00000000000052d6 R13: 1ffff920006dcf28 R14: 0000000000000000 R15: dffffc0000000000 d_absolute_path+0xff/0x1b0 fs/d_path.c:234 tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline] tomoyo_realpath_from_path+0x36a/0x720 security/tomoyo/realpath.c:271 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x273/0x450 security/tomoyo/file.c:822 security_inode_getattr+0xf4/0x160 security/security.c:2263 vfs_getattr fs/stat.c:173 [inline] vfs_fstat+0x53/0xd0 fs/stat.c:198 vfs_fstatat+0x134/0x150 fs/stat.c:300 __do_sys_newfstatat+0x98/0x120 fs/stat.c:468 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: 0033:0x7f035de7c90a Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 0b 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b0 ff ff ff f7 RSP: 002b:00007ffe163f9e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f035de7c90a RDX: 00007ffe163f9e50 RSI: 00007f035df04767 RDI: 0000000000000003 RBP: 00007ffe163f9e50 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000001000 R11: 0000000000000206 R12: 00007ffe163fb080 R13: 00007f035dec93b9 R14: 0000000000073239 R15: 0000000000000002 ---------------- Code disassembly (best guess): 0: 75 08 jne 0xa 2: 48 c7 c7 48 46 41 8d mov $0xffffffff8d414648,%rdi 9: e8 f5 86 63 ff call 0xff638703 e: 9c pushf f: 5b pop %rbx 10: 81 e3 00 02 00 00 and $0x200,%ebx 16: 31 ff xor %edi,%edi 18: 48 89 de mov %rbx,%rsi 1b: e8 43 38 85 ff call 0xff853863 20: 48 85 db test %rbx,%rbx 23: 5a pop %rdx 24: 0f 85 27 0a 00 00 jne 0xa51 * 2a: e8 24 3d 85 ff call 0xff853d53 <-- trapping instruction 2f: 48 8b 85 28 ff ff ff mov -0xd8(%rbp),%rax 36: 0f b6 00 movzbl (%rax),%eax 39: 84 c0 test %al,%al 3b: 74 08 je 0x45 3d: 3c 03 cmp $0x3,%al 3f: 0f .byte 0xf