BUG: sleeping function called from invalid context at kernel/workqueue.c:4561 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 8744, name: syz.4.698 preempt_count: 100, expected: 0 RCU nest depth: 1, expected: 0 locks held by syz.4.698/8744: 2, last CPU#0: #0: ffffffff904f3938 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #0: ffffffff904f3938 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:320 [inline] #0: ffffffff904f3938 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1112 [inline] #0: ffffffff904f3938 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_path_number_perm+0x219/0x5f0 security/tomoyo/file.c:727 #1: ffffc90000007ce0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745 Preemption disabled at: [] irq_enter_rcu+0x1d/0x1a0 kernel/softirq.c:711 CPU: 0 UID: 0 PID: 8744 Comm: syz.4.698 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 __might_resched+0x36a/0x4c0 kernel/sched/core.c:9195 __cancel_work_sync kernel/workqueue.c:4561 [inline] cancel_delayed_work_sync+0x6b/0xf0 kernel/workqueue.c:4642 mmc_free_host+0x19/0x40 drivers/mmc/core/host.c:700 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2374 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386 run_timer_base kernel/time/timer.c:2395 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405 handle_softirqs+0x265/0x8d0 kernel/softirq.c:669 __do_softirq kernel/softirq.c:703 [inline] invoke_softirq kernel/softirq.c:542 [inline] __irq_exit_rcu+0xc6/0x220 kernel/softirq.c:786 irq_exit_rcu+0x9/0x30 kernel/softirq.c:809 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:lock_release+0x2e1/0x3c0 kernel/locking/lockdep.c:5968 Code: 3a f4 12 00 00 00 00 eb b5 e8 9b b8 48 0a f7 c3 00 02 00 00 74 b9 65 48 8b 05 a3 f2 f3 12 48 3b 44 24 28 75 48 fb 48 83 c4 30 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 40 c0 4b 0a cc 48 8d 3d 58 54 da RSP: 0018:ffffc90004e6f668 EFLAGS: 00000282 RAX: 80cc5d2471965e00 RBX: 0000000000000206 RCX: 0000000000000046 RDX: ffffc90004e6f701 RSI: ffffffff8e6f76c2 RDI: ffffffff8c6e0480 RBP: ffff88803070e998 R08: ffffc90004e6fbf0 R09: 0000000000000000 R10: ffffc90004e6f798 R11: fffff520009cdef5 R12: 0000000000000001 R13: 0000000000000001 R14: ffffffff8fd589a0 R15: ffff88803070ddc0 rcu_lock_release include/linux/rcupdate.h:319 [inline] rcu_read_unlock include/linux/rcupdate.h:880 [inline] class_rcu_destructor include/linux/rcupdate.h:1216 [inline] unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:409 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:426 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5414 [inline] __kmalloc_noprof+0x366/0x710 mm/slub.c:5439 _kmalloc_noprof include/linux/slab.h:995 [inline] tomoyo_realpath_from_path+0xef/0x640 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x246/0x5f0 security/tomoyo/file.c:728 security_file_ioctl+0xc3/0x2a0 security/security.c:2533 __do_sys_ioctl fs/ioctl.c:591 [inline] __se_sys_ioctl+0x47/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fce62f9f559 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fce63e4e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fce63225fa0 RCX: 00007fce62f9f559 RDX: 0000000000000000 RSI: 00000000c0506107 RDI: 0000000000000004 RBP: 00007fce63036b20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fce63226038 R14: 00007fce63225fa0 R15: 00007fce6334fa48 ODEBUG: object ffffc90000007aa0 is NOT on stack ffffc90004e68000, but annotated. ------------[ cut here ]------------ 1 WARNING: lib/debugobjects.c:672 at debug_object_is_on_stack lib/debugobjects.c:672 [inline], CPU#0: syz.4.698/8744 WARNING: lib/debugobjects.c:672 at lookup_object_or_alloc lib/debugobjects.c:705 [inline], CPU#0: syz.4.698/8744 WARNING: lib/debugobjects.c:672 at __debug_object_init+0x2c4/0x3c0 lib/debugobjects.c:798, CPU#0: syz.4.698/8744 Modules linked in: CPU: 0 UID: 0 PID: 8744 Comm: syz.4.698 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:672 [inline] RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:705 [inline] RIP: 0010:__debug_object_init+0x2c4/0x3c0 lib/debugobjects.c:798 Code: 01 07 cc 41 ff c7 44 89 3d 69 69 e7 16 48 c7 c1 80 0d 6e 8c 48 c7 c7 e0 0d 6e 8c 84 c0 48 0f 45 f9 48 89 de e8 7d fe 39 fc 90 <0f> 0b 90 e9 c0 fe ff ff e8 4f 1c 00 00 8b 05 01 24 6b 0b 3b 05 ff RSP: 0018:ffffc900000079d8 EFLAGS: 00010046 RAX: 0000000000000050 RBX: ffffc90000007aa0 RCX: 80cc5d2471965e00 RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000 RBP: ffff88803070dde0 R08: 0000000000000100 R09: 1ffff11017084942 R10: dffffc0000000000 R11: ffffed1017084943 R12: ffffc90000007ab0 R13: ffff888022e8b700 R14: dffffc0000000000 R15: 0000000000000001 FS: 00007fce63e4e6c0(0000) GS:ffff888123aaa000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000077102000 CR4: 00000000003526f0 Call Trace: __synchronize_srcu+0x1f9/0x2f0 kernel/rcu/srcutree.c:1680 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline] wakeup_source_unregister+0x129/0x3f0 drivers/base/power/wakeup.c:237 mmc_host_classdev_release+0x47/0x100 drivers/mmc/core/host.c:69 device_release+0xc4/0x1f0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x222/0x550 lib/kobject.c:737 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2374 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386 run_timer_base kernel/time/timer.c:2395 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405 handle_softirqs+0x265/0x8d0 kernel/softirq.c:669 __do_softirq kernel/softirq.c:703 [inline] invoke_softirq kernel/softirq.c:542 [inline] __irq_exit_rcu+0xc6/0x220 kernel/softirq.c:786 irq_exit_rcu+0x9/0x30 kernel/softirq.c:809 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:lock_release+0x2e1/0x3c0 kernel/locking/lockdep.c:5968 Code: 3a f4 12 00 00 00 00 eb b5 e8 9b b8 48 0a f7 c3 00 02 00 00 74 b9 65 48 8b 05 a3 f2 f3 12 48 3b 44 24 28 75 48 fb 48 83 c4 30 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 40 c0 4b 0a cc 48 8d 3d 58 54 da RSP: 0018:ffffc90004e6f668 EFLAGS: 00000282 RAX: 80cc5d2471965e00 RBX: 0000000000000206 RCX: 0000000000000046 RDX: ffffc90004e6f701 RSI: ffffffff8e6f76c2 RDI: ffffffff8c6e0480 RBP: ffff88803070e998 R08: ffffc90004e6fbf0 R09: 0000000000000000 R10: ffffc90004e6f798 R11: fffff520009cdef5 R12: 0000000000000001 R13: 0000000000000001 R14: ffffffff8fd589a0 R15: ffff88803070ddc0 rcu_lock_release include/linux/rcupdate.h:319 [inline] rcu_read_unlock include/linux/rcupdate.h:880 [inline] class_rcu_destructor include/linux/rcupdate.h:1216 [inline] unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:409 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:426 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5414 [inline] __kmalloc_noprof+0x366/0x710 mm/slub.c:5439 _kmalloc_noprof include/linux/slab.h:995 [inline] tomoyo_realpath_from_path+0xef/0x640 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x246/0x5f0 security/tomoyo/file.c:728 security_file_ioctl+0xc3/0x2a0 security/security.c:2533 __do_sys_ioctl fs/ioctl.c:591 [inline] __se_sys_ioctl+0x47/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fce62f9f559 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fce63e4e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fce63225fa0 RCX: 00007fce62f9f559 RDX: 0000000000000000 RSI: 00000000c0506107 RDI: 0000000000000004 RBP: 00007fce63036b20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fce63226038 R14: 00007fce63225fa0 R15: 00007fce6334fa48 ---------------- Code disassembly (best guess): 0: 3a f4 cmp %ah,%dh 2: 12 00 adc (%rax),%al 4: 00 00 add %al,(%rax) 6: 00 eb add %ch,%bl 8: b5 e8 mov $0xe8,%ch a: 9b fwait b: b8 48 0a f7 c3 mov $0xc3f70a48,%eax 10: 00 02 add %al,(%rdx) 12: 00 00 add %al,(%rax) 14: 74 b9 je 0xffffffcf 16: 65 48 8b 05 a3 f2 f3 mov %gs:0x12f3f2a3(%rip),%rax # 0x12f3f2c1 1d: 12 1e: 48 3b 44 24 28 cmp 0x28(%rsp),%rax 23: 75 48 jne 0x6d 25: fb sti 26: 48 83 c4 30 add $0x30,%rsp * 2a: 5b pop %rbx <-- trapping instruction 2b: 41 5c pop %r12 2d: 41 5d pop %r13 2f: 41 5e pop %r14 31: 41 5f pop %r15 33: 5d pop %rbp 34: e9 40 c0 4b 0a jmp 0xa4bc079 39: cc int3 3a: 48 rex.W 3b: 8d .byte 0x8d 3c: 3d .byte 0x3d 3d: 58 pop %rax 3e: 54 push %rsp 3f: da .byte 0xda