BUG: sleeping function called from invalid context at kernel/workqueue.c:4561 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2989, name: syz-executor preempt_count: 101, expected: 0 RCU nest depth: 0, expected: 0 locks held by syz-executor/2989: 1, last CPU#0: #0: ffffc90000007c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745 Preemption disabled at: [] alloc_from_pcs mm/slub.c:4844 [inline] [] slab_alloc_node mm/slub.c:4984 [inline] [] __kmalloc_cache_noprof+0xcb/0x680 mm/slub.c:5559 CPU: 0 UID: 0 PID: 2989 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 __might_resched.cold+0x1dc/0x222 kernel/sched/core.c:9264 __cancel_work_sync kernel/workqueue.c:4561 [inline] cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4642 mmc_free_host+0x19/0x40 drivers/mmc/core/host.c:700 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0x168/0x210 kernel/softirq.c:758 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:stackdepot_memcmp lib/stackdepot.c:585 [inline] RIP: 0010:find_stack lib/stackdepot.c:618 [inline] RIP: 0010:stack_depot_save_flags+0x1b5/0x9f0 lib/stackdepot.c:676 Code: 00 45 39 4e 10 75 ee 45 3b 6e 14 75 e8 31 c0 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 49 8b 7c c6 20 <49> 39 3c c4 75 c5 48 83 c0 01 48 39 d0 75 ec f6 c3 02 74 26 41 8b RSP: 0018:ffffc90001427988 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 000000009cbb5f0a RDX: 000000000000000d RSI: 00000000e9856ca0 RDI: ffffffff82203370 RBP: 0000000000000920 R08: 0000000000db88c0 R09: 00000000b58db88c R10: 0000000000000001 R11: 0000000000000000 R12: ffffc900014279e0 R13: 000000000000000d R14: ffff888122aa2520 R15: ffff8881f47b88c0 kasan_save_stack+0x3f/0x50 mm/kasan/common.c:58 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:409 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:426 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2d8/0x680 mm/slub.c:5563 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] netlbl_secattr_alloc_noprof include/net/netlabel.h:385 [inline] selinux_netlbl_sock_genattr+0xe7/0x4e0 security/selinux/netlabel.c:78 selinux_netlbl_socket_post_create+0xb0/0x1c0 security/selinux/netlabel.c:404 selinux_socket_post_create+0x368/0x7e0 security/selinux/hooks.c:5098 security_socket_post_create+0x5c/0x90 security/security.c:4215 __sock_create+0x70b/0x860 net/socket.c:1699 sock_create net/socket.c:1734 [inline] __sys_socket_create net/socket.c:1771 [inline] __sys_socket+0x14d/0x260 net/socket.c:1818 __do_sys_socket net/socket.c:1832 [inline] __se_sys_socket net/socket.c:1830 [inline] __x64_sys_socket+0x72/0xb0 net/socket.c:1830 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x119/0x710 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f34531b0dc7 Code: f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 29 00 00 00 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:00007fffef4ae7a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f3453403460 RCX: 00007f34531b0dc7 RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002 RBP: 00007fffef4aeecc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000124 R13: 00000000000927c0 R14: 0000000000000000 R15: 00007fffef4aef20 ODEBUG: object ffffc90000007a60 is NOT on stack ffffc90001420000, but annotated. ------------[ cut here ]------------ 1 WARNING: lib/debugobjects.c:672 at debug_object_is_on_stack lib/debugobjects.c:672 [inline], CPU#0: syz-executor/2989 WARNING: lib/debugobjects.c:672 at lookup_object_or_alloc.part.0.cold+0x19/0x40 lib/debugobjects.c:705, CPU#0: syz-executor/2989 Modules linked in: CPU: 0 UID: 0 PID: 2989 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:672 [inline] RIP: 0010:lookup_object_or_alloc.part.0.cold+0x19/0x40 lib/debugobjects.c:705 Code: c4 60 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 83 c5 01 89 2d 60 8b 0f 13 4c 89 e6 48 c7 c7 c0 c8 d2 87 e8 21 c2 fa ff 90 <0f> 0b 90 e9 b2 e0 bb 01 83 c5 01 89 2d 3f 8b 0f 13 49 39 c4 73 da RSP: 0018:ffffc900000078f0 EFLAGS: 00010082 RAX: 0000000000000050 RBX: ffff8881229f1b28 RCX: 0000000000000000 RDX: 0000000000000050 RSI: ffffffff8193b6e9 RDI: fffff52000000f0f RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000102 R11: 0000000000000001 R12: ffffc90000007a60 R13: ffff88810fb79e40 R14: 0000000000000001 R15: 0000000000000000 FS: 000055555ded2500(0000) GS:ffff8882683d5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555deed908 CR3: 0000000125424000 CR4: 00000000003506f0 Call Trace: lookup_object_or_alloc lib/debugobjects.c:682 [inline] __debug_object_init+0x2a9/0x3d0 lib/debugobjects.c:798 __synchronize_srcu+0x1c3/0x300 kernel/rcu/srcutree.c:1475 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline] wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237 wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236 mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69 device_release+0xd2/0x270 drivers/base/core.c:2640 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1f7/0x640 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3884 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0x168/0x210 kernel/softirq.c:758 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:stackdepot_memcmp lib/stackdepot.c:585 [inline] RIP: 0010:find_stack lib/stackdepot.c:618 [inline] RIP: 0010:stack_depot_save_flags+0x1b5/0x9f0 lib/stackdepot.c:676 Code: 00 45 39 4e 10 75 ee 45 3b 6e 14 75 e8 31 c0 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 49 8b 7c c6 20 <49> 39 3c c4 75 c5 48 83 c0 01 48 39 d0 75 ec f6 c3 02 74 26 41 8b RSP: 0018:ffffc90001427988 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 000000009cbb5f0a RDX: 000000000000000d RSI: 00000000e9856ca0 RDI: ffffffff82203370 RBP: 0000000000000920 R08: 0000000000db88c0 R09: 00000000b58db88c R10: 0000000000000001 R11: 0000000000000000 R12: ffffc900014279e0 R13: 000000000000000d R14: ffff888122aa2520 R15: ffff8881f47b88c0 kasan_save_stack+0x3f/0x50 mm/kasan/common.c:58 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:409 [inline] __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:426 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x2d8/0x680 mm/slub.c:5563 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] netlbl_secattr_alloc_noprof include/net/netlabel.h:385 [inline] selinux_netlbl_sock_genattr+0xe7/0x4e0 security/selinux/netlabel.c:78 selinux_netlbl_socket_post_create+0xb0/0x1c0 security/selinux/netlabel.c:404 selinux_socket_post_create+0x368/0x7e0 security/selinux/hooks.c:5098 security_socket_post_create+0x5c/0x90 security/security.c:4215 __sock_create+0x70b/0x860 net/socket.c:1699 sock_create net/socket.c:1734 [inline] __sys_socket_create net/socket.c:1771 [inline] __sys_socket+0x14d/0x260 net/socket.c:1818 __do_sys_socket net/socket.c:1832 [inline] __se_sys_socket net/socket.c:1830 [inline] __x64_sys_socket+0x72/0xb0 net/socket.c:1830 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x119/0x710 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f34531b0dc7 Code: f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 29 00 00 00 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:00007fffef4ae7a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f3453403460 RCX: 00007f34531b0dc7 RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002 RBP: 00007fffef4aeecc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000124 R13: 00000000000927c0 R14: 0000000000000000 R15: 00007fffef4aef20 ---------------- Code disassembly (best guess): 0: 00 45 39 add %al,0x39(%rbp) 3: 4e 10 75 ee rex.WRX adc %r14b,-0x12(%rbp) 7: 45 3b 6e 14 cmp 0x14(%r14),%r13d b: 75 e8 jne 0xfffffff5 d: 31 c0 xor %eax,%eax f: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 16: 00 00 00 00 1a: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 21: 00 00 00 00 25: 49 8b 7c c6 20 mov 0x20(%r14,%rax,8),%rdi * 2a: 49 39 3c c4 cmp %rdi,(%r12,%rax,8) <-- trapping instruction 2e: 75 c5 jne 0xfffffff5 30: 48 83 c0 01 add $0x1,%rax 34: 48 39 d0 cmp %rdx,%rax 37: 75 ec jne 0x25 39: f6 c3 02 test $0x2,%bl 3c: 74 26 je 0x64 3e: 41 rex.B 3f: 8b .byte 0x8b