------------[ cut here ]------------ workqueue: cannot queue hci_cmd_timeout on wq hci2 WARNING: kernel/workqueue.c:2252 at __queue_work+0xd1f/0xf90 kernel/workqueue.c:2250, CPU#0: syz-executor/10948 Modules linked in: CPU: 0 UID: 0 PID: 10948 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:__queue_work+0xd4a/0xf90 kernel/workqueue.c:2250 Code: 83 c5 18 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 e7 81 a0 00 49 8b 75 00 49 81 c7 78 01 00 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 48 83 c4 58 5b 41 5c 41 5d 41 5e 41 5f 5d e9 8e 71 RSP: 0018:ffffc90000007c10 EFLAGS: 00010086 RAX: 1ffff1100c6cd151 RBX: 0000000000000008 RCX: ffff888031173d00 RDX: ffff88809c32e178 RSI: ffffffff8a8cc210 RDI: ffffffff8ff22010 RBP: 0000000000000100 R08: ffffffff8fef3477 R09: 1ffffffff1fde68e R10: dffffc0000000000 R11: ffffffff818c27d0 R12: dffffc0000000000 R13: ffff888063668a88 R14: ffffffff8ff22010 R15: ffff88809c32e178 FS: 000055555d206500(0000) GS:ffff8881256ed000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f211ff2a180 CR3: 000000004f6c4000 CR4: 00000000003526f0 Call Trace: call_timer_fn+0x192/0x5a0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1794 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x67e/0x8b0 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:98 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:115 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:140 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline] RIP: 0010:kasan_check_range+0x93/0x2c0 mm/kasan/generic.c:200 Code: 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb <41> 80 3b 00 0f 85 9e 01 00 00 49 ff c3 48 ff c3 75 ee e9 1d 01 00 RSP: 0018:ffffc900000f76e0 EFLAGS: 00000282 RAX: ffffc900000f7b01 RBX: fffffffffffffffe RCX: ffffffff81757f9e RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc900000f7858 RBP: 0000000000000000 R08: ffffc900000f7867 R09: 1ffff9200001ef0c R10: dffffc0000000000 R11: fffff5200001ef0b R12: 0000000000000002 R13: 1ffff9200001ef03 R14: fffff5200001ef0d R15: 1ffff9200001ef0b __asan_memset+0x22/0x50 mm/kasan/shadow.c:84 unwind_next_frame+0xeae/0x23c0 arch/x86/kernel/unwind_orc.c:607 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 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_lru_noprof+0x35f/0x6c0 mm/slub.c:5282 shmem_alloc_inode+0x28/0x40 mm/shmem.c:5152 alloc_inode+0x6a/0x1b0 fs/inode.c:346 new_inode+0x22/0x170 fs/inode.c:1175 __shmem_get_inode mm/shmem.c:3068 [inline] shmem_get_inode+0x347/0xe60 mm/shmem.c:3142 shmem_symlink+0xa3/0x470 mm/shmem.c:4103 vfs_symlink+0x4a1/0x550 fs/namei.c:5523 do_symlinkat+0x1f1/0x3c0 fs/namei.c:5550 __do_sys_symlinkat fs/namei.c:5571 [inline] __se_sys_symlinkat fs/namei.c:5568 [inline] __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:5568 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f211ff99f77 Code: 44 00 00 48 89 f2 31 c9 48 89 fe bf 9c ff ff ff e9 fe f5 ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 0a 01 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:00007fff9148bf88 EFLAGS: 00000202 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f211ff99f77 RDX: 00007f212000ac2a RSI: 00000000ffffff9c RDI: 00007f2120005a6e RBP: 00007fff9148bfcc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000031 R13: 00000000000927c0 R14: 000000000012f03a R15: 00007fff9148c020 ---------------- Code disassembly (best guess): 0: 83 c5 18 add $0x18,%ebp 3: 4c 89 e8 mov %r13,%rax 6: 48 c1 e8 03 shr $0x3,%rax a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) f: 74 08 je 0x19 11: 4c 89 ef mov %r13,%rdi 14: e8 e7 81 a0 00 call 0xa08200 19: 49 8b 75 00 mov 0x0(%r13),%rsi 1d: 49 81 c7 78 01 00 00 add $0x178,%r15 24: 4c 89 f7 mov %r14,%rdi 27: 4c 89 fa mov %r15,%rdx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 83 c4 58 add $0x58,%rsp 33: 5b pop %rbx 34: 41 5c pop %r12 36: 41 5d pop %r13 38: 41 5e pop %r14 3a: 41 5f pop %r15 3c: 5d pop %rbp 3d: e9 .byte 0xe9 3e: 8e .byte 0x8e 3f: 71 .byte 0x71