------------[ cut here ]------------ workqueue: cannot queue hci_cmd_timeout on wq hci4 WARNING: CPU: 1 PID: 8619 at kernel/workqueue.c:2258 __queue_work+0xdff/0x10a0 kernel/workqueue.c:2256 Modules linked in: CPU: 1 UID: 0 PID: 8619 Comm: syz.7.7256 Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__queue_work+0xdff/0x10a0 kernel/workqueue.c:2256 Code: e8 03 80 3c 28 00 74 08 4c 89 ff e8 6b 67 a1 00 49 8b 37 49 81 c5 78 01 00 00 48 c7 c7 60 d7 29 8c 4c 89 ea e8 e2 60 f8 ff 90 <0f> 0b 90 90 e9 5d f4 ff ff e8 43 48 39 00 90 0f 0b 90 e9 a7 fc ff RSP: 0018:ffffc90000a08ae8 EFLAGS: 00010046 RAX: 451465ce01044800 RBX: 0000000000000100 RCX: ffff8880395c3c00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff81827e02 R09: 1ffff110170e47d2 R10: dffffc0000000000 R11: ffffed10170e47d3 R12: 1ffff1100b0e8f38 R13: ffff888058747978 R14: 0000000000000008 R15: ffff88805c194948 FS: 00007fa2c15e46c0(0000) GS:ffff888125324000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4eb8737378 CR3: 00000000276d0000 CR4: 00000000003526f0 Call Trace: <IRQ> call_timer_fn+0x189/0x650 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1835 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x699/0x8e0 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x40 kernel/rcu/update.c:319 Code: 2b 8e 48 c7 c6 2f fa 2b 8e e8 3c d4 67 f5 90 0f 0b 90 90 90 eb c6 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 31 c0 83 3d 37 57 22 04 00 74 1e 83 3d da 88 22 04 00 RSP: 0018:ffffc90011276ab0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88806c4e8800 RCX: 0000000080000000 RDX: 0000000000000000 RSI: ffffffff8e2bf2b2 RDI: ffffffff8c80eea0 RBP: 1ffff1100f595b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff8880395c3c2c R15: dffffc0000000000 rcu_read_lock_held_common kernel/rcu/update.c:105 [inline] rcu_read_lock_held+0xa/0x50 kernel/rcu/update.c:349 task_css include/linux/cgroup.h:435 [inline] mem_cgroup_from_task+0x9a/0x120 mm/memcontrol.c:892 get_mem_cgroup_from_mm+0xd7/0x2a0 mm/memcontrol.c:945 __mem_cgroup_charge+0x16/0x80 mm/memcontrol.c:4513 mem_cgroup_charge include/linux/memcontrol.h:644 [inline] shmem_alloc_and_add_folio+0x891/0x1070 mm/shmem.c:1912 shmem_get_folio_gfp+0x655/0x1800 mm/shmem.c:2545 shmem_get_folio mm/shmem.c:2651 [inline] shmem_write_begin+0x17e/0x3a0 mm/shmem.c:3301 generic_perform_write+0x329/0xa10 mm/filemap.c:4102 shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3477 __kernel_write_iter+0x439/0x990 fs/read_write.c:617 dump_emit_page fs/coredump.c:885 [inline] dump_user_range+0x94a/0xf90 fs/coredump.c:959 elf_core_dump+0x409d/0x4ae0 fs/binfmt_elf.c:2128 do_coredump+0x22c3/0x3260 fs/coredump.c:759 get_signal+0x13ed/0x1730 kernel/signal.c:3020 arch_do_signal_or_restart+0x98/0x840 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] irqentry_exit_to_user_mode+0x7e/0x250 kernel/entry/common.c:231 exc_general_protection+0x419/0x5d0 arch/x86/kernel/traps.c:791 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:617 RIP: 0033:0x7fa2c078d171 Code: 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:00002000000000b0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fa2c09a5fa0 RCX: 00007fa2c078d169 RDX: 00002000000000c0 RSI: 00002000000000b0 RDI: 0000000000000400 RBP: 00007fa2c080e2a0 R08: 0000200000000140 R09: 0000200000000140 R10: 0000200000000100 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa2c09a5fa0 R15: 00007fa2c0acfa28 </TASK> ---------------- Code disassembly (best guess): 0: 2b 8e 48 c7 c6 2f sub 0x2fc6c748(%rsi),%ecx 6: fa cli 7: 2b 8e e8 3c d4 67 sub 0x67d43ce8(%rsi),%ecx d: f5 cmc e: 90 nop f: 0f 0b ud2 11: 90 nop 12: 90 nop 13: 90 nop 14: eb c6 jmp 0xffffffdc 16: 0f 1f 40 00 nopl 0x0(%rax) 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 90 nop 29: 90 nop * 2a: f3 0f 1e fa endbr64 <-- trapping instruction 2e: 31 c0 xor %eax,%eax 30: 83 3d 37 57 22 04 00 cmpl $0x0,0x4225737(%rip) # 0x422576e 37: 74 1e je 0x57 39: 83 3d da 88 22 04 00 cmpl $0x0,0x42288da(%rip) # 0x422891a