------------[ cut here ]------------ WARNING: CPU: 1 PID: 41 at kernel/workqueue.c:1441 __queue_work+0xddc/0xf90 kernel/workqueue.c:-1 Modules linked in: CPU: 1 PID: 41 Comm: kworker/u4:2 Not tainted 6.1.134-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: netns cleanup_net RIP: 0010:__queue_work+0xddc/0xf90 kernel/workqueue.c:1441 Code: 8b 3c 24 e8 36 56 88 00 e9 d9 fc ff ff e8 5c f4 30 00 89 ee 48 c7 c7 80 c6 1d 8d e8 de 69 15 03 e9 1e fc ff ff e8 44 f4 30 00 <0f> 0b 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 2e f4 30 00 RSP: 0018:ffffc900001e0af8 EFLAGS: 00010046 RAX: ffffffff8159b60c RBX: 00000000000b0012 RCX: ffff88801b6e1dc0 RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000 RBP: 0000000000010000 R08: ffffffff815aa2a5 R09: fffffbfff1d417ce R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: dffffc0000000000 R14: 0000000000000008 R15: ffff888070328800 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdddf2d078 CR3: 000000002fba5000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504 expire_timers kernel/time/timer.c:1544 [inline] __run_timers+0x6a8/0x890 kernel/time/timer.c:1820 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:661 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:console_emit_next_record+0xa35/0xc30 kernel/printk/printk.c:2786 Code: fc ff df 48 8b 44 24 48 42 80 3c 28 00 44 0f b6 64 24 1f 48 8b 5c 24 30 74 08 48 89 df e8 53 5a 73 00 48 ff 03 4c 8b 7c 24 58 <48> c7 84 24 80 00 00 00 0e 36 e0 45 4b c7 44 3d 00 00 00 00 00 4b RSP: 0018:ffffc90000b27380 EFLAGS: 00000293 RAX: ffffffff816eb1ac RBX: 0000000000000000 RCX: ffff88801b6e1dc0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000b275b0 R08: ffffffff816eb184 R09: fffffbfff225784d R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000046 R15: 1ffff92000164e80 console_flush_all kernel/printk/printk.c:-1 [inline] console_unlock+0x278/0x7c0 kernel/printk/printk.c:2906 vprintk_emit+0x523/0x740 kernel/printk/printk.c:2303 _printk+0xd1/0x111 kernel/printk/printk.c:2328 batadv_hardif_disable_interface+0x292/0x10e0 net/batman-adv/hard-interface.c:827 batadv_softif_destroy_netlink+0x98/0x270 net/batman-adv/soft-interface.c:1092 default_device_exit_batch+0x8ee/0xa20 net/core/dev.c:11486 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x886/0xd20 net/core/net_namespace.c:640 process_one_work+0x917/0x1260 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: df 48 8b fisttps -0x75(%rax) 3: 44 24 48 rex.R and $0x48,%al 6: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) b: 44 0f b6 64 24 1f movzbl 0x1f(%rsp),%r12d 11: 48 8b 5c 24 30 mov 0x30(%rsp),%rbx 16: 74 08 je 0x20 18: 48 89 df mov %rbx,%rdi 1b: e8 53 5a 73 00 call 0x735a73 20: 48 ff 03 incq (%rbx) 23: 4c 8b 7c 24 58 mov 0x58(%rsp),%r15 * 28: 48 c7 84 24 80 00 00 movq $0x45e0360e,0x80(%rsp) <-- trapping instruction 2f: 00 0e 36 e0 45 34: 4b c7 44 3d 00 00 00 movq $0x0,0x0(%r13,%r15,1) 3b: 00 00 3d: 4b rex.WXB