watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.1:16592] Modules linked in: irq event stamp: 2839771 hardirqs last enabled at (2839770): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2839771): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2780482): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2780497): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 16592 Comm: syz-executor.1 Not tainted 6.13.0-rc1-next-20241203 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x5cf/0x2490 Code: 0f b6 34 10 48 8d 41 01 48 89 c7 48 c1 ef 03 0f b6 14 17 48 89 cf 83 e7 07 40 38 fe 40 0f 9e c7 40 84 f6 40 0f 95 c6 40 84 f7 <0f> 85 f0 19 00 00 83 e0 07 38 c2 40 0f 9e c6 84 d2 0f 95 c0 40 84 RSP: 0018:ffff88806ce09768 EFLAGS: 00000246 RAX: ffffffff86ae8fe5 RBX: 0000000000000002 RCX: ffffffff86ae8fe4 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff88806ce09830 R08: ffffffff86ae8fe8 R09: ffff88806ce09818 R10: 000000000003c001 R11: 0000000000095bb6 R12: ffff88806ce09838 R13: ffff88806ce09820 R14: ffff88806ce09ab0 R15: ffff88806ce097d8 FS: 00007feb3b56f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000e000 CR3: 000000002ddd2000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x87/0xf0 stack_trace_save+0x8f/0xc0 set_track_prepare+0x36/0x70 __alloc_object+0xf4/0x270 __create_object+0x1d/0x80 kmem_cache_alloc_node_noprof+0x311/0x3e0 kmalloc_reserve+0x189/0x2b0 __alloc_skb+0x162/0x370 __netdev_alloc_skb+0x7a/0x7c0 __ieee80211_beacon_get+0x3f4/0xfc0 ieee80211_beacon_get_tim+0xa6/0x280 mac80211_hwsim_beacon_tx+0x49b/0x950 __iterate_interfaces+0x2e0/0x650 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x1ab/0xa80 hrtimer_run_softirq+0x14c/0x310 handle_softirqs+0x1b1/0x770 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:qlist_free_all+0x28/0x160 Code: 90 90 48 8b 07 48 85 c0 0f 84 41 01 00 00 41 57 41 56 41 55 49 89 fd 41 54 49 89 f4 55 53 eb 3e 48 63 95 c0 00 00 00 48 8b 18 <48> 89 ef 48 29 d0 48 89 c6 49 89 c6 e8 77 f0 ff ff 49 89 c7 66 90 RSP: 0018:ffff88803f957650 EFLAGS: 00000246 RAX: ffff8880161adb40 RBX: ffff8880161ad600 RCX: ffffea0000586b40 RDX: 0000000000000000 RSI: ffff888008ff03c0 RDI: 0000000000080000 RBP: ffff888008ff03c0 R08: ffff8880161ade40 R09: 00000000002a000e R10: ffffea0000586b00 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88803f957688 R14: ffff8880161ade40 R15: ffff8880161ade40 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 __alloc_object+0x2f/0x270 __create_object+0x1d/0x80 kmem_cache_alloc_noprof+0x300/0x3d0 alloc_buffer_head+0x24/0x130 folio_alloc_buffers+0x289/0x540 create_empty_buffers+0x30/0x460 ext4_block_write_begin+0x996/0xb20 ext4_da_write_begin+0x30e/0x880 generic_perform_write+0x284/0x7e0 ext4_buffered_write_iter+0x11d/0x3c0 ext4_file_write_iter+0x95e/0x18e0 vfs_write+0xbdb/0x10a0 ksys_write+0x122/0x240 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7feb3dff9b19 Code: ff ff c3 66 2e 0f 1f 84 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007feb3b56f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007feb3e10cf60 RCX: 00007feb3dff9b19 RDX: 00000000000292e9 RSI: 0000000020000080 RDI: 0000000000000009 RBP: 00007feb3e053f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd00ba7b6f R14: 00007feb3b56f300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0x1e/0x30 ---------------- Code disassembly (best guess): 0: 0f b6 34 10 movzbl (%rax,%rdx,1),%esi 4: 48 8d 41 01 lea 0x1(%rcx),%rax 8: 48 89 c7 mov %rax,%rdi b: 48 c1 ef 03 shr $0x3,%rdi f: 0f b6 14 17 movzbl (%rdi,%rdx,1),%edx 13: 48 89 cf mov %rcx,%rdi 16: 83 e7 07 and $0x7,%edi 19: 40 38 fe cmp %dil,%sil 1c: 40 0f 9e c7 setle %dil 20: 40 84 f6 test %sil,%sil 23: 40 0f 95 c6 setne %sil 27: 40 84 f7 test %sil,%dil * 2a: 0f 85 f0 19 00 00 jne 0x1a20 <-- trapping instruction 30: 83 e0 07 and $0x7,%eax 33: 38 c2 cmp %al,%dl 35: 40 0f 9e c6 setle %sil 39: 84 d2 test %dl,%dl 3b: 0f 95 c0 setne %al 3e: 40 rex 3f: 84 .byte 0x84