watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.3:8279] Modules linked in: irq event stamp: 2181745 hardirqs last enabled at (2181744): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2181745): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2176258): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2176277): [] __irq_exit_rcu+0xc4/0x100 CPU: 1 UID: 0 PID: 8279 Comm: syz-executor.3 Not tainted 6.12.0-rc7-next-20241115 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:fs_reclaim_acquire+0x41/0x150 Code: 53 89 fb 48 8d 7d 2c 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f2 00 00 00 8b 45 2c 00 00 0c 10 0f 85 b9 00 00 00 f6 c7 04 0f 84 87 00 00 00 65 48 RSP: 0018:ffff88806cf09a28 EFLAGS: 00000246 RAX: 0000000000400140 RBX: 0000000000000820 RCX: ffffffff838f546e RDX: 0000000000000000 RSI: 0000000000000820 RDI: ffff88801374802c RBP: ffff888013748000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000c3893 R12: ffff88800969f280 R13: 0000000000000820 R14: 00000000ffffffff R15: 0000000000000820 FS: 00007f167fa28700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ea2b000 CR3: 0000000015386000 CR4: 0000000000350ef0 Call Trace: kmem_cache_alloc_node_noprof+0x52/0x3e0 __alloc_skb+0x2ad/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/0xa70 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:put_cpu_partial+0x10a/0x1b0 Code: 24 28 75 5b 49 c7 44 24 28 00 00 00 00 4c 89 e7 48 8d 35 00 00 00 00 e8 14 9a ab ff 4d 85 ed 74 06 e8 8a 62 d5 ff fb 4d 85 f6 <74> 1c 5b 4c 89 f6 48 89 ef 5d 41 5c 41 5d 41 5e e9 c1 fa ff ff 44 RSP: 0018:ffff88803e2f7990 EFLAGS: 00000246 RAX: 0000000000213513 RBX: ffffea0000278a00 RCX: 1ffffffff0fdfeb6 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81849d96 RBP: ffff888008c4f780 R08: 0000000000000001 R09: fffffbfff0fdddf1 R10: ffffffff87eeef8f R11: 00000000000007e0 R12: ffff88806cf40350 R13: 0000000000000200 R14: 0000000000000000 R15: ffff888009e28b90 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 vm_area_dup+0x52/0x160 copy_process+0x78e3/0x8e90 kernel_clone+0xeb/0x850 __do_sys_fork+0x80/0xc0 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f16824b2b19 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:00007f167fa28188 EFLAGS: 00000246 ORIG_RAX: 0000000000000039 RAX: ffffffffffffffda RBX: 00007f16825c5f60 RCX: 00007f16824b2b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f168250cf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff77588eff R14: 00007f167fa28300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at default_idle+0x1e/0x30 ---------------- Code disassembly (best guess): 0: 53 push %rbx 1: 89 fb mov %edi,%ebx 3: 48 8d 7d 2c lea 0x2c(%rbp),%rdi 7: 48 89 fa mov %rdi,%rdx a: 48 c1 ea 03 shr $0x3,%rdx e: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 12: 48 89 f8 mov %rdi,%rax 15: 83 e0 07 and $0x7,%eax 18: 83 c0 03 add $0x3,%eax 1b: 38 d0 cmp %dl,%al 1d: 7c 08 jl 0x27 1f: 84 d2 test %dl,%dl 21: 0f 85 f2 00 00 00 jne 0x119 27: 8b 45 2c mov 0x2c(%rbp),%eax * 2a: a9 00 00 0c 10 test $0x100c0000,%eax <-- trapping instruction 2f: 0f 85 b9 00 00 00 jne 0xee 35: f6 c7 04 test $0x4,%bh 38: 0f 84 87 00 00 00 je 0xc5 3e: 65 gs 3f: 48 rex.W