audit: type=1326 audit(1730711012.586:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=13258 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f1dc6b94b19 code=0x0 watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.5:13229] Modules linked in: irq event stamp: 2882311 hardirqs last enabled at (2882310): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2882311): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2828832): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2828835): [] irq_exit_rcu+0x94/0xc0 CPU: 0 UID: 0 PID: 13229 Comm: syz-executor.5 Not tainted 6.12.0-rc5-next-20241104 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__copy_skb_header+0x2/0x5a0 Code: 1a fd fd e9 a6 fe ff ff e8 8b 1a fd fd e9 c5 fe ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 56 <41> 55 41 54 55 48 89 f5 53 48 89 fb e8 fd 3c c3 fd 48 8d 7d 20 48 RSP: 0018:ffff88806ce09ad0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888014c3bdc0 RCX: ffffffff838eb16d RDX: ffff88803c875280 RSI: ffff888014c3bc80 RDI: ffff888014c3bdc0 RBP: ffff888014c3bc80 R08: 01032418120c968b R09: 3004320000020601 R10: 0000000000000000 R11: 00010002f2500007 R12: ffff888014c3bdc0 R13: ffff888014c3bcf0 R14: 0000000000000000 R15: ffff888014c3bcf0 FS: 00007f75dff6a700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd80f85e7e0 CR3: 0000000007222000 CR4: 0000000000350ef0 Call Trace: skb_copy_header+0x20/0x2b0 skb_copy+0x2f1/0x3b0 mac80211_hwsim_tx_frame_no_nl.isra.0+0xafb/0x1320 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x546/0x950 __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+0x94/0xc0 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:free_unref_page_commit+0xa/0xd40 Code: 5d 41 5c 41 5d 41 5e 41 5f e9 92 ed 02 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 b8 00 00 00 00 00 fc ff df <41> 57 41 89 cf 44 89 c1 41 56 41 55 49 89 d5 41 54 49 89 f4 55 48 RSP: 0018:ffff8880410777f0 EFLAGS: 00000286 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000002 RDX: ffffea000068e880 RSI: ffff88806ce41500 RDI: ffff88807ffdcb80 RBP: ffff88806ce41500 R08: 0000000000000000 R09: fffffbfff0fdc5e4 R10: ffffffff87ee2f27 R11: 0000000000000000 R12: ffff88807ffdcb80 R13: 000000000001a3a2 R14: 0000000000000000 R15: ffffea000068e880 free_unref_page+0x55e/0xc40 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19f/0x240 __kasan_kmalloc+0x6f/0x90 __kmalloc_noprof+0x1f7/0x4b0 security_prepare_creds+0x101/0x160 prepare_creds+0x54e/0x760 copy_creds+0x7a/0xa20 copy_process+0xf57/0x8e60 kernel_clone+0xeb/0x850 __do_sys_clone3+0x1d9/0x260 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f75e29f4b19 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:00007f75dff6a188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f75e2b07f60 RCX: 00007f75e29f4b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f75e2a4ef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc8b59065f R14: 00007f75dff6a300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.0-rc5-next-20241104 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:queued_spin_lock_slowpath+0x242/0xb60 Code: 02 48 89 e8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 85 08 00 00 b8 01 00 00 00 66 89 45 00 e9 bf fe ff ff 89 44 24 38 f3 90 5b fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 RSP: 0018:ffff88806cf099e8 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8485c27f RDX: fffffbfff0c1b4d5 RSI: 0000000000000004 RDI: ffffffff860da6a0 RBP: ffffffff860da6a0 R08: 0000000000000000 R09: fffffbfff0c1b4d4 R10: ffffffff860da6a3 R11: 5050505000000011 R12: 1ffff1100d9e133e R13: 0000000000000003 R14: fffffbfff0c1b4d4 R15: ffff88806cf09a20 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b624395898 CR3: 0000000016a42000 CR4: 0000000000350ef0 Call Trace: do_raw_spin_lock+0x1de/0x270 mac80211_hwsim_tx_frame_no_nl.isra.0+0x6d1/0x1320 mac80211_hwsim_tx_frame+0x1ee/0x2a0 mac80211_hwsim_beacon_tx+0x546/0x950 __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+0x94/0xc0 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:default_idle+0x1e/0x30 Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 eb 0c 0f 1f 44 00 00 0f 00 2d a9 df 3e 00 0f 1f 44 00 00 fb f4 e9 1c 2e 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffff8880096c7e68 EFLAGS: 00000202 RAX: 00000000001205f1 RBX: 0000000000000001 RCX: ffffffff84839b17 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff812ae2ca RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9e6cba R10: ffff88806cf365d3 R11: 0000000000000000 R12: ffffffff863f7790 R13: 1ffff110012d8fd2 R14: 0000000000000000 R15: 0000000000000000 default_idle_call+0x6d/0xb0 do_idle+0x2fa/0x3b0 cpu_startup_entry+0x4f/0x60 start_secondary+0x1c1/0x220 common_startup_64+0x12c/0x138 ---------------- Code disassembly (best guess): 0: 1a fd sbb %ch,%bh 2: fd std 3: e9 a6 fe ff ff jmpq 0xfffffeae 8: e8 8b 1a fd fd callq 0xfdfd1a98 d: e9 c5 fe ff ff jmpq 0xfffffed7 12: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 18: 90 nop 19: 90 nop 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: 41 56 push %r14 * 2a: 41 55 push %r13 <-- trapping instruction 2c: 41 54 push %r12 2e: 55 push %rbp 2f: 48 89 f5 mov %rsi,%rbp 32: 53 push %rbx 33: 48 89 fb mov %rdi,%rbx 36: e8 fd 3c c3 fd callq 0xfdc33d38 3b: 48 8d 7d 20 lea 0x20(%rbp),%rdi 3f: 48 rex.W