watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.6:4058] Modules linked in: irq event stamp: 4550383 hardirqs last enabled at (4550382): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4550383): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (4527218): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4527221): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4058 Comm: syz-executor.6 Not tainted 5.10.229 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_get_return_address arch/x86/kernel/unwind_orc.c:323 [inline] RIP: 0010:unwind_get_return_address+0x6e/0xa0 arch/x86/kernel/unwind_orc.c:318 Code: ea 03 80 3c 02 00 75 36 48 8b 7b 48 e8 6b 68 0b 00 85 c0 74 cf 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 <75> 1c 48 8b 43 48 5b 5d e9 b5 cf 0f 03 e8 40 44 5c 00 eb a0 48 89 RSP: 0018:ffff88806ce09928 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff88806ce09940 RCX: 1ffff1100d9c1301 RDX: 1ffff1100d9c1331 RSI: ffff88806ce09fc8 RDI: ffffffff84001092 RBP: ffff88806ce09988 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9c1315 R12: ffff88806ce099f8 R13: 0000000000000000 R14: ffff888017da1a40 R15: ffff8880488edc00 FS: 00007f19c38e0700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001d80 CR3: 0000000018396000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x99/0xf0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 __save_stack_trace mm/kmemleak.c:563 [inline] create_object.isra.0+0x372/0xa20 mm/kmemleak.c:618 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] __kmalloc_node_track_caller+0x1a6/0x3b0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:143 [inline] __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:211 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:447 netdev_alloc_skb include/linux/skbuff.h:2854 [inline] dev_alloc_skb include/linux/skbuff.h:2867 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4876 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4990 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x940 drivers/net/wireless/mac80211_hwsim.c:1740 __iterate_interfaces+0x1f0/0x550 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x71/0x1c0 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1586 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1650 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1667 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:rtnl_fill_ifinfo+0x1250/0x3fa0 net/core/rtnetlink.c:1789 Code: be fe ff 31 ff 89 c3 89 c6 e8 ac b3 21 fe 85 db 0f 85 79 fd ff ff e8 4f ba 21 fe 4c 89 f6 4c 89 ff e8 24 c0 fe ff 31 ff 89 c3 <89> c6 e8 89 b3 21 fe 85 db 0f 85 56 fd ff ff e8 2c ba 21 fe 8b 94 RSP: 0018:ffff8880465c7940 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900033f5000 RDX: 0000000000040000 RSI: ffffffff831dccf2 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888045fee220 R10: 0000000000000220 R11: 0000000000000001 R12: ffff8880465c7a00 R13: ffff8880465c7a10 R14: ffff8880467d2000 R15: ffff88800d21adc0 rtmsg_ifinfo_build_skb+0xd1/0x1a0 net/core/rtnetlink.c:3845 rtmsg_ifinfo_event net/core/rtnetlink.c:3877 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:3868 [inline] rtmsg_ifinfo+0x83/0x120 net/core/rtnetlink.c:3886 __dev_notify_flags+0x22a/0x2c0 net/core/dev.c:8560 dev_change_flags+0x100/0x160 net/core/dev.c:8602 dev_ifsioc+0x5b9/0xa00 net/core/dev_ioctl.c:230 dev_ioctl+0x23c/0xd30 net/core/dev_ioctl.c:481 sock_do_ioctl+0x17d/0x300 net/socket.c:1089 sock_ioctl+0x3ea/0x700 net/socket.c:1206 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x19a/0x210 fs/ioctl.c:739 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f19c636ab19 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:00007f19c38e0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f19c647df60 RCX: 00007f19c636ab19 RDX: 0000000020000140 RSI: 0000000000008914 RDI: 0000000000000005 RBP: 00007f19c63c4f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd6da871af R14: 00007f19c38e0300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:706 kauditd_printk_skb: 9 callbacks suppressed audit: type=1326 audit(1731319820.802:28): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4109 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f992ec1fb19 code=0x0 audit: type=1400 audit(1731319820.811:29): avc: denied { read } for pid=4109 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 audit: type=1326 audit(1731319821.855:30): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4109 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f992ec1fb19 code=0x0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 03 80 3c 02 00 75 add 0x7500023c(%rax),%eax 6: 36 48 8b 7b 48 mov %ss:0x48(%rbx),%rdi b: e8 6b 68 0b 00 callq 0xb687b 10: 85 c0 test %eax,%eax 12: 74 cf je 0xffffffe3 14: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1b: fc ff df 1e: 48 89 ea mov %rbp,%rdx 21: 48 c1 ea 03 shr $0x3,%rdx 25: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 29: 75 1c jne 0x47 <-- trapping instruction 2b: 48 8b 43 48 mov 0x48(%rbx),%rax 2f: 5b pop %rbx 30: 5d pop %rbp 31: e9 b5 cf 0f 03 jmpq 0x30fcfeb 36: e8 40 44 5c 00 callq 0x5c447b 3b: eb a0 jmp 0xffffffdd 3d: 48 rex.W 3e: 89 .byte 0x89