audit: type=1400 audit(1750440306.156:93): avc: denied { read } for pid=4193 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:4179] Modules linked in: irq event stamp: 3846115 hardirqs last enabled at (3846114): [] asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:661 hardirqs last disabled at (3846115): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (3669662): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (3669669): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 4179 Comm: syz-executor.3 Not tainted 5.10.238 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__read_once_word_nocheck+0x3/0x10 include/asm-generic/rwonce.h:68 Code: 0a fe ff ff e8 fe 5a 5c 00 e9 bf fd ff ff e8 f4 5a 5c 00 e9 8c fd ff ff e8 ea 5a 5c 00 e9 44 fd ff ff cc cc cc cc cc 48 8b 07 88 c4 0f 03 0f 1f 84 00 00 00 00 00 41 57 89 d0 41 56 41 55 41 RSP: 0018:ffff88806cf089c0 EFLAGS: 00000297 RAX: ffffffff84000d02 RBX: ffff88806cf08b18 RCX: ffff88806cf08b18 RDX: dffffc0000000000 RSI: ffff888017e9f610 RDI: ffff888017e9f610 RBP: ffff888017e9f610 R08: ffffffff85d42e37 R09: ffff888017e9f618 R10: 0000000000032042 R11: 1ffff1100d9e1147 R12: ffff88806cf08ad0 R13: ffff888017e98000 R14: 1ffff1100d9e1147 R15: ffffffff85d42e36 FS: 00007feb9762a700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7ad0e40fc8 CR3: 000000003a1d6000 CR4: 0000000000350ee0 Call Trace: deref_stack_reg+0xf2/0x160 arch/x86/kernel/unwind_orc.c:360 unwind_next_frame+0xbf8/0x1a90 arch/x86/kernel/unwind_orc.c:536 arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc9/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] kmem_cache_alloc_node+0x14b/0x330 mm/slub.c:2932 __alloc_skb+0x6d/0x5b0 net/core/skbuff.c:200 skb_copy+0x183/0x350 net/core/skbuff.c:1530 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb50/0x1410 drivers/net/wireless/mac80211_hwsim.c:1499 mac80211_hwsim_tx+0x574/0x12a0 drivers/net/wireless/mac80211_hwsim.c:1603 drv_tx net/mac80211/driver-ops.h:35 [inline] ieee80211_tx_frags+0x59c/0x9f0 net/mac80211/tx.c:1699 __ieee80211_tx+0x1ad/0x640 net/mac80211/tx.c:1755 ieee80211_tx+0x329/0x410 net/mac80211/tx.c:1938 ieee80211_xmit+0x220/0x2a0 net/mac80211/tx.c:2031 __ieee80211_subif_start_xmit+0x752/0xca0 net/mac80211/tx.c:4062 ieee80211_subif_start_xmit+0xef/0xf70 net/mac80211/tx.c:4198 __netdev_start_xmit include/linux/netdevice.h:4824 [inline] netdev_start_xmit include/linux/netdevice.h:4838 [inline] xmit_one net/core/dev.c:3601 [inline] dev_hard_start_xmit+0x1cb/0x6f0 net/core/dev.c:3617 sch_direct_xmit+0x25f/0x790 net/sched/sch_generic.c:336 qdisc_restart net/sched/sch_generic.c:401 [inline] __qdisc_run+0x4aa/0x1570 net/sched/sch_generic.c:409 qdisc_run include/net/pkt_sched.h:127 [inline] qdisc_run include/net/pkt_sched.h:124 [inline] __dev_xmit_skb net/core/dev.c:3812 [inline] __dev_queue_xmit+0xd43/0x2690 net/core/dev.c:4168 neigh_hh_output include/net/neighbour.h:493 [inline] neigh_output include/net/neighbour.h:507 [inline] ip6_finish_output2+0x158f/0x1cf0 net/ipv6/ip6_output.c:130 __ip6_finish_output.part.0+0x4f7/0xbc0 net/ipv6/ip6_output.c:201 __ip6_finish_output net/ipv6/ip6_output.c:186 [inline] ip6_finish_output net/ipv6/ip6_output.c:211 [inline] NF_HOOK_COND include/linux/netfilter.h:285 [inline] ip6_output+0x302/0x9e0 net/ipv6/ip6_output.c:234 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:296 [inline] ndisc_send_skb+0xa97/0x1cd0 net/ipv6/ndisc.c:513 ndisc_send_rs+0x131/0x560 net/ipv6/ndisc.c:707 addrconf_rs_timer+0x2ec/0x790 net/ipv6/addrconf.c:3935 call_timer_fn+0x182/0x4a0 kernel/time/timer.c:1444 expire_timers kernel/time/timer.c:1489 [inline] __run_timers.part.0+0x667/0x9a0 kernel/time/timer.c:1783 __run_timers kernel/time/timer.c:1761 [inline] run_timer_softirq+0x80/0x120 kernel/time/timer.c:1796 __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:qlink_free mm/kasan/quarantine.c:151 [inline] RIP: 0010:qlist_free_all+0x3f/0xe0 mm/kasan/quarantine.c:170 Code: a3 00 00 00 49 89 fc 41 bd 00 00 00 80 49 c7 c6 00 00 00 80 48 bd 00 00 00 00 00 fc ff df eb 2c 48 63 87 c0 00 00 00 4c 8b 3e <48> c7 c2 55 d9 6c 81 48 29 c6 48 89 f0 48 c1 e8 03 c6 04 28 fb e8 RSP: 0018:ffff888017e9f6c0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffea0001237a00 RDX: 0000000000000001 RSI: ffff888048dee600 RDI: ffff8880083fadc0 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff816cd900 R10: ffff88800ec3e820 R11: 0000000000000001 R12: ffff888017e9f6f8 R13: 0000000080000000 R14: ffffffff80000000 R15: ffff88800ec3e340 quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:267 __kasan_kmalloc.constprop.0+0xa2/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] __kmalloc_track_caller+0x159/0x370 mm/slub.c:4465 kmemdup_nul+0x2d/0xa0 mm/util.c:151 match_strdup lib/parser.c:323 [inline] match_number+0xaf/0x1d0 lib/parser.c:134 parse_opts.part.0+0x1f3/0x340 net/9p/trans_fd.c:785 parse_opts net/9p/trans_fd.c:767 [inline] p9_fd_create+0x98/0x4a0 net/9p/trans_fd.c:1078 p9_client_create+0x7ff/0x1230 net/9p/client.c:1045 v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406 v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126 legacy_get_tree+0x105/0x220 fs/fs_context.c:593 vfs_get_tree+0x8e/0x300 fs/super.c:1572 do_new_mount fs/namespace.c:2915 [inline] path_mount+0x1429/0x2120 fs/namespace.c:3245 do_mount fs/namespace.c:3258 [inline] __do_sys_mount fs/namespace.c:3466 [inline] __se_sys_mount fs/namespace.c:3443 [inline] __x64_sys_mount+0x282/0x300 fs/namespace.c:3443 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7feb9a0d5b19 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:00007feb9762a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007feb9a1e9020 RCX: 00007feb9a0d5b19 RDX: 0000000020000380 RSI: 0000000020000340 RDI: 0000000000000000 RBP: 00007feb9a12ff6d R08: 0000000020000940 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce2211f2f R14: 00007feb9762a300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.238 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:19 [inline] RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:100 [inline] RIP: 0010:queued_spin_lock_slowpath+0x122/0x8c0 kernel/locking/qspinlock.c:326 Code: 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 09 07 00 00 48 81 c4 88 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 f0 80 f8 02 f3 90 73 ff ff ff 44 8b 74 24 48 41 81 fe 00 01 00 00 0f 84 e1 00 00 RSP: 0018:ffff88806ce09a38 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffffffff87a0a080 RCX: ffffffff8127be57 RDX: fffffbfff0f41411 RSI: 0000000000000004 RDI: ffffffff87a0a080 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff87a0a083 R10: fffffbfff0f41410 R11: 0000000000000001 R12: 0000000000000003 R13: fffffbfff0f41410 R14: 0000000000000001 R15: 1ffff1100d9c1348 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f606a757010 CR3: 0000000016fe0000 CR4: 0000000000350ef0 Call Trace: queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock+0x1dc/0x260 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:354 [inline] mac80211_hwsim_tx_frame_no_nl.isra.0+0x6c8/0x1410 drivers/net/wireless/mac80211_hwsim.c:1450 mac80211_hwsim_tx_frame+0x152/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1716 mac80211_hwsim_beacon_tx+0x494/0x940 drivers/net/wireless/mac80211_hwsim.c:1770 __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:1588 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1652 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1669 __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:default_idle+0xe/0x20 arch/x86/kernel/process.c:712 Code: 4e ff ff ff 4c 89 e7 e8 90 a2 83 fd eb 8f 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 e9 07 00 00 00 0f 00 2d 24 0c 59 00 fb f4 1d 0c 37 00 cc cc cc cc cc cc cc cc cc cc cc cc cc 41 55 41 54 RSP: 0018:ffffffff84e07e38 EFLAGS: 00000206 RAX: ffffffff83e93390 RBX: 0000000000000000 RCX: ffffffff83e7af2c RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e93998 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88806ce3c12b R10: ffffed100d9c7825 R11: 0000000000000001 R12: 0000000000000000 R13: ffffffff85678908 R14: 0000000000000000 R15: dffffc0000000000 default_idle_call+0xbf/0x2c0 kernel/sched/idle.c:112 cpuidle_idle_call kernel/sched/idle.c:194 [inline] do_idle+0x3b3/0x520 kernel/sched/idle.c:306 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:402 start_kernel+0x464/0x489 init/main.c:1046 secondary_startup_64_no_verify+0xbe/0xcb 9pnet: Insufficient options for proto=fd ---------------- Code disassembly (best guess), 4 bytes skipped: 0: e8 fe 5a 5c 00 callq 0x5c5b03 5: e9 bf fd ff ff jmpq 0xfffffdc9 a: e8 f4 5a 5c 00 callq 0x5c5b03 f: e9 8c fd ff ff jmpq 0xfffffda0 14: e8 ea 5a 5c 00 callq 0x5c5b03 19: e9 44 fd ff ff jmpq 0xfffffd62 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: cc int3 23: 48 8b 07 mov (%rdi),%rax * 26: e9 88 c4 0f 03 jmpq 0x30fc4b3 <-- trapping instruction 2b: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 32: 00 33: 41 57 push %r15 35: 89 d0 mov %edx,%eax 37: 41 56 push %r14 39: 41 55 push %r13 3b: 41 rex.B