watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.6:3982] Modules linked in: irq event stamp: 5308979 hardirqs last enabled at (5308978): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (5308979): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (5294218): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (5294221): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 3982 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:on_stack arch/x86/include/asm/stacktrace.h:50 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:347 [inline] RIP: 0010:deref_stack_reg+0x99/0x160 arch/x86/kernel/unwind_orc.c:357 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 9c 00 00 00 49 8b 44 24 10 49 39 ed 77 13 48 39 e8 76 0e 48 8d 55 08 48 39 d0 72 05 <49> 39 d5 72 3f 49 8d 7c 24 28 49 8d 4c 24 20 48 b8 00 00 00 00 00 RSP: 0018:ffff88806cf09638 EFLAGS: 00000216 RAX: ffff888045368000 RBX: ffff88806cf09780 RCX: ffffffff85a04e06 RDX: ffff8880453678b8 RSI: ffff8880453678b0 RDI: ffff88806cf09750 RBP: ffff8880453678b0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000032042 R11: 1ffff1100d9e12d5 R12: ffff88806cf09740 R13: ffff888045360000 R14: 1ffff1100d9e12d5 R15: ffffffff85a04e0a FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f90c13aa840 CR3: 0000000044e82000 CR4: 0000000000350ee0 Call Trace: unwind_next_frame+0x1289/0x1a90 arch/x86/kernel/unwind_orc.c:589 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:199 __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:bytes_is_nonzero mm/kasan/generic.c:90 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:183 [inline] RIP: 0010:check_memory_region+0x182/0x1f0 mm/kasan/generic.c:192 Code: ff ff ff 48 89 d0 49 39 c2 75 92 49 0f be 02 41 83 e1 07 49 39 c1 7d 85 41 bb 01 00 00 00 5b 5d 44 89 d8 41 5c e9 5e 8d b3 02 <48> 85 d2 74 e9 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 db 80 38 00 RSP: 0018:ffff888045367740 EFLAGS: 00000283 RAX: ffffed1001eb8cbc RBX: ffffed1001eb8cbd RCX: ffffffff81600764 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88800f5c65e0 RBP: ffffed1001eb8cbc R08: 0000000000000001 R09: ffff88800f5c65e7 R10: ffffed1001eb8cbc R11: 0000000000000001 R12: fffffffffffffffb R13: ffff88800f5c65e0 R14: dffffc0000000000 R15: fffffffffffffffb instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic64_add_return include/asm-generic/atomic-instrumented.h:882 [inline] atomic_long_add_return include/asm-generic/atomic-long.h:59 [inline] add_mm_counter include/linux/mm.h:1910 [inline] add_mm_rss_vec mm/memory.c:491 [inline] zap_pte_range mm/memory.c:1339 [inline] zap_pmd_range mm/memory.c:1404 [inline] zap_pud_range mm/memory.c:1433 [inline] zap_p4d_range mm/memory.c:1454 [inline] unmap_page_range+0x12e4/0x1fe0 mm/memory.c:1475 unmap_single_vma+0x198/0x300 mm/memory.c:1520 unmap_vmas+0x16d/0x300 mm/memory.c:1552 exit_mmap+0x27f/0x4f0 mm/mmap.c:3235 __mmput kernel/fork.c:1101 [inline] mmput+0xca/0x340 kernel/fork.c:1122 exit_mm kernel/exit.c:536 [inline] do_exit+0xa96/0x2600 kernel/exit.c:847 do_group_exit+0x125/0x310 kernel/exit.c:982 get_signal+0x4bc/0x2350 kernel/signal.c:2762 arch_do_signal_or_restart+0x2b7/0x1990 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x1d0 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f59e3f87b19 Code: Unable to access opcode bytes at RIP 0x7f59e3f87aef. RSP: 002b:00007f59e14fd188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: 0000000000000007 RBX: 00007f59e409af60 RCX: 00007f59e3f87b19 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007f59e3fe1f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1aceebaf R14: 00007f59e14fd300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:706 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ---------------- Code disassembly (best guess): 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 0f 85 9c 00 00 00 jne 0xae 12: 49 8b 44 24 10 mov 0x10(%r12),%rax 17: 49 39 ed cmp %rbp,%r13 1a: 77 13 ja 0x2f 1c: 48 39 e8 cmp %rbp,%rax 1f: 76 0e jbe 0x2f 21: 48 8d 55 08 lea 0x8(%rbp),%rdx 25: 48 39 d0 cmp %rdx,%rax 28: 72 05 jb 0x2f * 2a: 49 39 d5 cmp %rdx,%r13 <-- trapping instruction 2d: 72 3f jb 0x6e 2f: 49 8d 7c 24 28 lea 0x28(%r12),%rdi 34: 49 8d 4c 24 20 lea 0x20(%r12),%rcx 39: 48 rex.W 3a: b8 00 00 00 00 mov $0x0,%eax