netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:31237] Modules linked in: irq event stamp: 2912295 hardirqs last enabled at (2912294): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (2912294): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (2912295): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2899044): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2899047): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2899047): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 31237 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_is_held_type+0x17a/0x210 kernel/locking/lockdep.c:3948 Code: 00 00 00 00 fc ff df c7 85 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 75 63 48 83 3d 45 cc a6 08 00 74 2c 48 89 df 57 9d <0f> 1f 44 00 00 48 83 c4 08 44 89 e0 5b 5d 41 5c c3 48 83 c4 08 41 RSP: 0018:ffff8880ba007cd8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: 0000000000000286 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: 0000000000000286 RBP: ffff888027c20340 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000001 R13: 000000000000000c R14: ffff888025c84000 R15: ffff888024f7d540 FS: 00007f9d0fcda700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ae9eb87740 CR3: 0000000009e6d000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_rx_monitor net/mac80211/rx.c:724 [inline] ieee80211_rx_napi+0x13e0/0x2470 net/mac80211/rx.c:4662 ieee80211_rx include/net/mac80211.h:4109 [inline] ieee80211_tasklet_handler+0x101/0x160 net/mac80211/main.c:229 tasklet_action_common.constprop.0+0x265/0x360 kernel/softirq.c:522 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:zap_pte_range mm/memory.c:1350 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1463 [inline] RIP: 0010:zap_pud_range mm/memory.c:1492 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1513 [inline] RIP: 0010:unmap_page_range+0x1473/0x2c50 mm/memory.c:1534 Code: 98 48 89 f8 48 c1 e8 03 42 0f b6 14 30 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 39 15 00 00 83 ac 9c 00 01 00 00 01 <31> f6 4c 89 ef e8 a3 92 04 00 4c 89 e8 48 c1 e8 03 42 80 3c 30 00 RSP: 0018:ffff88801ba0f770 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000000 RCX: ffffffff818ba030 RDX: 0000000000000000 RSI: ffffffff818ba03b RDI: ffff88801ba0f870 RBP: ffffea0002777b88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dead000000000100 R13: ffffea0002777b80 R14: dffffc0000000000 R15: 00007f9d10d3f000 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1016 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1037 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9d127c7a39 Code: Bad RIP value. RSP: 002b:00007f9d0fcda188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: 0000000000010000 RBX: 00007f9d128cb1a0 RCX: 00007f9d127c7a39 RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f9d12821e8f R08: 000000000002ffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffda960492f R14: 00007f9d0fcda300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 ---------------- Code disassembly (best guess), 6 bytes skipped: 0: df c7 ffreep %st(7) 2: 85 84 08 00 00 00 00 test %eax,0x0(%rax,%rcx,1) 9: 00 00 add %al,(%rax) b: 48 c1 e8 03 shr $0x3,%rax f: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 13: 75 63 jne 0x78 15: 48 83 3d 45 cc a6 08 cmpq $0x0,0x8a6cc45(%rip) # 0x8a6cc62 1c: 00 1d: 74 2c je 0x4b 1f: 48 89 df mov %rbx,%rdi 22: 57 push %rdi 23: 9d popfq * 24: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 29: 48 83 c4 08 add $0x8,%rsp 2d: 44 89 e0 mov %r12d,%eax 30: 5b pop %rbx 31: 5d pop %rbp 32: 41 5c pop %r12 34: c3 retq 35: 48 83 c4 08 add $0x8,%rsp 39: 41 rex.B