netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. IPv6: ADDRCONF(NETDEV_UP): vlan387: link is not ready watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.5:16178] Modules linked in: irq event stamp: 7176281 hardirqs last enabled at (7176280): [] kfree+0x110/0x210 mm/slab.c:3823 hardirqs last disabled at (7176281): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (7172292): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (7172295): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (7172295): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 16178 Comm: syz-executor.5 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:kfree+0x123/0x210 mm/slab.c:3823 Code: 89 ea 48 89 ee 4c 89 e7 e8 da ee ff ff f6 c7 02 74 ca e8 20 74 cf ff 48 83 3d 60 4d 59 08 00 0f 84 eb 00 00 00 48 89 df 57 9d <0f> 1f 44 00 00 5b 5d 41 5c 41 5d c3 65 8b 05 ea 4b 69 7e 83 f8 07 RSP: 0018:ffff8880ba107a70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000286 RCX: 1ffff11005d35dda RDX: 0000000000000000 RSI: ffff88802e9aeed8 RDI: 0000000000000286 RBP: ffff88802553e500 R08: 0000000000400000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88813bff0c40 R13: ffffffff8670bf6e R14: 0000000000000000 R15: ffff88802553ebf0 FS: 00007f8a81c98700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5736eb71b8 CR3: 000000008f64f000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_free_head net/core/skbuff.c:563 [inline] skb_release_data+0x6de/0x920 net/core/skbuff.c:583 skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb net/core/skbuff.c:654 [inline] kfree_skb+0x11a/0x3d0 net/core/skbuff.c:672 kfree_skb_list+0x3f/0x60 net/core/skbuff.c:681 __dev_xmit_skb net/core/dev.c:3506 [inline] __dev_queue_xmit+0x2973/0x2e00 net/core/dev.c:3807 mrp_queue_xmit net/802/mrp.c:367 [inline] mrp_join_timer+0x8a/0xc0 net/802/mrp.c:611 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __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:_vm_normal_page+0x4/0x510 mm/memory.c:833 Code: ff 48 c7 c7 50 b4 cf 89 e8 49 e0 0c 00 e9 98 fe ff ff 48 c7 c7 e8 b4 cf 89 e8 38 e0 0c 00 e9 d9 fe ff ff 0f 1f 00 41 57 41 56 <49> 89 f6 41 55 49 89 fd 41 54 55 53 48 bb 00 00 00 00 00 fc ff df RSP: 0018:ffff8880287c7758 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88802e9ae600 RBX: 8000000000000007 RCX: 0000000000000001 RDX: 80000000aa26c007 RSI: 00007f8a830b0000 RDI: ffff888091d21568 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 80000000aa26c007 R13: ffffea00026381c0 R14: dffffc0000000000 R15: 00007f8a830b1000 zap_pte_range mm/memory.c:1323 [inline] zap_pmd_range mm/memory.c:1463 [inline] zap_pud_range mm/memory.c:1492 [inline] zap_p4d_range mm/memory.c:1513 [inline] unmap_page_range+0x1141/0x2c50 mm/memory.c:1534 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: 0033:0x7f8a83323059 Code: Bad RIP value. RSP: 002b:00007f8a81c98168 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: 0000000000000006 RBX: 00007f8a83435f60 RCX: 00007f8a83323059 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 000000000000000a RBP: 00007f8a8337d08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcf99aacff R14: 00007f8a81c98300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1ae/0x3c0 kernel/locking/lockdep.c:3911 Code: 8d bb 84 08 00 00 48 83 c4 20 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 d6 01 00 00 <48> c7 c0 88 82 f1 89 48 ba 00 00 00 00 00 fc ff df c7 83 84 08 00 RSP: 0018:ffff8880b5a47c58 EFLAGS: 00000046 RAX: 0000000000000007 RBX: ffff8880b5a361c0 RCX: 9c1f49bc7908dbe0 RDX: 0000000000000000 RSI: 0000000005498b2d RDI: ffff8880b5a36a44 RBP: ffffffff89f85fa0 R08: 000000005f736fb7 R09: 0000000000000002 R10: ffff8880b5a36a98 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00c307d00 CR3: 00000000b41d7000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:419 [inline] batadv_nc_worker+0x12d/0xd50 net/batman-adv/network-coding.c:730 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ---------------- Code disassembly (best guess): 0: 89 ea mov %ebp,%edx 2: 48 89 ee mov %rbp,%rsi 5: 4c 89 e7 mov %r12,%rdi 8: e8 da ee ff ff callq 0xffffeee7 d: f6 c7 02 test $0x2,%bh 10: 74 ca je 0xffffffdc 12: e8 20 74 cf ff callq 0xffcf7437 17: 48 83 3d 60 4d 59 08 cmpq $0x0,0x8594d60(%rip) # 0x8594d7f 1e: 00 1f: 0f 84 eb 00 00 00 je 0x110 25: 48 89 df mov %rbx,%rdi 28: 57 push %rdi 29: 9d popfq * 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: 41 5c pop %r12 33: 41 5d pop %r13 35: c3 retq 36: 65 8b 05 ea 4b 69 7e mov %gs:0x7e694bea(%rip),%eax # 0x7e694c27 3d: 83 f8 07 cmp $0x7,%eax