IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:6478] Modules linked in: irq event stamp: 12289400 hardirqs last enabled at (12289399): [] seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] hardirqs last enabled at (12289399): [] read_seqcount_begin include/linux/seqlock.h:164 [inline] hardirqs last enabled at (12289399): [] current_kernel_time64+0x137/0x1b0 kernel/time/timekeeping.c:2169 hardirqs last disabled at (12289400): [] apic_timer_interrupt+0x95/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (12284696): [] __do_softirq+0x644/0x9a2 kernel/softirq.c:314 softirqs last disabled at (12284689): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (12284689): [] irq_exit+0x15f/0x1a0 kernel/softirq.c:409 CPU: 0 PID: 6478 Comm: syz-executor.4 Not tainted 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881d7a90580 task.stack: ffff8881e2be8000 RIP: 0010:preempt_count_add+0x26/0x1a0 kernel/sched/core.c:3099 RSP: 0018:ffff8881e2bef380 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffffffff893846c0 RCX: 1ffffffff0edbbac RDX: 0000000000000004 RSI: ffffffff86bd0d80 RDI: 0000000000000001 RBP: ffff8881e2bef390 R08: 0000000000001000 R09: ffffea00071929c0 R10: ffff8881db335268 R11: ffff8881db3353c0 R12: 0000000000000001 R13: 000000000000001c R14: ffff8881e4c8e200 R15: ffffea00071929c0 FS: 00007f2320dae700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052c071 CR3: 00000001e23e0006 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1185 [inline] rcu_lockdep_current_cpu_online+0x37/0x140 kernel/rcu/tree.c:1177 rcu_read_lock_sched_held+0x96/0x120 kernel/rcu/update.c:113 trace_writeback_dirty_inode_start include/trace/events/writeback.h:120 [inline] __mark_inode_dirty+0x79f/0xe80 fs/fs-writeback.c:2145 mark_inode_dirty include/linux/fs.h:2024 [inline] generic_write_end+0x162/0x220 fs/buffer.c:2229 ext4_da_write_end+0x2d6/0xa30 fs/ext4/inode.c:3208 generic_perform_write+0x318/0x450 mm/filemap.c:3066 __generic_file_write_iter+0x205/0x590 mm/filemap.c:3180 ext4_file_write_iter+0x27a/0xe40 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1778 [inline] do_iter_readv_writev+0x460/0x900 fs/read_write.c:675 do_iter_write fs/read_write.c:954 [inline] do_iter_write+0x12b/0x520 fs/read_write.c:935 vfs_iter_write+0x5b/0xb0 fs/read_write.c:967 iter_file_splice_write+0x545/0xc20 fs/splice.c:749 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x104/0x1c0 fs/splice.c:1018 splice_direct_to_actor+0x27c/0x750 fs/splice.c:973 do_splice_direct+0x144/0x250 fs/splice.c:1061 do_sendfile+0x488/0xe60 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1496 [inline] SyS_sendfile64+0x97/0x110 fs/read_write.c:1488 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x460c99 RSP: 002b:00007f2320dae1a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 0000000000460c99 RDX: 0000000020000000 RSI: 0000000000000003 RDI: 0000000000000003 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 00008080fffffffe R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004f5328 R14: 00000000004b2ba5 R15: 00007f2320dae6bc Code: ff 0f 1f 40 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 54 41 89 fc 53 48 c7 c3 c0 46 38 89 48 89 da 48 c1 ea 03 0f b6 14 02 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 3d 01 00 00