| TITLE: BUG: soft lockup in mount |
| TYPE: HANG |
| |
| [ 848.443720] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz-executor694:3996] |
| [ 848.452125] Modules linked in: |
| [ 848.455412] irq event stamp: 933704 |
| [ 848.459142] hardirqs last enabled at (933703): [<ffffffff839f9669>] restore_regs_and_iret+0x0/0x1d |
| [ 848.468415] hardirqs last disabled at (933704): [<ffffffff839fa62b>] apic_timer_interrupt+0x9b/0xb0 |
| [ 848.477698] softirqs last enabled at (921172): [<ffffffff839ffb1c>] __do_softirq+0x46c/0x937 |
| [ 848.486386] softirqs last disabled at (921163): [<ffffffff8114b237>] irq_exit+0x147/0x190 |
| [ 848.496037] CPU: 1 PID: 3996 Comm: syz-executor694 Not tainted 4.9.111-g03c70fe #10 |
| [ 848.503812] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| [ 848.513416] task: ffff8801d8ac3000 task.stack: ffff8801b70a0000 |
| [ 848.519454] RIP: 0010:[<ffffffff8160fc09>] [<ffffffff8160fc09>] change_mnt_propagation+0xa9/0xbd0 |
| [ 848.528820] RSP: 0018:ffff8801b70a7af0 EFLAGS: 00000246 |
| [ 848.534258] RAX: ffff8801d8ac3000 RBX: ffff8801cda6e400 RCX: ffff8801cda6e468 |
| [ 848.541526] RDX: 1ffff1003723a2c4 RSI: ffffffff8160fbe8 RDI: ffff8801b91d1620 |
| [ 848.548806] RBP: ffff8801b70a7b50 R08: ffff8801cda6e468 R09: 0000000000000001 |
| [ 848.556086] R10: 0000000000000000 R11: 1ffff1003b15872c R12: dffffc0000000000 |
| [ 848.563348] R13: ffff8801b91d1600 R14: ffff8801d9c47340 R15: ffffed0039b4dc84 |
| [ 848.570605] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7667b40 |
| [ 848.578828] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 |
| [ 848.584692] CR2: 00000000f76cadb0 CR3: 00000001ca4fa000 CR4: 00000000001606f0 |
| [ 848.592068] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 |
| [ 848.599318] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 |
| [ 848.606567] Stack: |
| [ 848.608707] ffff8801b70a7b20 ffffffff815db8af 0000000000000000 ffff8801cda6e4f0 |
| [ 848.616764] ffff8801cda6e420 ffff8801cda6e4e0 00040000b70a7b50 ffff8801cda6e490 |
| [ 848.624800] dffffc0000000000 ffff8801cda6e400 ffff8801d9c469a0 ffff8801b70a7bf0 |
| [ 848.632818] Call Trace: |
| [ 848.641493] [<ffffffff815dbfd6>] umount_tree+0x326/0x820 |
| [ 848.652638] [<ffffffff815e41e0>] attach_recursive_mnt+0x750/0x8f0 |
| [ 848.675872] [<ffffffff815e44ef>] graft_tree+0x16f/0x1f0 |
| [ 848.681308] [<ffffffff815e6eaf>] do_mount+0x1f5f/0x2740 |
| [ 848.724324] [<ffffffff8168c3ec>] compat_SyS_mount+0x4fc/0xff0 |
| [ 848.743149] [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 |
| [ 848.755940] [<ffffffff839fa3d0>] entry_SYSENTER_compat+0x90/0xa2 |
