[LU-12956] oops in target_handle_connect()

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0
• Affects Version/s: Upstream
• Severity: 3
• Assignee: Alexander Boyko
• Reporter: Alex Zhuravlev

Description

Lustre: DEBUG MARKER: == replay-single test 111b: DNE: unlink striped dir, fail MDT2 ======================================= 01:31:46 (1573417906)
...
LDISKFS-fs (dm-1): mounted filesystem with ordered data mode. Opts: user_xattr,errors=remount-ro,no_mbcache,nodelalloc
Lustre: DEBUG MARKER: tmp.kWfRXHK7nj: executing wait_import_state_mount (FULL|IDLE) mdc.lustre-MDT0000-mdc-*.mds_server_uuid,mdc.lustre-MDT0001-mdc-*.mds_server_uuid
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 0 P4D 0 
Oops: 0010 [#1] SMP DEBUG_PAGEALLOC
CPU: 0 PID: 11132 Comm: mdt00_000 Tainted: G        W  O     --------- ---  4.18.0 #31
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff88017a7dbcb8 EFLAGS: 00010202
RAX: ffffffff8216dd00 RBX: ffff880172b72a80 RCX: 0000000000000000
RDX: 0000000000000098 RSI: 0000000000000000 RDI: ffff88012e41cd48
RBP: ffff880172364208 R08: 0000000000000028 R09: ffff880172b72f30
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801723643a8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff880198e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000014e73c000 CR4: 00000000000006b0
Call Trace:
 ? target_handle_connect+0x1ca9/0x2eb0 [ptlrpc]
 ? tgt_request_handle+0x148/0x17b0 [ptlrpc]
 ? ptlrpc_main+0x1182/0x3180 [ptlrpc]
 ? __kthread_parkme+0x2a/0x80
 ? kthread+0x100/0x140
 ? ptlrpc_register_service+0x15a0/0x15a0 [ptlrpc]
 ? kthread_flush_work_fn+0x10/0x10
 ? ret_from_fork+0x24/0x30