[LU-16734] kernel warning in key_task_permission() leading to stuck resources

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Aurelien Degremont
• Reporter: Aurelien Degremont

Description

On Ubuntu 22.04, when some keyring resources are getting cleared, a warning message is displayed instead, and the clearing is not successful, leading into a misbehaving filesystem and regular stack traces being printed in logs.

WARNING: CPU: 44 PID: 305468 at security/keys/permission.c:35 key_task_permission+0xa5/0x150
CPU: 44 PID: 305468 Comm: kworker/u448:1 Tainted: P        W  OE     5.15.0-69-generic #76-Ubuntu
Workqueue: ptlrpc_pinger ptlrpc_pinger_main [ptlrpc]
RIP: 0010:key_task_permission+0xa5/0x150
Call Trace:
 <TASK>
 lookup_user_key+0xf4/0x700
 ? key_validate+0x50/0x50
 request_key_unlink+0x230/0x330 [ptlrpc_gss]
 gss_sec_lookup_ctx_kr+0xa0c/0xd0c [ptlrpc_gss]
 get_my_ctx+0x5f/0x140 [ptlrpc]
 sptlrpc_req_get_ctx+0x15a/0x280 [ptlrpc]
 ptlrpc_request_bufs_pack+0x283/0x6a0 [ptlrpc]
 ptlrpc_request_alloc_pack+0x3a/0x70 [ptlrpc]
 ptlrpc_pinger_main+0x893/0xab0 [ptlrpc]
 process_one_work+0x228/0x3d0
 worker_thread+0x53/0x420
 ? process_one_work+0x3d0/0x3d0
 kthread+0x127/0x150
 ? set_kthread_struct+0x50/0x50
 ret_from_fork+0x1f/0x30
 </TASK>

This is because in Linux 5.8, in commit 8c0637e950d68933a67f7438f779d79b049b5e5c, lookup_user_key() API was changed and requires different parameters.