[LU-12436] Memory allocation failure error dropped

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0, Lustre 2.12.5
• Labels: LTS12
• Severity: 3
• Assignee: Shaun Tancheff
• Reporter: Shaun Tancheff

Description

In low memory conditions a page allocation failure leading to a leaked ERR_PTR(-ENOMEM) being later used as a valid pointer causing a NULL pointer deference.

IP: osc_io_init+0x16/0x80 [osc]
PGD 0 P4D 0
Oops: 0000 1 SMP PTI
...
Call Trace:
cl_io_init0.isra.21+0xa1/0x150 [obdclass]
cl_io_sub_init+0x3a/0x80 [obdclass]
lov_sub_get+0x29d/0x770 [lov]
lov_io_iter_init+0x26c/0xa80 [lov]

 

Issue Links

• duplicates: LU-12011 NULL pointer dereference in osc_io_init in sanity test 411
• is related to: LU-10467 use standard linux wait_event macros