Qiujun Huang 23ac2a31c5 pstore/zone: Use GFP_ATOMIC to allocate zone buffer ...

commit 99b3b837855b987563bcfb397cf9ddd88262814b upstream.

There is a case found when triggering a panic_on_oom, pstore fails to dump
kmsg. Because psz_kmsg_write_record can't get the new buffer.

Handle this by using GFP_ATOMIC to allocate a buffer at lower watermark.

Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Fixes: 335426c6dcdd ("pstore/zone: Provide way to skip "broken" zone for MTD devices")
Cc: WeiXiong Liao <gmpy.liaowx@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/CAJRQjofRCF7wjrYmw3D7zd5QZnwHQq+F8U-mJDJ6NZ4bddYdLA@mail.gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2023-01-04 11:28:59 +01:00

..

blk.c

pstore/blk: Use "%lu" to format unsigned long

2021-11-21 09:44:19 -08:00

ftrace.c

pstore/ftrace: Allow immediate recording

2021-11-18 10:29:52 -08:00

inode.c

pstore: Add priv field to pstore_record for backend specific use

2022-06-24 20:40:04 +02:00

internal.h

pstore: Move kmsg_bytes default into Kconfig

2020-12-01 12:09:17 -08:00

Kconfig

pstore: Make sure CONFIG_PSTORE_PMSG selects CONFIG_RT_MUTEXES

2022-12-31 13:33:08 +01:00

Makefile

pstore/blk: Introduce backend for block devices

2020-05-30 10:34:03 -07:00

platform.c

Revert "pstore: migrate to crypto acomp interface"

2022-09-30 08:16:06 -07:00

pmsg.c

pstore: Switch pmsg_lock to an rt_mutex to avoid priority inversion

2022-12-31 13:33:07 +01:00

ram_core.c

pstore: Avoid kcore oops by vmap()ing with VM_IOREMAP

2022-12-31 13:31:54 +01:00

ram.c

pstore: Properly assign mem_type property

2023-01-04 11:28:59 +01:00

zone.c

pstore/zone: Use GFP_ATOMIC to allocate zone buffer

2023-01-04 11:28:59 +01:00