[PATCH -next v3 0/2] jffs2: fix two memory leak when mount jffs2

From: Baokun Li
Date: Fri Jan 14 2022 - 05:17:54 EST


V1->V2:
In jffs2_scan_medium,
if s = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL);
returns error, go to "out" to do clear. Null pointer dereference
occurs when if (s->sum_list_head) is executed in "out".

V2->V3:
Sorry for the noise, but there seems to be a more elegant way to
fix the memory leak in jffs2_scan_medium. When memory allocation
fails or CONFIG_JFFS2_SUMMARY is N, s is NULL.For the former case,
add the new tag "out_buf" to avoid it.In the latter case,
jffs2_sum_reset_collected is also an empty function and does nothing.

Baokun Li (2):
jffs2: fix memory leak in jffs2_do_mount_fs
jffs2: fix memory leak in jffs2_scan_medium

fs/jffs2/build.c | 4 +++-
fs/jffs2/scan.c | 6 ++++--
2 files changed, 7 insertions(+), 3 deletions(-)

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2.31.1