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erofs: fix possible memory leak in z_erofs_gbuf_exit()

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Because we incorrectly reused of variable `i` in `z_erofs_gbuf_exit()`
for inner loop, we may exit early from outer loop resulting in memory
leak. Fix this by using separate variable for iterating through inner loop.

Fixes: f36f3010f6 ("erofs: rename per-CPU buffers to global buffer pool and make it configurable")
Signed-off-by: Sandeep Dhavale <dhavale@google.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20240624220206.3373197-1-dhavale@google.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
This commit is contained in:
Sandeep Dhavale 2024-06-24 15:02:05 -07:00 committed by Gao Xiang
parent f2661062f1
commit 9d01f6f6d8
1 changed files with 4 additions and 4 deletions
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8
fs/erofs/zutil.c
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@ -148,7 +148,7 @@ int __init z_erofs_gbuf_init(void)
void z_erofs_gbuf_exit(void)
{
int i;
int i, j;
for (i = 0; i < z_erofs_gbuf_count + (!!z_erofs_rsvbuf); ++i) {
struct z_erofs_gbuf *gbuf = &z_erofs_gbufpool[i];
@ -161,9 +161,9 @@ void z_erofs_gbuf_exit(void)
if (!gbuf->pages)
continue;
for (i = 0; i < gbuf->nrpages; ++i)
if (gbuf->pages[i])
put_page(gbuf->pages[i]);
for (j = 0; j < gbuf->nrpages; ++j)
if (gbuf->pages[j])
put_page(gbuf->pages[j]);
kfree(gbuf->pages);
gbuf->pages = NULL;
}