* [f2fs-dev] [PATCH] f2fs: fix to invalidate dcc->f2fs_issue_discard in error path
@ 2022-10-13 15:56 Chao Yu
0 siblings, 0 replies; only message in thread
From: Chao Yu @ 2022-10-13 15:56 UTC (permalink / raw)
To: jaegeuk; +Cc: linux-kernel, linux-f2fs-devel
Otherwise, latter f2fs_stop_discard_thread() may access invalid
dcc->f2fs_issue_discard.
Signed-off-by: Chao Yu <chao@kernel.org>
---
fs/f2fs/segment.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 460048f3c850..cf5f534aa887 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2026,8 +2026,10 @@ int f2fs_start_discard_thread(struct f2fs_sb_info *sbi)
dcc->f2fs_issue_discard = kthread_run(issue_discard_thread, sbi,
"f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev));
- if (IS_ERR(dcc->f2fs_issue_discard))
+ if (IS_ERR(dcc->f2fs_issue_discard)) {
err = PTR_ERR(dcc->f2fs_issue_discard);
+ dcc->f2fs_issue_discard = NULL;
+ }
return err;
}
--
2.25.1
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