Patch "f2fs: fix to check return value of f2fs_reserve_new_block()" has been added to the 5.4-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    f2fs: fix to check return value of f2fs_reserve_new_block()

to the 5.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     f2fs-fix-to-check-return-value-of-f2fs_reserve_new_b.patch
and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 58a8d0c4744ad46cd5997fbd7ebe2618b45776af
Author: Chao Yu <chao@xxxxxxxxxx>
Date:   Thu Nov 16 14:25:56 2023 +0800

    f2fs: fix to check return value of f2fs_reserve_new_block()
    
    [ Upstream commit 956fa1ddc132e028f3b7d4cf17e6bfc8cb36c7fd ]
    
    Let's check return value of f2fs_reserve_new_block() in do_recover_data()
    rather than letting it fails silently.
    
    Also refactoring check condition on return value of f2fs_reserve_new_block()
    as below:
    - trigger f2fs_bug_on() only for ENOSPC case;
    - use do-while statement to avoid redundant codes;
    
    Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
    Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index da123c6d3ce0..7e30326b296c 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -611,7 +611,16 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
 		 */
 		if (dest == NEW_ADDR) {
 			f2fs_truncate_data_blocks_range(&dn, 1);
-			f2fs_reserve_new_block(&dn);
+			do {
+				err = f2fs_reserve_new_block(&dn);
+				if (err == -ENOSPC) {
+					f2fs_bug_on(sbi, 1);
+					break;
+				}
+			} while (err &&
+				IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION));
+			if (err)
+				goto err;
 			continue;
 		}
 
@@ -619,12 +628,14 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
 		if (f2fs_is_valid_blkaddr(sbi, dest, META_POR)) {
 
 			if (src == NULL_ADDR) {
-				err = f2fs_reserve_new_block(&dn);
-				while (err &&
-				       IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION))
+				do {
 					err = f2fs_reserve_new_block(&dn);
-				/* We should not get -ENOSPC */
-				f2fs_bug_on(sbi, err);
+					if (err == -ENOSPC) {
+						f2fs_bug_on(sbi, 1);
+						break;
+					}
+				} while (err &&
+					IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION));
 				if (err)
 					goto err;
 			}