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| author | Ritesh Harjani <riteshh@linux.ibm.com> | 2022-01-17 17:41:47 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-08 18:15:30 +0100 |
| commit | 48d64974be2fedf2b7beae0a39a05ca654af04a7 (patch) | |
| tree | c534cd161475a27cf9ce850edce60fa50bbda8a1 | |
| parent | 4b5fc3acd85278f8ba8329299b7cf437c3c9b296 (diff) | |
| download | linux-stable-48d64974be2fedf2b7beae0a39a05ca654af04a7.tar.gz linux-stable-48d64974be2fedf2b7beae0a39a05ca654af04a7.tar.bz2 linux-stable-48d64974be2fedf2b7beae0a39a05ca654af04a7.zip | |
ext4: fix error handling in ext4_restore_inline_data()
commit 897026aaa73eb2517dfea8d147f20ddb0b813044 upstream.
While running "./check -I 200 generic/475" it sometimes gives below
kernel BUG(). Ideally we should not call ext4_write_inline_data() if
ext4_create_inline_data() has failed.
<log snip>
[73131.453234] kernel BUG at fs/ext4/inline.c:223!
<code snip>
212 static void ext4_write_inline_data(struct inode *inode, struct ext4_iloc *iloc,
213 void *buffer, loff_t pos, unsigned int len)
214 {
<...>
223 BUG_ON(!EXT4_I(inode)->i_inline_off);
224 BUG_ON(pos + len > EXT4_I(inode)->i_inline_size);
This patch handles the error and prints out a emergency msg saying potential
data loss for the given inode (since we couldn't restore the original
inline_data due to some previous error).
[ 9571.070313] EXT4-fs (dm-0): error restoring inline_data for inode -- potential data loss! (inode 1703982, error -30)
Reported-by: Eric Whitney <enwlinux@gmail.com>
Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/9f4cd7dfd54fa58ff27270881823d94ddf78dd07.1642416995.git.riteshh@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/ext4/inline.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index a0f20a048347..c87558f120fb 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -1123,7 +1123,15 @@ static void ext4_restore_inline_data(handle_t *handle, struct inode *inode, struct ext4_iloc *iloc, void *buf, int inline_size) { - ext4_create_inline_data(handle, inode, inline_size); + int ret; + + ret = ext4_create_inline_data(handle, inode, inline_size); + if (ret) { + ext4_msg(inode->i_sb, KERN_EMERG, + "error restoring inline_data for inode -- potential data loss! (inode %lu, error %d)", + inode->i_ino, ret); + return; + } ext4_write_inline_data(inode, iloc, buf, 0, inline_size); ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); } |