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authorRitesh Harjani <riteshh@linux.ibm.com>2022-01-17 17:41:47 +0530
committerTheodore Ts'o <tytso@mit.edu>2022-02-03 10:57:20 -0500
commit897026aaa73eb2517dfea8d147f20ddb0b813044 (patch)
tree9d3ae7cb45cdf42cb557c6a1776271f7b1415157 /fs/ext4/inline.c
parentbdc8a53a6f2f0b1cb5f991440f2100732299eb93 (diff)
ext4: fix error handling in ext4_restore_inline_data()
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
Diffstat (limited to 'fs/ext4/inline.c')
-rw-r--r--fs/ext4/inline.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 39a1ab129fdc..d091133a4b46 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1133,7 +1133,15 @@ 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);
}