6.6-stable review patch. If anyone has any objections, please let me know.
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From: Ryusuke Konishi konishi.ryusuke@gmail.com
[ Upstream commit 8e39fbb1edbb4ec9d7c1124f403877fc167fcecd ]
In preparation for writing logs, in nilfs_btree_propagate(), which makes parent and ancestor node blocks dirty starting from a modified data block or b-tree node block, if the starting block does not belong to the b-tree, i.e. is isolated, nilfs_btree_do_lookup() called within the function fails with -ENOENT.
In this case, even though -ENOENT is an internal code, it is propagated to the log writer via nilfs_bmap_propagate() and may be erroneously returned to system calls such as fsync().
Fix this issue by changing the error code to -EINVAL in this case, and having the bmap layer detect metadata corruption and convert the error code appropriately.
Link: https://lkml.kernel.org/r/20250428173808.6452-3-konishi.ryusuke@gmail.com Fixes: 1f5abe7e7dbc ("nilfs2: replace BUG_ON and BUG calls triggerable from ioctl") Signed-off-by: Ryusuke Konishi konishi.ryusuke@gmail.com Cc: Wentao Liang vulab@iscas.ac.cn Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/nilfs2/btree.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c index dbd27a44632fa..5e70a3478afe0 100644 --- a/fs/nilfs2/btree.c +++ b/fs/nilfs2/btree.c @@ -2094,11 +2094,13 @@ static int nilfs_btree_propagate(struct nilfs_bmap *btree,
ret = nilfs_btree_do_lookup(btree, path, key, NULL, level + 1, 0); if (ret < 0) { - if (unlikely(ret == -ENOENT)) + if (unlikely(ret == -ENOENT)) { nilfs_crit(btree->b_inode->i_sb, "writing node/leaf block does not appear in b-tree (ino=%lu) at key=%llu, level=%d", btree->b_inode->i_ino, (unsigned long long)key, level); + ret = -EINVAL; + } goto out; }