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Execution then continues with the invalid fragment and count values. The sibling function ufs_free_blocks() performs an equivalent check and bails out via goto failed. Mirror that behaviour here so that a corrupt image cannot push the code past the check into paths that assume the invariant holds. No functional change for valid inputs. Signed-off-by: Muhammad Mahdi Amirpour --- fs/ufs/balloc.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c index 628edfde3..377ba77fb 100644 --- a/fs/ufs/balloc.c +++ b/fs/ufs/balloc.c @@ -73,8 +73,12 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count) UFSD("ENTER, fragment %llu, count %u\n", (unsigned long long)fragment, count); - if (ufs_fragnum(fragment) + count > uspi->s_fpb) - ufs_error (sb, "ufs_free_fragments", "internal error"); + if (ufs_fragnum(fragment) + count > uspi->s_fpb) { + ufs_error(sb, "ufs_free_fragments", + "invalid fragment %llu, count %u", + (unsigned long long)fragment, count); + return; + } mutex_lock(&UFS_SB(sb)->s_lock); -- 2.55.0