ext4: missing !bh check in ext4_xattr_inode_write()

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commit eb6984fa4c upstream.

According to Ted Ts'o ext4_getblk() called in ext4_xattr_inode_write()
should not return bh = NULL

The only time that bh could be NULL, then, would be in the case of
something really going wrong; a programming error elsewhere (perhaps a
wild pointer dereference) or I/O error causing on-disk file system
corruption (although that would be highly unlikely given that we had
*just* allocated the blocks and so the metadata blocks in question
probably would still be in the cache).

Fixes: e50e5129f3 ("ext4: xattr-in-inode support")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 4.13
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Vasily Averin 2018-11-09 11:34:40 -05:00 • committed by Greg Kroah-Hartman

parent 20dd2c4e7f

commit 4903c091ce

1 changed files with 6 additions and 0 deletions

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fs/ext4/xattr.c

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