diff options
| author | Alexander Potapenko <glider@google.com> | 2022-11-21 12:21:30 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2022-12-08 21:49:25 -0500 |
| commit | 956510c0c7439e90b8103aaeaf4da92878c622f0 (patch) | |
| tree | 0001e71f9a6919cd5da3e0c2d73c2f4917c20e5f /fs | |
| parent | 131294c35ed6f777bd4e79d42af13b5c41bf2775 (diff) | |
| download | linux-956510c0c7439e90b8103aaeaf4da92878c622f0.tar.bz2 | |
fs: ext4: initialize fsdata in pagecache_write()
When aops->write_begin() does not initialize fsdata, KMSAN reports
an error passing the latter to aops->write_end().
Fix this by unconditionally initializing fsdata.
Cc: Eric Biggers <ebiggers@kernel.org>
Fixes: c93d8f885809 ("ext4: add basic fs-verity support")
Reported-by: syzbot+9767be679ef5016b6082@syzkaller.appspotmail.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20221121112134.407362-1-glider@google.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/verity.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/verity.c b/fs/ext4/verity.c index 3c640bd7ecae..30e3b65798b5 100644 --- a/fs/ext4/verity.c +++ b/fs/ext4/verity.c @@ -79,7 +79,7 @@ static int pagecache_write(struct inode *inode, const void *buf, size_t count, size_t n = min_t(size_t, count, PAGE_SIZE - offset_in_page(pos)); struct page *page; - void *fsdata; + void *fsdata = NULL; int res; res = aops->write_begin(NULL, mapping, pos, n, &page, &fsdata); |