diff options
| author | Kent Overstreet <kent.overstreet@gmail.com> | 2021-10-13 13:45:46 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:09:13 -0400 |
| commit | edeb986b017e9489add4daa7e61bc79cdbfb913c (patch) | |
| tree | e83472df96bab8579fda0f75e3b0eade5e234eb0 /fs/bcachefs/io.c | |
| parent | b9a7d8ac5f6d66619de8a4e37b23574d1ca107cf (diff) | |
| download | lwn-edeb986b017e9489add4daa7e61bc79cdbfb913c.tar.gz lwn-edeb986b017e9489add4daa7e61bc79cdbfb913c.zip | |
bcachefs: Don't allocate too-big bios
This fixes a null ptr deref in bio_alloc_bioset() -> biovec_slab()
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Diffstat (limited to 'fs/bcachefs/io.c')
| -rw-r--r-- | fs/bcachefs/io.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/bcachefs/io.c b/fs/bcachefs/io.c index 002fd35e6bfe..ea2adcc213d0 100644 --- a/fs/bcachefs/io.c +++ b/fs/bcachefs/io.c @@ -782,6 +782,8 @@ static struct bio *bch2_write_bio_alloc(struct bch_fs *c, ? ((unsigned long) buf & (PAGE_SIZE - 1)) : 0), PAGE_SIZE); + pages = min(pages, BIO_MAX_VECS); + bio = bio_alloc_bioset(NULL, pages, 0, GFP_NOIO, &c->bio_write); wbio = wbio_init(bio); |