diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2025-03-16 16:08:41 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2025-03-17 14:23:49 -0400 |
| commit | c0836924b19ae84ad95d7ec97455c96f61b81201 (patch) | |
| tree | e48afe4496a7e6ef8c7ec6a1d5d14064f69747ba /libbcachefs/util.c | |
| parent | f42ee45c6e6409ad7c971aa37aef69b97d761006 (diff) | |
Update bcachefs sources to 4d28432bcc5f bcachefs: Validate bch_sb.offset field
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'libbcachefs/util.c')
| -rw-r--r-- | libbcachefs/util.c | 36 |
1 files changed, 21 insertions, 15 deletions
diff --git a/libbcachefs/util.c b/libbcachefs/util.c index 50a90e48..bf555ae7 100644 --- a/libbcachefs/util.c +++ b/libbcachefs/util.c @@ -653,21 +653,6 @@ int bch2_bio_alloc_pages(struct bio *bio, size_t size, gfp_t gfp_mask) return 0; } -size_t bch2_rand_range(size_t max) -{ - size_t rand; - - if (!max) - return 0; - - do { - rand = get_random_long(); - rand &= roundup_pow_of_two(max) - 1; - } while (rand >= max); - - return rand; -} - void memcpy_to_bio(struct bio *dst, struct bvec_iter dst_iter, const void *src) { struct bio_vec bv; @@ -698,6 +683,27 @@ void memcpy_from_bio(void *dst, struct bio *src, struct bvec_iter src_iter) } } +#ifdef CONFIG_BCACHEFS_DEBUG +void bch2_corrupt_bio(struct bio *bio) +{ + struct bvec_iter iter; + struct bio_vec bv; + unsigned offset = get_random_u32_below(bio->bi_iter.bi_size / sizeof(u64)); + + bio_for_each_segment(bv, bio, iter) { + unsigned u64s = bv.bv_len / sizeof(u64); + + if (offset < u64s) { + u64 *segment = bvec_kmap_local(&bv); + segment[offset] = get_random_u64(); + kunmap_local(segment); + return; + } + offset -= u64s; + } +} +#endif + #if 0 void eytzinger1_test(void) { |