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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-10-12 22:49:23 +0300 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-10-14 00:55:33 +0300 |
| commit | a319aeaebb6c7d8e68125943d454031b27d6b3ef (patch) | |
| tree | cb472de5b7f3e29f2ed06ef4a5ddc38d8487c878 /fs/bcachefs/alloc_background.c | |
| parent | 573ddcdc56077615f8db045cd06b44dd8fc01f4b (diff) | |
| download | linux-a319aeaebb6c7d8e68125943d454031b27d6b3ef.tar.xz | |
bcachefs: Fix missing bounds checks in bch2_alloc_read()
We were checking that the alloc key was for a valid device, but not a
valid bucket.
This is the upgrade path from versions prior to bcachefs being mainlined.
Reported-by: syzbot+a1b59c8e1a3f022fd301@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/alloc_background.c')
| -rw-r--r-- | fs/bcachefs/alloc_background.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/bcachefs/alloc_background.c b/fs/bcachefs/alloc_background.c index 4e4a448f6931..6e161f8ffe8d 100644 --- a/fs/bcachefs/alloc_background.c +++ b/fs/bcachefs/alloc_background.c @@ -639,6 +639,16 @@ int bch2_alloc_read(struct bch_fs *c) continue; } + if (k.k->p.offset < ca->mi.first_bucket) { + bch2_btree_iter_set_pos(&iter, POS(k.k->p.inode, ca->mi.first_bucket)); + continue; + } + + if (k.k->p.offset >= ca->mi.nbuckets) { + bch2_btree_iter_set_pos(&iter, POS(k.k->p.inode + 1, 0)); + continue; + } + struct bch_alloc_v4 a; *bucket_gen(ca, k.k->p.offset) = bch2_alloc_to_v4(k, &a)->gen; 0; |