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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-06-06 22:06:22 +0300 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-06-10 20:17:16 +0300 |
| commit | 9432e90df1b8a544f220fd455b2fa39eed8a535d (patch) | |
| tree | b1360af4e6c3d4cd8d4a52e6b38311d405b939de /fs/bcachefs/io_write.c | |
| parent | 9c4acd19bbff5db4629c193366f82960e38d1c6f (diff) | |
| download | linux-9432e90df1b8a544f220fd455b2fa39eed8a535d.tar.xz | |
bcachefs: Check for invalid bucket from bucket_gen(), gc_bucket()
Turn more asserts into proper recoverable error paths.
Reported-by: syzbot+246b47da27f8e7e7d6fb@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/io_write.c')
| -rw-r--r-- | fs/bcachefs/io_write.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/fs/bcachefs/io_write.c b/fs/bcachefs/io_write.c index 9401d13e31bb..05e0cbef420b 100644 --- a/fs/bcachefs/io_write.c +++ b/fs/bcachefs/io_write.c @@ -1220,7 +1220,7 @@ static void bch2_nocow_write(struct bch_write_op *op) DARRAY_PREALLOCATED(struct bucket_to_lock, 3) buckets; u32 snapshot; struct bucket_to_lock *stale_at; - int ret; + int stale, ret; if (op->flags & BCH_WRITE_MOVE) return; @@ -1299,7 +1299,8 @@ retry: BUCKET_NOCOW_LOCK_UPDATE); rcu_read_lock(); - bool stale = gen_after(*bucket_gen(ca, i->b.offset), i->gen); + u8 *gen = bucket_gen(ca, i->b.offset); + stale = !gen ? -1 : gen_after(*gen, i->gen); rcu_read_unlock(); if (unlikely(stale)) { @@ -1380,8 +1381,18 @@ err_bucket_stale: break; } - /* We can retry this: */ - ret = -BCH_ERR_transaction_restart; + struct printbuf buf = PRINTBUF; + if (bch2_fs_inconsistent_on(stale < 0, c, + "pointer to invalid bucket in nocow path on device %llu\n %s", + stale_at->b.inode, + (bch2_bkey_val_to_text(&buf, c, k), buf.buf))) { + ret = -EIO; + } else { + /* We can retry this: */ + ret = -BCH_ERR_transaction_restart; + } + printbuf_exit(&buf); + goto err_get_ioref; } |