diff options
| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2009-04-06 19:01:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-07 08:31:19 -0700 |
| commit | 1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b (patch) | |
| tree | f80e97297d5badebd31bbb17003d76a4ea30453a /fs/nilfs2/direct.c | |
| parent | 2c2e52fc4fca251e68f90821c9ff5cb18be4df58 (diff) | |
| download | lwn-1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b.tar.gz lwn-1f5abe7e7dbcd83e73212c6cb135a6106cea6a0b.zip | |
nilfs2: replace BUG_ON and BUG calls triggerable from ioctl
Pekka Enberg advised me:
> It would be nice if BUG(), BUG_ON(), and panic() calls would be
> converted to proper error handling using WARN_ON() calls. The BUG()
> call in nilfs_cpfile_delete_checkpoints(), for example, looks to be
> triggerable from user-space via the ioctl() system call.
This will follow the comment and keep them to a minimum.
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/direct.c')
| -rw-r--r-- | fs/nilfs2/direct.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/fs/nilfs2/direct.c b/fs/nilfs2/direct.c index e3ec24850089..c6379e482781 100644 --- a/fs/nilfs2/direct.c +++ b/fs/nilfs2/direct.c @@ -210,7 +210,6 @@ static int nilfs_direct_last_key(const struct nilfs_bmap *bmap, __u64 *keyp) if (lastkey == NILFS_DIRECT_KEY_MAX + 1) return -ENOENT; - BUG_ON(keyp == NULL); *keyp = lastkey; return 0; @@ -366,9 +365,17 @@ static int nilfs_direct_assign(struct nilfs_bmap *bmap, direct = (struct nilfs_direct *)bmap; key = nilfs_bmap_data_get_key(bmap, *bh); - BUG_ON(key > NILFS_DIRECT_KEY_MAX); + if (unlikely(key > NILFS_DIRECT_KEY_MAX)) { + printk(KERN_CRIT "%s: invalid key: %llu\n", __func__, + (unsigned long long)key); + return -EINVAL; + } ptr = nilfs_direct_get_ptr(direct, key); - BUG_ON(ptr == NILFS_BMAP_INVALID_PTR); + if (unlikely(ptr == NILFS_BMAP_INVALID_PTR)) { + printk(KERN_CRIT "%s: invalid pointer: %llu\n", __func__, + (unsigned long long)ptr); + return -EINVAL; + } return direct->d_ops->dop_assign(direct, key, ptr, bh, blocknr, binfo); |