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| author | Al Viro <viro@zeniv.linux.org.uk> | 2010-01-24 00:04:07 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2010-01-26 22:22:24 -0500 |
| commit | 29333920a5a46edcc9b728e2cf0134d5a9b516ee (patch) | |
| tree | 2991b9f6d82d43c712278d6364da4faad4a0180d /fs/affs/namei.c | |
| parent | afc70ed05a07bfe171f7a5b8fdc80bdb073d314f (diff) | |
| download | talos-op-linux-29333920a5a46edcc9b728e2cf0134d5a9b516ee.tar.gz talos-op-linux-29333920a5a46edcc9b728e2cf0134d5a9b516ee.zip | |
Fix remount races with symlink handling in affs
A couple of fields in affs_sb_info is used in follow_link() and
symlink() for handling AFFS "absolute" symlinks. Need locking
against affs_remount() updates.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/affs/namei.c')
| -rw-r--r-- | fs/affs/namei.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/affs/namei.c b/fs/affs/namei.c index 960d336ec694..d70bbbac6b7b 100644 --- a/fs/affs/namei.c +++ b/fs/affs/namei.c @@ -341,10 +341,13 @@ affs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) p = (char *)AFFS_HEAD(bh)->table; lc = '/'; if (*symname == '/') { + struct affs_sb_info *sbi = AFFS_SB(sb); while (*symname == '/') symname++; - while (AFFS_SB(sb)->s_volume[i]) /* Cannot overflow */ - *p++ = AFFS_SB(sb)->s_volume[i++]; + spin_lock(&sbi->symlink_lock); + while (sbi->s_volume[i]) /* Cannot overflow */ + *p++ = sbi->s_volume[i++]; + spin_unlock(&sbi->symlink_lock); } while (i < maxlen && (c = *symname++)) { if (c == '.' && lc == '/' && *symname == '.' && symname[1] == '/') { |
