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| author | Al Viro <viro@zeniv.linux.org.uk> | 2022-07-30 00:29:05 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2022-07-30 00:29:05 -0400 |
| commit | 40a3cb0d2314a41975aa385a74643878454f6eac (patch) | |
| tree | 49681082737b854a1fc52ce8147863396045a94f /fs/dcache.c | |
| parent | b13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3 (diff) | |
| download | linux-stable-40a3cb0d2314a41975aa385a74643878454f6eac.tar.gz linux-stable-40a3cb0d2314a41975aa385a74643878454f6eac.tar.bz2 linux-stable-40a3cb0d2314a41975aa385a74643878454f6eac.zip | |
d_add_ci(): make sure we don't miss d_lookup_done()
All callers of d_alloc_parallel() must make sure that resulting
in-lookup dentry (if any) will encounter __d_lookup_done() before
the final dput(). d_add_ci() might end up creating in-lookup
dentries; they are fed to d_splice_alias(), which will normally
make sure they meet __d_lookup_done(). However, it is possible
to end up with d_splice_alias() failing with ERR_PTR(-ELOOP)
without having done so. It takes a corrupted ntfs or case-insensitive
xfs image, but neither should end up with memory corruption...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/dcache.c')
| -rw-r--r-- | fs/dcache.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index 93f4f5ee07bf..94b737311b61 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -2240,6 +2240,7 @@ struct dentry *d_add_ci(struct dentry *dentry, struct inode *inode, } res = d_splice_alias(inode, found); if (res) { + d_lookup_done(found); dput(found); return res; } |