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authorAleksa Sarai <cyphar@cyphar.com>2023-08-07 05:24:15 +0300
committerJens Axboe <axboe@kernel.dk>2023-08-07 21:34:23 +0300
commit72dbde0f2afbe4af8e8595a89c650ae6b9d9c36f (patch)
treebb73d8927d64bc4e7a0d615c47898dfc16e2a31a /io_uring/openclose.c
parent52a93d39b17dc7eb98b6aa3edb93943248e03b2f (diff)
downloadlinux-72dbde0f2afbe4af8e8595a89c650ae6b9d9c36f.tar.xz
io_uring: correct check for O_TMPFILE
O_TMPFILE is actually __O_TMPFILE|O_DIRECTORY. This means that the old check for whether RESOLVE_CACHED can be used would incorrectly think that O_DIRECTORY could not be used with RESOLVE_CACHED. Cc: stable@vger.kernel.org # v5.12+ Fixes: 3a81fd02045c ("io_uring: enable LOOKUP_CACHED path resolution for filename lookups") Signed-off-by: Aleksa Sarai <cyphar@cyphar.com> Link: https://lore.kernel.org/r/20230807-resolve_cached-o_tmpfile-v3-1-e49323e1ef6f@cyphar.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/openclose.c')
-rw-r--r--io_uring/openclose.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/io_uring/openclose.c b/io_uring/openclose.c
index 10ca57f5bd24..e3fae26e025d 100644
--- a/io_uring/openclose.c
+++ b/io_uring/openclose.c
@@ -35,9 +35,11 @@ static bool io_openat_force_async(struct io_open *open)
{
/*
* Don't bother trying for O_TRUNC, O_CREAT, or O_TMPFILE open,
- * it'll always -EAGAIN
+ * it'll always -EAGAIN. Note that we test for __O_TMPFILE because
+ * O_TMPFILE includes O_DIRECTORY, which isn't a flag we need to force
+ * async for.
*/
- return open->how.flags & (O_TRUNC | O_CREAT | O_TMPFILE);
+ return open->how.flags & (O_TRUNC | O_CREAT | __O_TMPFILE);
}
static int __io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)