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| author | Aleksa Sarai <cyphar@cyphar.com> | 2023-08-12 16:16:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-16 19:27:24 +0300 |
| commit | 5aac2726b6930f9d5dffb1090ebfc0cdfad6a30c (patch) | |
| tree | ad5825a66f080f8ee596731b4184b3298a435a8f /io_uring | |
| parent | b61a06eca15cc4fd6ff50540ba3bbdea76e52c6b (diff) | |
| download | linux-5aac2726b6930f9d5dffb1090ebfc0cdfad6a30c.tar.xz | |
io_uring: correct check for O_TMPFILE
Commit 72dbde0f2afbe4af8e8595a89c650ae6b9d9c36f upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/openclose.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/io_uring/openclose.c b/io_uring/openclose.c index 67178e4bb282..008990e58180 100644 --- a/io_uring/openclose.c +++ b/io_uring/openclose.c @@ -110,9 +110,11 @@ int io_openat2(struct io_kiocb *req, unsigned int issue_flags) if (issue_flags & IO_URING_F_NONBLOCK) { /* * 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. */ - if (open->how.flags & (O_TRUNC | O_CREAT | O_TMPFILE)) + if (open->how.flags & (O_TRUNC | O_CREAT | __O_TMPFILE)) return -EAGAIN; op.lookup_flags |= LOOKUP_CACHED; op.open_flag |= O_NONBLOCK; |