kernel/linux.git/io_uring/openclose.c, branch v6.1.168

io_uring: fix filename leak in __io_openat_prep()

2026-01-11T14:18:56+00:00

Commit b14fad555302a2104948feaff70503b64c80ac01 upstream. __io_openat_prep() allocates a struct filename using getname(). However, for the condition of the file being installed in the fixed file table as well as having O_CLOEXEC flag set, the function returns early. At that point, the request doesn't have REQ_F_NEED_CLEANUP flag set. Due to this, the memory for the newly allocated struct filename is not cleaned up, causing a memory leak. Fix this by setting the REQ_F_NEED_CLEANUP for the request just after the successful getname() call, so that when the request is torn down, the filename will be cleaned up, along with other resources needing cleanup. Reported-by: syzbot+00e61c43eb5e4740438f@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=00e61c43eb5e4740438f Tested-by: syzbot+00e61c43eb5e4740438f@syzkaller.appspotmail.com Cc: stable@vger.kernel.org Signed-off-by: Prithvi Tambewagh Fixes: b9445598d8c6 ("io_uring: openat directly into fixed fd table") Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman

io_uring: correct check for O_TMPFILE

2023-08-16T16:27:24+00:00

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 Link: https://lore.kernel.org/r/20230807-resolve_cached-o_tmpfile-v3-1-e49323e1ef6f@cyphar.com Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman

io_uring: make io_kiocb_to_cmd() typesafe

2022-08-12T23:01:00+00:00

We need to make sure (at build time) that struct io_cmd_data is not casted to a structure that's larger. Signed-off-by: Stefan Metzmacher Link: https://lore.kernel.org/r/c024cdf25ae19fc0319d4180e2298bade8ed17b8.1660201408.git.metze@samba.org Signed-off-by: Jens Axboe

io_uring: split out fixed file installation and removal

2022-07-25T00:39:16+00:00

Put it with the filetable code, which is where it belongs. While doing so, have the helpers take a ctx rather than an io_kiocb. It doesn't make sense to use a request, as it's not an operation on the request itself. It applies to the ring itself. Signed-off-by: Jens Axboe

io_uring: kill extra io_uring_types.h includes

2022-07-25T00:39:14+00:00

io_uring/io_uring.h already includes io_uring_types.h, no need to include it every time. Kill it in a bunch of places, it prepares us for following patches. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/94d8c943fbe0ef949981c508ddcee7fc1c18850f.1655384063.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring: move rsrc related data, core, and commands

2022-07-25T00:39:12+00:00

Signed-off-by: Jens Axboe

io_uring: split out open/close operations

2022-07-25T00:39:11+00:00

Signed-off-by: Jens Axboe