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| author | Pavel Begunkov <asml.silence@gmail.com> | 2024-03-12 14:56:27 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-03 15:28:31 +0200 |
| commit | 1241052e158d8088faee46ceb5879c74af0b4943 (patch) | |
| tree | ffabbd66d374a93373708f9658211e689bf924b2 /io_uring | |
| parent | e8fc78a1c70fe82b32420e5632ade2937942a3f9 (diff) | |
| download | linux-1241052e158d8088faee46ceb5879c74af0b4943.tar.gz linux-1241052e158d8088faee46ceb5879c74af0b4943.tar.bz2 linux-1241052e158d8088faee46ceb5879c74af0b4943.zip | |
io_uring: clean rings on NO_MMAP alloc fail
[ Upstream commit cef59d1ea7170ec753182302645a0191c8aa3382 ]
We make a few cancellation judgements based on ctx->rings, so let's
zero it afer deallocation for IORING_SETUP_NO_MMAP just like it's
done with the mmap case. Likely, it's not a real problem, but zeroing
is safer and better tested.
Cc: stable@vger.kernel.org
Fixes: 03d89a2de25bbc ("io_uring: support for user allocated memory for rings/sqes")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/9ff6cdf91429b8a51699c210e1f6af6ea3f8bdcf.1710255382.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/io_uring.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index aabb367b24bc..aed10bae50ac 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2750,14 +2750,15 @@ static void io_rings_free(struct io_ring_ctx *ctx) if (!(ctx->flags & IORING_SETUP_NO_MMAP)) { io_mem_free(ctx->rings); io_mem_free(ctx->sq_sqes); - ctx->rings = NULL; - ctx->sq_sqes = NULL; } else { io_pages_free(&ctx->ring_pages, ctx->n_ring_pages); ctx->n_ring_pages = 0; io_pages_free(&ctx->sqe_pages, ctx->n_sqe_pages); ctx->n_sqe_pages = 0; } + + ctx->rings = NULL; + ctx->sq_sqes = NULL; } void *io_mem_alloc(size_t size) |