* [PATCH next] io_uring/region: return negative -E2BIG in io_create_region()
@ 2024-11-20 9:15 Dan Carpenter
2024-11-20 14:13 ` Jens Axboe
0 siblings, 1 reply; 2+ messages in thread
From: Dan Carpenter @ 2024-11-20 9:15 UTC (permalink / raw)
To: Pavel Begunkov; +Cc: Jens Axboe, io-uring, linux-kernel, kernel-janitors
This code accidentally returns positivie E2BIG instead of negative
-E2BIG. The callers treat negatives and positives the same so this
doesn't affect the kernel. The error code is returned to userspace via
the system call.
Fixes: dfbbfbf19187 ("io_uring: introduce concept of memory regions")
Signed-off-by: Dan Carpenter <[email protected]>
---
io_uring/memmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/io_uring/memmap.c b/io_uring/memmap.c
index 6e6ee79ba94f..3d71756bc598 100644
--- a/io_uring/memmap.c
+++ b/io_uring/memmap.c
@@ -229,7 +229,7 @@ int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr,
if (!reg->size || reg->mmap_offset || reg->id)
return -EINVAL;
if ((reg->size >> PAGE_SHIFT) > INT_MAX)
- return E2BIG;
+ return -E2BIG;
if ((reg->user_addr | reg->size) & ~PAGE_MASK)
return -EINVAL;
if (check_add_overflow(reg->user_addr, reg->size, &end))
--
2.45.2
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2024-11-20 9:15 [PATCH next] io_uring/region: return negative -E2BIG in io_create_region() Dan Carpenter
2024-11-20 14:13 ` Jens Axboe
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