mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-16 11:21:26 -04:00
Code Issues Packages Projects Releases Wiki Activity

io_uring/zcrx: don't clear not allocated niovs

Browse Source 
Now that area->is_mapped is set earlier before niovs array is allocated,
io_zcrx_free_area -> io_zcrx_unmap_area in an error path can try to
clear dma addresses for unallocated niovs, fix it.

Fixes: 8c0cab0b7bf7 ("io_uring/zcrx: always dma map in advance")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/cbcb7749b5a001ecd4d1c303515ce9403215640c.1774780198.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov
2026-03-31 22:07:41 +01:00
committed by Jens Axboe
parent 8ae2837d5a
commit 52dcd1776b
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
io_uring/zcrx.c
View File

@@ -289,8 +289,10 @@ static void io_zcrx_unmap_area(struct io_zcrx_ifq *ifq,
return;
area->is_mapped = false;
for (i = 0; i < area->nia.num_niovs; i++)
net_mp_niov_set_dma_addr(&area->nia.niovs[i], 0);
if (area->nia.niovs) {
for (i = 0; i < area->nia.num_niovs; i++)
net_mp_niov_set_dma_addr(&area->nia.niovs[i], 0);
}
if (area->mem.is_dmabuf) {
io_release_dmabuf(&area->mem);