From: Gao Xiang hsiangkao@linux.alibaba.com
[ Upstream commit 12724ba38992bd045e92a9a88a868a530f89d13e ]
As reported by syzbot [1], kvcalloc() cannot work with __GFP_NOFAIL. Let's use kcalloc() instead.
[1] https://lore.kernel.org/r/0000000000007796bd05f1852ec2@google.com
Reported-by: syzbot+c3729cda01706a04fb98@syzkaller.appspotmail.com Fixes: fe3e5914e6dc ("erofs: try to leave (de)compressed_pages on stack if possible") Fixes: 4f05687fd703 ("erofs: introduce struct z_erofs_decompress_backend") Reviewed-by: Chao Yu chao@kernel.org Signed-off-by: Gao Xiang hsiangkao@linux.alibaba.com Link: https://lore.kernel.org/r/20230110074927.41651-1-hsiangkao@linux.alibaba.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/erofs/zdata.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index cf4871834ebb..ee7c88c9b5af 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -1047,12 +1047,12 @@ static int z_erofs_decompress_pcluster(struct z_erofs_decompress_backend *be,
if (!be->decompressed_pages) be->decompressed_pages = - kvcalloc(be->nr_pages, sizeof(struct page *), - GFP_KERNEL | __GFP_NOFAIL); + kcalloc(be->nr_pages, sizeof(struct page *), + GFP_KERNEL | __GFP_NOFAIL); if (!be->compressed_pages) be->compressed_pages = - kvcalloc(pclusterpages, sizeof(struct page *), - GFP_KERNEL | __GFP_NOFAIL); + kcalloc(pclusterpages, sizeof(struct page *), + GFP_KERNEL | __GFP_NOFAIL);
z_erofs_parse_out_bvecs(be); err2 = z_erofs_parse_in_bvecs(be, &overlapped); @@ -1100,7 +1100,7 @@ static int z_erofs_decompress_pcluster(struct z_erofs_decompress_backend *be, } if (be->compressed_pages < be->onstack_pages || be->compressed_pages >= be->onstack_pages + Z_EROFS_ONSTACK_PAGES) - kvfree(be->compressed_pages); + kfree(be->compressed_pages); z_erofs_fill_other_copies(be, err);
for (i = 0; i < be->nr_pages; ++i) { @@ -1119,7 +1119,7 @@ static int z_erofs_decompress_pcluster(struct z_erofs_decompress_backend *be, }
if (be->decompressed_pages != be->onstack_pages) - kvfree(be->decompressed_pages); + kfree(be->decompressed_pages);
pcl->length = 0; pcl->partial = true;