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- Fix a KMSAN uninit-value issue triggered by a crafted image;
 
  - Fix VMA alignment for memory mapped files on THP.
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Merge tag 'erofs-for-6.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

Pull erofs fixes from Gao Xiang:
 "The main one is a KMSAN fix which addresses an issue introduced in
  this cycle so it'd be much better to fix before releasing, and the
  remaining one fixes VMA alignment for THP.

  Summary:

   - Fix a KMSAN uninit-value issue triggered by a crafted image

   - Fix VMA alignment for memory mapped files on THP"

* tag 'erofs-for-6.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: apply proper VMA alignment for memory mapped files on THP
  erofs: fix uninitialized page cache reported by KMSAN
This commit is contained in:
Linus Torvalds 2024-03-07 09:31:47 -08:00
commit d0e88885b8
2 changed files with 3 additions and 1 deletions
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1
fs/erofs/data.c
View File

@ -447,5 +447,6 @@ const struct file_operations erofs_file_fops = {
.llseek = generic_file_llseek,
.read_iter = erofs_file_read_iter,
.mmap = erofs_file_mmap,
.get_unmapped_area = thp_get_unmapped_area,
.splice_read = filemap_splice_read,
};

3
fs/erofs/decompressor.c
View File

@ -323,7 +323,8 @@ static int z_erofs_transform_plain(struct z_erofs_decompress_req *rq,
unsigned int cur = 0, ni = 0, no, pi, po, insz, cnt;
u8 *kin;
DBG_BUGON(rq->outputsize > rq->inputsize);
if (rq->outputsize > rq->inputsize)
return -EOPNOTSUPP;
if (rq->alg == Z_EROFS_COMPRESSION_INTERLACED) {
cur = bs - (rq->pageofs_out & (bs - 1));
pi = (rq->pageofs_in + rq->inputsize - cur) & ~PAGE_MASK;