diff options
| author | Gao Xiang <hsiangkao@redhat.com> | 2021-01-20 09:30:16 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@redhat.com> | 2021-02-11 11:54:57 +0800 |
| commit | bde545295b710bdd13a0fcd4b9fddd2383eeeb3a (patch) | |
| tree | 6c9b5b38f12c7848d2833b6773eb33dfaa6f32fa | |
| parent | 19c329f6808995b142b3966301f217c831e7cf31 (diff) | |
| download | linux-bde545295b710bdd13a0fcd4b9fddd2383eeeb3a.tar.gz | |
erofs: fix shift-out-of-bounds of blkszbits
syzbot generated a crafted bitszbits which can be shifted out-of-bounds[1]. So directly print unsupported blkszbits instead of blksize. [1] https://lore.kernel.org/r/000000000000c72ddd05b9444d2f@google.com Link: https://lore.kernel.org/r/20210120013016.14071-1-hsiangkao@aol.com Reported-by: syzbot+c68f467cd7c45860e8d4@syzkaller.appspotmail.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
| -rw-r--r-- | fs/erofs/super.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/erofs/super.c b/fs/erofs/super.c index be10b16ea66e..d5a6b9b888a5 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -158,8 +158,8 @@ static int erofs_read_superblock(struct super_block *sb) blkszbits = dsb->blkszbits; /* 9(512 bytes) + LOG_SECTORS_PER_BLOCK == LOG_BLOCK_SIZE */ if (blkszbits != LOG_BLOCK_SIZE) { - erofs_err(sb, "blksize %u isn't supported on this platform", - 1 << blkszbits); + erofs_err(sb, "blkszbits %u isn't supported on this platform", + blkszbits); goto out; } |