diff options
| author | Gao Xiang <hsiangkao@redhat.com> | 2021-01-20 09:30:16 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-07 12:20:42 +0100 |
| commit | edaa0a0aab6e63b2ea7747f14daa68808ea4f36b (patch) | |
| tree | 0a6b889070a39cde52015358a464d51bf4fee530 | |
| parent | 706068d0811a6bce6e324d1a1c11fcd4d0047c60 (diff) | |
erofs: fix shift-out-of-bounds of blkszbits
commit bde545295b710bdd13a0fcd4b9fddd2383eeeb3a upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 0e369494f2f2..22e059b4f745 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -124,8 +124,8 @@ 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; } |