From: Gao Xiang <redacted>
[ Upstream commit bde545295b710bdd13a0fcd4b9fddd2383eeeb3a ]
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 (local)
Link: https://lore.kernel.org/r/20210120013016.14071-1-hsiangkao@aol.com (local)
Reported-by: <redacted>
Reviewed-by: Chao Yu <redacted>
Signed-off-by: Gao Xiang <redacted>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/erofs/super.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index be10b16ea66ee..d5a6b9b888a56 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;
}
--
2.27.0