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Yan Zheng wrote: > I think I found a bug in ext4/extents.c, "ext4_ext_put_in_cache" uses > "__u32" to receive physical block number. "ext4_ext_put_in_cache" is > used in "ext4_ext_get_blocks", it sets ext4 inode's extent cache > according most recently tree lookup (higher 16 bits of saved physical > block number are always zero). when serving a mapping request, > "ext4_ext_get_blocks" first check whether the logical block is in > inode's extent cache. if the logical block is in the cache and the > cached region isn't a gap, "ext4_ext_get_blocks" gets physical block > number by using cached region's physical block number and offset in > the cached region. as described above, "ext4_ext_get_blocks" may > return wrong result when there are physical block numbers bigger than > 0xffffffff. > You are right. Thanks for reporting this! Signed-off-by: Mingming Cao <cmm@us.ibm.com> Cc: Yan Zheng <yanzheng@21cn.com> Cc: <stable@kernel.org> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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.. | ||
acl.c | ||
acl.h | ||
balloc.c | ||
bitmap.c | ||
dir.c | ||
ext4_jbd2.c | ||
extents.c | ||
file.c | ||
fsync.c | ||
hash.c | ||
ialloc.c | ||
inode.c | ||
ioctl.c | ||
Makefile | ||
namei.c | ||
namei.h | ||
resize.c | ||
super.c | ||
symlink.c | ||
xattr.c | ||
xattr.h | ||
xattr_security.c | ||
xattr_trusted.c | ||
xattr_user.c |