Hawkins Jiawei 957732a09c ntfs: check overflow when iterating ATTR_RECORDs ... commit 63095f4f3a upstream. Kernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). Because the ATTR_RECORDs are next to each other, kernel can get the next ATTR_RECORD from end address of current ATTR_RECORD, through current ATTR_RECORD length field. The problem is that during iteration, when kernel calculates the end address of current ATTR_RECORD, kernel may trigger an integer overflow bug in executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a->length))`. This may wrap, leading to a forever iteration on 32bit systems. This patch solves it by adding some checks on calculating end address of current ATTR_RECORD during iteration. Link: https://lkml.kernel.org/r/20220831160935.3409-4-yin31149@gmail.com Link: https://lore.kernel.org/all/20220827105842.GM2030@kadam/ Signed-off-by: Hawkins Jiawei <yin31149@gmail.com> Suggested-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Anton Altaparmakov <anton@tuxera.com> Cc: chenxiaosong (A) <chenxiaosong2@huawei.com> Cc: syzkaller-bugs <syzkaller-bugs@googlegroups.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-11-25 17:45:57 +01:00
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aops.c
aops.h
attrib.c	ntfs: check overflow when iterating ATTR_RECORDs	2022-11-25 17:45:57 +01:00
attrib.h
bitmap.c
bitmap.h
collate.c
collate.h
compress.c
debug.c
debug.h
dir.c
dir.h
endian.h
file.c
index.c
index.h
inode.c	ntfs: fix use-after-free in ntfs_attr_find()	2022-11-25 17:45:57 +01:00
inode.h
Kconfig
layout.h
lcnalloc.c
lcnalloc.h
logfile.c
logfile.h
Makefile
malloc.h
mft.c
mft.h
mst.c
namei.c
ntfs.h
quota.c
quota.h
runlist.c
runlist.h
super.c	ntfs: fix BUG_ON in ntfs_lookup_inode_by_name()	2022-10-05 10:38:39 +02:00
sysctl.c
sysctl.h
time.h
types.h
unistr.c
upcase.c
usnjrnl.c
usnjrnl.h
volume.h