b612f924f2
commit 63095f4f3af59322bea984a6ae44337439348fe0 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> |
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| .. | ||
| aops.c | ||
| aops.h | ||
| attrib.c | ||
| 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 | ||
| 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 | ||
| sysctl.c | ||
| sysctl.h | ||
| time.h | ||
| types.h | ||
| unistr.c | ||
| upcase.c | ||
| usnjrnl.c | ||
| usnjrnl.h | ||
| volume.h | ||