jfs: xattr: fix buffer overflow for invalid xattr
mainline inclusion from mainline-v6.10-rc1 commit 7c55b78818cfb732680c4a72ab270cc2d2ee3d0f category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAD0FK CVE: CVE-2024-40902 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7c55b78818cfb732680c4a72ab270cc2d2ee3d0f -------------------------------- When an xattr size is not what is expected, it is printed out to the kernel log in hex format as a form of debugging. But when that xattr size is bigger than the expected size, printing it out can cause an access off the end of the buffer. Fix this all up by properly restricting the size of the debug hex dump in the kernel log. Reported-by:<syzbot+9dfe490c8176301c1d06@syzkaller.appspotmail.com> Cc: Dave Kleikamp <shaggy@kernel.org> Link: https://lore.kernel.org/r/2024051433-slider-cloning-98f9@gregkh Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
Xia Fukun <xiafukun@huawei.com>
Loading
Please register or sign in to comment