漏洞信息
# hfs/hfsplus:修复 hfs_bnode_read_key 中的 slab-out-of-bounds 问题
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漏洞标题
hfs/hfsplus: fix slab-out-of-bounds in hfs_bnode_read_key
漏洞描述信息
In the Linux kernel, the following vulnerability has been resolved:
hfs/hfsplus: fix slab-out-of-bounds in hfs_bnode_read_key
Syzbot reported an issue in hfs subsystem:
BUG: KASAN: slab-out-of-bounds in memcpy_from_page include/linux/highmem.h:423 [inline]
BUG: KASAN: slab-out-of-bounds in hfs_bnode_read fs/hfs/bnode.c:35 [inline]
BUG: KASAN: slab-out-of-bounds in hfs_bnode_read_key+0x314/0x450 fs/hfs/bnode.c:70
Write of size 94 at addr ffff8880123cd100 by task syz-executor237/5102
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
__asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
memcpy_from_page include/linux/highmem.h:423 [inline]
hfs_bnode_read fs/hfs/bnode.c:35 [inline]
hfs_bnode_read_key+0x314/0x450 fs/hfs/bnode.c:70
hfs_brec_insert+0x7f3/0xbd0 fs/hfs/brec.c:159
hfs_cat_create+0x41d/0xa50 fs/hfs/catalog.c:118
hfs_mkdir+0x6c/0xe0 fs/hfs/dir.c:232
vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4257
do_mkdirat+0x264/0x3a0 fs/namei.c:4280
__do_sys_mkdir fs/namei.c:4300 [inline]
__se_sys_mkdir fs/namei.c:4298 [inline]
__x64_sys_mkdir+0x6c/0x80 fs/namei.c:4298
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbdd6057a99
Add a check for key length in hfs_bnode_read_key to prevent
out-of-bounds memory access. If the key length is invalid, the
key buffer is cleared, improving stability and reliability.
CVSS信息
N/A
漏洞类别
N/A
漏洞标题
Linux kernel 安全漏洞
漏洞描述信息
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞,该漏洞源于hfs_bnode_read_key中存在越界写入。
CVSS信息
N/A
漏洞类别
其他