В ядре Linux устранена следующая уязвимость:
net/sched: act_ife: избежать возможного разыменования NULL
tcf_ife_encode() должен убедиться, что ife_encode() не возвращает NULL.
syzbot сообщил:
Упс: общая ошибка защиты, вероятно, для неканонического адреса 0xdffffc0000000000:0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref в диапазоне [0x0000000000000000-0x0000000000000007]
RIP: 0010:ife_tlv_meta_encode+0x41/0xa0 net/ife/ife.c:166
ЦП: 3 UID: 0 PID: 8990 Связь: syz.0.696 Не испорченный syzkaller #0 PREEMPT(полный)
Отслеживание вызова:
<ЗАДАЧА>
ife_encode_meta_u32+0x153/0x180 net/sched/act_ife.c:101
tcf_ife_encode net/sched/act_ife.c:841 [встроенный]
tcf_ife_act+0x1022/0x1de0 net/sched/act_ife.c:877
tc_act include/net/tc_wrapper.h:130 [встроенный]
tcf_action_exec+0x1c0/0xa20 net/sched/act_api.c:1152
tcf_exts_exec include/net/pkt_cls.h:349 [встроенный]
mall_classify+0x1a0/0x2a0 net/sched/cls_matchall.c:42
tc_classify include/net/tc_wrapper.h:197 [встроенный]
__tcf_classify net/sched/cls_api.c:1764 [встроенный]
tcf_classify+0x7f2/0x1380 net/sched/cls_api.c:1860
multiq_classify net/sched/sch_multiq.c:39 [встроенный]
multiq_enqueue+0xe0/0x510 net/sched/sch_multiq.c:66
dev_qdisc_enqueue+0x45/0x250 net/core/dev.c:4147
__dev_xmit_skb net/core/dev.c:4262 [встроенный]
__dev_queue_xmit+0x2998/0x46c0 net/core/dev.c:4798
Показать оригинальное описание (EN)
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ife: avoid possible NULL deref tcf_ife_encode() must make sure ife_encode() does not return NULL. syzbot reported: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:ife_tlv_meta_encode+0x41/0xa0 net/ife/ife.c:166 CPU: 3 UID: 0 PID: 8990 Comm: syz.0.696 Not tainted syzkaller #0 PREEMPT(full) Call Trace: <TASK> ife_encode_meta_u32+0x153/0x180 net/sched/act_ife.c:101 tcf_ife_encode net/sched/act_ife.c:841 [inline] tcf_ife_act+0x1022/0x1de0 net/sched/act_ife.c:877 tc_act include/net/tc_wrapper.h:130 [inline] tcf_action_exec+0x1c0/0xa20 net/sched/act_api.c:1152 tcf_exts_exec include/net/pkt_cls.h:349 [inline] mall_classify+0x1a0/0x2a0 net/sched/cls_matchall.c:42 tc_classify include/net/tc_wrapper.h:197 [inline] __tcf_classify net/sched/cls_api.c:1764 [inline] tcf_classify+0x7f2/0x1380 net/sched/cls_api.c:1860 multiq_classify net/sched/sch_multiq.c:39 [inline] multiq_enqueue+0xe0/0x510 net/sched/sch_multiq.c:66 dev_qdisc_enqueue+0x45/0x250 net/core/dev.c:4147 __dev_xmit_skb net/core/dev.c:4262 [inline] __dev_queue_xmit+0x2998/0x46c0 net/core/dev.c:4798
Характеристики атаки
Последствия
Строка CVSS v3.1
Тип уязвимости (CWE)
Уязвимые продукты 12
| Конфигурация | От (включительно) | До (исключительно) |
|---|---|---|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
|
4.11
|
5.10.249
|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
|
5.11
|
5.15.199
|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
|
5.16
|
6.1.162
|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
|
6.2
|
6.6.122
|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
|
6.7
|
6.12.68
|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
|
6.13
|
6.18.8
|
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
|
— | — |
|
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
|
— | — |