vulnerability

Ubuntu: (Multiple Advisories) (CVE-2024-35976): Linux kernel vulnerabilities

Severity
6
CVSS
(AV:L/AC:H/Au:N/C:C/I:C/A:N)
Published
05/20/2024
Added
07/12/2024
Modified
02/18/2025

Description

In the Linux kernel, the following vulnerability has been resolved:

xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING

syzbot reported an illegal copy in xsk_setsockopt() [1]

Make sure to validate setsockopt() @optlen parameter.

[1]

BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset include/linux/sockptr.h:49 [inline]
BUG: KASAN: slab-out-of-bounds in copy_from_sockptr include/linux/sockptr.h:55 [inline]
BUG: KASAN: slab-out-of-bounds in xsk_setsockopt+0x909/0xa40 net/xdp/xsk.c:1420
Read of size 4 at addr ffff888028c6cde3 by task syz-executor.0/7549

CPU: 0 PID: 7549 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:

__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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
copy_from_sockptr_offset include/linux/sockptr.h:49 [inline]
copy_from_sockptr include/linux/sockptr.h:55 [inline]
xsk_setsockopt+0x909/0xa40 net/xdp/xsk.c:1420
do_sock_setsockopt+0x3af/0x720 net/socket.c:2311
__sys_setsockopt+0x1ae/0x250 net/socket.c:2334
__do_sys_setsockopt net/socket.c:2343 [inline]
__se_sys_setsockopt net/socket.c:2340 [inline]
__x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fb40587de69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 RSP: 002b:00007fb40665a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fb4059abf80 RCX: 00007fb40587de69
RDX: 0000000000000005 RSI: 000000000000011b RDI: 0000000000000006
RBP: 00007fb4058ca47a R08: 0000000000000002 R09: 0000000000000000
R10: 0000000020001980 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb4059abf80 R15: 00007fff57ee4d08


Allocated by task 7549:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slub.c:3966 [inline]
__kmalloc+0x233/0x4a0 mm/slub.c:3979
kmalloc include/linux/slab.h:632 [inline]
__cgroup_bpf_run_filter_setsockopt+0xd2f/0x1040 kernel/bpf/cgroup.c:1869
do_sock_setsockopt+0x6b4/0x720 net/socket.c:2293
__sys_setsockopt+0x1ae/0x250 net/socket.c:2334
__do_sys_setsockopt net/socket.c:2343 [inline]
__se_sys_setsockopt net/socket.c:2340 [inline]
__x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75

The buggy address belongs to the object at ffff888028c6cde0
which belongs to the cache kmalloc-8 of size 8
The buggy address is located 1 bytes to the right of
allocated 2-byte region [ffff888028c6cde0, ffff888028c6cde2)

The buggy address belongs to the physical page:
page:ffffea0000a31b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888028c6c9c0 pfn:0x28c6c
anon flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff888014c41280 0000000000000000 dead000000000001
raw: ffff888028c6c9c0 0000000080800057 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 6648, tgid 6644 (syz-executor.0), ts 133906047828, free_ts 133859922223
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
prep_new_page mm/page_alloc.c:
---truncated---

Solution(s)

ubuntu-upgrade-linux-image-5-15-0-1035-xilinx-zynqmpubuntu-upgrade-linux-image-5-15-0-1048-gkeopubuntu-upgrade-linux-image-5-15-0-1058-ibmubuntu-upgrade-linux-image-5-15-0-1058-raspiubuntu-upgrade-linux-image-5-15-0-1060-intel-iotgubuntu-upgrade-linux-image-5-15-0-1060-nvidiaubuntu-upgrade-linux-image-5-15-0-1060-nvidia-lowlatencyubuntu-upgrade-linux-image-5-15-0-1062-gkeubuntu-upgrade-linux-image-5-15-0-1062-kvmubuntu-upgrade-linux-image-5-15-0-1063-oracleubuntu-upgrade-linux-image-5-15-0-1064-gcpubuntu-upgrade-linux-image-5-15-0-1065-awsubuntu-upgrade-linux-image-5-15-0-1065-gcpubuntu-upgrade-linux-image-5-15-0-1068-azureubuntu-upgrade-linux-image-5-15-0-1068-azure-fdeubuntu-upgrade-linux-image-5-15-0-116-genericubuntu-upgrade-linux-image-5-15-0-116-generic-64kubuntu-upgrade-linux-image-5-15-0-116-generic-lpaeubuntu-upgrade-linux-image-5-15-0-116-lowlatencyubuntu-upgrade-linux-image-5-15-0-116-lowlatency-64kubuntu-upgrade-linux-image-5-4-0-1042-iotubuntu-upgrade-linux-image-5-4-0-1049-xilinx-zynqmpubuntu-upgrade-linux-image-5-4-0-1077-ibmubuntu-upgrade-linux-image-5-4-0-1090-bluefieldubuntu-upgrade-linux-image-5-4-0-1097-gkeopubuntu-upgrade-linux-image-5-4-0-1114-raspiubuntu-upgrade-linux-image-5-4-0-1118-kvmubuntu-upgrade-linux-image-5-4-0-1129-oracleubuntu-upgrade-linux-image-5-4-0-1130-awsubuntu-upgrade-linux-image-5-4-0-1134-gcpubuntu-upgrade-linux-image-5-4-0-1135-azureubuntu-upgrade-linux-image-5-4-0-192-genericubuntu-upgrade-linux-image-5-4-0-192-generic-lpaeubuntu-upgrade-linux-image-5-4-0-192-lowlatencyubuntu-upgrade-linux-image-6-8-0-1006-gkeubuntu-upgrade-linux-image-6-8-0-1007-intelubuntu-upgrade-linux-image-6-8-0-1007-raspiubuntu-upgrade-linux-image-6-8-0-1008-ibmubuntu-upgrade-linux-image-6-8-0-1008-oemubuntu-upgrade-linux-image-6-8-0-1008-oracleubuntu-upgrade-linux-image-6-8-0-1008-oracle-64kubuntu-upgrade-linux-image-6-8-0-1009-nvidiaubuntu-upgrade-linux-image-6-8-0-1009-nvidia-64kubuntu-upgrade-linux-image-6-8-0-1010-azureubuntu-upgrade-linux-image-6-8-0-1010-azure-fdeubuntu-upgrade-linux-image-6-8-0-1010-gcpubuntu-upgrade-linux-image-6-8-0-1011-awsubuntu-upgrade-linux-image-6-8-0-38-genericubuntu-upgrade-linux-image-6-8-0-38-generic-64kubuntu-upgrade-linux-image-6-8-0-38-lowlatencyubuntu-upgrade-linux-image-6-8-0-38-lowlatency-64kubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-aws-lts-20-04ubuntu-upgrade-linux-image-aws-lts-22-04ubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-cvmubuntu-upgrade-linux-image-azure-fdeubuntu-upgrade-linux-image-azure-fde-lts-22-04ubuntu-upgrade-linux-image-azure-lts-20-04ubuntu-upgrade-linux-image-azure-lts-22-04ubuntu-upgrade-linux-image-bluefieldubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-gcp-lts-20-04ubuntu-upgrade-linux-image-gcp-lts-22-04ubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-hwe-20-04ubuntu-upgrade-linux-image-generic-64k-hwe-24-04ubuntu-upgrade-linux-image-generic-hwe-18-04ubuntu-upgrade-linux-image-generic-hwe-20-04ubuntu-upgrade-linux-image-generic-hwe-24-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-generic-lpae-hwe-20-04ubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-gke-5-15ubuntu-upgrade-linux-image-gkeopubuntu-upgrade-linux-image-gkeop-5-15ubuntu-upgrade-linux-image-gkeop-5-4ubuntu-upgrade-linux-image-ibmubuntu-upgrade-linux-image-ibm-classicubuntu-upgrade-linux-image-ibm-lts-20-04ubuntu-upgrade-linux-image-ibm-lts-24-04ubuntu-upgrade-linux-image-intelubuntu-upgrade-linux-image-intel-iotgubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-64kubuntu-upgrade-linux-image-lowlatency-64k-hwe-20-04ubuntu-upgrade-linux-image-lowlatency-hwe-18-04ubuntu-upgrade-linux-image-lowlatency-hwe-20-04ubuntu-upgrade-linux-image-nvidiaubuntu-upgrade-linux-image-nvidia-64kubuntu-upgrade-linux-image-nvidia-lowlatencyubuntu-upgrade-linux-image-oemubuntu-upgrade-linux-image-oem-20-04ubuntu-upgrade-linux-image-oem-20-04bubuntu-upgrade-linux-image-oem-20-04cubuntu-upgrade-linux-image-oem-20-04dubuntu-upgrade-linux-image-oem-24-04ubuntu-upgrade-linux-image-oem-24-04aubuntu-upgrade-linux-image-oem-osp1ubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-64kubuntu-upgrade-linux-image-oracle-lts-20-04ubuntu-upgrade-linux-image-oracle-lts-22-04ubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-raspi-hwe-18-04ubuntu-upgrade-linux-image-raspi-nolpaeubuntu-upgrade-linux-image-raspi2ubuntu-upgrade-linux-image-snapdragon-hwe-18-04ubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-18-04ubuntu-upgrade-linux-image-virtual-hwe-20-04ubuntu-upgrade-linux-image-virtual-hwe-24-04ubuntu-upgrade-linux-image-xilinx-zynqmp
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