一、漏洞信息
漏洞编号:CVE-2022-48689
漏洞归属组件:kernel
漏洞归属的版本:4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0
CVSS V3.0分值:
BaseScore:7.0 High
Vector:CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
漏洞简述:
In the Linux kernel, the following vulnerability has been resolved:tcp: TX zerocopy should not sense pfmemalloc statusWe got a recent syzbot report [1] showing a possible misuseof pfmemalloc page status in TCP zerocopy paths.Indeed, for pages coming from user space or other layers,using page_is_pfmemalloc() is moot, and possibly could givefalse positives.There has been attempts to make page_is_pfmemalloc() more robust,but not using it in the first place in this context is probably better,removing cpu cycles.Note to stable teams :You need to backport 84ce071e38a6 ( net: introduce__skb_fill_page_desc_noacc ) as a prereq.Race is more probable after commit c07aea3ef4d4( mm: add a signature in struct page ) because page_is_pfmemalloc()is now using low order bit from page->lru.next, which can changemore often than page->index.Low order bit should never be set for lru.next (when used as an anchorin LRU list), so KCSAN report is mostly a false positive.Backporting to older kernel versions seems not necessary.[1]BUG: KCSAN: data-race in lru_add_fn / tcp_build_fragwrite to 0xffffea0004a1d2c8 of 8 bytes by task 18600 on cpu 0:__list_add include/linux/list.h:73 [inline]list_add include/linux/list.h:88 [inline]lruvec_add_folio include/linux/mm_inline.h:105 [inline]lru_add_fn+0x440/0x520 mm/swap.c:228folio_batch_move_lru+0x1e1/0x2a0 mm/swap.c:246folio_batch_add_and_move mm/swap.c:263 [inline]folio_add_lru+0xf1/0x140 mm/swap.c:490filemap_add_folio+0xf8/0x150 mm/filemap.c:948__filemap_get_folio+0x510/0x6d0 mm/filemap.c:1981pagecache_get_page+0x26/0x190 mm/folio-compat.c:104grab_cache_page_write_begin+0x2a/0x30 mm/folio-compat.c:116ext4_da_write_begin+0x2dd/0x5f0 fs/ext4/inode.c:2988generic_perform_write+0x1d4/0x3f0 mm/filemap.c:3738ext4_buffered_write_iter+0x235/0x3e0 fs/ext4/file.c:270ext4_file_write_iter+0x2e3/0x1210call_write_iter include/linux/fs.h:2187 [inline]new_sync_write fs/read_write.c:491 [inline]vfs_write+0x468/0x760 fs/read_write.c:578ksys_write+0xe8/0x1a0 fs/read_write.c:631__do_sys_write fs/read_write.c:643 [inline]__se_sys_write fs/read_write.c:640 [inline]__x64_sys_write+0x3e/0x50 fs/read_write.c:640do_syscall_x64 arch/x86/entry/common.c:50 [inline]do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80entry_SYSCALL_64_after_hwframe+0x63/0xcdread to 0xffffea0004a1d2c8 of 8 bytes by task 18611 on cpu 1:page_is_pfmemalloc include/linux/mm.h:1740 [inline]__skb_fill_page_desc include/linux/skbuff.h:2422 [inline]skb_fill_page_desc include/linux/skbuff.h:2443 [inline]tcp_build_frag+0x613/0xb20 net/ipv4/tcp.c:1018do_tcp_sendpages+0x3e8/0xaf0 net/ipv4/tcp.c:1075tcp_sendpage_locked net/ipv4/tcp.c:1140 [inline]tcp_sendpage+0x89/0xb0 net/ipv4/tcp.c:1150inet_sendpage+0x7f/0xc0 net/ipv4/af_inet.c:833kernel_sendpage+0x184/0x300 net/socket.c:3561sock_sendpage+0x5a/0x70 net/socket.c:1054pipe_to_sendpage+0x128/0x160 fs/splice.c:361splice_from_pipe_feed fs/splice.c:415 [inline]__splice_from_pipe+0x222/0x4d0 fs/splice.c:559splice_from_pipe fs/splice.c:594 [inline]generic_splice_sendpage+0x89/0xc0 fs/splice.c:743do_splice_from fs/splice.c:764 [inline]direct_splice_actor+0x80/0xa0 fs/splice.c:931splice_direct_to_actor+0x305/0x620 fs/splice.c:886do_splice_direct+0xfb/0x180 fs/splice.c:974do_sendfile+0x3bf/0x910 fs/read_write.c:1249__do_sys_sendfile64 fs/read_write.c:1317 [inline]__se_sys_sendfile64 fs/read_write.c:1303 [inline]__x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1303do_syscall_x64 arch/x86/entry/common.c:50 [inline]do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80entry_SYSCALL_64_after_hwframe+0x63/0xcdvalue changed: 0x0000000000000000 -> 0xffffea0004a1d288Reported by Kernel Concurrency Sanitizer on:CPU: 1 PID: 18611 Comm: syz-executor.4 Not tainted 6.0.0-rc2-syzkaller-00248-ge022620b5d05-dirty #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
漏洞公开时间:2024-05-03 23:15:07
漏洞创建时间:2024-05-03 23:29:32
漏洞详情参考链接:
https://nvd.nist.gov/vuln/detail/CVE-2022-48689
漏洞分析指导链接:
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
漏洞数据来源:
openBrain开源漏洞感知系统
漏洞补丁信息:
二、漏洞分析结构反馈
影响性分析说明:
In the Linux kernel, the following vulnerability has been resolved:tcp: TX zerocopy should not sense pfmemalloc statusWe got a recent syzbot report [1] showing a possible misuseof pfmemalloc page status in TCP zerocopy paths.Indeed, for pages coming from user space or other layers,using page_is_pfmemalloc() is moot, and possibly could givefalse positives.There has been attempts to make page_is_pfmemalloc() more robust,but not using it in the first place in this context is probably better,removing cpu cycles.Note to stable teams :You need to backport 84ce071e38a6 ( net: introduce__skb_fill_page_desc_noacc ) as a prereq.Race is more probable after commit c07aea3ef4d4( mm: add a signature in struct page ) because page_is_pfmemalloc()is now using low order bit from page->lru.next, which can changemore often than page->index.Low order bit should never be set for lru.next (when used as an anchorin LRU list), so KCSAN report is mostly a false positive.Backporting to older kernel versions seems not necessary.[1]BUG: KCSAN: data-race in lru_add_fn / tcp_build_fragwrite to 0xffffea0004a1d2c8 of 8 bytes by task 18600 on cpu 0:__list_add include/linux/list.h:73 [inline]list_add include/linux/list.h:88 [inline]lruvec_add_folio include/linux/mm_inline.h:105 [inline]lru_add_fn+0x440/0x520 mm/swap.c:228folio_batch_move_lru+0x1e1/0x2a0 mm/swap.c:246folio_batch_add_and_move mm/swap.c:263 [inline]folio_add_lru+0xf1/0x140 mm/swap.c:490filemap_add_folio+0xf8/0x150 mm/filemap.c:948__filemap_get_folio+0x510/0x6d0 mm/filemap.c:1981pagecache_get_page+0x26/0x190 mm/folio-compat.c:104grab_cache_page_write_begin+0x2a/0x30 mm/folio-compat.c:116ext4_da_write_begin+0x2dd/0x5f0 fs/ext4/inode.c:2988generic_perform_write+0x1d4/0x3f0 mm/filemap.c:3738ext4_buffered_write_iter+0x235/0x3e0 fs/ext4/file.c:270ext4_file_write_iter+0x2e3/0x1210call_write_iter include/linux/fs.h:2187 [inline]new_sync_write fs/read_write.c:491 [inline]vfs_write+0x468/0x760 fs/read_write.c:578ksys_write+0xe8/0x1a0 fs/read_write.c:631__do_sys_write fs/read_write.c:643 [inline]__se_sys_write fs/read_write.c:640 [inline]__x64_sys_write+0x3e/0x50 fs/read_write.c:640do_syscall_x64 arch/x86/entry/common.c:50 [inline]do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80entry_SYSCALL_64_after_hwframe+0x63/0xcdread to 0xffffea0004a1d2c8 of 8 bytes by task 18611 on cpu 1:page_is_pfmemalloc include/linux/mm.h:1740 [inline]__skb_fill_page_desc include/linux/skbuff.h:2422 [inline]skb_fill_page_desc include/linux/skbuff.h:2443 [inline]tcp_build_frag+0x613/0xb20 net/ipv4/tcp.c:1018do_tcp_sendpages+0x3e8/0xaf0 net/ipv4/tcp.c:1075tcp_sendpage_locked net/ipv4/tcp.c:1140 [inline]tcp_sendpage+0x89/0xb0 net/ipv4/tcp.c:1150inet_sendpage+0x7f/0xc0 net/ipv4/af_inet.c:833kernel_sendpage+0x184/0x300 net/socket.c:3561sock_sendpage+0x5a/0x70 net/socket.c:1054pipe_to_sendpage+0x128/0x160 fs/splice.c:361splice_from_pipe_feed fs/splice.c:415 [inline]__splice_from_pipe+0x222/0x4d0 fs/splice.c:559splice_from_pipe fs/splice.c:594 [inline]generic_splice_sendpage+0x89/0xc0 fs/splice.c:743do_splice_from fs/splice.c:764 [inline]direct_splice_actor+0x80/0xa0 fs/splice.c:931splice_direct_to_actor+0x305/0x620 fs/splice.c:886do_splice_direct+0xfb/0x180 fs/splice.c:974do_sendfile+0x3bf/0x910 fs/read_write.c:1249__do_sys_sendfile64 fs/read_write.c:1317 [inline]__se_sys_sendfile64 fs/read_write.c:1303 [inline]__x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1303do_syscall_x64 arch/x86/entry/common.c:50 [inline]do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80entry_SYSCALL_64_after_hwframe+0x63/0xcdvalue changed: 0x0000000000000000 -> 0xffffea0004a1d288Reported by Kernel Concurrency Sanitizer on:CPU: 1 PID: 18611 Comm: syz-executor.4 Not tainted 6.0.0-rc2-syzkaller-00248-ge022620b5d05-dirty #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
openEuler评分:
7.0
Vector:CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
受影响版本排查(受影响/不受影响):
1.openEuler-22.03-LTS-SP1(5.10.0):受影响
2.openEuler-22.03-LTS-SP3(5.10.0):受影响
3.openEuler-20.03-LTS-SP4(4.19.90):不受影响
4.openEuler-22.03-LTS-SP4(5.10.0):不受影响
5.master(6.1.0):不受影响
6.openEuler-22.03-LTS-Next(5.10.0):不受影响
7.openEuler-24.03-LTS(6.6.0):不受影响
8.openEuler-24.03-LTS-Next(6.6.0):不受影响
修复是否涉及abi变化(是/否):
1.openEuler-20.03-LTS-SP4(4.19.90):否
2.openEuler-22.03-LTS-SP1(5.10.0):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.master(6.1.0):否
5.openEuler-22.03-LTS-Next(5.10.0):否
6.openEuler-24.03-LTS(6.6.0):否
7.openEuler-24.03-LTS-Next(6.6.0):否
8.openEuler-22.03-LTS-SP4(5.10.0):否
三、漏洞修复
安全公告链接:https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-1694
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issue处理注意事项:
1. 当前issue受影响的分支提交pr时, 须在pr描述中填写当前issue编号进行关联, 否则无法关闭当前issue;
2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容,未引入的分支不需要填写, 否则无法关闭当前issue;
3. 以下为模板中需要填写完整的内容, 请复制到评论区回复, 注: 内容的标题名称(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否))不能省略,省略后cve-manager将无法正常解析填写内容.
影响性分析说明:
openEuler评分: (评分和向量)
受影响版本排查(受影响/不受影响):
1.master(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):
9.openEuler-24.03-LTS:
10.openEuler-24.03-LTS-Next:
修复是否涉及abi变化(是/否):
1.master(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):
9.openEuler-24.03-LTS:
10.openEuler-24.03-LTS-Next:
issue处理具体操作请参考:
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://gitee.com/help/articles/4142
参考网址 | 关联pr | 状态 | 补丁链接 |
---|---|---|---|
https://nvd.nist.gov/vuln/detail/CVE-2022-48689 | None | None | https://git.kernel.org/stable/c/3261400639463a853ba2b3be8bd009c2a8089775 https://git.kernel.org/stable/c/8527c9a6bf8e54fef0a8d3d7d8874a48c725c915 https://git.kernel.org/stable/c/6730c48ed6b0cd939fc9b30b2d621ce0b89bea83 |
https://ubuntu.com/security/CVE-2022-48689 | None | None | https://discourse.ubuntu.com/c/ubuntu-pro |
https://www.opencve.io/cve/CVE-2022-48689 | None | None | https://git.kernel.org/stable/c/3261400639463a853ba2b3be8bd009c2a8089775 https://git.kernel.org/stable/c/8527c9a6bf8e54fef0a8d3d7d8874a48c725c915 https://git.kernel.org/stable/c/6730c48ed6b0cd939fc9b30b2d621ce0b89bea83 |
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2022-48689 | |||
https://security-tracker.debian.org/tracker/CVE-2022-48689 |
说明:补丁链接仅供初步排查参考,实际可用性请人工再次确认,补丁下载验证可使用CVE补丁工具。
若补丁不准确,烦请在此issue下评论 '/report-patch 参考网址 补丁链接1,补丁链接2' 反馈正确信息,便于我们不断优化工具,不胜感激。
如 /report-patch https://security-tracker.debian.org/tracker/CVE-2021-3997 https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1
@guo-mengqi 请确认分支: master,openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-Next,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2,openEuler-22.03-LTS-SP3,openEuler-24.03-LTS,openEuler-24.03-LTS-Next 受影响/不受影响.
请确认分支信息是否填写完整,否则将无法关闭当前issue.
@ci-robot 请确认分支: master,openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-Next,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2,openEuler-22.03-LTS-SP3,openEuler-24.03-LTS,openEuler-24.03-LTS-Next 受影响/不受影响.
请确认分支信息是否填写完整,否则将无法关闭当前issue.
@zhangjialin11 请确认分支: master,openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-Next,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2,openEuler-22.03-LTS-SP3,openEuler-24.03-LTS,openEuler-24.03-LTS-Next 受影响/不受影响.
请确认分支信息是否填写完整,否则将无法关闭当前issue.
@zhangjialin11 请确认分支: master,openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-Next,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2,openEuler-22.03-LTS-SP3,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS,openEuler-24.03-LTS-Next 受影响/不受影响.
请确认分支信息是否填写完整,否则将无法关闭当前issue.
CVE-2022-48689
影响性分析说明:
In the Linux kernel, the following vulnerability has been resolved:
tcp: TX zerocopy should not sense pfmemalloc status
We got a recent syzbot report [1] showing a possible misuse
of pfmemalloc page status in TCP zerocopy paths.
Indeed, for pages coming from user space or other layers,
using page_is_pfmemalloc() is moot, and possibly could give
false positives.
There has been attempts to make page_is_pfmemalloc() more robust,
but not using it in the first place in this context is probably better,
removing cpu cycles.
Note to stable teams :
You need to backport 84ce071e38a6 ("net: introduce
__skb_fill_page_desc_noacc") as a prereq.
Race is more probable after commit c07aea3ef4d4
("mm: add a signature in struct page") because page_is_pfmemalloc()
is now using low order bit from page->lru.next, which can change
more often than page->index.
Low order bit should never be set for lru.next (when used as an anchor
in LRU list), so KCSAN report is mostly a false positive.
Backporting to older kernel versions seems not necessary.
[1]
BUG: KCSAN: data-race in lru_add_fn / tcp_build_frag
write to 0xffffea0004a1d2c8 of 8 bytes by task 18600 on cpu 0:
__list_add include/linux/list.h:73 [inline]
list_add include/linux/list.h:88 [inline]
lruvec_add_folio include/linux/mm_inline.h:105 [inline]
lru_add_fn+0x440/0x520 mm/swap.c:228
folio_batch_move_lru+0x1e1/0x2a0 mm/swap.c:246
folio_batch_add_and_move mm/swap.c:263 [inline]
folio_add_lru+0xf1/0x140 mm/swap.c:490
filemap_add_folio+0xf8/0x150 mm/filemap.c:948
__filemap_get_folio+0x510/0x6d0 mm/filemap.c:1981
pagecache_get_page+0x26/0x190 mm/folio-compat.c:104
grab_cache_page_write_begin+0x2a/0x30 mm/folio-compat.c:116
ext4_da_write_begin+0x2dd/0x5f0 fs/ext4/inode.c:2988
generic_perform_write+0x1d4/0x3f0 mm/filemap.c:3738
ext4_buffered_write_iter+0x235/0x3e0 fs/ext4/file.c:270
ext4_file_write_iter+0x2e3/0x1210
call_write_iter include/linux/fs.h:2187 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x468/0x760 fs/read_write.c:578
ksys_write+0xe8/0x1a0 fs/read_write.c:631
__do_sys_write fs/read_write.c:643 [inline]
__se_sys_write fs/read_write.c:640 [inline]
__x64_sys_write+0x3e/0x50 fs/read_write.c:640
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
read to 0xffffea0004a1d2c8 of 8 bytes by task 18611 on cpu 1:
page_is_pfmemalloc include/linux/mm.h:1740 [inline]
__skb_fill_page_desc include/linux/skbuff.h:2422 [inline]
skb_fill_page_desc include/linux/skbuff.h:2443 [inline]
tcp_build_frag+0x613/0xb20 net/ipv4/tcp.c:1018
do_tcp_sendpages+0x3e8/0xaf0 net/ipv4/tcp.c:1075
tcp_sendpage_locked net/ipv4/tcp.c:1140 [inline]
tcp_sendpage+0x89/0xb0 net/ipv4/tcp.c:1150
inet_sendpage+0x7f/0xc0 net/ipv4/af_inet.c:833
kernel_sendpage+0x184/0x300 net/socket.c:3561
sock_sendpage+0x5a/0x70 net/socket.c:1054
pipe_to_sendpage+0x128/0x160 fs/splice.c:361
splice_from_pipe_feed fs/splice.c:415 [inline]
__splice_from_pipe+0x222/0x4d0 fs/splice.c:559
splice_from_pipe fs/splice.c:594 [inline]
generic_splice_sendpage+0x89/0xc0 fs/splice.c:743
do_splice_from fs/splice.c:764 [inline]
direct_splice_actor+0x80/0xa0 fs/splice.c:931
splice_direct_to_actor+0x305/0x620 fs/splice.c:886
do_splice_direct+0xfb/0x180 fs/splice.c:974
do_sendfile+0x3bf/0x910 fs/read_write.c:1249
__do_sys_sendfile64 fs/read_write.c:1317 [inline]
__se_sys_sendfile64 fs/read_write.c:1303 [inline]
__x64_sys_sendfile64+0x10c/0x150 fs/read_write.c:1303
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
value changed: 0x0000000000000000 -> 0xffffea0004a1d288
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 18611 Comm: syz-executor.4 Not tainted 6.0.0-rc2-syzkaller-00248-ge022620b5d05-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
openEuler评分:(评分和向量)
7.0
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP4:不受影响
2.openEuler-22.03-LTS-SP1:受影响
3.openEuler-22.03-LTS-SP3:受影响
4.openEuler-22.03-LTS-SP4:不受影响
5.master(6.1.0):不受影响
6.openEuler-22.03-LTS-Next:不受影响
7.openEuler-24.03-LTS:不受影响
8.openEuler-24.03-LTS-Next:不受影响
修复是否涉及abi变化(是/否):
1.openEuler-20.03-LTS-SP4:否
2.openEuler-22.03-LTS-SP1:否
3.openEuler-22.03-LTS-SP3:否
4.master(6.1.0):否
5.openEuler-22.03-LTS-Next:否
6.openEuler-24.03-LTS:否
7.openEuler-24.03-LTS-Next:否
8.openEuler-22.03-LTS-SP4:否
===========================================================
@gatieme ,@xiexiuqi ,@yangyingliang ,@pi3orama ,@jiaoff ,@guo-mengqi
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #I9LK5X
受影响分支: openEuler-22.03-LTS-SP1
具体操作参考: https://gitee.com/help/articles/4142
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