* [syzbot] [net?] KMSAN: kernel-infoleak in __skb_datagram_iter (4)
@ 2024-05-24 12:51 syzbot
2024-11-06 17:58 ` syzbot
0 siblings, 1 reply; 4+ messages in thread
From: syzbot @ 2024-05-24 12:51 UTC (permalink / raw)
To: davem, edumazet, kuba, linux-kernel, netdev, pabeni,
syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 101b7a97143a Merge tag 'acpi-6.10-rc1' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15633df4980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7ac2f8c387a23814
dashboard link: https://syzkaller.appspot.com/bug?extid=0c85cae3350b7d486aee
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4f673334a91c/disk-101b7a97.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8e6db59f4091/vmlinux-101b7a97.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7e5782387c9d/bzImage-101b7a97.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0c85cae3350b7d486aee@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]
BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline]
BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:29 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:271 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x366/0x24b0 lib/iov_iter.c:185
instrument_copy_to_user include/linux/instrumented.h:114 [inline]
copy_to_user_iter lib/iov_iter.c:24 [inline]
iterate_ubuf include/linux/iov_iter.h:29 [inline]
iterate_and_advance2 include/linux/iov_iter.h:245 [inline]
iterate_and_advance include/linux/iov_iter.h:271 [inline]
_copy_to_iter+0x366/0x24b0 lib/iov_iter.c:185
copy_to_iter include/linux/uio.h:196 [inline]
simple_copy_to_iter net/core/datagram.c:532 [inline]
__skb_datagram_iter+0x185/0x1000 net/core/datagram.c:420
skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546
skb_copy_datagram_msg include/linux/skbuff.h:4070 [inline]
netlink_recvmsg+0x432/0x1610 net/netlink/af_netlink.c:1962
sock_recvmsg_nosec net/socket.c:1046 [inline]
sock_recvmsg+0x2c4/0x340 net/socket.c:1068
____sys_recvmsg+0x18a/0x620 net/socket.c:2803
___sys_recvmsg+0x223/0x840 net/socket.c:2845
__sys_recvmsg net/socket.c:2875 [inline]
__do_sys_recvmsg net/socket.c:2885 [inline]
__se_sys_recvmsg net/socket.c:2882 [inline]
__x64_sys_recvmsg+0x304/0x4a0 net/socket.c:2882
x64_sys_call+0x38ff/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:48
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
pskb_expand_head+0x30f/0x19d0 net/core/skbuff.c:2271
netlink_trim+0x2c2/0x330 net/netlink/af_netlink.c:1317
netlink_broadcast_filtered+0x82/0x23b0 net/netlink/af_netlink.c:1523
nlmsg_multicast_filtered include/net/netlink.h:1111 [inline]
nlmsg_multicast include/net/netlink.h:1130 [inline]
nlmsg_notify+0x15f/0x2f0 net/netlink/af_netlink.c:2602
rtnl_notify+0xc3/0xf0 net/core/rtnetlink.c:757
wireless_nlevent_flush net/wireless/wext-core.c:354 [inline]
wireless_nlevent_process+0xfe/0x250 net/wireless/wext-core.c:414
process_one_work kernel/workqueue.c:3267 [inline]
process_scheduled_works+0xa81/0x1bd0 kernel/workqueue.c:3348
worker_thread+0xea5/0x1560 kernel/workqueue.c:3429
kthread+0x3e2/0x540 kernel/kthread.c:389
ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Uninit was stored to memory at:
wireless_send_event+0x566/0x1020 net/wireless/wext-core.c:580
ioctl_standard_iw_point+0x12e5/0x13c0
compat_standard_call+0x179/0x310 net/wireless/wext-core.c:1110
wext_ioctl_dispatch+0x234/0xa30 net/wireless/wext-core.c:1016
compat_wext_handle_ioctl+0x1ae/0x2f0 net/wireless/wext-core.c:1139
compat_sock_ioctl+0x26b/0x1370 net/socket.c:3525
__do_compat_sys_ioctl fs/ioctl.c:1004 [inline]
__se_compat_sys_ioctl+0x791/0x1090 fs/ioctl.c:947
__ia32_compat_sys_ioctl+0x93/0xe0 fs/ioctl.c:947
ia32_sys_call+0x1481/0x40a0 arch/x86/include/generated/asm/syscalls_32.h:55
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0xb4/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Local variable iwp created at:
compat_standard_call+0x48/0x310 net/wireless/wext-core.c:1097
wext_ioctl_dispatch+0x234/0xa30 net/wireless/wext-core.c:1016
Bytes 60-63 of 64 are uninitialized
Memory access of size 64 starts at ffff88804af03180
Data copied to user address 00007fff5690c968
CPU: 0 PID: 4697 Comm: dhcpcd Tainted: G W 6.9.0-syzkaller-02339-g101b7a97143a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
=====================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] [net?] KMSAN: kernel-infoleak in __skb_datagram_iter (4)
2024-05-24 12:51 [syzbot] [net?] KMSAN: kernel-infoleak in __skb_datagram_iter (4) syzbot
@ 2024-11-06 17:58 ` syzbot
2024-11-06 18:09 ` Eric Dumazet
0 siblings, 1 reply; 4+ messages in thread
From: syzbot @ 2024-11-06 17:58 UTC (permalink / raw)
To: davem, edumazet, horms, kuba, linux-kernel, netdev, pabeni,
syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: 2e1b3cc9d7f7 Merge tag 'arm-fixes-6.12-2' of git://git.ker..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1485dd5f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=6fdf74cce377223b
dashboard link: https://syzkaller.appspot.com/bug?extid=0c85cae3350b7d486aee
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1685dd5f980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10bfb6a7980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/08456e37db58/disk-2e1b3cc9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cc957f7ba80b/vmlinux-2e1b3cc9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7579fe72ed89/bzImage-2e1b3cc9.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0c85cae3350b7d486aee@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]
BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline]
BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:30 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:328 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x2f3/0x2b30 lib/iov_iter.c:185
instrument_copy_to_user include/linux/instrumented.h:114 [inline]
copy_to_user_iter lib/iov_iter.c:24 [inline]
iterate_ubuf include/linux/iov_iter.h:30 [inline]
iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
_copy_to_iter+0x2f3/0x2b30 lib/iov_iter.c:185
copy_to_iter include/linux/uio.h:211 [inline]
simple_copy_to_iter net/core/datagram.c:524 [inline]
__skb_datagram_iter+0x18d/0x1190 net/core/datagram.c:401
skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:538
skb_copy_datagram_msg include/linux/skbuff.h:4076 [inline]
netlink_recvmsg+0x432/0x1610 net/netlink/af_netlink.c:1958
sock_recvmsg_nosec net/socket.c:1051 [inline]
sock_recvmsg+0x2c4/0x340 net/socket.c:1073
sock_read_iter+0x32d/0x3c0 net/socket.c:1143
io_iter_do_read io_uring/rw.c:771 [inline]
__io_read+0x8d2/0x20f0 io_uring/rw.c:865
io_read+0x3e/0xf0 io_uring/rw.c:943
io_issue_sqe+0x429/0x22c0 io_uring/io_uring.c:1739
io_queue_sqe io_uring/io_uring.c:1953 [inline]
io_req_task_submit+0x104/0x1e0 io_uring/io_uring.c:1373
io_poll_task_func+0x12e5/0x1620
io_handle_tw_list+0x23a/0x5c0 io_uring/io_uring.c:1063
tctx_task_work_run+0xf8/0x3d0 io_uring/io_uring.c:1135
tctx_task_work+0x6d/0xc0 io_uring/io_uring.c:1153
task_work_run+0x268/0x310 kernel/task_work.c:239
ptrace_notify+0x304/0x320 kernel/signal.c:2403
ptrace_report_syscall include/linux/ptrace.h:415 [inline]
ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline]
syscall_exit_work+0x14e/0x3e0 kernel/entry/common.c:173
syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]
syscall_exit_to_user_mode+0x13b/0x170 kernel/entry/common.c:218
do_syscall_64+0xda/0x1e0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
pskb_expand_head+0x305/0x1a60 net/core/skbuff.c:2283
netlink_trim+0x2c2/0x330 net/netlink/af_netlink.c:1313
netlink_unicast+0x9f/0x1260 net/netlink/af_netlink.c:1347
nlmsg_unicast include/net/netlink.h:1158 [inline]
nlmsg_notify+0x21d/0x2f0 net/netlink/af_netlink.c:2602
rtnetlink_send+0x73/0x90 net/core/rtnetlink.c:770
rtnetlink_maybe_send include/linux/rtnetlink.h:18 [inline]
tcf_add_notify net/sched/act_api.c:2068 [inline]
tcf_action_add net/sched/act_api.c:2091 [inline]
tc_ctl_action+0x146e/0x19d0 net/sched/act_api.c:2139
rtnetlink_rcv_msg+0x12fc/0x1410 net/core/rtnetlink.c:6675
netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2551
rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6693
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x30f/0x380 net/socket.c:744
____sys_sendmsg+0x877/0xb60 net/socket.c:2607
___sys_sendmsg+0x28d/0x3c0 net/socket.c:2661
__sys_sendmsg net/socket.c:2690 [inline]
__do_sys_sendmsg net/socket.c:2699 [inline]
__se_sys_sendmsg net/socket.c:2697 [inline]
__x64_sys_sendmsg+0x300/0x4a0 net/socket.c:2697
x64_sys_call+0x2da0/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:47
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
__nla_put lib/nlattr.c:1041 [inline]
nla_put+0x1c6/0x230 lib/nlattr.c:1099
tcf_ife_dump+0x250/0x10b0 net/sched/act_ife.c:660
tcf_action_dump_old net/sched/act_api.c:1190 [inline]
tcf_action_dump_1+0x85e/0x970 net/sched/act_api.c:1226
tcf_action_dump+0x1fd/0x460 net/sched/act_api.c:1250
tca_get_fill+0x519/0x7a0 net/sched/act_api.c:1648
tcf_add_notify_msg net/sched/act_api.c:2043 [inline]
tcf_add_notify net/sched/act_api.c:2062 [inline]
tcf_action_add net/sched/act_api.c:2091 [inline]
tc_ctl_action+0x1365/0x19d0 net/sched/act_api.c:2139
rtnetlink_rcv_msg+0x12fc/0x1410 net/core/rtnetlink.c:6675
netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2551
rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6693
netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x30f/0x380 net/socket.c:744
____sys_sendmsg+0x877/0xb60 net/socket.c:2607
___sys_sendmsg+0x28d/0x3c0 net/socket.c:2661
__sys_sendmsg net/socket.c:2690 [inline]
__do_sys_sendmsg net/socket.c:2699 [inline]
__se_sys_sendmsg net/socket.c:2697 [inline]
__x64_sys_sendmsg+0x300/0x4a0 net/socket.c:2697
x64_sys_call+0x2da0/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:47
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Local variable opt created at:
tcf_ife_dump+0xab/0x10b0 net/sched/act_ife.c:647
tcf_action_dump_old net/sched/act_api.c:1190 [inline]
tcf_action_dump_1+0x85e/0x970 net/sched/act_api.c:1226
Bytes 158-159 of 216 are uninitialized
Memory access of size 216 starts at ffff88811980e280
CPU: 1 UID: 0 PID: 5791 Comm: syz-executor190 Not tainted 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
=====================================================
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] [net?] KMSAN: kernel-infoleak in __skb_datagram_iter (4)
2024-11-06 17:58 ` syzbot
@ 2024-11-06 18:09 ` Eric Dumazet
2024-11-06 22:19 ` syzbot
0 siblings, 1 reply; 4+ messages in thread
From: Eric Dumazet @ 2024-11-06 18:09 UTC (permalink / raw)
To: syzbot; +Cc: davem, horms, kuba, linux-kernel, netdev, pabeni, syzkaller-bugs
On Wed, Nov 6, 2024 at 6:58 PM syzbot
<syzbot+0c85cae3350b7d486aee@syzkaller.appspotmail.com> wrote:
>
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: 2e1b3cc9d7f7 Merge tag 'arm-fixes-6.12-2' of git://git.ker..
> git tree: upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=1485dd5f980000
> kernel config: https://syzkaller.appspot.com/x/.config?x=6fdf74cce377223b
> dashboard link: https://syzkaller.appspot.com/bug?extid=0c85cae3350b7d486aee
> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1685dd5f980000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10bfb6a7980000
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/08456e37db58/disk-2e1b3cc9.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/cc957f7ba80b/vmlinux-2e1b3cc9.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/7579fe72ed89/bzImage-2e1b3cc9.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+0c85cae3350b7d486aee@syzkaller.appspotmail.com
>
> =====================================================
> BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]
> BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline]
> BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:30 [inline]
> BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
> BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:328 [inline]
> BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x2f3/0x2b30 lib/iov_iter.c:185
> instrument_copy_to_user include/linux/instrumented.h:114 [inline]
> copy_to_user_iter lib/iov_iter.c:24 [inline]
> iterate_ubuf include/linux/iov_iter.h:30 [inline]
> iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
> iterate_and_advance include/linux/iov_iter.h:328 [inline]
> _copy_to_iter+0x2f3/0x2b30 lib/iov_iter.c:185
> copy_to_iter include/linux/uio.h:211 [inline]
> simple_copy_to_iter net/core/datagram.c:524 [inline]
> __skb_datagram_iter+0x18d/0x1190 net/core/datagram.c:401
> skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:538
> skb_copy_datagram_msg include/linux/skbuff.h:4076 [inline]
> netlink_recvmsg+0x432/0x1610 net/netlink/af_netlink.c:1958
> sock_recvmsg_nosec net/socket.c:1051 [inline]
> sock_recvmsg+0x2c4/0x340 net/socket.c:1073
> sock_read_iter+0x32d/0x3c0 net/socket.c:1143
> io_iter_do_read io_uring/rw.c:771 [inline]
> __io_read+0x8d2/0x20f0 io_uring/rw.c:865
> io_read+0x3e/0xf0 io_uring/rw.c:943
> io_issue_sqe+0x429/0x22c0 io_uring/io_uring.c:1739
> io_queue_sqe io_uring/io_uring.c:1953 [inline]
> io_req_task_submit+0x104/0x1e0 io_uring/io_uring.c:1373
> io_poll_task_func+0x12e5/0x1620
> io_handle_tw_list+0x23a/0x5c0 io_uring/io_uring.c:1063
> tctx_task_work_run+0xf8/0x3d0 io_uring/io_uring.c:1135
> tctx_task_work+0x6d/0xc0 io_uring/io_uring.c:1153
> task_work_run+0x268/0x310 kernel/task_work.c:239
> ptrace_notify+0x304/0x320 kernel/signal.c:2403
> ptrace_report_syscall include/linux/ptrace.h:415 [inline]
> ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline]
> syscall_exit_work+0x14e/0x3e0 kernel/entry/common.c:173
> syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]
> __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]
> syscall_exit_to_user_mode+0x13b/0x170 kernel/entry/common.c:218
> do_syscall_64+0xda/0x1e0 arch/x86/entry/common.c:89
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Uninit was stored to memory at:
> pskb_expand_head+0x305/0x1a60 net/core/skbuff.c:2283
> netlink_trim+0x2c2/0x330 net/netlink/af_netlink.c:1313
> netlink_unicast+0x9f/0x1260 net/netlink/af_netlink.c:1347
> nlmsg_unicast include/net/netlink.h:1158 [inline]
> nlmsg_notify+0x21d/0x2f0 net/netlink/af_netlink.c:2602
> rtnetlink_send+0x73/0x90 net/core/rtnetlink.c:770
> rtnetlink_maybe_send include/linux/rtnetlink.h:18 [inline]
> tcf_add_notify net/sched/act_api.c:2068 [inline]
> tcf_action_add net/sched/act_api.c:2091 [inline]
> tc_ctl_action+0x146e/0x19d0 net/sched/act_api.c:2139
> rtnetlink_rcv_msg+0x12fc/0x1410 net/core/rtnetlink.c:6675
> netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2551
> rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6693
> netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
> netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1357
> netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1901
> sock_sendmsg_nosec net/socket.c:729 [inline]
> __sock_sendmsg+0x30f/0x380 net/socket.c:744
> ____sys_sendmsg+0x877/0xb60 net/socket.c:2607
> ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2661
> __sys_sendmsg net/socket.c:2690 [inline]
> __do_sys_sendmsg net/socket.c:2699 [inline]
> __se_sys_sendmsg net/socket.c:2697 [inline]
> __x64_sys_sendmsg+0x300/0x4a0 net/socket.c:2697
> x64_sys_call+0x2da0/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:47
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Uninit was stored to memory at:
> __nla_put lib/nlattr.c:1041 [inline]
> nla_put+0x1c6/0x230 lib/nlattr.c:1099
> tcf_ife_dump+0x250/0x10b0 net/sched/act_ife.c:660
> tcf_action_dump_old net/sched/act_api.c:1190 [inline]
> tcf_action_dump_1+0x85e/0x970 net/sched/act_api.c:1226
> tcf_action_dump+0x1fd/0x460 net/sched/act_api.c:1250
> tca_get_fill+0x519/0x7a0 net/sched/act_api.c:1648
> tcf_add_notify_msg net/sched/act_api.c:2043 [inline]
> tcf_add_notify net/sched/act_api.c:2062 [inline]
> tcf_action_add net/sched/act_api.c:2091 [inline]
> tc_ctl_action+0x1365/0x19d0 net/sched/act_api.c:2139
> rtnetlink_rcv_msg+0x12fc/0x1410 net/core/rtnetlink.c:6675
> netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2551
> rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6693
> netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
> netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1357
> netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1901
> sock_sendmsg_nosec net/socket.c:729 [inline]
> __sock_sendmsg+0x30f/0x380 net/socket.c:744
> ____sys_sendmsg+0x877/0xb60 net/socket.c:2607
> ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2661
> __sys_sendmsg net/socket.c:2690 [inline]
> __do_sys_sendmsg net/socket.c:2699 [inline]
> __se_sys_sendmsg net/socket.c:2697 [inline]
> __x64_sys_sendmsg+0x300/0x4a0 net/socket.c:2697
> x64_sys_call+0x2da0/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:47
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Local variable opt created at:
> tcf_ife_dump+0xab/0x10b0 net/sched/act_ife.c:647
> tcf_action_dump_old net/sched/act_api.c:1190 [inline]
> tcf_action_dump_1+0x85e/0x970 net/sched/act_api.c:1226
>
> Bytes 158-159 of 216 are uninitialized
> Memory access of size 216 starts at ffff88811980e280
>
> CPU: 1 UID: 0 PID: 5791 Comm: syz-executor190 Not tainted 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> =====================================================
>
>
> ---
> If you want syzbot to run the reproducer, reply with:
> #syz test: git://repo/address.git branch-or-commit-hash
> If you attach or paste a git patch, syzbot will apply it before testing.
#syz test
diff --git a/include/uapi/linux/tc_act/tc_connmark.h
b/include/uapi/linux/tc_act/tc_connmark.h
index 9f8f6f709feb5cb67decc5fc80c422d9373df930..7089b9466065df074f98b47ffe179baf386600a9
100644
--- a/include/uapi/linux/tc_act/tc_connmark.h
+++ b/include/uapi/linux/tc_act/tc_connmark.h
@@ -8,6 +8,7 @@
struct tc_connmark {
tc_gen;
__u16 zone;
+ __u16 pad;
};
enum {
diff --git a/include/uapi/linux/tc_act/tc_ife.h
b/include/uapi/linux/tc_act/tc_ife.h
index 8c401f185675582febc262a8d11bf9598cb8a1f4..6f7f7af20fe9466631cc571f9c00665489cfe91d
100644
--- a/include/uapi/linux/tc_act/tc_ife.h
+++ b/include/uapi/linux/tc_act/tc_ife.h
@@ -13,6 +13,7 @@
struct tc_ife {
tc_gen;
__u16 flags;
+ __u16 pad;
};
/*XXX: We need to encode the total number of bytes consumed */
diff --git a/include/uapi/linux/tc_act/tc_pedit.h
b/include/uapi/linux/tc_act/tc_pedit.h
index f5cab7fc96ab1ea1516beeedff20b279c3cfa4d7..28e026dbc1400899a072fdbac6872654bea3ab8d
100644
--- a/include/uapi/linux/tc_act/tc_pedit.h
+++ b/include/uapi/linux/tc_act/tc_pedit.h
@@ -62,6 +62,7 @@ struct tc_pedit_sel {
tc_gen;
unsigned char nkeys;
unsigned char flags;
+ __u16 pad;
struct tc_pedit_key keys[] __counted_by(nkeys);
};
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] [net?] KMSAN: kernel-infoleak in __skb_datagram_iter (4)
2024-11-06 18:09 ` Eric Dumazet
@ 2024-11-06 22:19 ` syzbot
0 siblings, 0 replies; 4+ messages in thread
From: syzbot @ 2024-11-06 22:19 UTC (permalink / raw)
To: davem, edumazet, horms, kuba, linux-kernel, netdev, pabeni,
syzkaller-bugs
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
failed to apply patch:
checking file include/uapi/linux/tc_act/tc_connmark.h
patch: **** malformed patch at line 11: diff --git a/include/uapi/linux/tc_act/tc_ife.h
Tested on:
commit: f43b1569 Merge tag 'keys-next-6.12-rc7' of git://git.k..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=6fdf74cce377223b
dashboard link: https://syzkaller.appspot.com/bug?extid=0c85cae3350b7d486aee
compiler:
patch: https://syzkaller.appspot.com/x/patch.diff?x=14119f40580000
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-11-06 22:19 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-05-24 12:51 [syzbot] [net?] KMSAN: kernel-infoleak in __skb_datagram_iter (4) syzbot
2024-11-06 17:58 ` syzbot
2024-11-06 18:09 ` Eric Dumazet
2024-11-06 22:19 ` syzbot
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