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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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45c180bc29
struct xfrm_userpolicy_type has two holes, so we should not
use C99 style initializer.
KMSAN report:
BUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:140 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x1b14/0x2800 lib/iov_iter.c:571
CPU: 1 PID: 4520 Comm: syz-executor841 Not tainted 4.17.0+ #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x185/0x1d0 lib/dump_stack.c:113
kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1117
kmsan_internal_check_memory+0x138/0x1f0 mm/kmsan/kmsan.c:1211
kmsan_copy_to_user+0x7a/0x160 mm/kmsan/kmsan.c:1253
copyout lib/iov_iter.c:140 [inline]
_copy_to_iter+0x1b14/0x2800 lib/iov_iter.c:571
copy_to_iter include/linux/uio.h:106 [inline]
skb_copy_datagram_iter+0x422/0xfa0 net/core/datagram.c:431
skb_copy_datagram_msg include/linux/skbuff.h:3268 [inline]
netlink_recvmsg+0x6f1/0x1900 net/netlink/af_netlink.c:1959
sock_recvmsg_nosec net/socket.c:802 [inline]
sock_recvmsg+0x1d6/0x230 net/socket.c:809
___sys_recvmsg+0x3fe/0x810 net/socket.c:2279
__sys_recvmmsg+0x58e/0xe30 net/socket.c:2391
do_sys_recvmmsg+0x2a6/0x3e0 net/socket.c:2472
__do_sys_recvmmsg net/socket.c:2485 [inline]
__se_sys_recvmmsg net/socket.c:2481 [inline]
__x64_sys_recvmmsg+0x15d/0x1c0 net/socket.c:2481
do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x446ce9
RSP: 002b:00007fc307918db8 EFLAGS: 00000293 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 0000000000446ce9
RDX: 000000000000000a RSI: 0000000020005040 RDI: 0000000000000003
RBP: 00000000006dbc20 R08: 0000000020004e40 R09: 0000000000000000
R10: 0000000040000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007ffc8d2df32f R14: 00007fc3079199c0 R15: 0000000000000001
Uninit was stored to memory at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline]
kmsan_save_stack mm/kmsan/kmsan.c:294 [inline]
kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685
kmsan_memcpy_origins+0x11d/0x170 mm/kmsan/kmsan.c:527
__msan_memcpy+0x109/0x160 mm/kmsan/kmsan_instr.c:413
__nla_put lib/nlattr.c:569 [inline]
nla_put+0x276/0x340 lib/nlattr.c:627
copy_to_user_policy_type net/xfrm/xfrm_user.c:1678 [inline]
dump_one_policy+0xbe1/0x1090 net/xfrm/xfrm_user.c:1708
xfrm_policy_walk+0x45a/0xd00 net/xfrm/xfrm_policy.c:1013
xfrm_dump_policy+0x1c0/0x2a0 net/xfrm/xfrm_user.c:1749
netlink_dump+0x9b5/0x1550 net/netlink/af_netlink.c:2226
__netlink_dump_start+0x1131/0x1270 net/netlink/af_netlink.c:2323
netlink_dump_start include/linux/netlink.h:214 [inline]
xfrm_user_rcv_msg+0x8a3/0x9b0 net/xfrm/xfrm_user.c:2577
netlink_rcv_skb+0x37e/0x600 net/netlink/af_netlink.c:2448
xfrm_netlink_rcv+0xb2/0xf0 net/xfrm/xfrm_user.c:2598
netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
netlink_unicast+0x1680/0x1750 net/netlink/af_netlink.c:1336
netlink_sendmsg+0x104f/0x1350 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:629 [inline]
sock_sendmsg net/socket.c:639 [inline]
___sys_sendmsg+0xec8/0x1320 net/socket.c:2117
__sys_sendmsg net/socket.c:2155 [inline]
__do_sys_sendmsg net/socket.c:2164 [inline]
__se_sys_sendmsg net/socket.c:2162 [inline]
__x64_sys_sendmsg+0x331/0x460 net/socket.c:2162
do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Local variable description: ----upt.i@dump_one_policy
Variable was created at:
dump_one_policy+0x78/0x1090 net/xfrm/xfrm_user.c:1689
xfrm_policy_walk+0x45a/0xd00 net/xfrm/xfrm_policy.c:1013
Byte 130 of 137 is uninitialized
Memory access starts at ffff88019550407f
Fixes:
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|---|---|---|
| .. | ||
| 6lowpan | ||
| 9p | ||
| 802 | ||
| 8021q | ||
| appletalk | ||
| atm | ||
| ax25 | ||
| batman-adv | ||
| bluetooth | ||
| bpf | ||
| bpfilter | ||
| bridge | ||
| caif | ||
| can | ||
| ceph | ||
| core | ||
| dcb | ||
| dccp | ||
| decnet | ||
| dns_resolver | ||
| dsa | ||
| ethernet | ||
| hsr | ||
| ieee802154 | ||
| ife | ||
| ipv4 | ||
| ipv6 | ||
| iucv | ||
| kcm | ||
| key | ||
| l2tp | ||
| l3mdev | ||
| lapb | ||
| llc | ||
| mac80211 | ||
| mac802154 | ||
| mpls | ||
| ncsi | ||
| netfilter | ||
| netlabel | ||
| netlink | ||
| netrom | ||
| nfc | ||
| nsh | ||
| openvswitch | ||
| packet | ||
| phonet | ||
| psample | ||
| qrtr | ||
| rds | ||
| rfkill | ||
| rose | ||
| rxrpc | ||
| sched | ||
| sctp | ||
| smc | ||
| strparser | ||
| sunrpc | ||
| switchdev | ||
| tipc | ||
| tls | ||
| unix | ||
| vmw_vsock | ||
| wimax | ||
| wireless | ||
| x25 | ||
| xdp | ||
| xfrm | ||
| compat.c | ||
| Kconfig | ||
| Makefile | ||
| socket.c | ||
| sysctl_net.c | ||