KASAN: global-out-of-bounds Read in get_unique

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	KASAN: global-out-of-bounds Read in get_unique_tuple	C		done	5	1298d	1470d	1/1	fixed on 2020/10/30 09:40

linux-4.14

KASAN: global-out-of-bounds Read in get_unique_tuple

done

1298d

1470d

1/1

fixed on 2020/10/30 09:40


Created	Duration	User	Repo	Result
2020/10/25 22:00	3h05m	bisect fix	linux-4.19.y	job log (1)
2020/09/25 21:34	25m	bisect fix	linux-4.19.y	job log (0) log
2020/08/26 21:06	28m	bisect fix	linux-4.19.y	job log (0) log
2020/07/27 20:37	28m	bisect fix	linux-4.19.y	job log (0) log
2020/06/27 20:05	23m	bisect fix	linux-4.19.y	job log (0) log
2020/05/28 14:13	24m	bisect fix	linux-4.19.y	job log (0) log
2020/04/28 12:59	26m	bisect fix	linux-4.19.y	job log (0) log
2020/03/29 12:25	24m	bisect fix	linux-4.19.y	job log (0) log
2020/02/28 11:58	26m	bisect fix	linux-4.19.y	job log (0) log

audit: type=1400 audit(1580297500.381:36): avc: denied { map } for pid=8161 comm="syz-executor175" path="/root/syz-executor175804167" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 ================================================================== BUG: KASAN: global-out-of-bounds in __read_once_size include/linux/compiler.h:193 [inline] BUG: KASAN: global-out-of-bounds in __nf_nat_l4proto_find net/netfilter/nf_nat_core.c:73 [inline] BUG: KASAN: global-out-of-bounds in get_unique_tuple+0x1a23/0x1d40 net/netfilter/nf_nat_core.c:336 Read of size 8 at addr ffffffff884fc480 by task syz-executor175/8161 CPU: 1 PID: 8161 Comm: syz-executor175 Not tainted 4.19.99-syzkaller #0 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+0x197/0x210 lib/dump_stack.c:118 print_address_description.cold+0x5/0x20d mm/kasan/report.c:256 audit: type=1400 audit(1580297500.381:37): avc: denied { create } for pid=8161 comm="syz-executor175" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 audit: type=1400 audit(1580297500.381:38): avc: denied { write } for pid=8161 comm="syz-executor175" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 __read_once_size include/linux/compiler.h:193 [inline] __nf_nat_l4proto_find net/netfilter/nf_nat_core.c:73 [inline] get_unique_tuple+0x1a23/0x1d40 net/netfilter/nf_nat_core.c:336 nf_nat_setup_info+0x212/0x9e0 net/netfilter/nf_nat_core.c:431 __nf_nat_alloc_null_binding+0x164/0x1d0 net/netfilter/nf_nat_core.c:490 nfnetlink_parse_nat_setup+0x3ca/0x450 net/netfilter/nf_nat_core.c:882 ctnetlink_parse_nat_setup+0xc5/0x660 net/netfilter/nf_conntrack_netlink.c:1521 ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1591 [inline] ctnetlink_create_conntrack+0x4ea/0x1300 net/netfilter/nf_conntrack_netlink.c:1984 ctnetlink_new_conntrack+0x527/0xe50 net/netfilter/nf_conntrack_netlink.c:2114 nfnetlink_rcv_msg+0xd0d/0xfcf net/netfilter/nfnetlink.c:228 netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454 nfnetlink_rcv+0x1c0/0x460 net/netfilter/nfnetlink.c:560 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x53a/0x730 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 ___sys_sendmsg+0x803/0x920 net/socket.c:2115 __sys_sendmsg+0x105/0x1d0 net/socket.c:2153 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2160 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440229 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe7ea27a68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440229 RDX: 0000000000000000 RSI: 0000000020000640 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ab0 R13: 0000000000401b40 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the variable: nft_rt_policy+0x1a0/0x1e0 Memory state around the buggy address: ffffffff884fc380: 00 00 00 00 fa fa fa fa 00 00 00 00 fa fa fa fa ffffffff884fc400: 00 00 00 00 fa fa fa fa 00 00 00 00 fa fa fa fa >ffffffff884fc480: 07 fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 ^ ffffffff884fc500: 00 00 00 00 00 fa fa fa fa fa fa fa 00 00 00 00 ffffffff884fc580: 00 00 00 00 00 00 00 00 00 fa fa fa fa fa fa fa ==================================================================