UBSAN: shift-out-of-bounds in xfrm_selector

Title	Replies (including bot)	Last reply
[syzbot] UBSAN: shift-out-of-bounds in xfrm_selector_match	2 (3)	2021/06/15 05:51

Title

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Last reply

[syzbot] UBSAN: shift-out-of-bounds in xfrm_selector_match

2 (3)

2021/06/15 05:51

Kernel	Title	Rank 🛈	Repro	Cause bisect	Count	Last	Reported	Patched	Status
linux-6.6	UBSAN: shift-out-of-bounds in xfrm_selector_match	-1			1	2d05h	2d05h	0/2	upstream: reported on 2026/07/23 23:05
upstream	UBSAN: shift-out-of-bounds in xfrm_selector_match (3) prio:high net	-1			1	42d	40d	29/29	fixed on 2026/07/15 08:27
upstream	UBSAN: shift-out-of-bounds in xfrm_selector_match (2) net	-1	C	error	10	664d	677d	28/29	fixed on 2024/11/12 23:31

================================================================================ UBSAN: shift-out-of-bounds in ./include/net/xfrm.h:829:23 shift exponent -128 is negative CPU: 0 PID: 31981 Comm: syz-executor.5 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 ubsan_epilogue+0xb/0x5a lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:330 addr4_match include/net/xfrm.h:829 [inline] __xfrm4_selector_match net/xfrm/xfrm_policy.c:201 [inline] xfrm_selector_match.cold+0x18/0x3a net/xfrm/xfrm_policy.c:226 xfrm_state_look_at+0x16d/0x440 net/xfrm/xfrm_state.c:1046 xfrm_state_find+0x168e/0x4f00 net/xfrm/xfrm_state.c:1120 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2391 [inline] xfrm_tmpl_resolve+0x2f3/0xd40 net/xfrm/xfrm_policy.c:2436 xfrm_resolve_and_create_bundle+0x123/0x25a0 net/xfrm/xfrm_policy.c:2724 xfrm_lookup_with_ifid+0x22a/0x2220 net/xfrm/xfrm_policy.c:3058 xfrm_lookup net/xfrm/xfrm_policy.c:3187 [inline] xfrm_lookup_route+0x36/0x1e0 net/xfrm/xfrm_policy.c:3198 ip_route_output_flow+0x114/0x150 net/ipv4/route.c:2857 udp_sendmsg+0x1958/0x2740 net/ipv4/udp.c:1219 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x331/0x810 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 __sys_sendmmsg+0x195/0x470 net/socket.c:2549 __do_sys_sendmmsg net/socket.c:2578 [inline] __se_sys_sendmmsg net/socket.c:2575 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2575 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9f4bf3dae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9f49471188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f9f4c0510e0 RCX: 00007f9f4bf3dae9 RDX: 000000000800001d RSI: 0000000020007fc0 RDI: 0000000000000006 RBP: 00007f9f4bf97f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa9f4777f R14: 00007f9f49471300 R15: 0000000000022000 </TASK> ================================================================================

Crashes (4):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Manager	Title
2021/11/13 00:16	net-old	5833291ab6de	83f5c9b5	.config	console log	report	info	ci-upstream-net-this-kasan-gce	UBSAN: shift-out-of-bounds in xfrm_selector_match
2021/07/18 01:09	net-old	5b69874f74cc	f115ae98	.config	console log	report	info	ci-upstream-net-this-kasan-gce	UBSAN: shift-out-of-bounds in xfrm_selector_match
2021/06/10 18:02	net-old	13c62f5371e3	1ba81399	.config	console log	report	info	ci-upstream-net-this-kasan-gce	UBSAN: shift-out-of-bounds in xfrm_selector_match
2021/10/17 15:43	net-next-old	4e6e167bc049	0c5d9412	.config	console log	report	info	ci-upstream-net-kasan-gce	UBSAN: shift-out-of-bounds in xfrm_selector_match

Crashes (4):

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