==================================================================
BUG: KASAN: stack-out-of-bounds in jhash2 include/linux/jhash.h:138 [inline]
BUG: KASAN: stack-out-of-bounds in __xfrm6_addr_hash net/xfrm/xfrm_hash.h:16 [inline]
BUG: KASAN: stack-out-of-bounds in __xfrm6_daddr_saddr_hash net/xfrm/xfrm_hash.h:29 [inline]
BUG: KASAN: stack-out-of-bounds in __xfrm_dst_hash+0x399/0x480 net/xfrm/xfrm_hash.h:95
Read of size 4 at addr ffffc90000007b38 by task swapper/0/0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
<IRQ>
__dump_stack+0x21/0x30 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:427 [inline]
kasan_report+0xf1/0x140 mm/kasan/report.c:444
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
jhash2 include/linux/jhash.h:138 [inline]
__xfrm6_addr_hash net/xfrm/xfrm_hash.h:16 [inline]
__xfrm6_daddr_saddr_hash net/xfrm/xfrm_hash.h:29 [inline]
__xfrm_dst_hash+0x399/0x480 net/xfrm/xfrm_hash.h:95
xfrm_dst_hash net/xfrm/xfrm_state.c:63 [inline]
xfrm_state_find+0x28a/0x2a10 net/xfrm/xfrm_state.c:1092
xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2396 [inline]
xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2441 [inline]
xfrm_resolve_and_create_bundle+0x697/0x29f0 net/xfrm/xfrm_policy.c:2734
xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2969 [inline]
xfrm_lookup_with_ifid+0x4e9/0x2080 net/xfrm/xfrm_policy.c:3100
xfrm_lookup net/xfrm/xfrm_policy.c:3197 [inline]
xfrm_lookup_route+0x3c/0x170 net/xfrm/xfrm_policy.c:3208
ip_route_output_flow+0x1f8/0x2f0 net/ipv4/route.c:2905
ip_route_output_ports include/net/route.h:169 [inline]
igmpv3_newpack+0x280/0xcd0 net/ipv4/igmp.c:372
add_grec+0x99b/0x1410 net/ipv4/igmp.c:537
igmpv3_send_cr net/ipv4/igmp.c:670 [inline]
igmp_ifc_timer_expire+0x104/0xf80 net/ipv4/igmp.c:813
call_timer_fn+0x38/0x290 kernel/time/timer.c:1459
expire_timers kernel/time/timer.c:1504 [inline]
__run_timers+0x650/0x9e0 kernel/time/timer.c:1775
run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1788
handle_softirqs+0x250/0x560 kernel/softirq.c:583
__do_softirq kernel/softirq.c:621 [inline]
invoke_softirq kernel/softirq.c:443 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:670
irq_exit_rcu+0x9/0x10 kernel/softirq.c:682
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:default_idle+0xf/0x20 arch/x86/kernel/process.c:730
Code: ff 4c 89 f7 e8 a2 a1 f4 fc e9 3d ff ff ff 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 55 48 89 e5 66 90 0f 00 2d e3 a1 50 00 fb f4 <5d> c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41
RSP: 0018:ffffffff86607d78 EFLAGS: 00000242
RAX: 0000000000003abc RBX: ffffffff8661c400 RCX: 0000000000003abc
RDX: 0000000000000001 RSI: ffffffff8563aba0 RDI: ffffffff8563ab60
RBP: ffffffff86607d78 R08: ffff8881f7038c73 R09: 1ffff1103ee0718e
R10: dffffc0000000000 R11: ffffed103ee0718f R12: 0000000000000000
R13: 1ffffffff0cc3880 R14: dffffc0000000000 R15: dffffc0000000000
arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:721
default_idle_call+0x71/0x1d0 kernel/sched/idle.c:112
cpuidle_idle_call kernel/sched/idle.c:202 [inline]
do_idle+0x368/0x620 kernel/sched/idle.c:326
cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:424
rest_init+0x10a/0x130 init/main.c:756
arch_call_rest_init+0xe/0x10 init/main.c:908
start_kernel+0x46d/0x4e0 init/main.c:1156
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:527
x86_64_start_kernel+0x5b/0x60 arch/x86/kernel/head64.c:508
secondary_startup_64_no_verify+0xb1/0xbb
</TASK>
Memory state around the buggy address:
ffffc90000007a00: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90000007a80: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
>ffffc90000007b00: 00 00 00 00 00 00 00 f3 f3 f3 f3 f3 00 00 00 00
^
ffffc90000007b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90000007c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: ff 4c 89 f7 decl -0x9(%rcx,%rcx,4)
4: e8 a2 a1 f4 fc call 0xfcf4a1ab
9: e9 3d ff ff ff jmp 0xffffff4b
e: 00 00 add %al,(%rax)
10: cc int3
11: cc int3
12: 00 00 add %al,(%rax)
14: cc int3
15: cc int3
16: 00 00 add %al,(%rax)
18: cc int3
19: cc int3
1a: 00 55 48 add %dl,0x48(%rbp)
1d: 89 e5 mov %esp,%ebp
1f: 66 90 xchg %ax,%ax
21: 0f 00 2d e3 a1 50 00 verw 0x50a1e3(%rip) # 0x50a20b
28: fb sti
29: f4 hlt
* 2a: 5d pop %rbp <-- trapping instruction
2b: c3 ret
2c: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
33: 00 00 00
36: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
3b: 55 push %rbp
3c: 48 89 e5 mov %rsp,%rbp
3f: 41 rex.B