==================================================================
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 ffffc900001d0af8 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__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+0x10f/0x150 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+0x291/0x2a10 net/xfrm/xfrm_state.c:1092
xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2387 [inline]
xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2432 [inline]
xfrm_resolve_and_create_bundle+0x6b7/0x2a20 net/xfrm/xfrm_policy.c:2725
xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2960 [inline]
xfrm_lookup_with_ifid+0x692/0x2050 net/xfrm/xfrm_policy.c:3091
xfrm_lookup net/xfrm/xfrm_policy.c:3188 [inline]
xfrm_lookup_route+0x3c/0x170 net/xfrm/xfrm_policy.c:3199
ip_route_output_flow+0x1f8/0x2f0 net/ipv4/route.c:2905
ip_route_output_ports include/net/route.h:163 [inline]
igmpv3_newpack+0x288/0xd00 net/ipv4/igmp.c:372
add_grhead+0x75/0x2e0 net/ipv4/igmp.c:443
add_grec+0x1168/0x1400 net/ipv4/igmp.c:577
igmpv3_send_cr net/ipv4/igmp.c:714 [inline]
igmp_ifc_timer_expire+0x85c/0xfc0 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+0x637/0x9a0 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
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: 8c 4b ff ff ff 4c 89 f7 e8 7e 5a f5 fc e9 3e ff ff ff 00 00 cc cc 00 00 cc cc 00 55 48 89 e5 66 90 0f 00 2d b3 92 51 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:ffffc90000157db8 EFLAGS: 00000256
RAX: 00000000000042f0 RBX: ffff888100308000 RCX: 00000000000042f0
RDX: 0000000000000001 RSI: ffffffff85638620 RDI: ffffffff856385e0
RBP: ffffc90000157db8 R08: ffff8881f7138c73 R09: 1ffff1103ee2718e
R10: dffffc0000000000 R11: ffffed103ee2718f R12: 0000000000000000
R13: 1ffff11020061000 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
start_secondary+0x2c8/0x380 arch/x86/kernel/smpboot.c:281
secondary_startup_64_no_verify+0xb1/0xbb
Memory state around the buggy address:
ffffc900001d0980: f8 f8 f8 f8 f8 f8 f3 f3 f3 f3 f3 f3 00 00 00 00
ffffc900001d0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900001d0a80: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 f3
^
ffffc900001d0b00: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900001d0b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess), 4 bytes skipped:
0: ff 4c 89 f7 decl -0x9(%rcx,%rcx,4)
4: e8 7e 5a f5 fc call 0xfcf55a87
9: e9 3e ff ff ff jmp 0xffffff4c
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 55 48 add %dl,0x48(%rbp)
19: 89 e5 mov %esp,%ebp
1b: 66 90 xchg %ax,%ax
1d: 0f 00 2d b3 92 51 00 verw 0x5192b3(%rip) # 0x5192d7
24: fb sti
25: f4 hlt
* 26: 5d pop %rbp <-- trapping instruction
27: c3 ret
28: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
2f: 00 00 00
32: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
37: 55 push %rbp
38: 48 89 e5 mov %rsp,%rbp
3b: 41 rex.B