================================================================== 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 ffffc90000007b18 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 08/14/2025 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:77 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0xe2/0x130 mm/kasan/report.c:452 __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+0x27e/0x2880 net/xfrm/xfrm_state.c:1068 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2398 [inline] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2443 [inline] xfrm_resolve_and_create_bundle+0x626/0x28d0 net/xfrm/xfrm_policy.c:2736 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2971 [inline] xfrm_lookup_with_ifid+0x6e5/0x1980 net/xfrm/xfrm_policy.c:3102 xfrm_lookup net/xfrm/xfrm_policy.c:3194 [inline] xfrm_lookup_route+0x3c/0x170 net/xfrm/xfrm_policy.c:3205 ip_route_output_flow+0x1d2/0x2d0 net/ipv4/route.c:2803 ip_route_output_ports include/net/route.h:169 [inline] igmpv3_newpack+0x264/0xc40 net/ipv4/igmp.c:372 add_grhead+0x75/0x2e0 net/ipv4/igmp.c:443 add_grec+0x116b/0x1410 net/ipv4/igmp.c:577 igmpv3_send_cr net/ipv4/igmp.c:714 [inline] igmp_ifc_timer_expire+0x89e/0xf80 net/ipv4/igmp.c:813 call_timer_fn+0x38/0x290 kernel/time/timer.c:1450 expire_timers kernel/time/timer.c:1495 [inline] __run_timers+0x639/0x9a0 kernel/time/timer.c:1789 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1802 __do_softirq+0x255/0x563 kernel/softirq.c:309 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:405 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:default_idle+0x12/0x20 arch/x86/kernel/process.c:718 Code: 48 8b 7c 24 10 e8 be 29 00 00 e9 71 ff ff ff e8 54 fe fa ff 00 00 cc cc 55 48 89 e5 0f 1f 44 00 00 0f 00 2d 80 13 4d 00 fb f4 <5d> c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 55 48 89 e5 41 57 41 56 RSP: 0018:ffffffff86207d58 EFLAGS: 00000246 RAX: ffff8881f7000000 RBX: ffffffff8621c040 RCX: 00000000000063ca RDX: 0000000000000001 RSI: ffffffff85202040 RDI: ffffffff85202000 RBP: ffffffff86207d58 R08: dffffc0000000000 R09: ffffed103ee0ae7b R10: ffffed103ee0ae7b R11: 1ffff1103ee0ae7a R12: 0000000000000000 R13: 1ffffffff0c43808 R14: 0000000000000000 R15: dffffc0000000000 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:709 default_idle_call+0x71/0x1d0 kernel/sched/idle.c:114 cpuidle_idle_call kernel/sched/idle.c:196 [inline] do_idle+0x1df/0x530 kernel/sched/idle.c:308 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:404 rest_init+0xe8/0xf0 init/main.c:714 arch_call_rest_init+0xe/0x10 init/main.c:839 start_kernel+0x42e/0x49c init/main.c:1041 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:519 x86_64_start_kernel+0x60/0x63 arch/x86/kernel/head64.c:500 secondary_startup_64_no_verify+0xad/0xbb Memory state around the buggy address: ffffc90000007a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90000007a80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 >ffffc90000007b00: 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 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: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi 5: e8 be 29 00 00 call 0x29c8 a: e9 71 ff ff ff jmp 0xffffff80 f: e8 54 fe fa ff call 0xfffafe68 14: 00 00 add %al,(%rax) 16: cc int3 17: cc int3 18: 55 push %rbp 19: 48 89 e5 mov %rsp,%rbp 1c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 21: 0f 00 2d 80 13 4d 00 verw 0x4d1380(%rip) # 0x4d13a8 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: 66 90 xchg %ax,%ax 38: 55 push %rbp 39: 48 89 e5 mov %rsp,%rbp 3c: 41 57 push %r15 3e: 41 56 push %r14