==================================================================
BUG: KASAN: stack-out-of-bounds in jhash2 include/linux/jhash.h:137 [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+0x355/0x430 net/xfrm/xfrm_hash.h:95
Read of size 4 at addr ffff8881f6f09a78 by task kworker/1:1/24

CPU: 1 PID: 24 Comm: kworker/1:1 Not tainted 5.4.281-syzkaller-04937-gd883a2284ec1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: rcu_gp process_srcu
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 print_address_description+0x8c/0x600 mm/kasan/report.c:384
 __kasan_report+0xf3/0x120 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 jhash2 include/linux/jhash.h:137 [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+0x355/0x430 net/xfrm/xfrm_hash.h:95
 xfrm_dst_hash net/xfrm/xfrm_state.c:63 [inline]
 xfrm_state_find+0x2cc/0x2dc0 net/xfrm/xfrm_state.c:1063
 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2397 [inline]
 xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2442 [inline]
 xfrm_resolve_and_create_bundle+0x6aa/0x31d0 net/xfrm/xfrm_policy.c:2736
 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2960 [inline]
 xfrm_lookup_with_ifid+0x549/0x1c90 net/xfrm/xfrm_policy.c:3091
 xfrm_lookup net/xfrm/xfrm_policy.c:3183 [inline]
 xfrm_lookup_route+0x37/0x170 net/xfrm/xfrm_policy.c:3194
 ip_route_output_flow+0x1fe/0x330 net/ipv4/route.c:2750
 ip_route_output_ports include/net/route.h:163 [inline]
 igmpv3_newpack+0x437/0x1070 net/ipv4/igmp.c:374
 add_grhead+0x75/0x2c0 net/ipv4/igmp.c:445
 add_grec+0x12c9/0x15d0 net/ipv4/igmp.c:579
 igmpv3_send_cr net/ipv4/igmp.c:716 [inline]
 igmp_ifc_timer_expire+0x7bc/0xea0 net/ipv4/igmp.c:814
 call_timer_fn+0x36/0x390 kernel/time/timer.c:1448
 expire_timers kernel/time/timer.c:1493 [inline]
 __run_timers+0x879/0xbe0 kernel/time/timer.c:1817
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1830
 __do_softirq+0x23b/0x6b7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x195/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:539 [inline]
 smp_apic_timer_interrupt+0x11a/0x460 arch/x86/kernel/apic/apic.c:1149
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_cmp8+0x1a/0x70 kernel/kcov.c:255
Code: 74 0a 18 4c 89 44 0a 20 49 ff c1 4c 89 09 c3 90 4c 8b 04 24 65 48 8b 15 f4 52 9e 7e 65 8b 05 f9 52 9e 7e a9 00 01 1f 00 74 01 <c3> 8b 82 00 0a 00 00 83 f8 03 75 f4 48 8b 8a 08 0a 00 00 44 8b 92
RSP: 0018:ffff8881f22f7bd0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffffffff868e88c0 RCX: ffff8881f5cd8000
RDX: ffff8881f5cd8000 RSI: 0000000000000008 RDI: 0000000000000000
RBP: 000000000000059d R08: ffffffff822c3873 R09: ffffed103e45ef81
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffffffff0bd6ef9 R14: 0000000000000008 R15: ffffffff85eb7678
 _find_next_bit lib/find_bit.c:36 [inline]
 find_next_bit+0x23/0x100 lib/find_bit.c:70
 srcu_readers_unlock_idx kernel/rcu/srcutree.c:272 [inline]
 srcu_readers_active_idx_check kernel/rcu/srcutree.c:288 [inline]
 try_check_zero+0x6b/0x360 kernel/rcu/srcutree.c:704
 srcu_advance_state kernel/rcu/srcutree.c:1146 [inline]
 process_srcu+0x1ab/0xc40 kernel/rcu/srcutree.c:1241
 process_one_work+0x765/0xd20 kernel/workqueue.c:2290
 worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354

The buggy address belongs to the page:
page:ffffea0007dbc240 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000001000(reserved)
raw: 8000000000001000 ffffea0007dbc248 ffffea0007dbc248 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffff8881f6f09900: 00 00 00 00 00 00 f3 f3 f3 f3 f3 f3 00 00 00 00
 ffff8881f6f09980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881f6f09a00: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 f3
                                                                ^
 ffff8881f6f09a80: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881f6f09b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
   0:	74 0a                	je     0xc
   2:	18 4c 89 44          	sbb    %cl,0x44(%rcx,%rcx,4)
   6:	0a 20                	or     (%rax),%ah
   8:	49 ff c1             	inc    %r9
   b:	4c 89 09             	mov    %r9,(%rcx)
   e:	c3                   	ret
   f:	90                   	nop
  10:	4c 8b 04 24          	mov    (%rsp),%r8
  14:	65 48 8b 15 f4 52 9e 	mov    %gs:0x7e9e52f4(%rip),%rdx        # 0x7e9e5310
  1b:	7e
  1c:	65 8b 05 f9 52 9e 7e 	mov    %gs:0x7e9e52f9(%rip),%eax        # 0x7e9e531c
  23:	a9 00 01 1f 00       	test   $0x1f0100,%eax
  28:	74 01                	je     0x2b
* 2a:	c3                   	ret <-- trapping instruction
  2b:	8b 82 00 0a 00 00    	mov    0xa00(%rdx),%eax
  31:	83 f8 03             	cmp    $0x3,%eax
  34:	75 f4                	jne    0x2a
  36:	48 8b 8a 08 0a 00 00 	mov    0xa08(%rdx),%rcx
  3d:	44                   	rex.R
  3e:	8b                   	.byte 0x8b
  3f:	92                   	xchg   %eax,%edx