==================================================================
BUG: KASAN: invalid-access in __xfrm_state_lookup_all net/xfrm/xfrm_state.c:1142 [inline]
BUG: KASAN: invalid-access in xfrm_state_find+0x328/0x16a0 net/xfrm/xfrm_state.c:1494
Read at addr f8f000000a5c4608 by task syz.2.598/5490
Pointer tag: [f8], memory tag: [fe]

CPU: 0 UID: 0 PID: 5490 Comm: syz.2.598 Not tainted 6.16.0-syzkaller-11743-g6bcdbd62bd56 #0 PREEMPT 
Hardware name: linux,dummy-virt (DT)
Call trace:
 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x78/0x90 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x108/0x61c mm/kasan/report.c:482
 kasan_report+0x88/0xac mm/kasan/report.c:595
 report_tag_fault arch/arm64/mm/fault.c:326 [inline]
 do_tag_recovery arch/arm64/mm/fault.c:338 [inline]
 __do_kernel_fault+0x170/0x1c8 arch/arm64/mm/fault.c:380
 do_bad_area+0x68/0x78 arch/arm64/mm/fault.c:480
 do_tag_check_fault+0x34/0x44 arch/arm64/mm/fault.c:853
 do_mem_abort+0x44/0x94 arch/arm64/mm/fault.c:929
 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:481
 el1h_64_sync_handler+0x50/0xac arch/arm64/kernel/entry-common.c:597
 el1h_64_sync+0x6c/0x70 arch/arm64/kernel/entry.S:591
 __xfrm_state_lookup_all net/xfrm/xfrm_state.c:1142 [inline] (P)
 xfrm_state_find+0x328/0x16a0 net/xfrm/xfrm_state.c:1494 (P)
 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2522 [inline]
 xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2573 [inline]
 xfrm_resolve_and_create_bundle+0x1b8/0x1014 net/xfrm/xfrm_policy.c:2871
 xfrm_lookup_with_ifid+0xf8/0xba0 net/xfrm/xfrm_policy.c:3205
 xfrm_lookup net/xfrm/xfrm_policy.c:3336 [inline]
 xfrm_lookup_route+0x28/0xb8 net/xfrm/xfrm_policy.c:3347
 ip_route_output_flow+0xd4/0xe0 net/ipv4/route.c:2930
 udp_sendmsg+0x6e0/0xaa0 net/ipv4/udp.c:1450
 inet_sendmsg+0x44/0x70 net/ipv4/af_inet.c:851
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x54/0x60 net/socket.c:729
 ____sys_sendmsg+0x190/0x29c net/socket.c:2614
 ___sys_sendmsg+0xac/0x100 net/socket.c:2668
 __sys_sendmmsg+0x104/0x258 net/socket.c:2757
 __do_sys_sendmmsg net/socket.c:2784 [inline]
 __se_sys_sendmmsg net/socket.c:2781 [inline]
 __arm64_sys_sendmmsg+0x28/0x38 net/socket.c:2781
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x48/0x110 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:151
 el0_svc+0x34/0x10c arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:596

The buggy address belongs to the object at fff000000a5c4340
 which belongs to the cache xfrm_state of size 824
The buggy address is located 712 bytes inside of
 824-byte region [fff000000a5c4340, fff000000a5c4678)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xf7f000000a5c4000 pfn:0x4a5c4
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x1ffc00000000040(head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0)
page_type: f5(slab)
raw: 01ffc00000000040 f1f00000041abf00 dead000000000122 0000000000000000
raw: f7f000000a5c4000 0000000080130012 00000000f5000000 0000000000000000
head: 01ffc00000000040 f1f00000041abf00 dead000000000122 0000000000000000
head: f7f000000a5c4000 0000000080130012 00000000f5000000 0000000000000000
head: 01ffc00000000002 ffffc1ffc0297101 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 fff000000a5c4400: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 fff000000a5c4500: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
>fff000000a5c4600: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
                   ^
 fff000000a5c4700: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 fff000000a5c4800: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
==================================================================
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
  ESR = 0x0000000096000046
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000046, ISS2 = 0x00000000
  CM = 0, WnR = 1, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
user pgtable: 4k pages, 52-bit VAs, pgdp=0000000043ab2700
[0000000000000000] pgd=080000004b658403, p4d=080000004895b403, pud=0800000046700403, pmd=0000000000000000
Internal error: Oops: 0000000096000046 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 5490 Comm: syz.2.598 Tainted: G    B               6.16.0-syzkaller-11743-g6bcdbd62bd56 #0 PREEMPT 
Tainted: [B]=BAD_PAGE
Hardware name: linux,dummy-virt (DT)
pstate: 81402009 (Nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : hlist_add_before_rcu include/linux/rculist.h:705 [inline]
pc : xfrm_state_find+0x144c/0x16a0 net/xfrm/xfrm_state.c:1574
lr : xfrm_spi_hash net/xfrm/xfrm_state.c:88 [inline]
lr : xfrm_state_find+0x13fc/0x16a0 net/xfrm/xfrm_state.c:1573
sp : ffff80008b1734a0
x29: ffff80008b1734a0 x28: fbf0000009f6a280 x27: f5f000000a5c43b4
x26: 0000000000000002 x25: fbf0000009f69600 x24: f5f000000a5c4340
x23: fbf0000009f6a580 x22: f1f0000006e63988 x21: ffff80008b17396c
x20: f5f000000a5c4418 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000002
x14: 0000000000000000 x13: 0000000000000033 x12: 0000000000000000
x11: fcf000000a471c80 x10: 0000000000000000 x9 : faf00000031ea000
x8 : 0000000081b20188 x7 : dead000000000100 x6 : 000000000000001b
x5 : fdf0000006f8dc80 x4 : faf000000a4d13d8 x3 : f8f000000a5c4368
x2 : 0000000000000000 x1 : f5f000000a5c4368 x0 : f8f000000a5c4340
Call trace:
 hlist_add_before_rcu include/linux/rculist.h:703 [inline] (P)
 xfrm_state_find+0x144c/0x16a0 net/xfrm/xfrm_state.c:1574 (P)
 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2522 [inline]
 xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2573 [inline]
 xfrm_resolve_and_create_bundle+0x1b8/0x1014 net/xfrm/xfrm_policy.c:2871
 xfrm_lookup_with_ifid+0xf8/0xba0 net/xfrm/xfrm_policy.c:3205
 xfrm_lookup net/xfrm/xfrm_policy.c:3336 [inline]
 xfrm_lookup_route+0x28/0xb8 net/xfrm/xfrm_policy.c:3347
 ip_route_output_flow+0xd4/0xe0 net/ipv4/route.c:2930
 udp_sendmsg+0x6e0/0xaa0 net/ipv4/udp.c:1450
 inet_sendmsg+0x44/0x70 net/ipv4/af_inet.c:851
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x54/0x60 net/socket.c:729
 ____sys_sendmsg+0x190/0x29c net/socket.c:2614
 ___sys_sendmsg+0xac/0x100 net/socket.c:2668
 __sys_sendmmsg+0x104/0x258 net/socket.c:2757
 __do_sys_sendmmsg net/socket.c:2784 [inline]
 __se_sys_sendmmsg net/socket.c:2781 [inline]
 __arm64_sys_sendmmsg+0x28/0x38 net/socket.c:2781
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x48/0x110 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:151
 el0_svc+0x34/0x10c arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:596
Code: 9100a003 9100a301 f9001703 f9001b02 (c89ffc41) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	9100a003 	add	x3, x0, #0x28
   4:	9100a301 	add	x1, x24, #0x28
   8:	f9001703 	str	x3, [x24, #40]
   c:	f9001b02 	str	x2, [x24, #48]
* 10:	c89ffc41 	stlr	x1, [x2] <-- trapping instruction