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BUG: KASAN: slab-use-after-free in __xfrm_state_lookup_all net/xfrm/xfrm_state.c:1143 [inline]
BUG: KASAN: slab-use-after-free in xfrm_state_find+0x7401/0x84c0 net/xfrm/xfrm_state.c:1494
Read of size 1 at addr ffff888035f78330 by task syz.0.1035/9240

CPU: 0 UID: 0 PID: 9240 Comm: syz.0.1035 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 __xfrm_state_lookup_all net/xfrm/xfrm_state.c:1143 [inline]
 xfrm_state_find+0x7401/0x84c0 net/xfrm/xfrm_state.c:1494
 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+0x4cd/0x3740 net/xfrm/xfrm_policy.c:2871
 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:3106 [inline]
 xfrm_lookup_with_ifid+0x51d/0x1e40 net/xfrm/xfrm_policy.c:3237
 xfrm_lookup net/xfrm/xfrm_policy.c:3336 [inline]
 xfrm_lookup_route+0x3b/0x200 net/xfrm/xfrm_policy.c:3347
 ip_route_output_flow+0x11e/0x150 net/ipv4/route.c:2930
 ip_route_connect include/net/route.h:355 [inline]
 __ip4_datagram_connect+0x8bf/0x14c0 net/ipv4/datagram.c:49
 udp_connect+0x2e/0x70 net/ipv4/udp.c:2153
 inet_dgram_connect+0x143/0x200 net/ipv4/af_inet.c:592
 __sys_connect_file+0x13e/0x1a0 net/socket.c:2086
 __sys_connect+0x13b/0x160 net/socket.c:2105
 __do_sys_connect net/socket.c:2111 [inline]
 __se_sys_connect net/socket.c:2108 [inline]
 __x64_sys_connect+0x72/0xb0 net/socket.c:2108
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0d0178ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0d026c5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f0d019b5fa0 RCX: 00007f0d0178ebe9
RDX: 0000000000000010 RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007f0d01811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0d019b6038 R14: 00007f0d019b5fa0 R15: 00007ffc4182be28
 </TASK>

Allocated by task 6174:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:330 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4180 [inline]
 slab_alloc_node mm/slub.c:4229 [inline]
 kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
 xfrm_state_alloc+0x23/0x5c0 net/xfrm/xfrm_state.c:733
 __find_acq_core+0xb59/0x2900 net/xfrm/xfrm_state.c:1833
 xfrm_find_acq+0x7b/0xa0 net/xfrm/xfrm_state.c:2353
 xfrm_alloc_userspi+0x58e/0xbb0 net/xfrm/xfrm_user.c:1863
 xfrm_user_rcv_msg+0x58b/0xc00 net/xfrm/xfrm_user.c:3501
 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
 xfrm_netlink_rcv+0x71/0x90 net/xfrm/xfrm_user.c:3523
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg net/socket.c:729 [inline]
 ____sys_sendmsg+0xa95/0xc70 net/socket.c:2614
 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2668
 __sys_sendmsg+0x16d/0x220 net/socket.c:2700
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 1028:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:243 [inline]
 __kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2417 [inline]
 slab_free mm/slub.c:4680 [inline]
 kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4782
 xfrm_state_free net/xfrm/xfrm_state.c:591 [inline]
 xfrm_state_gc_destroy net/xfrm/xfrm_state.c:618 [inline]
 xfrm_state_gc_task+0x50a/0x770 net/xfrm/xfrm_state.c:634
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff888035f78000
 which belongs to the cache xfrm_state of size 928
The buggy address is located 816 bytes inside of
 freed 928-byte region [ffff888035f78000, ffff888035f783a0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888035f78cc0 pfn:0x35f78
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff8881007c9680 dead000000000122 0000000000000000
raw: ffff888035f78cc0 00000000801e001b 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff8881007c9680 dead000000000122 0000000000000000
head: ffff888035f78cc0 00000000801e001b 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0000d7de01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 6174, tgid 6173 (syz.0.45), ts 52539755428, free_ts 52199251470
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:2487 [inline]
 allocate_slab mm/slub.c:2655 [inline]
 new_slab+0x247/0x330 mm/slub.c:2709
 ___slab_alloc+0xcf2/0x1740 mm/slub.c:3891
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3981
 __slab_alloc_node mm/slub.c:4056 [inline]
 slab_alloc_node mm/slub.c:4217 [inline]
 kmem_cache_alloc_noprof+0xef/0x3b0 mm/slub.c:4236
 xfrm_state_alloc+0x23/0x5c0 net/xfrm/xfrm_state.c:733
 __find_acq_core+0xb59/0x2900 net/xfrm/xfrm_state.c:1833
 xfrm_find_acq+0x7b/0xa0 net/xfrm/xfrm_state.c:2353
 xfrm_alloc_userspi+0x58e/0xbb0 net/xfrm/xfrm_user.c:1863
 xfrm_user_rcv_msg+0x58b/0xc00 net/xfrm/xfrm_user.c:3501
 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
 xfrm_netlink_rcv+0x71/0x90 net/xfrm/xfrm_user.c:3523
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346
page last free pid 6154 tgid 6154 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
 discard_slab mm/slub.c:2753 [inline]
 __put_partials+0x165/0x1c0 mm/slub.c:3218
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:340
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4180 [inline]
 slab_alloc_node mm/slub.c:4229 [inline]
 kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
 ptlock_alloc mm/memory.c:7161 [inline]
 ptlock_init include/linux/mm.h:2953 [inline]
 pmd_ptlock_init include/linux/mm.h:3081 [inline]
 pagetable_pmd_ctor include/linux/mm.h:3109 [inline]
 pmd_alloc_one_noprof include/asm-generic/pgalloc.h:145 [inline]
 __pmd_alloc+0xbf/0x930 mm/memory.c:6450
 pmd_alloc include/linux/mm.h:2844 [inline]
 __handle_mm_fault+0xa06/0x2a50 mm/memory.c:6155
 handle_mm_fault+0x589/0xd10 mm/memory.c:6364
 do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

Memory state around the buggy address:
 ffff888035f78200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888035f78280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888035f78300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff888035f78380: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888035f78400: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
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