==================================================================
BUG: KASAN: slab-use-after-free in __hlist_del include/linux/list.h:982 [inline]
BUG: KASAN: slab-use-after-free in hlist_del_rcu include/linux/rculist.h:513 [inline]
BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x47c/0x800 net/xfrm/xfrm_state.c:753
Write of size 8 at addr ffff88805e860c30 by task syz.2.1741/12592
CPU: 1 PID: 12592 Comm: syz.2.1741 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xac/0x220 mm/kasan/report.c:468
kasan_report+0x117/0x150 mm/kasan/report.c:581
__hlist_del include/linux/list.h:982 [inline]
hlist_del_rcu include/linux/rculist.h:513 [inline]
__xfrm_state_delete+0x47c/0x800 net/xfrm/xfrm_state.c:753
xfrm_timer_handler+0x1c3/0x9e0 net/xfrm/xfrm_state.c:644
__run_hrtimer kernel/time/hrtimer.c:1750 [inline]
__hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1814
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1831
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa9/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 1a 09 14 f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 c2 79 e3 f6 65 8b 05 d3 c5 8b 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900034d74c0 EFLAGS: 00000206
RAX: 49f95a8a2fc99b00 RBX: 0000000000000a06 RCX: 49f95a8a2fc99b00
RDX: dffffc0000000000 RSI: ffffffff8aaabca0 RDI: 0000000000000001
RBP: ffffc900034d7550 R08: ffffffff90da7547 R09: 1ffffffff21b4ea8
R10: dffffc0000000000 R11: fffffbfff21b4ea9 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88805c488050 R15: 1ffff9200069ae98
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1618 [inline]
folio_batch_move_lru+0x590/0x6b0 mm/swap.c:215
folio_add_lru+0x434/0xd50 mm/swap.c:509
shmem_get_folio_gfp+0xff7/0x2ac0 mm/shmem.c:2078
shmem_fault+0x1b6/0x7f0 mm/shmem.c:2249
__do_fault+0x13b/0x4e0 mm/memory.c:4243
do_read_fault mm/memory.c:4616 [inline]
do_fault mm/memory.c:4753 [inline]
do_pte_missing mm/memory.c:3688 [inline]
handle_pte_fault mm/memory.c:5025 [inline]
__handle_mm_fault mm/memory.c:5166 [inline]
handle_mm_fault+0x3886/0x4920 mm/memory.c:5331
faultin_page mm/gup.c:868 [inline]
__get_user_pages+0x5ea/0x1470 mm/gup.c:1167
populate_vma_page_range+0x2b6/0x370 mm/gup.c:1593
__mm_populate+0x24c/0x380 mm/gup.c:1696
mm_populate include/linux/mm.h:3328 [inline]
vm_mmap_pgoff+0x2e7/0x400 mm/util.c:561
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe51098ec29
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:00007fe51173c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fe510bd5fa0 RCX: 00007fe51098ec29
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007fe510a11e41 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe510bd6038 R14: 00007fe510bd5fa0 R15: 00007ffee39a6e78
Allocated by task 12052:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc+0x11e/0x2e0 mm/slub.c:3519
kmem_cache_zalloc include/linux/slab.h:711 [inline]
xfrm_state_alloc+0x22/0x2a0 net/xfrm/xfrm_state.c:661
__find_acq_core+0x7d8/0x19d0 net/xfrm/xfrm_state.c:1598
xfrm_find_acq+0x6a/0x90 net/xfrm/xfrm_state.c:2070
xfrm_alloc_userspi+0x57a/0xa90 net/xfrm/xfrm_user.c:1613
xfrm_user_rcv_msg+0x596/0x870 net/xfrm/xfrm_user.c:3169
netlink_rcv_skb+0x216/0x480 net/netlink/af_netlink.c:2545
xfrm_netlink_rcv+0x79/0x90 net/xfrm/xfrm_user.c:3191
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x8c1/0xbe0 net/netlink/af_netlink.c:1894
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x5bf/0x950 net/socket.c:2595
___sys_sendmsg+0x220/0x290 net/socket.c:2649
__sys_sendmsg net/socket.c:2678 [inline]
__do_sys_sendmsg net/socket.c:2687 [inline]
__se_sys_sendmsg+0x1a5/0x270 net/socket.c:2685
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
The buggy address belongs to the object at ffff88805e860c00
which belongs to the cache xfrm_state of size 848
The buggy address is located 48 bytes inside of
freed 848-byte region [ffff88805e860c00, ffff88805e860f50)
The buggy address belongs to the physical page:
page:ffffea00017a1800 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805e860c00 pfn:0x5e860
head:ffffea00017a1800 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff88801cad9280 dead000000000122 0000000000000000
raw: ffff88805e860c00 000000008010000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 7038, tgid 7037 (syz.3.308), ts 205000368910, free_ts 191102131791
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554
prep_new_page mm/page_alloc.c:1561 [inline]
get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191
__alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457
alloc_slab_page+0x5d/0x170 mm/slub.c:1881
allocate_slab mm/slub.c:2028 [inline]
new_slab+0x87/0x2e0 mm/slub.c:2081
___slab_alloc+0xc6d/0x1300 mm/slub.c:3253
__slab_alloc mm/slub.c:3339 [inline]
__slab_alloc_node mm/slub.c:3392 [inline]
slab_alloc_node mm/slub.c:3485 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc+0x1b7/0x2e0 mm/slub.c:3519
kmem_cache_zalloc include/linux/slab.h:711 [inline]
xfrm_state_alloc+0x22/0x2a0 net/xfrm/xfrm_state.c:661
pfkey_msg2xfrm_state net/key/af_key.c:1122 [inline]
pfkey_add+0x6e1/0x2da0 net/key/af_key.c:1503
pfkey_process net/key/af_key.c:2847 [inline]
pfkey_sendmsg+0xbed/0x1050 net/key/af_key.c:3698
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x5bf/0x950 net/socket.c:2595
___sys_sendmsg+0x220/0x290 net/socket.c:2649
__sys_sendmsg net/socket.c:2678 [inline]
__do_sys_sendmsg net/socket.c:2687 [inline]
__se_sys_sendmsg+0x1a5/0x270 net/socket.c:2685
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1154 [inline]
free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429
__slab_free+0x35e/0x410 mm/slub.c:3736
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292
__kasan_kmalloc_large+0x1c/0xa0 mm/kasan/common.c:394
kasan_kmalloc_large include/linux/kasan.h:208 [inline]
__kmalloc_large_node+0x13d/0x1e0 mm/slab_common.c:1155
kmalloc_large+0x1b/0x120 mm/slab_common.c:1165
kmalloc include/linux/slab.h:597 [inline]
kzalloc include/linux/slab.h:721 [inline]
diMount+0x29/0xd50 fs/jfs/jfs_imap.c:105
jfs_mount+0xdc/0x860 fs/jfs/jfs_mount.c:100
jfs_fill_super+0x4e2/0xac0 fs/jfs/super.c:556
mount_bdev+0x22b/0x2d0 fs/super.c:1643
legacy_get_tree+0xea/0x180 fs/fs_context.c:662
vfs_get_tree+0x8c/0x280 fs/super.c:1764
do_new_mount+0x24b/0xa40 fs/namespace.c:3377
do_mount fs/namespace.c:3717 [inline]
__do_sys_mount fs/namespace.c:3926 [inline]
__se_sys_mount+0x2da/0x3c0 fs/namespace.c:3903
Memory state around the buggy address:
ffff88805e860b00: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc
ffff88805e860b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805e860c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805e860c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805e860d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 74 05 je 0x7
2: e8 1a 09 14 f7 call 0xf7140921
7: 48 c7 44 24 20 00 00 movq $0x0,0x20(%rsp)
e: 00 00
10: 9c pushf
11: 8f 44 24 20 pop 0x20(%rsp)
15: f6 44 24 21 02 testb $0x2,0x21(%rsp)
1a: 75 4b jne 0x67
1c: f7 c3 00 02 00 00 test $0x200,%ebx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 c2 79 e3 f6 call 0xf6e379f1 <-- trapping instruction
2f: 65 8b 05 d3 c5 8b 75 mov %gs:0x758bc5d3(%rip),%eax # 0x758bc609
36: 85 c0 test %eax,%eax
38: 74 3c je 0x76
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss