================================================================== BUG: KASAN: slab-use-after-free in __xfrm_state_lookup.isra.0+0x752/0x870 Read of size 2 at addr ffff88804c5dc142 by task syz-executor.3/16209 CPU: 0 UID: 0 PID: 16209 Comm: syz-executor.3 Tainted: G W 6.17.0-rc4-next-20250902 #1 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xca/0x120 print_report+0xcb/0x610 kasan_report+0xca/0x100 __xfrm_state_lookup.isra.0+0x752/0x870 xfrm_state_lookup+0xf7/0x2a0 xfrm_user_state_lookup.constprop.0+0x26a/0x360 xfrm_del_sa+0xdd/0x3e0 xfrm_user_rcv_msg+0x459/0xa00 netlink_rcv_skb+0x147/0x430 xfrm_netlink_rcv+0x74/0x90 netlink_unicast+0x5a7/0x870 netlink_sendmsg+0x8ac/0xd80 ____sys_sendmsg+0xa67/0xc20 ___sys_sendmsg+0x10f/0x1b0 __sys_sendmsg+0x150/0x200 do_syscall_64+0xbf/0x360 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1cc8d99b19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1cc630f188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f1cc8eacf60 RCX: 00007f1cc8d99b19 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 00007f1cc8df3f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd897cc36f R14: 00007f1cc630f300 R15: 0000000000022000 Allocated by task 9354: kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x59/0x70 kmem_cache_alloc_noprof+0x205/0x690 xfrm_state_alloc+0x25/0x600 __find_acq_core+0x9c8/0x27a0 xfrm_find_acq+0x7f/0xb0 xfrm_alloc_userspi+0x589/0xbb0 xfrm_user_rcv_msg+0x459/0xa00 netlink_rcv_skb+0x147/0x430 xfrm_netlink_rcv+0x74/0x90 netlink_unicast+0x5a7/0x870 netlink_sendmsg+0x8ac/0xd80 ____sys_sendmsg+0xa67/0xc20 ___sys_sendmsg+0x10f/0x1b0 __sys_sendmsg+0x150/0x200 do_syscall_64+0xbf/0x360 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 23: kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_save_free_info+0x3a/0x60 __kasan_slab_free+0x3f/0x50 kmem_cache_free+0x2a1/0x540 xfrm_state_gc_task+0x107/0x740 process_one_work+0x8e1/0x19c0 worker_thread+0x67e/0xe90 kthread+0x3c8/0x740 ret_from_fork+0x34b/0x430 ret_from_fork_asm+0x1a/0x30 The buggy address belongs to the object at ffff88804c5dc000 which belongs to the cache xfrm_state of size 920 The buggy address is located 322 bytes inside of freed 920-byte region [ffff88804c5dc000, ffff88804c5dc398) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88804c5dccc0 pfn:0x4c5dc head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x100000000000040(head|node=0|zone=1) page_type: f5(slab) raw: 0100000000000040 ffff88800a9f6000 dead000000000122 0000000000000000 raw: ffff88804c5dccc0 00000000800f000b 00000000f5000000 0000000000000000 head: 0100000000000040 ffff88800a9f6000 dead000000000122 0000000000000000 head: ffff88804c5dccc0 00000000800f000b 00000000f5000000 0000000000000000 head: 0100000000000002 ffffea0001317701 00000000ffffffff 00000000ffffffff head: 00000000000001d3 0000000000000000 00000000ffffffff 0000000000000004 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88804c5dc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804c5dc080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88804c5dc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804c5dc180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804c5dc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== hpet: Lost 2 RTC interrupts netlink: 28 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 28 bytes leftover after parsing attributes in process `syz-executor.3'. faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 syz-executor.1 (16835) used greatest stack depth: 22576 bytes left faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.6'. cgroup: fork rejected by pids controller in /syz1 kernel profiling enabled (shift: 63) profiling shift: 63 too large kernel profiling enabled (shift: 63) profiling shift: 63 too large kernel profiling enabled (shift: 63) profiling shift: 63 too large kernel profiling enabled (shift: 63) profiling shift: 63 too large kernel profiling enabled (shift: 63) profiling shift: 63 too large kernel profiling enabled (shift: 63) profiling shift: 63 too large kernel profiling enabled (shift: 63) profiling shift: 63 too large kernel profiling enabled (shift: 63) profiling shift: 63 too large kernel profiling enabled (shift: 63) profiling shift: 63 too large kernel profiling enabled (shift: 63) profiling shift: 63 too large ieee802154 phy0 wpan0: encryption failed: -90 tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' ieee802154 phy0 wpan0: encryption failed: -90 ieee802154 phy0 wpan0: encryption failed: -90 ieee802154 phy0 wpan0: encryption failed: -90