================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x42c9/0x5e70 Read of size 8 at addr ffff88800d2333a8 by task syz-executor/17076 CPU: 0 PID: 17076 Comm: syz-executor Not tainted 6.1.0-rc4-next-20221111 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0x8f/0xb7 print_report+0x175/0x478 kasan_report+0xbf/0x1c0 __lock_acquire+0x42c9/0x5e70 lock_acquire+0x1a6/0x530 _raw_spin_lock_irq+0x36/0x50 kmemleak_scan+0x1a0/0x1600 kmemleak_write+0x574/0x680 full_proxy_write+0x121/0x190 vfs_write+0x2cf/0xd90 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f3b8ab135c3 Code: 16 00 00 00 eb ae 90 b8 6e 00 00 00 eb a6 e8 44 ef 04 00 0f 1f 40 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 RSP: 002b:00007ffca4894758 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffca4894d98 RCX: 00007f3b8ab135c3 RDX: 0000000000000004 RSI: 00007f3b8abc9ed9 RDI: 0000000000000003 RBP: 0000000000000002 R08: 0000000000000dbe R09: 00007ffca48cd080 R10: 00007ffca48cd090 R11: 0000000000000246 R12: 00000000fffffff6 R13: 00007ffca4895ef1 R14: 0000000000000000 R15: 000000000035aea0 Allocated by task 17068: kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 __kasan_slab_alloc+0x5c/0x70 kmem_cache_alloc+0x1b1/0x3e0 __create_object+0x3d/0xc00 kmem_cache_alloc+0x23d/0x3e0 __alloc_file+0x21/0x240 alloc_empty_file+0x71/0x170 path_openat+0xd4/0x29b0 do_filp_open+0x1ba/0x410 do_sys_openat2+0x171/0x4c0 __x64_sys_openat+0x143/0x200 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc Freed by task 13: kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 kasan_save_free_info+0x2e/0x50 __kasan_slab_free+0x10a/0x190 kmem_cache_free+0xfb/0x610 rcu_core+0x7e2/0x2090 __do_softirq+0x1c7/0x8f9 Last potentially related work creation: kasan_save_stack+0x22/0x50 __kasan_record_aux_stack+0x95/0xb0 __call_rcu_common.constprop.0+0x6a/0xa40 kmem_cache_free+0xc1/0x610 rcu_core+0x7e2/0x2090 __do_softirq+0x1c7/0x8f9 Second to last potentially related work creation: kasan_save_stack+0x22/0x50 __kasan_record_aux_stack+0x95/0xb0 __call_rcu_common.constprop.0+0x6a/0xa40 kmem_cache_free+0xc1/0x610 kfree_skbmem+0xef/0x1b0 consume_skb+0xd8/0x170 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x566/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x541/0xb50 hrtimer_run_softirq+0x176/0x350 __do_softirq+0x1c7/0x8f9 The buggy address belongs to the object at ffff88800d233390 which belongs to the cache kmemleak_object of size 240 The buggy address is located 24 bytes inside of 240-byte region [ffff88800d233390, ffff88800d233480) The buggy address belongs to the physical page: page:00000000b0c03de4 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800d233720 pfn:0xd233 flags: 0x100000000000200(slab|node=0|zone=1) raw: 0100000000000200 ffff88800804f780 ffffea00003bab50 ffffea0000670d10 raw: ffff88800d233720 00000000000d000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88800d233280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88800d233300: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc >ffff88800d233380: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88800d233400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88800d233480: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ==================================================================