loop0: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop0, logical block 10, lost async page write loop6: detected capacity change from 0 to 40 ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x42c9/0x5e70 Read of size 8 at addr ffff88800d1ad278 by task syz-executor/9564 CPU: 1 PID: 9564 Comm: syz-executor Not tainted 6.1.0-rc3-next-20221104 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0x8b/0xb3 print_report+0x175/0x478 kasan_report+0xbb/0x1c0 __lock_acquire+0x42c9/0x5e70 lock_acquire+0x1a2/0x530 _raw_spin_lock_irq+0x32/0x50 kmemleak_scan+0x1a0/0x1600 kmemleak_write+0x570/0x680 full_proxy_write+0x11d/0x190 vfs_write+0x2cb/0xd90 ksys_write+0x127/0x250 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7ff257d855c3 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:00007fff3ccdf728 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fff3ccdfd68 RCX: 00007ff257d855c3 RDX: 0000000000000004 RSI: 00007ff257e3bed9 RDI: 0000000000000003 RBP: 0000000000000002 R08: 00000000000008b1 R09: 00007fff3cdcf080 R10: 00007fff3cdcf090 R11: 0000000000000246 R12: 00000000fffffff6 R13: 00007fff3cce0ef1 R14: 0000000000000000 R15: 000000000021f495 Allocated by task 9515: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_slab_alloc+0x58/0x70 kmem_cache_alloc+0x1a9/0x3e0 __create_object+0x3d/0xc00 __kmem_cache_alloc_node+0x22f/0x3d0 __kmalloc_node_track_caller+0x3d/0xb0 kmemdup+0x28/0x60 shmem_symlink+0x180/0x690 vfs_symlink+0x364/0x5b0 do_symlinkat+0x12f/0x270 __x64_sys_symlink+0x75/0x90 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc Freed by task 13: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x2a/0x50 __kasan_slab_free+0x106/0x190 kmem_cache_free+0xf7/0x610 rcu_core+0x7e2/0x2080 __do_softirq+0x1c3/0x8f5 Last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x95/0xb0 __call_rcu_common.constprop.0+0x6a/0xa40 __kmem_cache_free+0x91/0x400 shmem_free_in_core_inode+0x8b/0xa0 i_callback+0x42/0x70 rcu_core+0x7e2/0x2080 __do_softirq+0x1c3/0x8f5 Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x95/0xb0 __call_rcu_common.constprop.0+0x6a/0xa40 __kmem_cache_free+0x91/0x400 skb_release_data+0x6d8/0x810 kfree_skb_reason+0x136/0x3e0 ieee80211_iface_work+0x34f/0xc80 process_one_work+0xa17/0x16a0 worker_thread+0x637/0x1260 kthread+0x2ed/0x3a0 ret_from_fork+0x2c/0x50 The buggy address belongs to the object at ffff88800d1ad260 which belongs to the cache kmemleak_object of size 240 The buggy address is located 24 bytes inside of 240-byte region [ffff88800d1ad260, ffff88800d1ad350) The buggy address belongs to the physical page: page:0000000067a3c1e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd1ad flags: 0x100000000000200(slab|node=0|zone=1) raw: 0100000000000200 ffff88800804f780 dead000000000100 dead000000000122 raw: 0000000000000000 00000000000d000d 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88800d1ad100: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 ffff88800d1ad180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88800d1ad200: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb ^ ffff88800d1ad280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88800d1ad300: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc ==================================================================