FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop5): bogus number of FAT structure FAT-fs (loop5): Can't find a valid FAT filesystem ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x42c9/0x5e70 Read of size 8 at addr ffff8880411b6d28 by task syz-executor/10219 CPU: 1 PID: 10219 Comm: syz-executor Not tainted 6.1.0-rc5-next-20221116 #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+0x358/0xe40 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7efd8178f5c3 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:00007fffef751b98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fffef7521d8 RCX: 00007efd8178f5c3 RDX: 0000000000000004 RSI: 00007efd81845ed9 RDI: 0000000000000003 RBP: 0000000000000002 R08: 000000000000069e R09: 00007fffef7b4080 R10: 00007fffef7b4090 R11: 0000000000000246 R12: 00000000fffffff6 R13: 00007fffef752ef1 R14: 0000000000000000 R15: 000000000019da5e Allocated by task 10222: kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 __kasan_slab_alloc+0x5c/0x70 kmem_cache_alloc+0x1e0/0x410 __create_object+0x3d/0xc00 kmem_cache_alloc_lru+0x307/0x760 __d_alloc+0x31/0x9c0 d_alloc+0x4a/0x1d0 __lookup_hash+0xcc/0x190 filename_create+0x1d6/0x4a0 do_symlinkat+0xc8/0x280 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc Freed by task 10222: 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 rcu_core+0x7e2/0x2090 __do_softirq+0x1c7/0x8f9 The buggy address belongs to the object at ffff8880411b6d10 which belongs to the cache kmemleak_object of size 240 The buggy address is located 24 bytes inside of 240-byte region [ffff8880411b6d10, ffff8880411b6e00) The buggy address belongs to the physical page: page:000000009117bddd refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880411b6980 pfn:0x411b6 flags: 0x100000000000200(slab|node=0|zone=1) raw: 0100000000000200 ffff88800844f780 ffffea0000666650 ffffea0000594490 raw: ffff8880411b6980 00000000000d000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880411b6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880411b6c80: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc >ffff8880411b6d00: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880411b6d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880411b6e00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ==================================================================