EXT4-fs (loop6): bad geometry: block count 128 exceeds size of device (1 blocks) loop0: detected capacity change from 0 to 4 EXT4-fs (loop0): invalid first ino: 0 ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x42c9/0x5e70 Read of size 8 at addr ffff888043b0b968 by task syz-executor/13850 CPU: 1 PID: 13850 Comm: syz-executor Not tainted 6.0.0-next-20221014 #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+0x172/0x475 kasan_report+0xbb/0x1c0 __lock_acquire+0x42c9/0x5e70 lock_acquire+0x1a2/0x530 _raw_spin_lock_irq+0x32/0x50 kmemleak_scan+0x21d/0x16d0 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+0x63/0xcd RIP: 0033:0x7f77ec4aa5c3 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:00007fffdc237398 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fffdc2379d8 RCX: 00007f77ec4aa5c3 RDX: 0000000000000004 RSI: 00007f77ec560ed9 RDI: 0000000000000003 RBP: 0000000000000002 R08: 0000000000000bf6 R09: 00007fffdc389080 R10: 00007fffdc389090 R11: 0000000000000246 R12: 00000000fffffff6 R13: 00007fffdc238ef1 R14: 0000000000000000 R15: 00000000002ebb2d Allocated by task 127: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_slab_alloc+0x58/0x70 kmem_cache_alloc+0x1a9/0x3e0 __create_object+0x3d/0xc10 kmem_cache_alloc+0x235/0x3e0 __alloc_file+0x21/0x240 alloc_empty_file+0x6d/0x170 path_openat+0xd4/0x27b0 do_filp_open+0x1b6/0x410 do_sys_openat2+0x171/0x4c0 __x64_sys_openat+0x13f/0x1f0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 127: 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+0x6a/0xa30 kmem_cache_free+0xbd/0x610 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+0x6a/0xa30 kmem_cache_free+0xbd/0x610 rcu_core+0x7e2/0x2080 __do_softirq+0x1c3/0x8f5 The buggy address belongs to the object at ffff888043b0b950 which belongs to the cache kmemleak_object of size 368 The buggy address is located 24 bytes inside of 368-byte region [ffff888043b0b950, ffff888043b0bac0) The buggy address belongs to the physical page: page:0000000099fc01be refcount:1 mapcount:0 mapping:0000000000000000 index:0xffffea00005d6da0 pfn:0x43b0a head:0000000099fc01be order:1 compound_mapcount:0 compound_pincount:0 flags: 0x100000000010200(slab|head|node=0|zone=1) raw: 0100000000010200 ffff888007c4f780 dead00000012000f ffff888043b0a6c0 raw: ffffea00005d6da0 ffffea0000385020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888043b0b800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888043b0b880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888043b0b900: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb ^ ffff888043b0b980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888043b0ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================