loop2: detected capacity change from 0 to 256 loop2: detected capacity change from 0 to 256 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x42c9/0x5e70 Read of size 8 at addr ffff88801c35c1c8 by task syz-executor/14259 CPU: 1 PID: 14259 Comm: syz-executor Not tainted 5.19.0-next-20220808 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack_lvl+0x8b/0xb3 print_report.cold+0x5e/0x5e5 kasan_report+0xb1/0x1c0 __lock_acquire+0x42c9/0x5e70 lock_acquire+0x1a2/0x530 _raw_spin_lock_irq+0x32/0x50 kmemleak_scan+0x21d/0x16f0 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: 0033:0x7fa1bfc345c3 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:00007ffd4b46faf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffd4b470138 RCX: 00007fa1bfc345c3 RDX: 0000000000000004 RSI: 00007fa1bfceaed9 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00000000000005ad R09: 00007ffd4b4e5080 R10: 00007ffd4b4e5090 R11: 0000000000000246 R12: 00007fa1bfc36b10 R13: 00007ffd4b471ee6 R14: 0000000000000000 R15: 0000000000162d04 Allocated by task 14261: kasan_save_stack+0x1e/0x40 __kasan_slab_alloc+0x66/0x80 kmem_cache_alloc+0x1b1/0x4a0 __create_object.isra.0+0x3d/0xc10 kmem_cache_alloc_lru+0x2e4/0x7e0 __d_alloc+0x31/0x9a0 d_alloc_parallel+0x10a/0x1520 lookup_open.isra.0+0x932/0x1270 path_openat+0x964/0x2800 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 13: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_set_free_info+0x20/0x40 __kasan_slab_free+0x108/0x190 kmem_cache_free+0xfb/0x610 rcu_core+0x7e2/0x2080 __do_softirq+0x1c8/0x8d0 Last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x97/0xb0 call_rcu+0x6a/0xa30 kmem_cache_free+0xc1/0x610 rcu_core+0x7e2/0x2080 __do_softirq+0x1c8/0x8d0 Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x97/0xb0 call_rcu+0x6a/0xa30 kmem_cache_free+0xc1/0x610 unlink_anon_vmas+0x116/0x710 free_pgtables+0x1ab/0x2f0 exit_mmap+0x195/0x440 mmput+0xc8/0x380 do_exit+0xb3e/0x2940 do_group_exit+0xd0/0x2a0 __x64_sys_exit_group+0x3a/0x50 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88801c35c1b0 which belongs to the cache kmemleak_object of size 368 The buggy address is located 24 bytes inside of 368-byte region [ffff88801c35c1b0, ffff88801c35c320) The buggy address belongs to the physical page: page:000000000a23ed85 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c35c head:000000000a23ed85 order:1 compound_mapcount:0 compound_pincount:0 flags: 0x100000000010200(slab|head|node=0|zone=1) raw: 0100000000010200 ffffea0000625600 dead000000000003 ffff888007c4f780 raw: 0000000000000000 0000000000120012 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88801c35c080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801c35c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc >ffff88801c35c180: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb ^ ffff88801c35c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801c35c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================