Buffer I/O error on dev loop2, logical block 10, lost async page write Buffer I/O error on dev loop1, logical block 10, lost async page write Buffer I/O error on dev loop5, logical block 10, lost async page write ================================================================== BUG: KASAN: use-after-free in perf_trace_lock_acquire+0x3fe/0x530 Read of size 8 at addr ffff8880430ad7d0 by task syz-executor/12534 CPU: 0 PID: 12534 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 perf_trace_lock_acquire+0x3fe/0x530 lock_acquire+0x413/0x530 _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: 0033:0x7fd25311a5c3 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:00007ffc89c810c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffc89c81708 RCX: 00007fd25311a5c3 RDX: 0000000000000004 RSI: 00007fd2531d0ed9 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000dd0 R09: 00007ffc89d58080 R10: 00007ffc89d58090 R11: 0000000000000246 R12: 00007fd25311cb10 R13: 00007ffc89c82edb R14: 0000000000000000 R15: 000000000035f572 Allocated by task 12535: 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 126: 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 __put_anon_vma+0x110/0x390 unlink_anon_vmas+0x4a7/0x710 free_pgtables+0x24d/0x420 exit_mmap+0x1b4/0x680 mmput+0xd1/0x390 copy_process+0x2da7/0x6e20 kernel_clone+0xe7/0x890 __do_sys_clone3+0x1d5/0x2e0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8880430ad7a0 which belongs to the cache kmemleak_object of size 368 The buggy address is located 48 bytes inside of 368-byte region [ffff8880430ad7a0, ffff8880430ad910) The buggy address belongs to the physical page: page:000000008b4e8ace refcount:1 mapcount:0 mapping:0000000000000000 index:0xffffea0000845a80 pfn:0x430ac head:000000008b4e8ace order:1 compound_mapcount:0 compound_pincount:0 flags: 0x100000000010200(slab|head|node=0|zone=1) raw: 0100000000010200 ffff888007c4f780 dead000000120012 0000000000000000 raw: ffffea0000845a80 dead000000000002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880430ad680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880430ad700: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8880430ad780: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880430ad800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880430ad880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================