loop0: detected capacity change from 0 to 140 ext4: Unknown parameter 'ϣ"fOpu΅8%cg%贇Gz\ӧQ+Lm ̔`/Ţ>erH|> ' ================================================================== BUG: KASAN: use-after-free in perf_trace_lock_acquire+0x402/0x530 Read of size 8 at addr ffff88800e87b750 by task syz-executor/7827 CPU: 1 PID: 7827 Comm: syz-executor Not tainted 6.1.0-rc5-next-20221118 #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 perf_trace_lock_acquire+0x402/0x530 lock_acquire+0x417/0x530 _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: 0033:0x7f51bdcf55c3 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:00007ffcc67d0a18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffcc67d1058 RCX: 00007f51bdcf55c3 RDX: 0000000000000004 RSI: 00007f51bddabed9 RDI: 0000000000000003 RBP: 0000000000000002 R08: 00000000000002cd R09: 00007ffcc67f9080 R10: 00007ffcc67f9090 R11: 0000000000000246 R12: 00000000fffffff6 R13: 00007ffcc67d2ef1 R14: 0000000000000000 R15: 00000000000af450 Allocated by task 7831: 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+0x272/0x410 __alloc_file+0x21/0x240 alloc_empty_file+0x71/0x170 path_openat+0xd4/0x29b0 do_filp_open+0x1ba/0x410 do_sys_openat2+0x171/0x4c0 __x64_sys_openat+0x143/0x200 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc Freed by task 13: 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+0x7cf/0x2070 __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+0x7cf/0x2070 __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 ___pte_free_tlb+0x1d/0x110 free_pgd_range+0x7be/0x1330 free_pgtables+0x2d6/0x420 exit_mmap+0x1b8/0x680 mmput+0xd5/0x390 do_exit+0x99b/0x2720 do_group_exit+0xd4/0x2a0 get_signal+0x21a5/0x22e0 arch_do_signal_or_restart+0x79/0x5a0 exit_to_user_mode_prepare+0x131/0x1a0 syscall_exit_to_user_mode+0x1d/0x50 do_syscall_64+0x4c/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc The buggy address belongs to the object at ffff88800e87b720 which belongs to the cache kmemleak_object of size 240 The buggy address is located 48 bytes inside of 240-byte region [ffff88800e87b720, ffff88800e87b810) The buggy address belongs to the physical page: page:0000000035e52366 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe87b anon flags: 0x100000000000200(slab|node=0|zone=1) raw: 0100000000000200 ffff88800844f780 ffffea00003a3040 dead000000000003 raw: 0000000000000000 00000000000d000d 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88800e87b600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88800e87b680: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff88800e87b700: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb ^ ffff88800e87b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88800e87b800: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 ==================================================================