sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer VFS: Close: file count is 0 ================================================================== BUG: KASAN: use-after-free in filp_close+0x22/0x160 Read of size 8 at addr ffff88800ea136f0 by task syz-executor.7/13432 CPU: 0 PID: 13432 Comm: syz-executor.7 Not tainted 5.18.0-next-20220527 #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/0x5db kasan_report+0xbe/0x1c0 kasan_check_range+0xf9/0x1e0 filp_close+0x22/0x160 close_fd+0x76/0xa0 __x64_sys_close+0x2f/0xa0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f146b3d672b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007fff27494d10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00007f146b3d672b RDX: ffffffffffffffbc RSI: 0000000000000080 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f146b53dd18 R10: 00007fff27494e00 R11: 0000000000000293 R12: 00000000002b28ec R13: 00000000000003e8 R14: 00007f146b536f60 R15: 00000000002b2847 Allocated by task 13438: kasan_save_stack+0x1e/0x40 __kasan_slab_alloc+0x66/0x80 kmem_cache_alloc+0x1aa/0x480 __alloc_file+0x21/0x230 alloc_empty_file+0x6d/0x170 path_openat+0xe1/0x2870 do_filp_open+0x1aa/0x400 do_sys_openat2+0x16d/0x4c0 __x64_sys_openat+0x13f/0x1f0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Freed by task 13: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_set_free_info+0x20/0x30 __kasan_slab_free+0x108/0x170 kmem_cache_free+0xe0/0x420 rcu_core+0x7e5/0x1ff0 __do_softirq+0x270/0x8c7 Last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x97/0xa0 call_rcu+0x6a/0xa20 task_work_run+0xe2/0x1a0 exit_to_user_mode_prepare+0x199/0x1a0 syscall_exit_to_user_mode+0x19/0x40 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 __kasan_record_aux_stack+0x97/0xa0 task_work_add+0x3b/0x1f0 fput+0xe7/0x190 io_issue_sqe+0x2c08/0xa070 io_submit_sqes+0x1c74/0x7700 __do_sys_io_uring_enter+0x107f/0x2280 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x46/0xb0 The buggy address belongs to the object at ffff88800ea13680 which belongs to the cache filp of size 456 The buggy address is located 112 bytes inside of 456-byte region [ffff88800ea13680, ffff88800ea13848) The buggy address belongs to the physical page: page:00000000f8cb509f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea12 head:00000000f8cb509f order:1 compound_mapcount:0 compound_pincount:0 memcg:ffff88800e813481 flags: 0x100000000010200(slab|head|node=0|zone=1) raw: 0100000000010200 ffffea000036b280 dead000000000005 ffff88800802a500 raw: 0000000000000000 00000000000c000c 00000001ffffffff ffff88800e813481 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88800ea13580: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff88800ea13600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88800ea13680: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88800ea13700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88800ea13780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== VFS: Close: file count is 0 netlink: 60 bytes leftover after parsing attributes in process `syz-executor.6'. VFS: Close: file count is 0 VFS: Close: file count is 0