================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x77/0x1f80 Read of size 8 at addr ffff888072b49458 by task syz-executor.0/5706 CPU: 1 PID: 5706 Comm: syz-executor.0 Not tainted 6.2.0-rc5-syzkaller-00047-g7c46948a6e9c-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: dump_stack_lvl+0x1b5/0x2a0 print_report+0x163/0x4c0 kasan_report+0xce/0x100 __lock_acquire+0x77/0x1f80 lock_acquire+0x20b/0x600 _raw_write_lock+0x2e/0x40 __update_extent_tree_range+0x467/0x1de0 f2fs_update_read_extent_cache+0x41e/0x590 f2fs_outplace_write_data+0x200/0x3d0 f2fs_do_write_data_page+0x1393/0x27c0 f2fs_write_single_data_page+0x14c1/0x2140 f2fs_write_data_pages+0x1948/0x2ed0 do_writepages+0x3a6/0x660 filemap_fdatawrite_wbc+0x125/0x180 file_write_and_wait_range+0x21f/0x320 f2fs_do_sync_file+0x7b6/0x1de0 f2fs_file_write_iter+0x7fc/0x2c20 vfs_write+0x7dd/0xc50 ksys_write+0x17c/0x2a0 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7effd828c0c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007effd8f6a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007effd83abf80 RCX: 00007effd828c0c9 RDX: 00000000000ffe00 RSI: 0000000020004200 RDI: 0000000000000004 RBP: 00007effd82e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcf18a8b3f R14: 00007effd8f6a300 R15: 0000000000022000 Allocated by task 5706: kasan_set_track+0x40/0x70 __kasan_slab_alloc+0x69/0x80 slab_post_alloc_hook+0x68/0x390 kmem_cache_alloc+0x12c/0x280 __grab_extent_tree+0x183/0x400 f2fs_init_extent_tree+0x214/0x450 f2fs_new_inode+0xdb4/0x1090 __f2fs_tmpfile+0xa5/0x380 f2fs_ioc_start_atomic_write+0x419/0x970 __f2fs_ioctl+0x1ace/0xb2b0 __se_sys_ioctl+0xf1/0x160 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5722: kasan_set_track+0x40/0x70 kasan_save_free_info+0x2b/0x40 ____kasan_slab_free+0xd6/0x120 kmem_cache_free+0x2b5/0x580 __destroy_extent_tree+0x32a/0x740 f2fs_destroy_extent_tree+0x17/0x30 f2fs_evict_inode+0x467/0x1650 evict+0x2a4/0x620 f2fs_abort_atomic_write+0xda/0x440 __f2fs_ioctl+0x315c/0xb2b0 __se_sys_ioctl+0xf1/0x160 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888072b49410 which belongs to the cache f2fs_extent_tree of size 144 The buggy address is located 72 bytes inside of 144-byte region [ffff888072b49410, ffff888072b494a0) The buggy address belongs to the physical page: page:ffffea0001cad240 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x72b49 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff8881461b4140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080130013 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x112c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5651, tgid 5650 (syz-executor.0), ts 82235488460, free_ts 16127728337 get_page_from_freelist+0x3403/0x3580 __alloc_pages+0x291/0x7e0 alloc_slab_page+0x6a/0x160 new_slab+0x84/0x2f0 ___slab_alloc+0xa07/0x1000 kmem_cache_alloc+0x1b0/0x280 __grab_extent_tree+0x183/0x400 f2fs_init_extent_tree+0x214/0x450 f2fs_new_inode+0xdb4/0x1090 f2fs_create+0x197/0x530 path_openat+0x12b9/0x2e30 do_filp_open+0x26d/0x500 do_sys_openat2+0x128/0x4f0 __x64_sys_openat+0x247/0x290 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: free_unref_page_prepare+0xf3a/0x1040 free_unref_page+0x37/0x3f0 free_contig_range+0x9e/0x150 destroy_args+0x102/0x930 debug_vm_pgtable+0x446/0x4b0 do_one_initcall+0x292/0xa20 do_initcall_level+0x157/0x210 do_initcalls+0x3f/0x80 kernel_init_freeable+0x42e/0x5e0 kernel_init+0x1d/0x2a0 ret_from_fork+0x1f/0x30 Memory state around the buggy address: ffff888072b49300: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff888072b49380: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc >ffff888072b49400: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888072b49480: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff888072b49500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================