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BUG: KASAN: use-after-free in crc16+0x235/0x2d0 lib/crc16.c:58
Read of size 1 at addr ffff888116f5b000 by task syz-executor.5/2470

CPU: 0 PID: 2470 Comm: syz-executor.5 Not tainted 5.10.161-syzkaller-00019-g416c4356f372 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3c0 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report+0x1a4/0x1f0 mm/kasan/report.c:436
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306
 crc16+0x235/0x2d0 lib/crc16.c:58
 ext4_group_desc_csum+0x851/0xb50 fs/ext4/super.c:2850
 ext4_group_desc_csum_set+0x1d6/0x270 fs/ext4/super.c:2873
 ext4_free_blocks+0x1b9e/0x2ad0 fs/ext4/mballoc.c:5527
 ext4_remove_blocks+0xaf1/0x1180 fs/ext4/extents.c:2520
 ext4_ext_rm_leaf+0xaa8/0x18c0 fs/ext4/extents.c:2704
 ext4_ext_remove_space+0xf25/0x22a0 fs/ext4/extents.c:2952
 ext4_ext_truncate+0x18a/0x210 fs/ext4/extents.c:4413
 ext4_truncate+0xba0/0x1270 fs/ext4/inode.c:4356
 ext4_evict_inode+0xf1e/0x1730 fs/ext4/inode.c:288
 evict+0x2a3/0x6c0 fs/inode.c:577
 iput_final fs/inode.c:1655 [inline]
 iput+0x61f/0x7d0 fs/inode.c:1681
 do_unlinkat+0x51a/0x920 fs/namei.c:3982
 __do_sys_unlink fs/namei.c:4022 [inline]
 __se_sys_unlink fs/namei.c:4020 [inline]
 __x64_sys_unlink+0x49/0x50 fs/namei.c:4020
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f5d757a40f9
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:00007f5d74517168 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f5d758c3f80 RCX: 00007f5d757a40f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000200
RBP: 00007f5d757ffae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd4f79f27f R14: 00007f5d74517300 R15: 0000000000022000

The buggy address belongs to the page:
page:ffffea00045bd6c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x116f5b
flags: 0x8000000000000000()
raw: 8000000000000000 ffffea00053fb208 ffffea0004672c88 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 2468, ts 169056442819, free_ts 169163389780
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2386 [inline]
 prep_new_page mm/page_alloc.c:2392 [inline]
 get_page_from_freelist+0x755/0x810 mm/page_alloc.c:4073
 __alloc_pages_nodemask+0x3b6/0x890 mm/page_alloc.c:5160
 __vmalloc_area_node mm/vmalloc.c:2496 [inline]
 __vmalloc_node_range+0x33f/0x6d0 mm/vmalloc.c:2566
 alloc_thread_stack_node kernel/fork.c:250 [inline]
 dup_task_struct+0x724/0xe90 kernel/fork.c:899
 copy_process+0x586/0x33a0 kernel/fork.c:1993
 kernel_clone+0x22d/0x900 kernel/fork.c:2524
 __do_sys_clone kernel/fork.c:2643 [inline]
 __se_sys_clone kernel/fork.c:2627 [inline]
 __x64_sys_clone+0x271/0x2e0 kernel/fork.c:2627
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1332 [inline]
 free_pcp_prepare+0x18c/0x1c0 mm/page_alloc.c:1406
 free_unref_page_prepare mm/page_alloc.c:3293 [inline]
 free_unref_page mm/page_alloc.c:3347 [inline]
 free_the_page mm/page_alloc.c:5219 [inline]
 __free_pages+0x390/0x570 mm/page_alloc.c:5228
 __vunmap+0x846/0x980 mm/vmalloc.c:2276
 free_work+0x66/0x90 mm/vmalloc.c:68
 process_one_work+0x726/0xc10 kernel/workqueue.c:2296
 worker_thread+0xb27/0x1550 kernel/workqueue.c:2442
 kthread+0x349/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299

Memory state around the buggy address:
 ffff888116f5af00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888116f5af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888116f5b000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff888116f5b080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888116f5b100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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