will be removed in v5.15!
======================================================
syz-executor.1 (10019) used greatest stack depth: 23760 bytes left
------------[ cut here ]------------
audit: type=1800 audit(1670573321.685:2): pid=10031 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file2" dev="loop2" ino=3 res=0
kernel BUG at fs/fat/inode.c:161!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 10031 Comm: syz-executor.2 Not tainted 4.14.301-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
task: ffff88808de926c0 task.stack: ffff888095288000
RIP: 0010:__fat_get_block fs/fat/inode.c:161 [inline]
RIP: 0010:fat_get_block+0x647/0x750 fs/fat/inode.c:176
RSP: 0018:ffff88809528f328 EFLAGS: 00010216
RAX: 0000000000040000 RBX: ffff888047a052a0 RCX: ffffc9000801c000
RDX: 0000000000000d01 RSI: ffffffff81d000a7 RDI: ffff888047b01ae8
RBP: ffff888047b01ba0 R08: ffff88809528f3c0 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88808de926c0 R12: ffff888092e44bc0
R13: 0000000000000000 R14: 000000000000000b R15: 0000000000000001
FS:  00007f1cb777c700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5f5bce2000 CR3: 00000000a77c8000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __block_write_begin_int+0x35c/0x11d0 fs/buffer.c:2038
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
 __block_write_begin fs/buffer.c:2088 [inline]
 block_write_begin+0x58/0x270 fs/buffer.c:2147
 cont_write_begin+0x4a3/0x740 fs/buffer.c:2497
TCP: tcp_parse_options: Illegal window scaling value 96 > 14 received
 fat_write_begin+0x89/0x170 fs/fat/inode.c:222
 generic_perform_write+0x1d5/0x430 mm/filemap.c:3055
 __generic_file_write_iter+0x42b/0x590 mm/filemap.c:3148
 generic_file_write_iter+0x36f/0x650 mm/filemap.c:3208
 call_write_iter include/linux/fs.h:1780 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x44c/0x630 fs/read_write.c:482
 __kernel_write+0xf5/0x330 fs/read_write.c:501
 write_pipe_buf+0x143/0x1c0 fs/splice.c:797
 splice_from_pipe_feed fs/splice.c:502 [inline]
 __splice_from_pipe+0x326/0x7a0 fs/splice.c:626
 splice_from_pipe fs/splice.c:661 [inline]
 default_file_splice_write+0xc5/0x150 fs/splice.c:809
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x115/0x160 fs/splice.c:1018
 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973
 do_splice_direct+0x164/0x210 fs/splice.c:1061
 do_sendfile+0x47f/0xb30 fs/read_write.c:1441
 SYSC_sendfile64 fs/read_write.c:1502 [inline]
 SyS_sendfile64+0xff/0x110 fs/read_write.c:1488
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f1cb920a0d9
RSP: 002b:00007f1cb777c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f1cb9329f80 RCX: 00007f1cb920a0d9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007f1cb9265ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 000080001d00c0d1 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc997f418f R14: 00007f1cb777c300 R15: 0000000000022000
Code: 1a af ff e9 bd fa ff ff 48 8b 7c 24 20 e8 d2 19 af ff e9 f4 fb ff ff 48 8b 7c 24 38 e8 d3 18 af ff e9 52 fe ff ff e8 99 59 85 ff <0f> 0b e8 92 59 85 ff 0f 0b e8 8b 1a af ff e9 b1 fa ff ff 48 8b 
RIP: __fat_get_block fs/fat/inode.c:161 [inline] RSP: ffff88809528f328
RIP: fat_get_block+0x647/0x750 fs/fat/inode.c:176 RSP: ffff88809528f328
FAT-fs (loop3): bogus logical sector size 24014
FAT-fs (loop3): Can't find a valid FAT filesystem
---[ end trace 417d5a0e0a075388 ]---