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kernel BUG at fs/buffer.c:3049!
blktrace: Concurrent blktraces are not allowed on loop3
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 27673 Comm: kmmpd-loop3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:submit_bh_wbc+0x5e5/0x760 fs/buffer.c:3049
Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 41 98 b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 32 98 b1 ff 0f 0b e8 2b 98 b1 ff <0f> 0b e8 24 98 b1 ff 0f 0b e8 1d 98 b1 ff 0f 0b e8 16 98 b1 ff 0f
RSP: 0018:ffff88804be17d78 EFLAGS: 00010293
RAX: ffff888051d062c0 RBX: ffff8880901697e0 RCX: ffffffff81b0e7d1
RDX: 0000000000000000 RSI: ffffffff81b0ed45 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003800
R13: 0000000000000000 R14: 0000000000000001 R15: 000000010000cece
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000080 CR3: 00000000aad67000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 write_mmp_block+0x1e4/0x310 fs/ext4/mmp.c:55
 kmmpd+0x71f/0xa80 fs/ext4/mmp.c:246
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Modules linked in:
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.2'.
---[ end trace 9b9a376a1454f862 ]---
xt_TCPMSS: Only works on TCP SYN packets
RIP: 0010:submit_bh_wbc+0x5e5/0x760 fs/buffer.c:3049
Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 41 98 b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 32 98 b1 ff 0f 0b e8 2b 98 b1 ff <0f> 0b e8 24 98 b1 ff 0f 0b e8 1d 98 b1 ff 0f 0b e8 16 98 b1 ff 0f
RSP: 0018:ffff88804be17d78 EFLAGS: 00010293
RAX: ffff888051d062c0 RBX: ffff8880901697e0 RCX: ffffffff81b0e7d1
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.2'.
RDX: 0000000000000000 RSI: ffffffff81b0ed45 RDI: 0000000000000001
blktrace: Concurrent blktraces are not allowed on loop3
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
xt_TCPMSS: Only works on TCP SYN packets
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003800
R13: 0000000000000000 R14: 0000000000000001 R15: 000000010000cece
FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0514dd7718 CR3: 00000000a5f4c000 CR4: 00000000003406f0
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.2'.
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
xt_TCPMSS: Only works on TCP SYN packets