------------[ cut here ]------------
kernel BUG at fs/buffer.c:3049!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14686 Comm: syz-executor.0 Not tainted 4.19.209-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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:ffff88804ba4fa78 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff88804918f1f8 RCX: ffffc90005c32000
RDX: 00000000000004ff RSI: ffffffff81b0ed45 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008
FS:  00007fe09981f700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8c14a66004 CR3: 000000009cc15000 CR4: 00000000003426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bh fs/buffer.c:3096 [inline]
 __bread_slow fs/buffer.c:1176 [inline]
 __bread_gfp+0x14e/0x300 fs/buffer.c:1369
 sb_bread include/linux/buffer_head.h:309 [inline]
 qnx6_check_first_superblock+0xaa/0x250 fs/qnx6/inode.c:266
 qnx6_fill_super+0x10c0/0x1570 fs/qnx6/inode.c:340
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2492 [inline]
 do_mount+0x115c/0x2f50 fs/namespace.c:2822
 ksys_mount+0xcf/0x130 fs/namespace.c:3038
 __do_sys_mount fs/namespace.c:3052 [inline]
 __se_sys_mount fs/namespace.c:3049 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3049
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fe09c2a88d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe09981f188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe09c3acf60 RCX: 00007fe09c2a88d9
RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 0000000020000080
RBP: 00007fe09c302cb4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffbac28f5f R14: 00007fe09981f300 R15: 0000000000022000
Modules linked in:
---[ end trace 82f0869ff8ac33cc ]---
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:ffff88804ba4fa78 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff88804918f1f8 RCX: ffffc90005c32000
RDX: 00000000000004ff RSI: ffffffff81b0ed45 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008
FS:  00007fe09981f700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f236e806000 CR3: 000000009cc15000 CR4: 00000000003426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400