BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 10e33e067 P4D 10e33e067 PUD 10e33f067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 8338 Comm: syz-executor.0 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:scsi_command_size include/scsi/scsi_common.h:24 [inline]
RIP: 0010:scsi_setup_scsi_cmnd drivers/scsi/scsi_lib.c:1185 [inline]
RIP: 0010:scsi_setup_cmnd drivers/scsi/scsi_lib.c:1226 [inline]
RIP: 0010:scsi_mq_prep_fn drivers/scsi/scsi_lib.c:1604 [inline]
RIP: 0010:scsi_queue_rq+0x6aa/0xc10 drivers/scsi/scsi_lib.c:1682
Code: 0f 85 93 fc ff ff 41 8b 54 24 28 41 0f b7 84 24 40 01 00 00 66 41 89 84 24 4c 02 00 00 66 85 c0 75 29 49 8b 8c 24 58 02 00 00 <0f> b6 01 3c 7f 0f 84 15 04 00 00 c0 e8 05 83 e0 07 0f b6 80 40 78
RSP: 0018:ffffc90002edfaf0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8881281ce000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88810ebd7e40
RBP: ffff88812938c000 R08: ffff888127f53400 R09: 0000000000000000
R10: 0000000000000001 R11: 9296e02e597a92e7 R12: ffff888127f53400
R13: ffff888129390180 R14: ffffc90002edfba0 R15: 0000000000000000
FS:  00007f4964400700(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010e33d000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 blk_mq_dispatch_rq_list+0x104/0x700 block/blk-mq.c:1387
 __blk_mq_sched_dispatch_requests+0xc2/0x170 block/blk-mq-sched.c:314
 blk_mq_sched_dispatch_requests+0x2b/0x50 block/blk-mq-sched.c:347
 __blk_mq_run_hw_queue+0x68/0x110 block/blk-mq.c:1525
 __blk_mq_delay_run_hw_queue+0x1a7/0x1e0 block/blk-mq.c:1602
 blk_mq_run_hw_queue+0x81/0xd0 block/blk-mq.c:1655
 blk_mq_sched_insert_request+0x10f/0x190 block/blk-mq-sched.c:567
 blk_execute_rq+0x64/0xb0 block/blk-exec.c:86
 sg_io+0x2b7/0x430 block/scsi_ioctl.c:370
 scsi_cmd_ioctl+0x253/0x2f0 block/scsi_ioctl.c:818
 sd_ioctl+0x11/0x40 drivers/scsi/sd.c:1758
 __blkdev_driver_ioctl block/ioctl.c:224 [inline]
 blkdev_ioctl+0x1c6/0x2b0 block/ioctl.c:620
 block_ioctl+0x3a/0x40 fs/block_dev.c:1871
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x7c/0xb0 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45de29
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f49643ffc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000014f40 RCX: 000000000045de29
RDX: 00000000200046c0 RSI: 0000000000002285 RDI: 0000000000000004
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffdddd4d65f R14: 00007f49644009c0 R15: 000000000118bf2c
Modules linked in:
CR2: 0000000000000000
---[ end trace 7f3819a53e3251f5 ]---
RIP: 0010:scsi_command_size include/scsi/scsi_common.h:24 [inline]
RIP: 0010:scsi_setup_scsi_cmnd drivers/scsi/scsi_lib.c:1185 [inline]
RIP: 0010:scsi_setup_cmnd drivers/scsi/scsi_lib.c:1226 [inline]
RIP: 0010:scsi_mq_prep_fn drivers/scsi/scsi_lib.c:1604 [inline]
RIP: 0010:scsi_queue_rq+0x6aa/0xc10 drivers/scsi/scsi_lib.c:1682
Code: 0f 85 93 fc ff ff 41 8b 54 24 28 41 0f b7 84 24 40 01 00 00 66 41 89 84 24 4c 02 00 00 66 85 c0 75 29 49 8b 8c 24 58 02 00 00 <0f> b6 01 3c 7f 0f 84 15 04 00 00 c0 e8 05 83 e0 07 0f b6 80 40 78
RSP: 0018:ffffc90002edfaf0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8881281ce000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88810ebd7e40
RBP: ffff88812938c000 R08: ffff888127f53400 R09: 0000000000000000
R10: 0000000000000001 R11: 9296e02e597a92e7 R12: ffff888127f53400
R13: ffff888129390180 R14: ffffc90002edfba0 R15: 0000000000000000
FS:  00007f4964400700(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010e33d000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400