[syzbot] general protection fault in __blk_rq_map_sg

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Hello,

syzbot found the following issue on:

HEAD commit:    80bd9028feca Add linux-next specific files for 20230131
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17126969480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=904dc2f450eaad4a
dashboard link: https://syzkaller.appspot.com/bug?extid=0bbf896c8341c8e137c2
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1534e75d480000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/924618188238/disk-80bd9028.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/7a03cf86e545/vmlinux-80bd9028.xz
kernel image: https://storage.googleapis.com/syzbot-assets/568e80043a41/bzImage-80bd9028.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0bbf896c8341c8e137c2@xxxxxxxxxxxxxxxxxxxxxxxxx

general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 5252 Comm: syz-executor.2 Not tainted 6.2.0-rc6-next-20230131-syzkaller-09515-g80bd9028feca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:sg_assign_page include/linux/scatterlist.h:109 [inline]
RIP: 0010:sg_set_page include/linux/scatterlist.h:139 [inline]
RIP: 0010:__blk_bvec_map_sg block/blk-merge.c:501 [inline]
RIP: 0010:__blk_bios_map_sg block/blk-merge.c:548 [inline]
RIP: 0010:__blk_rq_map_sg+0x36e/0xfd0 block/blk-merge.c:575
Code: 38 e8 36 5f 1a 00 48 89 c3 e8 9e 62 88 fd 48 8b 44 24 20 80 38 00 0f 85 fe 0b 00 00 48 8b 04 24 48 89 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f3 0b 00 00 4c 8b 74 24 30 31 ff 48 8b 2b 41
RSP: 0018:ffffc9000428edf8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888019293a80 RSI: ffffffff83fc5382 RDI: 0000000000000007
RBP: ffff888021114bb8 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000a00
FS:  00007f50df7a5700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f50df784718 CR3: 0000000077767000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 scsi_alloc_sgtables+0x236/0xf70 drivers/scsi/scsi_lib.c:1048
 sd_setup_read_write_cmnd drivers/scsi/sd.c:1136 [inline]
 sd_init_command+0x67a/0x32a0 drivers/scsi/sd.c:1260
 scsi_prepare_cmd drivers/scsi/scsi_lib.c:1603 [inline]
 scsi_queue_rq+0x1e7b/0x3a40 drivers/scsi/scsi_lib.c:1737
 blk_mq_dispatch_rq_list+0x710/0x23f0 block/blk-mq.c:2056
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:173 [inline]
 blk_mq_do_dispatch_sched+0x95e/0xc20 block/blk-mq-sched.c:187
 __blk_mq_sched_dispatch_requests+0x26d/0x3e0 block/blk-mq-sched.c:313
 blk_mq_sched_dispatch_requests+0x10a/0x190 block/blk-mq-sched.c:339
 __blk_mq_run_hw_queue+0x2b7/0x480 block/blk-mq.c:2174
 __blk_mq_delay_run_hw_queue+0x5f7/0x700 block/blk-mq.c:2250
 blk_mq_run_hw_queue+0x3b5/0x560 block/blk-mq.c:2298
 blk_mq_sched_insert_requests+0x1d9/0xb30 block/blk-mq-sched.c:493
 blk_mq_dispatch_plug_list block/blk-mq.c:2758 [inline]
 blk_mq_flush_plug_list+0x39c/0xe10 block/blk-mq.c:2800
 __blk_flush_plug block/blk-core.c:1150 [inline]
 blk_finish_plug block/blk-core.c:1174 [inline]
 blk_finish_plug+0xbb/0x170 block/blk-core.c:1171
 __iomap_dio_rw+0xf85/0x1d80 fs/iomap/direct-io.c:602
 iomap_dio_rw+0x40/0xa0 fs/iomap/direct-io.c:682
 ext4_dio_read_iter fs/ext4/file.c:94 [inline]
 ext4_file_read_iter+0x4be/0x690 fs/ext4/file.c:145
 call_read_iter include/linux/fs.h:1845 [inline]
 generic_file_splice_read+0x182/0x4b0 fs/splice.c:309
 do_splice_to+0x1b9/0x240 fs/splice.c:793
 splice_direct_to_actor+0x2ab/0x8a0 fs/splice.c:865
 do_splice_direct+0x1ab/0x280 fs/splice.c:974
 do_sendfile+0xb19/0x12c0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64 fs/read_write.c:1309 [inline]
 __x64_sys_sendfile64+0x1d0/0x210 fs/read_write.c:1309
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f50dea8c0c9
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:00007f50df7a5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f50debabf80 RCX: 00007f50dea8c0c9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00007f50deae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000001ff01 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffbb4e322f R14: 00007f50df7a5300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sg_assign_page include/linux/scatterlist.h:109 [inline]
RIP: 0010:sg_set_page include/linux/scatterlist.h:139 [inline]
RIP: 0010:__blk_bvec_map_sg block/blk-merge.c:501 [inline]
RIP: 0010:__blk_bios_map_sg block/blk-merge.c:548 [inline]
RIP: 0010:__blk_rq_map_sg+0x36e/0xfd0 block/blk-merge.c:575
Code: 38 e8 36 5f 1a 00 48 89 c3 e8 9e 62 88 fd 48 8b 44 24 20 80 38 00 0f 85 fe 0b 00 00 48 8b 04 24 48 89 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 f3 0b 00 00 4c 8b 74 24 30 31 ff 48 8b 2b 41
RSP: 0018:ffffc9000428edf8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888019293a80 RSI: ffffffff83fc5382 RDI: 0000000000000007
RBP: ffff888021114bb8 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000a00
FS:  00007f50df7a5700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdfee5f5d8 CR3: 0000000077767000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	38 e8                	cmp    %ch,%al
   2:	36 5f                	ss pop %rdi
   4:	1a 00                	sbb    (%rax),%al
   6:	48 89 c3             	mov    %rax,%rbx
   9:	e8 9e 62 88 fd       	callq  0xfd8862ac
   e:	48 8b 44 24 20       	mov    0x20(%rsp),%rax
  13:	80 38 00             	cmpb   $0x0,(%rax)
  16:	0f 85 fe 0b 00 00    	jne    0xc1a
  1c:	48 8b 04 24          	mov    (%rsp),%rax
  20:	48 89 18             	mov    %rbx,(%rax)
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	0f 85 f3 0b 00 00    	jne    0xc28
  35:	4c 8b 74 24 30       	mov    0x30(%rsp),%r14
  3a:	31 ff                	xor    %edi,%edi
  3c:	48 8b 2b             	mov    (%rbx),%rbp
  3f:	41                   	rex.B


---
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See https://goo.gl/tpsmEJ for more information about syzbot.
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