From: syzbot <syzbot+0bbf896c8341c8e137c2@syzkaller.appspotmail.com>
To: axboe@kernel.dk, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: [syzbot] general protection fault in __blk_rq_map_sg
Date: Sat, 04 Feb 2023 10:44:47 -0800 [thread overview]
Message-ID: <0000000000003b04d205f3e431d1@google.com> (raw)
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@syzkaller.appspotmail.com
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
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2023-02-04 18:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-04 18:44 syzbot [this message]
2023-02-04 23:12 ` [syzbot] general protection fault in __blk_rq_map_sg syzbot
[not found] <20230205123357.1610-1-hdanton@sina.com>
2023-02-05 13:11 ` syzbot
[not found] <20230205141722.1670-1-hdanton@sina.com>
2023-02-05 14:44 ` syzbot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=0000000000003b04d205f3e431d1@google.com \
--to=syzbot+0bbf896c8341c8e137c2@syzkaller.appspotmail.com \
--cc=axboe@kernel.dk \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.