From: syzbot <syzbot+21cfe1f803e0e158acf1@syzkaller.appspotmail.com>
To: axboe@kernel.dk, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: WARNING in generic_make_request_checks
Date: Wed, 08 Aug 2018 20:39:02 -0700 [thread overview]
Message-ID: <0000000000003c4e6d0572f85eb2@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: 60f5a2173632 Merge tag 'usercopy-fix-v4.18-rc8' of git://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15e200e2400000
kernel config: https://syzkaller.appspot.com/x/.config?x=2dc0cd7c2eefb46f
dashboard link: https://syzkaller.appspot.com/bug?extid=21cfe1f803e0e158acf1
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=17b87bfc400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=117ccc8c400000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+21cfe1f803e0e158acf1@syzkaller.appspotmail.com
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device loop0
(partno 0)
WARNING: CPU: 1 PID: 4396 at block/blk-core.c:2161 bio_check_ro
block/blk-core.c:2158 [inline]
WARNING: CPU: 1 PID: 4396 at block/blk-core.c:2161
generic_make_request_checks+0x1618/0x24a0 block/blk-core.c:2263
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 4396 Comm: syz-executor533 Not tainted 4.18.0-rc7+ #177
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
panic+0x238/0x4e7 kernel/panic.c:184
__warn.cold.8+0x163/0x1ba kernel/panic.c:536
report_bug+0x252/0x2d0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:bio_check_ro block/blk-core.c:2158 [inline]
RIP: 0010:generic_make_request_checks+0x1618/0x24a0 block/blk-core.c:2263
Code: 8d bd 78 ff ff ff 45 8b b6 d4 04 00 00 48 89 df 4c 89 fe e8 ea 54 07
00 44 89 f2 48 c7 c7 60 16 39 87 48 89 c6 e8 68 30 ff fd <0f> 0b e9 56 ed
ff ff 48 8b bd 50 fd ff ff e8 75 f3 71 fe e9 ca ea
RSP: 0018:ffff8801acc8f640 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8801ae5e0400 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81632481 RDI: 0000000000000001
RBP: ffff8801acc8f940 R08: ffff8801ace94500 R09: ffffed003b624fc0
R10: ffffed003b624fc0 R11: ffff8801db127e07 R12: ffff8801d3083140
R13: ffff8801ae5e0408 R14: 0000000000000000 R15: ffff8801acc8f8b8
generic_make_request+0x2aa/0x1800 block/blk-core.c:2387
submit_bio+0xba/0x460 block/blk-core.c:2552
submit_bio_wait+0x134/0x1e0 block/bio.c:1004
blkdev_issue_flush+0x204/0x300 block/blk-flush.c:553
blkdev_fsync+0x93/0xd0 fs/block_dev.c:633
vfs_fsync_range+0x140/0x220 fs/sync.c:197
vfs_fsync fs/sync.c:211 [inline]
do_fsync+0x52/0xa0 fs/sync.c:221
__do_sys_fsync fs/sync.c:229 [inline]
__se_sys_fsync fs/sync.c:227 [inline]
__x64_sys_fsync+0x33/0x40 fs/sync.c:227
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x444999
Code: e8 ec b2 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 bb d4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffdc1fbd458 EFLAGS: 00000213 ORIG_RAX: 000000000000004a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444999
RDX: 0000000000401430 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000021eb880 R09: 00000000000000c2
R10: 000000000000000f R11: 0000000000000213 R12: 00000000000074ed
R13: 0000000000402370 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2018-08-09 3:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-09 3:39 syzbot [this message]
2019-11-22 12:05 ` WARNING in generic_make_request_checks syzbot
2019-11-27 4:54 ` Kees Cook
2019-11-27 7:45 ` syzbot
2019-11-27 19:26 ` Kees Cook
2019-11-28 8:52 ` Dmitry Vyukov
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=0000000000003c4e6d0572f85eb2@google.com \
--to=syzbot+21cfe1f803e0e158acf1@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.