From: Stephen Rothwell <sfr@canb.auug.org.au>
To: syzbot <syzbot+878f276b4892a4438f95@syzkaller.appspotmail.com>
Cc: adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-next@vger.kernel.org,
syzkaller-bugs@googlegroups.com, tytso@mit.edu
Subject: Re: linux-next test error: BUG: using smp_processor_id() in preemptible [ADDR] code: syz-fuzzer/6793
Date: Mon, 8 Jun 2020 00:26:32 +1000 [thread overview]
Message-ID: <20200608002632.392b79b1@canb.auug.org.au> (raw)
In-Reply-To: <000000000000872ad205a77c947c@google.com>
[-- Attachment #1: Type: text/plain, Size: 2767 bytes --]
Hi syzbot,
On Sun, 07 Jun 2020 04:13:13 -0700 syzbot <syzbot+878f276b4892a4438f95@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: 48f99181 Add linux-next specific files for 20200603
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=1006bca6100000
> kernel config: https://syzkaller.appspot.com/x/.config?x=365f706273eaf502
> dashboard link: https://syzkaller.appspot.com/bug?extid=878f276b4892a4438f95
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+878f276b4892a4438f95@syzkaller.appspotmail.com
>
> BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6793
> caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
> CPU: 1 PID: 6793 Comm: syz-fuzzer Not tainted 5.7.0-next-20200603-syzkaller #0
> 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+0x18f/0x20d lib/dump_stack.c:118
> check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
> ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
> ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
> ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
> ext4_getblk+0xad/0x520 fs/ext4/inode.c:833
> ext4_bread+0x7c/0x380 fs/ext4/inode.c:883
> ext4_append+0x153/0x360 fs/ext4/namei.c:67
> ext4_init_new_dir fs/ext4/namei.c:2757 [inline]
> ext4_mkdir+0x5e0/0xdf0 fs/ext4/namei.c:2802
> vfs_mkdir+0x419/0x690 fs/namei.c:3632
> do_mkdirat+0x21e/0x280 fs/namei.c:3655
> do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
> entry_SYSCALL_64_after_hwframe+0x44/0xa9
> RIP: 0033:0x4b02a0
> Code: Bad RIP value.
> RSP: 002b:000000c00004f4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102
> RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0
> RDX: 00000000000001c0 RSI: 000000c000026960 RDI: ffffffffffffff9c
> RBP: 000000c00004f510 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff
> R13: 000000000000004c R14: 000000000000004b R15: 0000000000000100
>
>
> ---
> 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#status for how to communicate with syzbot.
#syz dup: linux-next test error: BUG: using smp_processor_id() in preemptible [ADDR] code: syz-fuzzer/6792
--
Cheers,
Stephen Rothwell
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
prev parent reply other threads:[~2020-06-07 14:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-07 11:13 linux-next test error: BUG: using smp_processor_id() in preemptible [ADDR] code: syz-fuzzer/6793 syzbot
2020-06-07 14:26 ` Stephen Rothwell [this message]
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=20200608002632.392b79b1@canb.auug.org.au \
--to=sfr@canb.auug.org.au \
--cc=adilger.kernel@dilger.ca \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-next@vger.kernel.org \
--cc=syzbot+878f276b4892a4438f95@syzkaller.appspotmail.com \
--cc=syzkaller-bugs@googlegroups.com \
--cc=tytso@mit.edu \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox