From: syzbot <syzbot+d273f7d7f58afd93be48@syzkaller.appspotmail.com>
To: jack@suse.com, linux-ext4@vger.kernel.org,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: [syzbot] WARNING in ext2_get_group_desc
Date: Thu, 21 Jul 2022 01:16:20 -0700 [thread overview]
Message-ID: <00000000000028796b05e44c55e9@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: c658cabbfd32 Merge tag 's390-5.19-6' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=149c07d0080000
kernel config: https://syzkaller.appspot.com/x/.config?x=cf350e66d4493550
dashboard link: https://syzkaller.appspot.com/bug?extid=d273f7d7f58afd93be48
compiler: arm-linux-gnueabi-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d273f7d7f58afd93be48@syzkaller.appspotmail.com
loop1: detected capacity change from 0 to 20
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3999 at fs/ext2/balloc.c:51 ext2_get_group_desc+0x88/0xb4 fs/ext2/balloc.c:51
block_group >= groups_count - block_group = 1, groups_count = 1
Modules linked in:
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 3999 Comm: syz-executor.1 Not tainted 5.19.0-rc6-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace:
[<816f379c>] (dump_backtrace) from [<816f3acc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:253)
r7:81d72500 r6:82422fec r5:60000093 r4:81d80550
[<816f3ab4>] (show_stack) from [<816fc3f8>] (__dump_stack lib/dump_stack.c:88 [inline])
[<816f3ab4>] (show_stack) from [<816fc3f8>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<816fc3b0>] (dump_stack_lvl) from [<816fc41c>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
r5:00000000 r4:82642d14
[<816fc404>] (dump_stack) from [<816f4668>] (panic+0x11c/0x360 kernel/panic.c:274)
[<816f454c>] (panic) from [<80242a2c>] (__warn+0x98/0x198 kernel/panic.c:623)
r3:00000001 r2:00000000 r1:00000000 r0:81d72500
r7:806112e0
[<80242994>] (__warn) from [<816f4948>] (warn_slowpath_fmt+0x9c/0xd4 kernel/panic.c:653)
r8:00000009 r7:806112e0 r6:00000033 r5:81db0ac4 r4:81db0a80
[<816f48b0>] (warn_slowpath_fmt) from [<806112e0>] (ext2_get_group_desc+0x88/0xb4 fs/ext2/balloc.c:51)
r8:00000001 r7:851d1c00 r6:ee24dde0 r5:851d1c00 r4:00000000
[<80611258>] (ext2_get_group_desc) from [<80615118>] (ext2_get_inode+0x94/0x134 fs/ext2/inode.c:1345)
r4:00000002
[<80615084>] (ext2_get_inode) from [<80617194>] (ext2_iget+0x84/0x438 fs/ext2/inode.c:1425)
r9:88485670 r8:00000000 r7:851d1c00 r6:00000002 r5:00000000 r4:8497b6f8
[<80617110>] (ext2_iget) from [<8061a940>] (ext2_fill_super+0xb30/0xe14 fs/ext2/super.c:1162)
r8:00000000 r7:84af7600 r6:88307400 r5:851d1c00 r4:88485600
[<80619e10>] (ext2_fill_super) from [<8049e2a0>] (mount_bdev+0x178/0x1a4 fs/super.c:1367)
r10:852b4000 r9:83917dbc r8:00000083 r7:852b4000 r6:00000000 r5:851d1c00
r4:83917b80
[<8049e128>] (mount_bdev) from [<806189ac>] (ext2_mount+0x20/0x28 fs/ext2/super.c:1465)
r9:86184b80 r8:86184200 r7:ee24df6c r6:00000020 r5:8061898c r4:85352f00
[<8061898c>] (ext2_mount) from [<804de934>] (legacy_get_tree+0x2c/0x50 fs/fs_context.c:610)
[<804de908>] (legacy_get_tree) from [<8049c85c>] (vfs_get_tree+0x2c/0x108 fs/super.c:1497)
r5:85352f00 r4:85352f00
[<8049c830>] (vfs_get_tree) from [<804c5818>] (do_new_mount fs/namespace.c:3040 [inline])
[<8049c830>] (vfs_get_tree) from [<804c5818>] (path_mount+0x3e8/0xabc fs/namespace.c:3370)
r6:00000020 r5:00000000 r4:85352f00
[<804c5430>] (path_mount) from [<804c6428>] (do_mount fs/namespace.c:3383 [inline])
[<804c5430>] (path_mount) from [<804c6428>] (__do_sys_mount fs/namespace.c:3591 [inline])
[<804c5430>] (path_mount) from [<804c6428>] (sys_mount+0x118/0x220 fs/namespace.c:3568)
r10:00000000 r9:76f05ef8 r8:00000000 r7:00000000 r6:852b4000 r5:86184200
r4:86184b80
[<804c6310>] (sys_mount) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64)
Exception stack(0xee24dfa8 to 0xee24dff0)
dfa0: 76f05ef8 20000000 76f05eb8 20000240 20000000 00000000
dfc0: 76f05ef8 20000000 20000340 00000015 76f05eb8 00000000 76f05eb8 00000000
dfe0: 000862b8 76f05e70 00016a48 0004d500
r10:00000015 r9:84f38bc0 r8:80200288 r7:00000015 r6:20000340 r5:20000000
r4:76f05ef8
Rebooting in 86400 seconds..
---
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.
reply other threads:[~2022-07-21 8:16 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=00000000000028796b05e44c55e9@google.com \
--to=syzbot+d273f7d7f58afd93be48@syzkaller.appspotmail.com \
--cc=jack@suse.com \
--cc=linux-ext4@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.