From: syzbot <syzbot+1f29e126cf461c4de3b3@syzkaller.appspotmail.com>
To: b.zolnierkie@samsung.com, colin.king@canonical.com,
daniel.vetter@ffwll.ch, dri-devel@lists.freedesktop.org,
gregkh@linuxfoundation.org, jani.nikula@intel.com,
linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org,
penguin-kernel@i-love.sakura.ne.jp,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] BUG: unable to handle kernel paging request in vga16fb_imageblit (2)
Date: Sat, 01 May 2021 13:31:16 -0700 [thread overview]
Message-ID: <000000000000373dd005c14a9c72@google.com> (raw)
In-Reply-To: <00000000000086452c05a51da504@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: d2b6f8a1 Merge tag 'xfs-5.13-merge-3' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11d80be1d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=53fdf14defd48c56
dashboard link: https://syzkaller.appspot.com/bug?extid=1f29e126cf461c4de3b3
compiler: Debian clang version 11.0.1-2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d9ff43d00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10981693d00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1f29e126cf461c4de3b3@syzkaller.appspotmail.com
BUG: unable to handle page fault for address: ffff888001000040
#PF: supervisor write access in kernel mode
#PF: error_code(0x0003) - permissions violation
PGD 11201067 P4D 11201067 PUD 11202067 PMD 80000000010001e1
Oops: 0003 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8403 Comm: syz-executor112 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline]
RIP: 0010:vga16fb_imageblit+0xcee/0x1cb0 drivers/video/fbdev/vga16fb.c:1260
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 90 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 1b 41 0f b6 04 24 <41> 88 06 85 ed 74 2b 49 ff c4 49 ff c6 e8 80 ae 43 fd ff cd eb cc
RSP: 0018:ffffc9000163f0a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888001000040 RCX: dffffc0000000000
RDX: ffff888022ad54c0 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff843b289b R09: 0000000000000000
R10: 0000000000000002 R11: ffff888022ad54c0 R12: ffff8880181bcea8
R13: ffffc9000163f2cc R14: ffff888001000040 R15: 0000000000000004
FS: 0000000001207300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000040 CR3: 0000000028d32000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bit_putcs+0x18e8/0x1de0 drivers/video/fbdev/core/bitblit.c:105
fbcon_putcs+0x2ae/0x430 drivers/video/fbdev/core/fbcon.c:1296
do_update_region+0x4d6/0x6a0 drivers/tty/vt/vt.c:676
redraw_screen+0x8f6/0x1270 drivers/tty/vt/vt.c:1035
fbcon_blank+0x556/0xa50 drivers/video/fbdev/core/fbcon.c:2207
do_unblank_screen+0x27e/0xb20 drivers/tty/vt/vt.c:4406
vt_kdsetmode drivers/tty/vt/vt_ioctl.c:276 [inline]
vt_k_ioctl drivers/tty/vt/vt_ioctl.c:381 [inline]
vt_ioctl+0x2a82/0x3180 drivers/tty/vt/vt_ioctl.c:713
tty_ioctl+0xf51/0x1720 drivers/tty/tty_io.c:2805
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:1069 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:1055
do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x43fef9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc931a4c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000013f84 RCX: 000000000043fef9
RDX: 0000000000000000 RSI: 0000000000004b3a RDI: 0000000000000003
RBP: 0000000000000000 R08: 000000000000000d R09: 00007ffc931a4de8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc931a4c5c
R13: 431bde82d7b634db R14: 00000000004ae018 R15: 0000000000400488
Modules linked in:
CR2: ffff888001000040
---[ end trace 96734cf7ef5cce91 ]---
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline]
RIP: 0010:vga16fb_imageblit+0xcee/0x1cb0 drivers/video/fbdev/vga16fb.c:1260
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 90 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 1b 41 0f b6 04 24 <41> 88 06 85 ed 74 2b 49 ff c4 49 ff c6 e8 80 ae 43 fd ff cd eb cc
RSP: 0018:ffffc9000163f0a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888001000040 RCX: dffffc0000000000
RDX: ffff888022ad54c0 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff843b289b R09: 0000000000000000
R10: 0000000000000002 R11: ffff888022ad54c0 R12: ffff8880181bcea8
R13: ffffc9000163f2cc R14: ffff888001000040 R15: 0000000000000004
FS: 0000000001207300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000040 CR3: 0000000028d32000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2021-05-02 7:19 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 7:07 BUG: unable to handle kernel paging request in vga16fb_imageblit (2) syzbot
2021-05-01 20:31 ` syzbot [this message]
2021-05-02 1:53 ` [syzbot] " syzbot
2021-05-03 13:41 ` Tetsuo Handa
2021-05-07 11:09 ` Tetsuo Handa
2021-05-14 16:19 ` [PATCH] video: fbdev: vga16fb: fix OOB write in vga16fb_imageblit() Tetsuo Handa
2021-05-14 17:29 ` Linus Torvalds
2021-05-14 17:37 ` Linus Torvalds
2021-05-14 18:23 ` Linus Torvalds
2021-05-14 20:25 ` Maciej W. Rozycki
2021-05-14 20:32 ` Linus Torvalds
2021-05-14 21:10 ` Linus Torvalds
2021-05-15 7:43 ` [PATCH v2] tty: vt: always invoke vc->vc_sw->con_resize callback Tetsuo Handa
2021-05-15 16:21 ` Maciej W. Rozycki
2021-05-15 16:32 ` Maciej W. Rozycki
2021-05-15 16:41 ` Linus Torvalds
2021-05-17 13:13 ` Daniel Vetter
2021-05-15 16:11 ` [PATCH] video: fbdev: vga16fb: fix OOB write in vga16fb_imageblit() Maciej W. Rozycki
2021-05-17 13:07 ` Daniel Vetter
2021-05-17 13:10 ` Daniel Vetter
2021-05-15 0:45 ` Tetsuo Handa
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=000000000000373dd005c14a9c72@google.com \
--to=syzbot+1f29e126cf461c4de3b3@syzkaller.appspotmail.com \
--cc=b.zolnierkie@samsung.com \
--cc=colin.king@canonical.com \
--cc=daniel.vetter@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=gregkh@linuxfoundation.org \
--cc=jani.nikula@intel.com \
--cc=linux-fbdev@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=penguin-kernel@i-love.sakura.ne.jp \
--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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).