From: syzbot <syzbot+00ed1cf405874e141432@syzkaller.appspotmail.com>
To: b.zolnierkie@samsung.com, dri-devel@lists.freedesktop.org,
linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: BUG: unable to handle kernel paging request in bitfill_aligned
Date: Tue, 12 May 2020 06:55:16 +0000 [thread overview]
Message-ID: <00000000000029b38c05a56df2b0@google.com> (raw)
In-Reply-To: <CA+ydwtrmj_nXc3KNLW3YCE4BU_dOZnWRhkAC7wTXmrj5dXz6_Q@mail.gmail.com>
Hello,
syzbot found the following crash on:
HEAD commit: 1d3962ae Merge tag 'io_uring-5.7-2020-05-08' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x\x14874258100000
kernel config: https://syzkaller.appspot.com/x/.config?x°212dbee046bc1f
dashboard link: https://syzkaller.appspot.com/bug?extid\0ed1cf405874e141432
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+00ed1cf405874e141432@syzkaller.appspotmail.com
BUG: unable to handle page fault for address: ffff888000cf5080
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD d401067 P4D d401067 PUD d402067 PMD cf4063 PTE 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 30473 Comm: syz-executor.4 Not tainted 5.7.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__writeq arch/x86/include/asm/io.h:98 [inline]
RIP: 0010:bitfill_aligned drivers/video/fbdev/core/cfbfillrect.c:64 [inline]
RIP: 0010:bitfill_aligned+0xfc/0x200 drivers/video/fbdev/core/cfbfillrect.c:35
Code: fd 44 89 e0 31 d2 bf 07 00 00 00 f7 f5 41 89 c4 89 c6 89 c5 e8 c5 ab b3 fd 41 83 fc 07 76 62 45 89 e7 4c 89 ed e8 44 aa b3 fd <48> 89 5d 00 48 89 5d 08 48 89 5d 10 48 89 5d 18 48 89 5d 20 48 89
RSP: 0018:ffffc90001c474e0 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90012324000
RDX: 0000000000040000 RSI: ffffffff83bf846c RDI: 0000000000000005
RBP: ffff888000cf5080 R08: ffff888056a6a340 R09: 0000000000000040
R10: ffff888218d3331f R11: ffffed10431a6663 R12: 0000000000000030
R13: ffff888000cf5080 R14: 0000000000000000 R15: 0000000000000030
FS: 00007fe0d9986700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888000cf5080 CR3: 000000008ea77000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
cfb_fillrect+0x418/0x7a0 drivers/video/fbdev/core/cfbfillrect.c:327
vga16fb_fillrect+0x68f/0x1960 drivers/video/fbdev/vga16fb.c:951
bit_clear_margins+0x2d5/0x4a0 drivers/video/fbdev/core/bitblit.c:232
fbcon_clear_margins+0x1de/0x240 drivers/video/fbdev/core/fbcon.c:1381
fbcon_switch+0xcde/0x16f0 drivers/video/fbdev/core/fbcon.c:2363
redraw_screen+0x2ae/0x770 drivers/tty/vt/vt.c:1015
fbcon_modechanged+0x581/0x720 drivers/video/fbdev/core/fbcon.c:3000
fbcon_update_vcs+0x3a/0x50 drivers/video/fbdev/core/fbcon.c:3047
fb_set_var+0xad0/0xd40 drivers/video/fbdev/core/fbmem.c:1056
do_fb_ioctl+0x390/0x6e0 drivers/video/fbdev/core/fbmem.c:1109
fb_ioctl+0xdd/0x130 drivers/video/fbdev/core/fbmem.c:1185
vfs_ioctl fs/ioctl.c:47 [inline]
ksys_ioctl+0x11a/0x180 fs/ioctl.c:771
__do_sys_ioctl fs/ioctl.c:780 [inline]
__se_sys_ioctl fs/ioctl.c:778 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c829
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe0d9985c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e4860 RCX: 000000000045c829
RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000002f2 R14: 00000000004c54c8 R15: 00007fe0d99866d4
Modules linked in:
CR2: ffff888000cf5080
===========================
---
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.
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next prev parent reply other threads:[~2020-05-12 6:55 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-19 17:33 BUG: unable to handle kernel paging request at ffffc90000669000, IP: [<ffffffff8139d84a>] bitfill_un Tommi Rantala
2019-12-10 16:38 ` BUG: unable to handle kernel paging request in sys_imageblit syzbot
2020-06-19 4:56 ` syzbot
2019-12-27 7:13 ` BUG: unable to handle kernel paging request in vga16fb_imageblit syzbot
2020-05-08 7:07 ` BUG: unable to handle kernel paging request in vga16fb_imageblit (2) syzbot
2021-05-01 20:31 ` [syzbot] " syzbot
2021-05-02 1:53 ` 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
2020-05-12 6:55 ` syzbot [this message]
2020-10-06 8:18 ` BUG: unable to handle kernel paging request in cfb_imageblit syzbot
2020-12-18 15:26 ` syzbot
2020-12-18 15:27 ` Dmitry Vyukov
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