* KASAN: global-out-of-bounds Read in fb_pad_aligned_buffer
@ 2019-12-07 21:58 ` syzbot
0 siblings, 0 replies; 9+ messages in thread
From: syzbot @ 2019-12-07 21:58 UTC (permalink / raw)
To: b.zolnierkie, daniel.vetter, dri-devel, kraxel, linux-fbdev,
linux-kernel, maarten.lankhorst, peda, sam, syzkaller-bugs
Hello,
syzbot found the following crash on:
HEAD commit: ad910e36 pipe: fix poll/select race introduced by the pipe..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15483196e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=318fa2bff8166d0d
dashboard link: https://syzkaller.appspot.com/bug?extid=0568d05e486eee0a1ba2
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+0568d05e486eee0a1ba2@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer
include/linux/fb.h:655 [inline]
BUG: KASAN: global-out-of-bounds in fb_pad_aligned_buffer+0x138/0x160
drivers/video/fbdev/core/fbmem.c:115
Read of size 1 at addr ffffffff887274d4 by task syz-executor.2/19900
CPU: 1 PID: 19900 Comm: syz-executor.2 Not tainted 5.4.0-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+0x197/0x210 lib/dump_stack.c:118
print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:639
__asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:132
__fb_pad_aligned_buffer include/linux/fb.h:655 [inline]
fb_pad_aligned_buffer+0x138/0x160 drivers/video/fbdev/core/fbmem.c:115
bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:99 [inline]
bit_putcs+0xd14/0xf10 drivers/video/fbdev/core/bitblit.c:185
fbcon_putcs+0x33c/0x3e0 drivers/video/fbdev/core/fbcon.c:1353
do_update_region+0x42b/0x6f0 drivers/tty/vt/vt.c:677
redraw_screen+0x676/0x7d0 drivers/tty/vt/vt.c:1011
fbcon_do_set_font+0x829/0x960 drivers/video/fbdev/core/fbcon.c:2605
fbcon_copy_font+0x12c/0x190 drivers/video/fbdev/core/fbcon.c:2620
con_font_copy drivers/tty/vt/vt.c:4594 [inline]
con_font_op+0x6b2/0x1270 drivers/tty/vt/vt.c:4609
vt_ioctl+0x181a/0x26d0 drivers/tty/vt/vt_ioctl.c:965
tty_ioctl+0xa37/0x14f0 drivers/tty/tty_io.c:2660
vfs_ioctl fs/ioctl.c:47 [inline]
file_ioctl fs/ioctl.c:545 [inline]
do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732
ksys_ioctl+0xab/0xd0 fs/ioctl.c:749
__do_sys_ioctl fs/ioctl.c:756 [inline]
__se_sys_ioctl fs/ioctl.c:754 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a6f9
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe2b58b1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a6f9
RDX: 0000000020000000 RSI: 0000000000004b72 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe2b58b26d4
R13: 00000000004c382b R14: 00000000004d8d78 R15: 00000000ffffffff
The buggy address belongs to the variable:
fontdata_8x16+0x1054/0x1120
Memory state around the buggy address:
ffffffff88727380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffffff88727400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ffffffff88727480: fa fa fa fa 06 fa fa fa fa fa fa fa 05 fa fa fa
^
ffffffff88727500: fa fa fa fa 06 fa fa fa fa fa fa fa 00 00 03 fa
ffffffff88727580: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
---
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.
^ permalink raw reply [flat|nested] 9+ messages in thread
* KASAN: global-out-of-bounds Read in fb_pad_aligned_buffer
@ 2019-12-07 21:58 ` syzbot
0 siblings, 0 replies; 9+ messages in thread
From: syzbot @ 2019-12-07 21:58 UTC (permalink / raw)
To: b.zolnierkie, daniel.vetter, dri-devel, kraxel, linux-fbdev,
linux-kernel, maarten.lankhorst, peda, sam, syzkaller-bugs
Hello,
syzbot found the following crash on:
HEAD commit: ad910e36 pipe: fix poll/select race introduced by the pipe..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x\x15483196e00000
kernel config: https://syzkaller.appspot.com/x/.config?x18fa2bff8166d0d
dashboard link: https://syzkaller.appspot.com/bug?extid\x0568d05e486eee0a1ba2
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+0568d05e486eee0a1ba2@syzkaller.appspotmail.com
=================================
BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer
include/linux/fb.h:655 [inline]
BUG: KASAN: global-out-of-bounds in fb_pad_aligned_buffer+0x138/0x160
drivers/video/fbdev/core/fbmem.c:115
Read of size 1 at addr ffffffff887274d4 by task syz-executor.2/19900
CPU: 1 PID: 19900 Comm: syz-executor.2 Not tainted 5.4.0-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+0x197/0x210 lib/dump_stack.c:118
print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:639
__asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:132
__fb_pad_aligned_buffer include/linux/fb.h:655 [inline]
fb_pad_aligned_buffer+0x138/0x160 drivers/video/fbdev/core/fbmem.c:115
bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:99 [inline]
bit_putcs+0xd14/0xf10 drivers/video/fbdev/core/bitblit.c:185
fbcon_putcs+0x33c/0x3e0 drivers/video/fbdev/core/fbcon.c:1353
do_update_region+0x42b/0x6f0 drivers/tty/vt/vt.c:677
redraw_screen+0x676/0x7d0 drivers/tty/vt/vt.c:1011
fbcon_do_set_font+0x829/0x960 drivers/video/fbdev/core/fbcon.c:2605
fbcon_copy_font+0x12c/0x190 drivers/video/fbdev/core/fbcon.c:2620
con_font_copy drivers/tty/vt/vt.c:4594 [inline]
con_font_op+0x6b2/0x1270 drivers/tty/vt/vt.c:4609
vt_ioctl+0x181a/0x26d0 drivers/tty/vt/vt_ioctl.c:965
tty_ioctl+0xa37/0x14f0 drivers/tty/tty_io.c:2660
vfs_ioctl fs/ioctl.c:47 [inline]
file_ioctl fs/ioctl.c:545 [inline]
do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732
ksys_ioctl+0xab/0xd0 fs/ioctl.c:749
__do_sys_ioctl fs/ioctl.c:756 [inline]
__se_sys_ioctl fs/ioctl.c:754 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a6f9
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe2b58b1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a6f9
RDX: 0000000020000000 RSI: 0000000000004b72 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe2b58b26d4
R13: 00000000004c382b R14: 00000000004d8d78 R15: 00000000ffffffff
The buggy address belongs to the variable:
fontdata_8x16+0x1054/0x1120
Memory state around the buggy address:
ffffffff88727380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffffff88727400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ffffffff88727480: fa fa fa fa 06 fa fa fa fa fa fa fa 05 fa fa fa
^
ffffffff88727500: fa fa fa fa 06 fa fa fa fa fa fa fa 00 00 03 fa
ffffffff88727580: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
=================================
---
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.
^ permalink raw reply [flat|nested] 9+ messages in thread
* KASAN: global-out-of-bounds Read in fb_pad_aligned_buffer
@ 2019-12-07 21:58 ` syzbot
0 siblings, 0 replies; 9+ messages in thread
From: syzbot @ 2019-12-07 21:58 UTC (permalink / raw)
To: b.zolnierkie, daniel.vetter, dri-devel, kraxel, linux-fbdev,
linux-kernel, maarten.lankhorst, peda, sam, syzkaller-bugs
Hello,
syzbot found the following crash on:
HEAD commit: ad910e36 pipe: fix poll/select race introduced by the pipe..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15483196e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=318fa2bff8166d0d
dashboard link: https://syzkaller.appspot.com/bug?extid=0568d05e486eee0a1ba2
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+0568d05e486eee0a1ba2@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer
include/linux/fb.h:655 [inline]
BUG: KASAN: global-out-of-bounds in fb_pad_aligned_buffer+0x138/0x160
drivers/video/fbdev/core/fbmem.c:115
Read of size 1 at addr ffffffff887274d4 by task syz-executor.2/19900
CPU: 1 PID: 19900 Comm: syz-executor.2 Not tainted 5.4.0-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+0x197/0x210 lib/dump_stack.c:118
print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:639
__asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:132
__fb_pad_aligned_buffer include/linux/fb.h:655 [inline]
fb_pad_aligned_buffer+0x138/0x160 drivers/video/fbdev/core/fbmem.c:115
bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:99 [inline]
bit_putcs+0xd14/0xf10 drivers/video/fbdev/core/bitblit.c:185
fbcon_putcs+0x33c/0x3e0 drivers/video/fbdev/core/fbcon.c:1353
do_update_region+0x42b/0x6f0 drivers/tty/vt/vt.c:677
redraw_screen+0x676/0x7d0 drivers/tty/vt/vt.c:1011
fbcon_do_set_font+0x829/0x960 drivers/video/fbdev/core/fbcon.c:2605
fbcon_copy_font+0x12c/0x190 drivers/video/fbdev/core/fbcon.c:2620
con_font_copy drivers/tty/vt/vt.c:4594 [inline]
con_font_op+0x6b2/0x1270 drivers/tty/vt/vt.c:4609
vt_ioctl+0x181a/0x26d0 drivers/tty/vt/vt_ioctl.c:965
tty_ioctl+0xa37/0x14f0 drivers/tty/tty_io.c:2660
vfs_ioctl fs/ioctl.c:47 [inline]
file_ioctl fs/ioctl.c:545 [inline]
do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732
ksys_ioctl+0xab/0xd0 fs/ioctl.c:749
__do_sys_ioctl fs/ioctl.c:756 [inline]
__se_sys_ioctl fs/ioctl.c:754 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a6f9
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe2b58b1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a6f9
RDX: 0000000020000000 RSI: 0000000000004b72 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe2b58b26d4
R13: 00000000004c382b R14: 00000000004d8d78 R15: 00000000ffffffff
The buggy address belongs to the variable:
fontdata_8x16+0x1054/0x1120
Memory state around the buggy address:
ffffffff88727380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffffff88727400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ffffffff88727480: fa fa fa fa 06 fa fa fa fa fa fa fa 05 fa fa fa
^
ffffffff88727500: fa fa fa fa 06 fa fa fa fa fa fa fa 00 00 03 fa
ffffffff88727580: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
---
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.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: KASAN: global-out-of-bounds Read in fb_pad_aligned_buffer
2019-12-07 21:58 ` syzbot
(?)
@ 2019-12-09 4:27 ` syzbot
-1 siblings, 0 replies; 9+ messages in thread
From: syzbot @ 2019-12-09 4:27 UTC (permalink / raw)
To: b.zolnierkie, daniel.vetter, dri-devel, kraxel, linux-fbdev,
linux-kernel, maarten.lankhorst, peda, sam, syzkaller-bugs
syzbot has found a reproducer for the following crash on:
HEAD commit: 9455d25f Merge tag 'ntb-5.5' of git://github.com/jonmason/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=171e09dae00000
kernel config: https://syzkaller.appspot.com/x/.config?x=7a3b8f5088d4043a
dashboard link: https://syzkaller.appspot.com/bug?extid=0568d05e486eee0a1ba2
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15ddeca6e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16df9e41e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0568d05e486eee0a1ba2@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer
include/linux/fb.h:655 [inline]
BUG: KASAN: global-out-of-bounds in fb_pad_aligned_buffer+0x138/0x160
drivers/video/fbdev/core/fbmem.c:115
Read of size 1 at addr ffffffff8872a77c by task syz-executor208/9953
CPU: 1 PID: 9953 Comm: syz-executor208 Not tainted 5.4.0-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+0x197/0x210 lib/dump_stack.c:118
print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:639
__asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:132
__fb_pad_aligned_buffer include/linux/fb.h:655 [inline]
fb_pad_aligned_buffer+0x138/0x160 drivers/video/fbdev/core/fbmem.c:115
bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:99 [inline]
bit_putcs+0xd14/0xf10 drivers/video/fbdev/core/bitblit.c:185
fbcon_putcs+0x33c/0x3e0 drivers/video/fbdev/core/fbcon.c:1353
do_update_region+0x42b/0x6f0 drivers/tty/vt/vt.c:677
redraw_screen+0x676/0x7d0 drivers/tty/vt/vt.c:1011
fbcon_do_set_font+0x829/0x960 drivers/video/fbdev/core/fbcon.c:2605
fbcon_copy_font+0x12c/0x190 drivers/video/fbdev/core/fbcon.c:2620
con_font_copy drivers/tty/vt/vt.c:4594 [inline]
con_font_op+0x6b2/0x1270 drivers/tty/vt/vt.c:4609
vt_ioctl+0x181a/0x26d0 drivers/tty/vt/vt_ioctl.c:965
tty_ioctl+0xa37/0x14f0 drivers/tty/tty_io.c:2660
vfs_ioctl fs/ioctl.c:47 [inline]
file_ioctl fs/ioctl.c:545 [inline]
do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732
ksys_ioctl+0xab/0xd0 fs/ioctl.c:749
__do_sys_ioctl fs/ioctl.c:756 [inline]
__se_sys_ioctl fs/ioctl.c:754 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440269
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff65832458 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269
RDX: 0000000020000000 RSI: 0000000000004b72 RDI: 0000000000000004
RBP: 00000000006cb018 R08: 000000000000000d R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b50
R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000
The buggy address belongs to the variable:
oid_index+0x93c/0xb80
Memory state around the buggy address:
ffffffff8872a600: 04 fa fa fa fa fa fa fa 00 01 fa fa fa fa fa fa
ffffffff8872a680: 04 fa fa fa fa fa fa fa 04 fa fa fa fa fa fa fa
> ffffffff8872a700: 07 fa fa fa fa fa fa fa 04 fa fa fa fa fa fa fa
^
ffffffff8872a780: 05 fa fa fa fa fa fa fa 01 fa fa fa fa fa fa fa
ffffffff8872a800: 00 00 02 fa fa fa fa fa 00 00 00 05 fa fa fa fa
==================================================================
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: KASAN: global-out-of-bounds Read in fb_pad_aligned_buffer
@ 2019-12-09 4:27 ` syzbot
0 siblings, 0 replies; 9+ messages in thread
From: syzbot @ 2019-12-09 4:27 UTC (permalink / raw)
To: b.zolnierkie, daniel.vetter, dri-devel, kraxel, linux-fbdev,
linux-kernel, maarten.lankhorst, peda, sam, syzkaller-bugs
syzbot has found a reproducer for the following crash on:
HEAD commit: 9455d25f Merge tag 'ntb-5.5' of git://github.com/jonmason/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x\x171e09dae00000
kernel config: https://syzkaller.appspot.com/x/.config?xz3b8f5088d4043a
dashboard link: https://syzkaller.appspot.com/bug?extid\x0568d05e486eee0a1ba2
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x\x15ddeca6e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x\x16df9e41e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0568d05e486eee0a1ba2@syzkaller.appspotmail.com
=================================
BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer
include/linux/fb.h:655 [inline]
BUG: KASAN: global-out-of-bounds in fb_pad_aligned_buffer+0x138/0x160
drivers/video/fbdev/core/fbmem.c:115
Read of size 1 at addr ffffffff8872a77c by task syz-executor208/9953
CPU: 1 PID: 9953 Comm: syz-executor208 Not tainted 5.4.0-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+0x197/0x210 lib/dump_stack.c:118
print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:639
__asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:132
__fb_pad_aligned_buffer include/linux/fb.h:655 [inline]
fb_pad_aligned_buffer+0x138/0x160 drivers/video/fbdev/core/fbmem.c:115
bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:99 [inline]
bit_putcs+0xd14/0xf10 drivers/video/fbdev/core/bitblit.c:185
fbcon_putcs+0x33c/0x3e0 drivers/video/fbdev/core/fbcon.c:1353
do_update_region+0x42b/0x6f0 drivers/tty/vt/vt.c:677
redraw_screen+0x676/0x7d0 drivers/tty/vt/vt.c:1011
fbcon_do_set_font+0x829/0x960 drivers/video/fbdev/core/fbcon.c:2605
fbcon_copy_font+0x12c/0x190 drivers/video/fbdev/core/fbcon.c:2620
con_font_copy drivers/tty/vt/vt.c:4594 [inline]
con_font_op+0x6b2/0x1270 drivers/tty/vt/vt.c:4609
vt_ioctl+0x181a/0x26d0 drivers/tty/vt/vt_ioctl.c:965
tty_ioctl+0xa37/0x14f0 drivers/tty/tty_io.c:2660
vfs_ioctl fs/ioctl.c:47 [inline]
file_ioctl fs/ioctl.c:545 [inline]
do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732
ksys_ioctl+0xab/0xd0 fs/ioctl.c:749
__do_sys_ioctl fs/ioctl.c:756 [inline]
__se_sys_ioctl fs/ioctl.c:754 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440269
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff65832458 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269
RDX: 0000000020000000 RSI: 0000000000004b72 RDI: 0000000000000004
RBP: 00000000006cb018 R08: 000000000000000d R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b50
R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000
The buggy address belongs to the variable:
oid_index+0x93c/0xb80
Memory state around the buggy address:
ffffffff8872a600: 04 fa fa fa fa fa fa fa 00 01 fa fa fa fa fa fa
ffffffff8872a680: 04 fa fa fa fa fa fa fa 04 fa fa fa fa fa fa fa
> ffffffff8872a700: 07 fa fa fa fa fa fa fa 04 fa fa fa fa fa fa fa
^
ffffffff8872a780: 05 fa fa fa fa fa fa fa 01 fa fa fa fa fa fa fa
ffffffff8872a800: 00 00 02 fa fa fa fa fa 00 00 00 05 fa fa fa fa
=================================
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: KASAN: global-out-of-bounds Read in fb_pad_aligned_buffer
@ 2019-12-09 4:27 ` syzbot
0 siblings, 0 replies; 9+ messages in thread
From: syzbot @ 2019-12-09 4:27 UTC (permalink / raw)
To: b.zolnierkie, daniel.vetter, dri-devel, kraxel, linux-fbdev,
linux-kernel, maarten.lankhorst, peda, sam, syzkaller-bugs
syzbot has found a reproducer for the following crash on:
HEAD commit: 9455d25f Merge tag 'ntb-5.5' of git://github.com/jonmason/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=171e09dae00000
kernel config: https://syzkaller.appspot.com/x/.config?x=7a3b8f5088d4043a
dashboard link: https://syzkaller.appspot.com/bug?extid=0568d05e486eee0a1ba2
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15ddeca6e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16df9e41e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0568d05e486eee0a1ba2@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer
include/linux/fb.h:655 [inline]
BUG: KASAN: global-out-of-bounds in fb_pad_aligned_buffer+0x138/0x160
drivers/video/fbdev/core/fbmem.c:115
Read of size 1 at addr ffffffff8872a77c by task syz-executor208/9953
CPU: 1 PID: 9953 Comm: syz-executor208 Not tainted 5.4.0-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+0x197/0x210 lib/dump_stack.c:118
print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:639
__asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:132
__fb_pad_aligned_buffer include/linux/fb.h:655 [inline]
fb_pad_aligned_buffer+0x138/0x160 drivers/video/fbdev/core/fbmem.c:115
bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:99 [inline]
bit_putcs+0xd14/0xf10 drivers/video/fbdev/core/bitblit.c:185
fbcon_putcs+0x33c/0x3e0 drivers/video/fbdev/core/fbcon.c:1353
do_update_region+0x42b/0x6f0 drivers/tty/vt/vt.c:677
redraw_screen+0x676/0x7d0 drivers/tty/vt/vt.c:1011
fbcon_do_set_font+0x829/0x960 drivers/video/fbdev/core/fbcon.c:2605
fbcon_copy_font+0x12c/0x190 drivers/video/fbdev/core/fbcon.c:2620
con_font_copy drivers/tty/vt/vt.c:4594 [inline]
con_font_op+0x6b2/0x1270 drivers/tty/vt/vt.c:4609
vt_ioctl+0x181a/0x26d0 drivers/tty/vt/vt_ioctl.c:965
tty_ioctl+0xa37/0x14f0 drivers/tty/tty_io.c:2660
vfs_ioctl fs/ioctl.c:47 [inline]
file_ioctl fs/ioctl.c:545 [inline]
do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732
ksys_ioctl+0xab/0xd0 fs/ioctl.c:749
__do_sys_ioctl fs/ioctl.c:756 [inline]
__se_sys_ioctl fs/ioctl.c:754 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754
do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440269
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff65832458 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440269
RDX: 0000000020000000 RSI: 0000000000004b72 RDI: 0000000000000004
RBP: 00000000006cb018 R08: 000000000000000d R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b50
R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000
The buggy address belongs to the variable:
oid_index+0x93c/0xb80
Memory state around the buggy address:
ffffffff8872a600: 04 fa fa fa fa fa fa fa 00 01 fa fa fa fa fa fa
ffffffff8872a680: 04 fa fa fa fa fa fa fa 04 fa fa fa fa fa fa fa
> ffffffff8872a700: 07 fa fa fa fa fa fa fa 04 fa fa fa fa fa fa fa
^
ffffffff8872a780: 05 fa fa fa fa fa fa fa 01 fa fa fa fa fa fa fa
ffffffff8872a800: 00 00 02 fa fa fa fa fa 00 00 00 05 fa fa fa fa
==================================================================
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: KASAN: global-out-of-bounds Read in fb_pad_aligned_buffer
2019-12-07 21:58 ` syzbot
(?)
@ 2019-12-09 15:58 ` syzbot
-1 siblings, 0 replies; 9+ messages in thread
From: syzbot @ 2019-12-09 15:58 UTC (permalink / raw)
To: b.zolnierkie, coreteam, daniel.vetter, davem, dri-devel, gwshan,
kaber, kadlec, kraxel, linux-fbdev, linux-kernel,
maarten.lankhorst, mpe, netdev, netfilter-devel, pablo, peda,
ruscur, sam, stewart, syzkaller-bugs
syzbot has bisected this bug to:
commit 2de50e9674fc4ca3c6174b04477f69eb26b4ee31
Author: Russell Currey <ruscur@russell.cc>
Date: Mon Feb 8 04:08:20 2016 +0000
powerpc/powernv: Remove support for p5ioc2
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13ea0aeae00000
start commit: 9455d25f Merge tag 'ntb-5.5' of git://github.com/jonmason/..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=101a0aeae00000
console output: https://syzkaller.appspot.com/x/log.txt?x=17ea0aeae00000
kernel config: https://syzkaller.appspot.com/x/.config?x=7a3b8f5088d4043a
dashboard link: https://syzkaller.appspot.com/bug?extid=0568d05e486eee0a1ba2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15ddeca6e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16df9e41e00000
Reported-by: syzbot+0568d05e486eee0a1ba2@syzkaller.appspotmail.com
Fixes: 2de50e9674fc ("powerpc/powernv: Remove support for p5ioc2")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: KASAN: global-out-of-bounds Read in fb_pad_aligned_buffer
@ 2019-12-09 15:58 ` syzbot
0 siblings, 0 replies; 9+ messages in thread
From: syzbot @ 2019-12-09 15:58 UTC (permalink / raw)
To: b.zolnierkie, coreteam, daniel.vetter, davem, dri-devel, gwshan,
kaber, kadlec, kraxel, linux-fbdev, linux-kernel,
maarten.lankhorst, mpe, netdev, netfilter-devel, pablo, peda,
ruscur, sam, stewart, syzkaller-bugs
syzbot has bisected this bug to:
commit 2de50e9674fc4ca3c6174b04477f69eb26b4ee31
Author: Russell Currey <ruscur@russell.cc>
Date: Mon Feb 8 04:08:20 2016 +0000
powerpc/powernv: Remove support for p5ioc2
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x\x13ea0aeae00000
start commit: 9455d25f Merge tag 'ntb-5.5' of git://github.com/jonmason/..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x\x101a0aeae00000
console output: https://syzkaller.appspot.com/x/log.txt?x\x17ea0aeae00000
kernel config: https://syzkaller.appspot.com/x/.config?xz3b8f5088d4043a
dashboard link: https://syzkaller.appspot.com/bug?extid\x0568d05e486eee0a1ba2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x\x15ddeca6e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x\x16df9e41e00000
Reported-by: syzbot+0568d05e486eee0a1ba2@syzkaller.appspotmail.com
Fixes: 2de50e9674fc ("powerpc/powernv: Remove support for p5ioc2")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: KASAN: global-out-of-bounds Read in fb_pad_aligned_buffer
@ 2019-12-09 15:58 ` syzbot
0 siblings, 0 replies; 9+ messages in thread
From: syzbot @ 2019-12-09 15:58 UTC (permalink / raw)
To: b.zolnierkie, coreteam, daniel.vetter, davem, dri-devel, gwshan,
kaber, kadlec, kraxel, linux-fbdev, linux-kernel,
maarten.lankhorst, mpe, netdev, netfilter-devel, pablo, peda,
ruscur, sam, stewart, syzkaller-bugs
syzbot has bisected this bug to:
commit 2de50e9674fc4ca3c6174b04477f69eb26b4ee31
Author: Russell Currey <ruscur@russell.cc>
Date: Mon Feb 8 04:08:20 2016 +0000
powerpc/powernv: Remove support for p5ioc2
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13ea0aeae00000
start commit: 9455d25f Merge tag 'ntb-5.5' of git://github.com/jonmason/..
git tree: upstream
final crash: https://syzkaller.appspot.com/x/report.txt?x=101a0aeae00000
console output: https://syzkaller.appspot.com/x/log.txt?x=17ea0aeae00000
kernel config: https://syzkaller.appspot.com/x/.config?x=7a3b8f5088d4043a
dashboard link: https://syzkaller.appspot.com/bug?extid=0568d05e486eee0a1ba2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15ddeca6e00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16df9e41e00000
Reported-by: syzbot+0568d05e486eee0a1ba2@syzkaller.appspotmail.com
Fixes: 2de50e9674fc ("powerpc/powernv: Remove support for p5ioc2")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2019-12-10 8:40 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-12-07 21:58 KASAN: global-out-of-bounds Read in fb_pad_aligned_buffer syzbot
2019-12-07 21:58 ` syzbot
2019-12-07 21:58 ` syzbot
2019-12-09 4:27 ` syzbot
2019-12-09 4:27 ` syzbot
2019-12-09 4:27 ` syzbot
2019-12-09 15:58 ` syzbot
2019-12-09 15:58 ` syzbot
2019-12-09 15:58 ` syzbot
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