From: syzbot <syzbot+0dc4444774d419e916c8@syzkaller.appspotmail.com>
To: airlied@linux.ie, alexander.deucher@amd.com,
amd-gfx@lists.freedesktop.org, chris@chris-wilson.co.uk,
christian.koenig@amd.com, dan.carpenter@oracle.com,
daniel@ffwll.ch, davem@davemloft.net,
dri-devel@lists.freedesktop.org, emil.velikov@collabora.com,
eric@anholt.net, hdanton@sina.com,
linaro-mm-sig-owner@lists.linaro.org,
linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org, netdev@vger.kernel.org,
robdclark@chromium.org, seanpaul@chromium.org,
sumit.semwal@linaro.org, syzkaller-bugs@googlegroups.com
Subject: Re: KASAN: use-after-free Read in vgem_gem_dumb_create
Date: Sat, 01 Feb 2020 20:38:12 -0800 [thread overview]
Message-ID: <000000000000d42f3e059d905fe3@google.com> (raw)
In-Reply-To: <000000000000ae2f81059d7716b8@google.com>
syzbot has found a reproducer for the following crash on:
HEAD commit: 94f2630b Merge tag '5.6-rc-small-smb3-fix-for-stable' of g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11d6c776e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=99db4e42d047be3
dashboard link: https://syzkaller.appspot.com/bug?extid=0dc4444774d419e916c8
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=152385bee00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123210a1e00000
The bug was bisected to:
commit 7611750784664db46d0db95631e322aeb263dde7
Author: Alex Deucher <alexander.deucher@amd.com>
Date: Wed Jun 21 16:31:41 2017 +0000
drm/amdgpu: use kernel is_power_of_2 rather than local version
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11628df1e00000
final crash: https://syzkaller.appspot.com/x/report.txt?x=13628df1e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=15628df1e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0dc4444774d419e916c8@syzkaller.appspotmail.com
Fixes: 761175078466 ("drm/amdgpu: use kernel is_power_of_2 rather than local version")
==================================================================
BUG: KASAN: use-after-free in vgem_gem_dumb_create+0x238/0x250 drivers/gpu/drm/vgem/vgem_drv.c:221
Read of size 8 at addr ffff88809a2ee908 by task syz-executor815/10244
CPU: 1 PID: 10244 Comm: syz-executor815 Not tainted 5.5.0-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+0xd4/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x32 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:641
__asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135
vgem_gem_dumb_create+0x238/0x250 drivers/gpu/drm/vgem/vgem_drv.c:221
drm_mode_create_dumb+0x282/0x310 drivers/gpu/drm/drm_dumb_buffers.c:94
drm_mode_create_dumb_ioctl+0x26/0x30 drivers/gpu/drm/drm_dumb_buffers.c:100
drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:786
drm_ioctl+0x54e/0xa60 drivers/gpu/drm/drm_ioctl.c:886
vfs_ioctl fs/ioctl.c:47 [inline]
ksys_ioctl+0x123/0x180 fs/ioctl.c:747
__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: 0033:0x44c3e9
Code: e8 8c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 1b cc fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f40263e9db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 000000000044c3e9
RDX: 0000000020000000 RSI: 00000000c02064b2 RDI: 0000000000000004
RBP: 00000000006ddc50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc5c
R13: 00007ffed0d4362f R14: 00007f40263ea9c0 R15: 00000000006ddc5c
Allocated by task 10244:
save_stack+0x23/0x90 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
__kasan_kmalloc mm/kasan/common.c:515 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:488
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529
kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3551
kmalloc include/linux/slab.h:556 [inline]
kzalloc include/linux/slab.h:670 [inline]
__vgem_gem_create+0x49/0x100 drivers/gpu/drm/vgem/vgem_drv.c:165
vgem_gem_create drivers/gpu/drm/vgem/vgem_drv.c:194 [inline]
vgem_gem_dumb_create+0xd7/0x250 drivers/gpu/drm/vgem/vgem_drv.c:217
drm_mode_create_dumb+0x282/0x310 drivers/gpu/drm/drm_dumb_buffers.c:94
drm_mode_create_dumb_ioctl+0x26/0x30 drivers/gpu/drm/drm_dumb_buffers.c:100
drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:786
drm_ioctl+0x54e/0xa60 drivers/gpu/drm/drm_ioctl.c:886
vfs_ioctl fs/ioctl.c:47 [inline]
ksys_ioctl+0x123/0x180 fs/ioctl.c:747
__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
Freed by task 10244:
save_stack+0x23/0x90 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
kasan_set_free_info mm/kasan/common.c:337 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:476
kasan_slab_free+0xe/0x10 mm/kasan/common.c:485
__cache_free mm/slab.c:3426 [inline]
kfree+0x10a/0x2c0 mm/slab.c:3757
vgem_gem_free_object+0xbe/0xe0 drivers/gpu/drm/vgem/vgem_drv.c:68
drm_gem_object_free+0x100/0x220 drivers/gpu/drm/drm_gem.c:983
kref_put include/linux/kref.h:65 [inline]
drm_gem_object_put_unlocked drivers/gpu/drm/drm_gem.c:1017 [inline]
drm_gem_object_put_unlocked+0x196/0x1c0 drivers/gpu/drm/drm_gem.c:1002
vgem_gem_create drivers/gpu/drm/vgem/vgem_drv.c:199 [inline]
vgem_gem_dumb_create+0x115/0x250 drivers/gpu/drm/vgem/vgem_drv.c:217
drm_mode_create_dumb+0x282/0x310 drivers/gpu/drm/drm_dumb_buffers.c:94
drm_mode_create_dumb_ioctl+0x26/0x30 drivers/gpu/drm/drm_dumb_buffers.c:100
drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:786
drm_ioctl+0x54e/0xa60 drivers/gpu/drm/drm_ioctl.c:886
vfs_ioctl fs/ioctl.c:47 [inline]
ksys_ioctl+0x123/0x180 fs/ioctl.c:747
__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
The buggy address belongs to the object at ffff88809a2ee800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 264 bytes inside of
1024-byte region [ffff88809a2ee800, ffff88809a2eec00)
The buggy address belongs to the page:
page:ffffea000268bb80 refcount:1 mapcount:0 mapping:ffff8880aa400c40 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002816448 ffffea0002551bc8 ffff8880aa400c40
raw: 0000000000000000 ffff88809a2ee000 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88809a2ee800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809a2ee880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88809a2ee900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88809a2ee980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809a2eea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
WARNING: multiple messages have this Message-ID (diff)
From: syzbot <syzbot+0dc4444774d419e916c8@syzkaller.appspotmail.com>
To: airlied@linux.ie, alexander.deucher@amd.com,
amd-gfx@lists.freedesktop.org, chris@chris-wilson.co.uk,
christian.koenig@amd.com, dan.carpenter@oracle.com,
daniel@ffwll.ch, davem@davemloft.net,
dri-devel@lists.freedesktop.org, emil.velikov@collabora.com,
eric@anholt.net, hdanton@sina.com,
linaro-mm-sig-owner@lists.linaro.org,
linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org, netdev@vger.kernel.org,
robdclark@chromium.org, seanpaul@chromium.org,
sumit.semwal@linaro.org, syzkaller-bugs@googlegroups.com
Subject: Re: KASAN: use-after-free Read in vgem_gem_dumb_create
Date: Sat, 01 Feb 2020 20:38:12 -0800 [thread overview]
Message-ID: <000000000000d42f3e059d905fe3@google.com> (raw)
In-Reply-To: <000000000000ae2f81059d7716b8@google.com>
syzbot has found a reproducer for the following crash on:
HEAD commit: 94f2630b Merge tag '5.6-rc-small-smb3-fix-for-stable' of g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11d6c776e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=99db4e42d047be3
dashboard link: https://syzkaller.appspot.com/bug?extid=0dc4444774d419e916c8
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=152385bee00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123210a1e00000
The bug was bisected to:
commit 7611750784664db46d0db95631e322aeb263dde7
Author: Alex Deucher <alexander.deucher@amd.com>
Date: Wed Jun 21 16:31:41 2017 +0000
drm/amdgpu: use kernel is_power_of_2 rather than local version
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11628df1e00000
final crash: https://syzkaller.appspot.com/x/report.txt?x=13628df1e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=15628df1e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0dc4444774d419e916c8@syzkaller.appspotmail.com
Fixes: 761175078466 ("drm/amdgpu: use kernel is_power_of_2 rather than local version")
==================================================================
BUG: KASAN: use-after-free in vgem_gem_dumb_create+0x238/0x250 drivers/gpu/drm/vgem/vgem_drv.c:221
Read of size 8 at addr ffff88809a2ee908 by task syz-executor815/10244
CPU: 1 PID: 10244 Comm: syz-executor815 Not tainted 5.5.0-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+0xd4/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x32 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:641
__asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135
vgem_gem_dumb_create+0x238/0x250 drivers/gpu/drm/vgem/vgem_drv.c:221
drm_mode_create_dumb+0x282/0x310 drivers/gpu/drm/drm_dumb_buffers.c:94
drm_mode_create_dumb_ioctl+0x26/0x30 drivers/gpu/drm/drm_dumb_buffers.c:100
drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:786
drm_ioctl+0x54e/0xa60 drivers/gpu/drm/drm_ioctl.c:886
vfs_ioctl fs/ioctl.c:47 [inline]
ksys_ioctl+0x123/0x180 fs/ioctl.c:747
__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: 0033:0x44c3e9
Code: e8 8c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 1b cc fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f40263e9db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 000000000044c3e9
RDX: 0000000020000000 RSI: 00000000c02064b2 RDI: 0000000000000004
RBP: 00000000006ddc50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc5c
R13: 00007ffed0d4362f R14: 00007f40263ea9c0 R15: 00000000006ddc5c
Allocated by task 10244:
save_stack+0x23/0x90 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
__kasan_kmalloc mm/kasan/common.c:515 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:488
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529
kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3551
kmalloc include/linux/slab.h:556 [inline]
kzalloc include/linux/slab.h:670 [inline]
__vgem_gem_create+0x49/0x100 drivers/gpu/drm/vgem/vgem_drv.c:165
vgem_gem_create drivers/gpu/drm/vgem/vgem_drv.c:194 [inline]
vgem_gem_dumb_create+0xd7/0x250 drivers/gpu/drm/vgem/vgem_drv.c:217
drm_mode_create_dumb+0x282/0x310 drivers/gpu/drm/drm_dumb_buffers.c:94
drm_mode_create_dumb_ioctl+0x26/0x30 drivers/gpu/drm/drm_dumb_buffers.c:100
drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:786
drm_ioctl+0x54e/0xa60 drivers/gpu/drm/drm_ioctl.c:886
vfs_ioctl fs/ioctl.c:47 [inline]
ksys_ioctl+0x123/0x180 fs/ioctl.c:747
__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
Freed by task 10244:
save_stack+0x23/0x90 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
kasan_set_free_info mm/kasan/common.c:337 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:476
kasan_slab_free+0xe/0x10 mm/kasan/common.c:485
__cache_free mm/slab.c:3426 [inline]
kfree+0x10a/0x2c0 mm/slab.c:3757
vgem_gem_free_object+0xbe/0xe0 drivers/gpu/drm/vgem/vgem_drv.c:68
drm_gem_object_free+0x100/0x220 drivers/gpu/drm/drm_gem.c:983
kref_put include/linux/kref.h:65 [inline]
drm_gem_object_put_unlocked drivers/gpu/drm/drm_gem.c:1017 [inline]
drm_gem_object_put_unlocked+0x196/0x1c0 drivers/gpu/drm/drm_gem.c:1002
vgem_gem_create drivers/gpu/drm/vgem/vgem_drv.c:199 [inline]
vgem_gem_dumb_create+0x115/0x250 drivers/gpu/drm/vgem/vgem_drv.c:217
drm_mode_create_dumb+0x282/0x310 drivers/gpu/drm/drm_dumb_buffers.c:94
drm_mode_create_dumb_ioctl+0x26/0x30 drivers/gpu/drm/drm_dumb_buffers.c:100
drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:786
drm_ioctl+0x54e/0xa60 drivers/gpu/drm/drm_ioctl.c:886
vfs_ioctl fs/ioctl.c:47 [inline]
ksys_ioctl+0x123/0x180 fs/ioctl.c:747
__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
The buggy address belongs to the object at ffff88809a2ee800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 264 bytes inside of
1024-byte region [ffff88809a2ee800, ffff88809a2eec00)
The buggy address belongs to the page:
page:ffffea000268bb80 refcount:1 mapcount:0 mapping:ffff8880aa400c40 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002816448 ffffea0002551bc8 ffff8880aa400c40
raw: 0000000000000000 ffff88809a2ee000 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88809a2ee800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809a2ee880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88809a2ee900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88809a2ee980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809a2eea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
WARNING: multiple messages have this Message-ID (diff)
From: syzbot <syzbot+0dc4444774d419e916c8@syzkaller.appspotmail.com>
To: airlied@linux.ie, alexander.deucher@amd.com,
amd-gfx@lists.freedesktop.org, chris@chris-wilson.co.uk,
christian.koenig@amd.com, dan.carpenter@oracle.com,
daniel@ffwll.ch, davem@davemloft.net,
dri-devel@lists.freedesktop.org, emil.velikov@collabora.com,
eric@anholt.net, hdanton@sina.com,
linaro-mm-sig-owner@lists.linaro.org,
linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org, netdev@vger.kernel.org,
robdclark@chromium.org, seanpaul@chromium.org,
sumit.semwal@linaro.org, syzkaller-bugs@googlegroups.com
Subject: Re: KASAN: use-after-free Read in vgem_gem_dumb_create
Date: Sat, 01 Feb 2020 20:38:12 -0800 [thread overview]
Message-ID: <000000000000d42f3e059d905fe3@google.com> (raw)
In-Reply-To: <000000000000ae2f81059d7716b8@google.com>
syzbot has found a reproducer for the following crash on:
HEAD commit: 94f2630b Merge tag '5.6-rc-small-smb3-fix-for-stable' of g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11d6c776e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=99db4e42d047be3
dashboard link: https://syzkaller.appspot.com/bug?extid=0dc4444774d419e916c8
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=152385bee00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123210a1e00000
The bug was bisected to:
commit 7611750784664db46d0db95631e322aeb263dde7
Author: Alex Deucher <alexander.deucher@amd.com>
Date: Wed Jun 21 16:31:41 2017 +0000
drm/amdgpu: use kernel is_power_of_2 rather than local version
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11628df1e00000
final crash: https://syzkaller.appspot.com/x/report.txt?x=13628df1e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=15628df1e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0dc4444774d419e916c8@syzkaller.appspotmail.com
Fixes: 761175078466 ("drm/amdgpu: use kernel is_power_of_2 rather than local version")
==================================================================
BUG: KASAN: use-after-free in vgem_gem_dumb_create+0x238/0x250 drivers/gpu/drm/vgem/vgem_drv.c:221
Read of size 8 at addr ffff88809a2ee908 by task syz-executor815/10244
CPU: 1 PID: 10244 Comm: syz-executor815 Not tainted 5.5.0-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+0xd4/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x32 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:641
__asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135
vgem_gem_dumb_create+0x238/0x250 drivers/gpu/drm/vgem/vgem_drv.c:221
drm_mode_create_dumb+0x282/0x310 drivers/gpu/drm/drm_dumb_buffers.c:94
drm_mode_create_dumb_ioctl+0x26/0x30 drivers/gpu/drm/drm_dumb_buffers.c:100
drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:786
drm_ioctl+0x54e/0xa60 drivers/gpu/drm/drm_ioctl.c:886
vfs_ioctl fs/ioctl.c:47 [inline]
ksys_ioctl+0x123/0x180 fs/ioctl.c:747
__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: 0033:0x44c3e9
Code: e8 8c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 1b cc fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f40263e9db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 000000000044c3e9
RDX: 0000000020000000 RSI: 00000000c02064b2 RDI: 0000000000000004
RBP: 00000000006ddc50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc5c
R13: 00007ffed0d4362f R14: 00007f40263ea9c0 R15: 00000000006ddc5c
Allocated by task 10244:
save_stack+0x23/0x90 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
__kasan_kmalloc mm/kasan/common.c:515 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:488
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529
kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3551
kmalloc include/linux/slab.h:556 [inline]
kzalloc include/linux/slab.h:670 [inline]
__vgem_gem_create+0x49/0x100 drivers/gpu/drm/vgem/vgem_drv.c:165
vgem_gem_create drivers/gpu/drm/vgem/vgem_drv.c:194 [inline]
vgem_gem_dumb_create+0xd7/0x250 drivers/gpu/drm/vgem/vgem_drv.c:217
drm_mode_create_dumb+0x282/0x310 drivers/gpu/drm/drm_dumb_buffers.c:94
drm_mode_create_dumb_ioctl+0x26/0x30 drivers/gpu/drm/drm_dumb_buffers.c:100
drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:786
drm_ioctl+0x54e/0xa60 drivers/gpu/drm/drm_ioctl.c:886
vfs_ioctl fs/ioctl.c:47 [inline]
ksys_ioctl+0x123/0x180 fs/ioctl.c:747
__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
Freed by task 10244:
save_stack+0x23/0x90 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
kasan_set_free_info mm/kasan/common.c:337 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:476
kasan_slab_free+0xe/0x10 mm/kasan/common.c:485
__cache_free mm/slab.c:3426 [inline]
kfree+0x10a/0x2c0 mm/slab.c:3757
vgem_gem_free_object+0xbe/0xe0 drivers/gpu/drm/vgem/vgem_drv.c:68
drm_gem_object_free+0x100/0x220 drivers/gpu/drm/drm_gem.c:983
kref_put include/linux/kref.h:65 [inline]
drm_gem_object_put_unlocked drivers/gpu/drm/drm_gem.c:1017 [inline]
drm_gem_object_put_unlocked+0x196/0x1c0 drivers/gpu/drm/drm_gem.c:1002
vgem_gem_create drivers/gpu/drm/vgem/vgem_drv.c:199 [inline]
vgem_gem_dumb_create+0x115/0x250 drivers/gpu/drm/vgem/vgem_drv.c:217
drm_mode_create_dumb+0x282/0x310 drivers/gpu/drm/drm_dumb_buffers.c:94
drm_mode_create_dumb_ioctl+0x26/0x30 drivers/gpu/drm/drm_dumb_buffers.c:100
drm_ioctl_kernel+0x244/0x300 drivers/gpu/drm/drm_ioctl.c:786
drm_ioctl+0x54e/0xa60 drivers/gpu/drm/drm_ioctl.c:886
vfs_ioctl fs/ioctl.c:47 [inline]
ksys_ioctl+0x123/0x180 fs/ioctl.c:747
__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
The buggy address belongs to the object at ffff88809a2ee800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 264 bytes inside of
1024-byte region [ffff88809a2ee800, ffff88809a2eec00)
The buggy address belongs to the page:
page:ffffea000268bb80 refcount:1 mapcount:0 mapping:ffff8880aa400c40 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002816448 ffffea0002551bc8 ffff8880aa400c40
raw: 0000000000000000 ffff88809a2ee000 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88809a2ee800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809a2ee880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88809a2ee900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88809a2ee980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809a2eea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
next prev parent reply other threads:[~2020-02-03 8:27 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-31 22:28 KASAN: use-after-free Read in vgem_gem_dumb_create syzbot
2020-01-31 22:28 ` syzbot
2020-01-31 22:28 ` syzbot
2020-02-01 5:56 ` Dan Carpenter
2020-02-01 5:56 ` Dan Carpenter
2020-02-01 5:56 ` Dan Carpenter
2020-02-02 4:38 ` syzbot [this message]
2020-02-02 4:38 ` syzbot
2020-02-02 4:38 ` syzbot
2020-02-02 13:19 ` Daniel Vetter
2020-02-02 13:19 ` Daniel Vetter
2020-02-02 13:19 ` Daniel Vetter
2020-02-03 9:06 ` Dan Carpenter
2020-02-03 9:06 ` Dan Carpenter
2020-02-03 9:06 ` Dan Carpenter
2020-02-03 15:08 ` Christian König
2020-02-03 15:08 ` Christian König
2020-02-03 15:08 ` Christian König
-- strict thread matches above, loose matches on Subject: below --
2020-02-01 4:32 Hillf Danton
2020-02-01 4:32 ` Hillf Danton
2020-02-01 6:17 ` Dan Carpenter
2020-02-01 6:17 ` Dan Carpenter
2020-02-01 6:17 ` Dan Carpenter
2020-02-01 9:02 ` Hillf Danton
2020-02-01 9:02 ` Hillf Danton
2020-02-01 16:25 ` Dan Carpenter
2020-02-01 16:25 ` Dan Carpenter
2020-02-01 16:25 ` Dan Carpenter
2020-02-02 13:17 ` Daniel Vetter
2020-02-02 13:17 ` Daniel Vetter
2020-02-02 13:17 ` Daniel Vetter
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=000000000000d42f3e059d905fe3@google.com \
--to=syzbot+0dc4444774d419e916c8@syzkaller.appspotmail.com \
--cc=airlied@linux.ie \
--cc=alexander.deucher@amd.com \
--cc=amd-gfx@lists.freedesktop.org \
--cc=chris@chris-wilson.co.uk \
--cc=christian.koenig@amd.com \
--cc=dan.carpenter@oracle.com \
--cc=daniel@ffwll.ch \
--cc=davem@davemloft.net \
--cc=dri-devel@lists.freedesktop.org \
--cc=emil.velikov@collabora.com \
--cc=eric@anholt.net \
--cc=hdanton@sina.com \
--cc=linaro-mm-sig-owner@lists.linaro.org \
--cc=linaro-mm-sig@lists.linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=robdclark@chromium.org \
--cc=seanpaul@chromium.org \
--cc=sumit.semwal@linaro.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.