diff options
| author | Vitaly Kuznetsov <[email protected]> | 2016-03-15 09:20:33 +0100 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2016-03-15 11:08:26 +0100 |
| commit | 743146db071c4a828159211a295d12ff4f61752f (patch) | |
| tree | 4a59e606c0e7fe94c8a11ae53b0c934e91cc72f1 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | e23604edac2a7be6a8808a5d13fac6b9df4eb9a8 (diff) | |
x86/video: Don't assume all FB devices are PCI devices
When booting Hyper-V Generation 2 guests KASAN reports the following
out-of-bounds access:
BUG: KASAN: slab-out-of-bounds in fb_is_primary_device+0x58/0x70 at addr ffff880079cf0eb0
Read of size 8 by task swapper/0/1
...
[<ffffffff81581308>] dump_stack+0x63/0x8b
[<ffffffff812e1f99>] print_trailer+0xf9/0x150
[<ffffffff812e7344>] object_err+0x34/0x40
[<ffffffff812e9630>] kasan_report_error+0x230/0x550
[<ffffffff812e9ee8>] kasan_report+0x58/0x60
[<ffffffff812e4500>] ? ___slab_alloc+0x80/0x490
[<ffffffff81878a28>] ? fb_is_primary_device+0x58/0x70
[<ffffffff812e87cd>] __asan_load8+0x5d/0x70
[<ffffffff81878a28>] fb_is_primary_device+0x58/0x70
[<ffffffff8162357a>] register_framebuffer+0xda/0x5b0
[<ffffffff816234a0>] ? remove_conflicting_framebuffers+0x50/0x50
...
The issue is caused by the to_pci_dev() call with no check that the given
info->device is in fact a PCI device and some FB devices (Hyper-V FB, EFI
FB,...) are not.
While on it, clean up the function.
Signed-off-by: Vitaly Kuznetsov <[email protected]>
Acked-by: Bjorn Helgaas <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Cathy Avery <[email protected]>
Cc: K. Y. Srinivasan <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions