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| author |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-06 15:33:36 +0100 |
|---|---|---|
| committer |   Jiri Kosina <jkosina@suse.cz> | 2017-01-06 16:06:43 +0100 |
| commit | 1ebb71143758f45dc0fa76e2f48429e13b16d110 (patch) | |
| tree | 807bc3a12427e4334d2c54716759e26ac2c3ebc1 /drivers/hid/hid-cypress.c | |
| parent | HID: ignore Petzl USB headlamp (diff) | |
| download | linux-dev-1ebb71143758f45dc0fa76e2f48429e13b16d110.tar.xz linux-dev-1ebb71143758f45dc0fa76e2f48429e13b16d110.zip | |
HID: hid-cypress: validate length of report
Make sure we have enough of a report structure to validate before
looking at it.
Reported-by: Benoit Camredon <benoit.camredon@airbus.com>
Tested-by: Benoit Camredon <benoit.camredon@airbus.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-cypress.c')
| -rw-r--r-- | drivers/hid/hid-cypress.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hid/hid-cypress.c b/drivers/hid/hid-cypress.c index 1b764d1745f3..1689568b597d 100644 --- a/drivers/hid/hid-cypress.c +++ b/drivers/hid/hid-cypress.c @@ -39,6 +39,9 @@ static __u8 *cp_report_fixup(struct hid_device *hdev, __u8 *rdesc, if (!(quirks & CP_RDESC_SWAPPED_MIN_MAX)) return rdesc; + if (*rsize < 4) + return rdesc; + for (i = 0; i < *rsize - 4; i++) if (rdesc[i] == 0x29 && rdesc[i + 2] == 0x19) { rdesc[i] = 0x19; |