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| author | Johan Hovold <johan@kernel.org> | 2017-02-24 19:11:28 +0100 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2017-03-06 09:18:40 +0100 |
| commit | 2e46565cf622dd0534a9d8bffe152a577b48d7aa (patch) | |
| tree | f78ba8c9ca46ebf8eac75c038c423eef59c9ba46 /drivers | |
| parent | Linux 4.11-rc1 (diff) | |
| download | linux-2e46565cf622dd0534a9d8bffe152a577b48d7aa.tar.xz linux-2e46565cf622dd0534a9d8bffe152a577b48d7aa.zip | |
USB: serial: digi_acceleport: fix OOB-event processing
A recent change claimed to fix an off-by-one error in the OOB-port
completion handler, but instead introduced such an error. This could
specifically led to modem-status changes going unnoticed, effectively
breaking TIOCMGET.
Note that the offending commit fixes a loop-condition underflow and is
marked for stable, but should not be backported without this fix.
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Fixes: 2d380889215f ("USB: serial: digi_acceleport: fix OOB data sanity
check")
Cc: stable <stable@vger.kernel.org> # v2.6.30: 2d380889215f
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/serial/digi_acceleport.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index ab78111e0968..6537d3ca2797 100644 --- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -1500,7 +1500,7 @@ static int digi_read_oob_callback(struct urb *urb) return -1; /* handle each oob command */ - for (i = 0; i < urb->actual_length - 4; i += 4) { + for (i = 0; i < urb->actual_length - 3; i += 4) { opcode = buf[i]; line = buf[i + 1]; status = buf[i + 2]; |