https://github.com/torvalds/linux
Revision 86ff25ed6cd8240d18df58930bd8848b19fce308 authored by Greg Kroah-Hartman on 29 July 2021, 14:35:32 UTC, committed by Wolfram Sang on 10 August 2021, 20:54:10 UTC
If an i2c driver happens to not provide the full amount of data that a
user asks for, it is possible that some uninitialized data could be sent
to userspace.  While all in-kernel drivers look to be safe, just be sure
by initializing the buffer to zero before it is passed to the i2c driver
so that any future drivers will not have this issue.

Also properly copy the amount of data recvieved to the userspace buffer,
as pointed out by Dan Carpenter.

Reported-by: Eric Dumazet <edumazet@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
1 parent bba676c
History
Tip revision: 86ff25ed6cd8240d18df58930bd8848b19fce308 authored by Greg Kroah-Hartman on 29 July 2021, 14:35:32 UTC
i2c: dev: zero out array used for i2c reads from userspace
Tip revision: 86ff25e
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