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Mahesh Salgaonkar 214d87aee3 powerpc/pseries: Avoid using the size greater than RTAS_ERROR_LOG_MAX.

[ Upstream commit 74e96bf44f ]

The global mce data buffer that used to copy rtas error log is of 2048
(RTAS_ERROR_LOG_MAX) bytes in size. Before the copy we read
extended_log_length from rtas error log header, then use max of
extended_log_length and RTAS_ERROR_LOG_MAX as a size of data to be copied.
Ideally the platform (phyp) will never send extended error log with
size > 2048. But if that happens, then we have a risk of buffer overrun
and corruption. Fix this by using min_t instead.

Fixes: d368514c30 ("powerpc: Fix corruption when grabbing FWNMI data")
Reported-by: Michal Suchanek <msuchanek@suse.com>
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-09-15 09:46:54 +02:00

boot

powerpc/boot: Remove core support for Marvell mv64x60 hostbridges

2018-06-04 00:39:23 +10:00

configs

powerpc/embedded6xx: Remove C2K board support

2018-06-04 00:39:22 +10:00

crypto

…

include

powerpc/uaccess: Enable get_user(u64, *p) on 32-bit

2018-09-15 09:46:51 +02:00