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74e96bf44f
linux/arch/powerpc/platforms
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Mahesh Salgaonkar 74e96bf44f powerpc/pseries: Avoid using the size greater than RTAS_ERROR_LOG_MAX. 
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>
2018-08-07 21:49:28 +10:00
..
4xx powerpc/4xx: Fix error return path in ppc4xx_msi_probe() 2018-08-03 20:08:20 +10:00
8xx powerpc/8xx: Remove RTC clock on 88x 2018-06-04 00:39:18 +10:00
40x License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
44x powerpc/44x/fsp2: Add irq error handlers 2017-12-11 13:03:34 +11:00
52xx powerpc/mpc5200: Remove VLA usage 2018-07-03 12:00:54 +10:00
82xx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
83xx powerpc: remove retired sbc834x support 2018-05-03 22:32:30 +10:00
85xx powerpc/64: Use array of paca pointers and allocate pacas individually 2018-03-30 23:34:23 +11:00
86xx powerpc: Use pr_warn instead of pr_warning 2017-12-04 11:54:34 +11:00
512x powerpc: Use pr_warn instead of pr_warning 2017-12-04 11:54:34 +11:00
amigaone License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cell powerpc: clean the inclusion of stringify.h 2018-07-30 22:48:17 +10:00
chrp chrp/nvram.c: add MODULE_LICENSE() 2018-07-19 14:38:46 +10:00
embedded6xx powerpc: wii: Remove outdated comment about memory fixups 2018-07-02 23:54:27 +10:00
maple powerpc: use time64_t in read_persistent_clock 2018-06-03 20:43:33 +10:00
pasemi powerpc: use time64_t in read_persistent_clock 2018-06-03 20:43:33 +10:00
powermac powerpc: clean inclusions of asm/feature-fixups.h 2018-07-30 22:48:17 +10:00
powernv powerpc/xive: Remove xive_kexec_teardown_cpu() 2018-08-07 21:49:28 +10:00
ps3 powerpc: remove unused to_tm() helper 2018-06-03 20:43:34 +10:00
pseries powerpc/pseries: Avoid using the size greater than RTAS_ERROR_LOG_MAX. 2018-08-07 21:49:28 +10:00
fsl_uli1575.c of/irq: Refactor interrupt-map parsing 2013-10-24 11:43:04 +01:00
Kconfig powerpc/cell: Remove axonram driver 2018-01-28 17:00:36 +11:00
Kconfig.cputype powerpc: Enable kernel XZ compression option on BOOK3S_32 2018-07-04 22:41:10 +10:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00