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John David Anglin b7931c2867 parisc: Check region is readable by user in raw_copy_from_user() ... commit 91428ca932 upstream. Because of the way the _PAGE_READ is handled in the parisc PTE, an access interruption is not generated when the kernel reads from a region where the _PAGE_READ is zero. The current code was written assuming read access faults would also occur in the kernel. This change adds user access checks to raw_copy_from_user(). The prober_user() define checks whether user code has read access to a virtual address. Note that page faults are not handled in the exception support for the probe instruction. For this reason, we precede the probe by a ldb access check. Signed-off-by: John David Anglin <dave.anglin@bell.net> Signed-off-by: Helge Deller <deller@gmx.de> Cc: stable@vger.kernel.org # v5.12+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2025-08-28 16:26:08 +02:00
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bitops.c	parisc: mark xchg functions notrace	2021-11-01 07:36:00 +01:00
checksum.c	unify generic instances of csum_partial_copy_nocheck()	2020-08-20 15:45:14 -04:00
delay.c	parisc: remove duplicate includes	2017-12-17 21:06:25 +01:00
io.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
iomap.c	parisc: Drop homebrewn io[read|write]64_[lo_hi|hi_lo]	2022-09-23 21:52:27 +02:00
lusercopy.S	parisc: Implement __get/put_kernel_nofault()	2021-09-09 22:53:09 +02:00
Makefile	Revert "parisc: Add assembly implementations for memset, strlen, strcpy, strncpy and strcat"	2021-08-29 10:13:32 -07:00
memcpy.c	parisc: Check region is readable by user in raw_copy_from_user()	2025-08-28 16:26:08 +02:00
memset.c	Revert "parisc: Add assembly implementations for memset, strlen, strcpy, strncpy and strcat"	2021-08-29 10:13:32 -07:00
ucmpdi2.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00