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91428ca932
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+ |
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| .. | ||
| bitops.c | ||
| checksum.c | ||
| delay.c | ||
| io.c | ||
| iomap.c | ||
| lusercopy.S | ||
| Makefile | ||
| memcpy.c | ||
| memset.c | ||
| ucmpdi2.c | ||