19fdbc60b6
[ Upstream commit ceac10c83b330680cc01ceaaab86cd49f4f30d81 ]
__copy_to_user_memcpy() and __clear_user_memset() had been calling
memcpy() and memset() respectively, leading to false-positive KASAN
reports when starting userspace:
[ 10.707901] Run /init as init process
[ 10.731892] process '/bin/busybox' started with executable stack
[ 10.745234] ==================================================================
[ 10.745796] BUG: KASAN: user-memory-access in __clear_user_memset+0x258/0x3ac
[ 10.747260] Write of size 2687 at addr 000de581 by task init/1
Use __memcpy() and __memset() instead to allow userspace access, which
is of course the intent of these functions.
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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| .. | ||
| ashldi3.S | ||
| ashrdi3.S | ||
| backtrace-clang.S | ||
| backtrace.S | ||
| bitops.h | ||
| bswapsdi2.S | ||
| call_with_stack.S | ||
| changebit.S | ||
| clear_user.S | ||
| clearbit.S | ||
| copy_from_user.S | ||
| copy_page.S | ||
| copy_template.S | ||
| copy_to_user.S | ||
| csumipv6.S | ||
| csumpartial.S | ||
| csumpartialcopy.S | ||
| csumpartialcopygeneric.S | ||
| csumpartialcopyuser.S | ||
| delay-loop.S | ||
| delay.c | ||
| div64.S | ||
| findbit.S | ||
| getuser.S | ||
| io-readsb.S | ||
| io-readsl.S | ||
| io-readsw-armv3.S | ||
| io-readsw-armv4.S | ||
| io-writesb.S | ||
| io-writesl.S | ||
| io-writesw-armv3.S | ||
| io-writesw-armv4.S | ||
| lib1funcs.S | ||
| lshrdi3.S | ||
| Makefile | ||
| memchr.S | ||
| memcpy.S | ||
| memmove.S | ||
| memset.S | ||
| muldi3.S | ||
| putuser.S | ||
| setbit.S | ||
| strchr.S | ||
| strrchr.S | ||
| testchangebit.S | ||
| testclearbit.S | ||
| testsetbit.S | ||
| uaccess_with_memcpy.c | ||
| ucmpdi2.S | ||
| xor-neon.c | ||