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authorArnd Bergmann <arnd@arndb.de>2021-03-22 17:02:39 +0100
committerIngo Molnar <mingo@kernel.org>2021-03-23 00:16:25 +0100
commite14cfb3bdd0f82147d09e9f46bedda6302f28ee1 (patch)
tree101a917d41c58ca7fac239718accb6cc36a5715c /arch/x86/boot
parentcdc34cb8f25d3125d30868376b8eae6fe690119b (diff)
downloadlinux-e14cfb3bdd0f82147d09e9f46bedda6302f28ee1.tar.bz2
x86/boot/compressed: Avoid gcc-11 -Wstringop-overread warning
GCC gets confused by the comparison of a pointer to an integer literal, with the assumption that this is an offset from a NULL pointer and that dereferencing it is invalid: In file included from arch/x86/boot/compressed/misc.c:18: In function ‘parse_elf’, inlined from ‘extract_kernel’ at arch/x86/boot/compressed/misc.c:442:2: arch/x86/boot/compressed/../string.h:15:23: error: ‘__builtin_memcpy’ reading 64 bytes from a region of size 0 [-Werror=stringop-overread] 15 | #define memcpy(d,s,l) __builtin_memcpy(d,s,l) | ^~~~~~~~~~~~~~~~~~~~~~~ arch/x86/boot/compressed/misc.c:283:9: note: in expansion of macro ‘memcpy’ 283 | memcpy(&ehdr, output, sizeof(ehdr)); | ^~~~~~ I could not find any good workaround for this, but as this is only a warning for a failure during early boot, removing the line entirely works around the warning. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Martin Sebor <msebor@gmail.com> Link: https://lore.kernel.org/r/20210322160253.4032422-2-arnd@kernel.org
Diffstat (limited to 'arch/x86/boot')
-rw-r--r--arch/x86/boot/compressed/misc.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index 267e7f93050e..1945b8a0cad8 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -430,8 +430,6 @@ asmlinkage __visible void *extract_kernel(void *rmode, memptr heap,
error("Destination address too large");
#endif
#ifndef CONFIG_RELOCATABLE
- if ((unsigned long)output != LOAD_PHYSICAL_ADDR)
- error("Destination address does not match LOAD_PHYSICAL_ADDR");
if (virt_addr != LOAD_PHYSICAL_ADDR)
error("Destination virtual address changed when not relocatable");
#endif