[Bug ld/18899] New: sha1.c:324 sanitizer runtime error: load of misaligned address 0x62f00011847e for type 'const sha1_uint32', which requires 4 byte alignment

[zeccav at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18899

            Bug ID: 18899
           Summary: sha1.c:324 sanitizer runtime error: load of misaligned
                    address 0x62f00011847e for type 'const sha1_uint32',
                    which requires 4 byte alignment
           Product: binutils
           Version: 2.25
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: zeccav at gmail dot com
  Target Milestone: ---

While building the Fedora 21 kernel 4.1.6-100 with a sanitized version of ld
I got the following sanitizer messages (gcc -fsanitize=undefined)

sha1.c:324:11: runtime error: load of misaligned address 0x62f00011847e for
type 'const sha1_uint32', which requires 4 byte alignment
0x62f00011847e: note: pointer points here
 84 00 00 00 00 00  55 be 1a 00 00 00 48 c7  c7 60 7f c1 82 48 89 e5  e8 7b 03
ed fe 5d c3 66  0f 1f
             ^ 
sha1.c:324:11: runtime error: load of misaligned address 0x62f00011847e for
type 'const sha1_uint32', which requires 4 byte alignment
0x62f00011847e: note: pointer points here
 84 00 00 00 00 00  55 be 1a 00 00 00 48 c7  c7 60 7f c1 82 48 89 e5  e8 7b 03
ed fe 5d c3 66  0f 1f
             ^ 
sha1.c:324:11: runtime error: load of misaligned address 0x62f00011847e for
type 'const sha1_uint32', which requires 4 byte alignment
0x62f00011847e: note: pointer points here
 84 00 00 00 00 00  55 be 1a 00 00 00 48 c7  c7 60 7f c1 82 48 89 e5  e8 7b 03
ed fe 5d c3 66  0f 1f
             ^ 
sha1.c:324:11: runtime error: load of misaligned address 0x62f00011847e for
type 'const sha1_uint32', which requires 4 byte alignment
0x62f00011847e: note: pointer points here
 84 00 00 00 00 00  55 be 1a 00 00 00 48 c7  c7 60 7f c1 82 48 89 e5  e8 7b 03
ed fe 5d c3 66  0f 1f

sha1.c:324 is

x[t] = SWAP (*words);

so it seems that words is not a multiple of four, but it should point to type
sha1_uint32 which is four bytes aligned.
This is on x86-64 building "LD      init/built-in.o" and the command is

ld -m elf_x86_64 --build-id -X -o .tmp_vmlinux1 -T
./arch/x86/kernel/vmlinux.lds arch/x86/kernel/head_64.o
arch/x86/kernel/head64.o arch/x86/kernel/head.o init/built-in.o --start-group
usr/built-in.o arch/x86/built-in.o kernel/built-in.o mm/built-in.o
fs/built-in.o ipc/built-in.o security/built-in.o crypto/built-in.o
block/built-in.o lib/lib.a arch/x86/lib/lib.a lib/built-in.o
arch/x86/lib/built-in.o drivers/built-in.o sound/built-in.o firmware/built-in.o
arch/x86/pci/built-in.o arch/x86/power/built-in.o arch/x86/video/built-in.o
net/built-in.o --end-group

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