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From: "jpalus at fastmail dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug libc/28990] ld.so --verify segfaults on cc1 binary on arm 32bit
Date: Tue, 22 Mar 2022 15:53:07 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28990

--- Comment #1 from Jan Palus <jpalus at fastmail dot com> ---
Looks like it might be related to linux kernel 5.17. It appears to work fine
with 5.15 and 5.16.

likely not very useful but strace between versions:
5.15:
execve("/lib/ld-linux-armhf.so.3", ["/lib/ld-linux-armhf.so.3", "--verify",
"/usr/lib/gcc/armv6hl-pld-linux-g"...], 0x7e8365ac /* 52 vars */) =3D 0
brk(NULL)                               =3D 0xd93000
openat(AT_FDCWD, "/usr/lib/gcc/armv6hl-pld-linux-gnueabi/11.2.0/cc1",
O_RDONLY|O_LARGEFILE|O_CLOEXEC) =3D 3
read(3, "\177ELF\1\1\1\3\0\0\0\0\0\0\0\0\2\0(\0\1\0\0\0P(\32\0004\0\0\0"...,
512) =3D 512
mmap2(0x10000, 20832256, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) =3D 0x10000
mmap2(0x13fe000, 98304, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13de000) =3D 0x13fe000
mmap2(0x1416000, 945808, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) =3D 0x1416000
close(3)                                =3D 0
exit_group(0)                           =3D ?
+++ exited with 0 +++

5.17:
execve("/lib/ld-linux-armhf.so.3", ["/lib/ld-linux-armhf.so.3", "--verify",
"/usr/lib/gcc/armv6hl-pld-linux-g"...], 0x7ec004ec /* 57 vars */) =3D 0
brk(NULL)                               =3D 0xc89000
openat(AT_FDCWD, "/usr/lib/gcc/armv6hl-pld-linux-gnueabi/11.2.0/cc1",
O_RDONLY|O_LARGEFILE|O_CLOEXEC) =3D 3
read(3, "\177ELF\1\1\1\3\0\0\0\0\0\0\0\0\2\0(\0\1\0\0\0P(\32\0004\0\0\0"...,
512) =3D 512
mmap2(0x10000, 20832256, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) =3D 0x10000
--- SIGSEGV {si_signo=3DSIGSEGV, si_code=3DSEGV_MAPERR, si_addr=3D0x10} ---

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