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| author | Aldy Hernandez <aldyh@redhat.com> | 2021-09-28 15:54:20 +0200 |
|---|---|---|
| committer | Aldy Hernandez <aldyh@redhat.com> | 2021-09-30 09:54:16 +0200 |
| commit | f5440ac7ad535edcf143a877c3da11a41cbf2c37 (patch) | |
| tree | 50900216027ba0110ee7787e2b6e1da6ab0906c6 /gcc/lto-wrapper.c | |
| parent | b38a4bd10249b5070ea1f4708a0fd228df268c26 (diff) | |
| download | gcc-f5440ac7ad535edcf143a877c3da11a41cbf2c37.zip gcc-f5440ac7ad535edcf143a877c3da11a41cbf2c37.tar.gz gcc-f5440ac7ad535edcf143a877c3da11a41cbf2c37.tar.bz2 | |
Plug possible snprintf overflow in lto-wrapper.
My upcoming improvements to the DOM threader triggered a warning in
this code. It looks like the format string is ".ltrans%u.ltrans", but
we're only writing a max of ".ltrans" + whatever the MAX_INT is here.
Tested on x86-64 Linux.
gcc/ChangeLog:
* lto-wrapper.c (run_gcc): Plug snprintf overflow.
Diffstat (limited to 'gcc/lto-wrapper.c')
| -rw-r--r-- | gcc/lto-wrapper.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/gcc/lto-wrapper.c b/gcc/lto-wrapper.c index 903c258..7b9e488 100644 --- a/gcc/lto-wrapper.c +++ b/gcc/lto-wrapper.c @@ -1983,7 +1983,9 @@ cont: output_name = XOBFINISH (&env_obstack, char *); /* Adjust the dumpbase if the linker output file was seen. */ - int dumpbase_len = (strlen (dumppfx) + sizeof (DUMPBASE_SUFFIX)); + int dumpbase_len = (strlen (dumppfx) + + sizeof (DUMPBASE_SUFFIX) + + sizeof (".ltrans")); char *dumpbase = (char *) xmalloc (dumpbase_len + 1); snprintf (dumpbase, dumpbase_len, "%sltrans%u.ltrans", dumppfx, i); argv_ptr[0] = dumpbase; @@ -2009,9 +2011,11 @@ cont: } else { - char argsuffix[sizeof (DUMPBASE_SUFFIX) + 1]; + char argsuffix[sizeof (DUMPBASE_SUFFIX) + + sizeof (".ltrans_args") + 1]; if (save_temps) - snprintf (argsuffix, sizeof (DUMPBASE_SUFFIX), + snprintf (argsuffix, + sizeof (DUMPBASE_SUFFIX) + sizeof (".ltrans_args"), "ltrans%u.ltrans_args", i); fork_execute (new_argv[0], CONST_CAST (char **, new_argv), true, save_temps ? argsuffix : NULL); |