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| author | Martin Liska <mliska@suse.cz> | 2022-05-16 09:48:27 +0200 |
|---|---|---|
| committer | Martin Liska <mliska@suse.cz> | 2022-05-16 09:53:33 +0200 |
| commit | ec69db6be6912e45fa5f54f2d231d56e52612f1d (patch) | |
| tree | 18bf834e0382f251d0f422f07eb34096251b4e25 | |
| parent | 9a53101caadae1b5c8d791d247b05268ee4f7f92 (diff) | |
| download | gcc-ec69db6be6912e45fa5f54f2d231d56e52612f1d.zip gcc-ec69db6be6912e45fa5f54f2d231d56e52612f1d.tar.gz gcc-ec69db6be6912e45fa5f54f2d231d56e52612f1d.tar.bz2 | |
Fix ubsan error in opts-global.cc
Fixes:
opts-global.cc:75:15: runtime error: store to address 0x00000bc9be70 with insufficient space for an object of type 'char'
which happens when mask == 0, len == 0 and we allocate zero elements.
Eventually, result[0] is called which triggers the UBSAN.
gcc/ChangeLog:
* opts-global.cc (write_langs): Allocate at least one byte.
| -rw-r--r-- | gcc/opts-global.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/opts-global.cc b/gcc/opts-global.cc index a18c769..4f5f8cd 100644 --- a/gcc/opts-global.cc +++ b/gcc/opts-global.cc @@ -61,7 +61,7 @@ write_langs (unsigned int mask) if (mask & (1U << n)) len += strlen (lang_name) + 1; - result = XNEWVEC (char, len); + result = XNEWVEC (char, MAX (1, len)); len = 0; for (n = 0; (lang_name = lang_names[n]) != 0; n++) if (mask & (1U << n)) |