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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2014-12-24 01:46:29 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2014-12-24 01:46:29 +0100 |
| commit | ca9c4653a95907e32674c2eb5dc3921dc8e6f1a0 (patch) | |
| tree | ae34c51b8329a5cdb73d4a5f6c242d20b14e9e8c /libbb/sysconf.c | |
| parent | 11775edbfc27d2ad1cd0dff3f7af385f67719866 (diff) | |
| download | busybox-w32-ca9c4653a95907e32674c2eb5dc3921dc8e6f1a0.tar.gz busybox-w32-ca9c4653a95907e32674c2eb5dc3921dc8e6f1a0.tar.bz2 busybox-w32-ca9c4653a95907e32674c2eb5dc3921dc8e6f1a0.zip | |
libbb: add sanity check in bb_arg_max()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/sysconf.c')
| -rw-r--r-- | libbb/sysconf.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libbb/sysconf.c b/libbb/sysconf.c index cfad9cdc0..8c1caef5c 100644 --- a/libbb/sysconf.c +++ b/libbb/sysconf.c | |||
| @@ -11,7 +11,15 @@ | |||
| 11 | #if !defined(bb_arg_max) | 11 | #if !defined(bb_arg_max) |
| 12 | unsigned FAST_FUNC bb_arg_max(void) | 12 | unsigned FAST_FUNC bb_arg_max(void) |
| 13 | { | 13 | { |
| 14 | return sysconf(_SC_ARG_MAX); | 14 | long r = sysconf(_SC_ARG_MAX); |
| 15 | |||
| 16 | /* I've seen a version of uclibc which returned -1. | ||
| 17 | * Guard about it, and also avoid insanely large values | ||
| 18 | */ | ||
| 19 | if ((unsigned long)r > 64*1024*1024) | ||
| 20 | r = 64*1024*1024; | ||
| 21 | |||
| 22 | return r; | ||
| 15 | } | 23 | } |
| 16 | #endif | 24 | #endif |
| 17 | 25 | ||