diff options
-rw-r--r-- | mm/mmap.c | 8 |
1 files changed, 7 insertions, 1 deletions
@@ -245,10 +245,16 @@ asmlinkage unsigned long sys_brk(unsigned long brk) | |||
245 | unsigned long rlim, retval; | 245 | unsigned long rlim, retval; |
246 | unsigned long newbrk, oldbrk; | 246 | unsigned long newbrk, oldbrk; |
247 | struct mm_struct *mm = current->mm; | 247 | struct mm_struct *mm = current->mm; |
248 | unsigned long min_brk; | ||
248 | 249 | ||
249 | down_write(&mm->mmap_sem); | 250 | down_write(&mm->mmap_sem); |
250 | 251 | ||
251 | if (brk < mm->start_brk) | 252 | #ifdef CONFIG_COMPAT_BRK |
253 | min_brk = mm->end_code; | ||
254 | #else | ||
255 | min_brk = mm->start_brk; | ||
256 | #endif | ||
257 | if (brk < min_brk) | ||
252 | goto out; | 258 | goto out; |
253 | 259 | ||
254 | /* | 260 | /* |