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do_coredump(): check return from argv_split()

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do_coredump() accesses helper_argv[0] without checking helper_argv !=
NULL.  This can happen if page allocation failed.

Signed-off-by: Tetsuo Handa <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Tetsuo Handa 2009-01-06 14:41:11 -08:00 • committed by Linus Torvalds
commit 350eaf791b
1 changed files with 5 additions and 0 deletions
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5
fs/exec.c
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@ -1770,6 +1770,11 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
if (ispipe) {
helper_argv = argv_split(GFP_KERNEL, corename+1, &helper_argc);
if (!helper_argv) {
printk(KERN_WARNING "%s failed to allocate memory\n",
__func__);
goto fail_unlock;
}
/* Terminate the string before the first option */
delimit = strchr(corename, ' ');
if (delimit)