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do_coredump: fix the "ispipe" error check 

do_coredump() assumes that if format_corename() fails it should return
-ENOMEM.  This is not true, for example cn_print_exe_file() can propagate
the error from d_path.  Even if it was true, this is too fragile.  Change
the code to check "ispipe < 0".

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reviewed-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2011-07-26 16:08:34 -07:00 committed by Linus Torvalds
parent 2c563731fe
commit 99b6456748
1 changed files with 6 additions and 6 deletions
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12
fs/exec.c
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@ -2133,16 +2133,16 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs)
ispipe = format_corename(&cn, signr);
if (ispipe == -ENOMEM) {
printk(KERN_WARNING "format_corename failed\n");
printk(KERN_WARNING "Aborting core\n");
goto fail_corename;
}
if (ispipe) {
int dump_count;
char **helper_argv;
if (ispipe < 0) {
printk(KERN_WARNING "format_corename failed\n");
printk(KERN_WARNING "Aborting core\n");
goto fail_corename;
}
if (cprm.limit == 1) {
/*
* Normally core limits are irrelevant to pipes, since