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Commit 92515da7 authored by Jeff Dike's avatar Jeff Dike Committed by Linus Torvalds
Browse files

[PATCH] uml: fix segfault on exit with CONFIG_GCOV 



We need to disable signals on exit in all cases, not just when rebooting.

Signed-off-by: default avatarJeff Dike <jdike@addtoit.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 0894e27e

arch/um/kernel/main.c

+20 −18
Original line number Diff line number Diff line
@@ -87,7 +87,7 @@ int main(int argc, char **argv, char **envp) 
{

	char **new_argv;

	sigset_t mask;

	int ret, i;

	int ret, i, err;



	/* Enable all signals except SIGIO - in some environments, we can

	 * enter with some signals blocked
@@ -160,11 +160,11 @@ int main(int argc, char **argv, char **envp) 
	 */

	change_sig(SIGPROF, 0);



	/* Reboot */

	if(ret){

		int err;



		printf("\n");

        /* This signal stuff used to be in the reboot case.  However,

         * sometimes a SIGVTALRM can come in when we're halting (reproducably

         * when writing out gcov information, presumably because that takes

         * some time) and cause a segfault.

         */



        /* stop timers and set SIG*ALRM to be ignored */

        disable_timer();
@@ -172,8 +172,7 @@ int main(int argc, char **argv, char **envp) 
        /* disable SIGIO for the fds and set SIGIO to be ignored */

        err = deactivate_all_fds();

        if(err)

			printf("deactivate_all_fds failed, errno = %d\n",

			       -err);

                printf("deactivate_all_fds failed, errno = %d\n", -err);



        /* Let any pending signals fire now.  This ensures

         * that they won't be delivered after the exec, when
@@ -181,6 +180,9 @@ int main(int argc, char **argv, char **envp) 
         */

        unblock_signals();



	/* Reboot */

	if(ret){

		printf("\n");

		execvp(new_argv[0], new_argv);

		perror("Failed to exec kernel");

		ret = 1;