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authorRichard Weinberger <richard@nod.at>2013-08-18 13:30:08 +0200
committerRichard Weinberger <richard@nod.at>2013-09-07 10:56:58 +0200
commit91d44ff860a9e9c0db81a89cbc24fa31fbd8e6d3 (patch)
treebb14601ab3afbcec3cb8d7d0f207d09cfc792268 /arch/um/drivers
parentbc1d72e73be63a7c4a07eb10cf51e91f20bf6076 (diff)
downloadlinux-91d44ff860a9e9c0db81a89cbc24fa31fbd8e6d3.tar.bz2
um: Cleanup SIGTERM handling
Richard reported that some UML processes survive if the UML main process receives a SIGTERM. This issue was caused by a wrongly placed signal(SIGTERM, SIG_DFL) in init_new_thread_signals(). It disabled the UML exit handler accidently for some processes. The correct solution is to disable the fatal handler for all UML helper threads/processes. Such that last_ditch_exit() does not get called multiple times and all processes can exit due to SIGTERM. Reported-and-tested-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/drivers')
-rw-r--r--arch/um/drivers/ubd.h1
-rw-r--r--arch/um/drivers/ubd_kern.c3
-rw-r--r--arch/um/drivers/ubd_user.c5
3 files changed, 2 insertions, 7 deletions
diff --git a/arch/um/drivers/ubd.h b/arch/um/drivers/ubd.h
index 3845051f1b10..3b48cd2081ee 100644
--- a/arch/um/drivers/ubd.h
+++ b/arch/um/drivers/ubd.h
@@ -7,7 +7,6 @@
#ifndef __UM_UBD_USER_H
#define __UM_UBD_USER_H
-extern void ignore_sigwinch_sig(void);
extern int start_io_thread(unsigned long sp, int *fds_out);
extern int io_thread(void *arg);
extern int kernel_fd;
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 1812bc81715b..3716e6952554 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -1476,7 +1476,8 @@ int io_thread(void *arg)
struct io_thread_req *req;
int n;
- ignore_sigwinch_sig();
+ os_fix_helper_signals();
+
while(1){
n = os_read_file(kernel_fd, &req,
sizeof(struct io_thread_req *));
diff --git a/arch/um/drivers/ubd_user.c b/arch/um/drivers/ubd_user.c
index a703e45d8aac..e376f9b9c68d 100644
--- a/arch/um/drivers/ubd_user.c
+++ b/arch/um/drivers/ubd_user.c
@@ -21,11 +21,6 @@
#include "ubd.h"
#include <os.h>
-void ignore_sigwinch_sig(void)
-{
- signal(SIGWINCH, SIG_IGN);
-}
-
int start_io_thread(unsigned long sp, int *fd_out)
{
int pid, fds[2], err;