1 files changed, 18 insertions, 5 deletions

diff --git a/fs/exec.c b/fs/exec.c
index 0db3fc3c5f0f..6270f8f20a63 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -58,7 +58,7 @@
 #endif
 
 int core_uses_pid;
-char core_pattern[65] = "core";
+char core_pattern[128] = "core";
 int suid_dumpable = 0;
 
 EXPORT_SYMBOL(suid_dumpable);
@@ -1463,6 +1463,7 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
         int retval = 0;
         int fsuid = current->fsuid;
         int flag = 0;
+        int ispipe = 0;
 
         binfmt = current->binfmt;
         if (!binfmt || !binfmt->core_dump)
@@ -1504,22 +1505,34 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
         lock_kernel();
         format_corename(corename, core_pattern, signr);
         unlock_kernel();
-        file = filp_open(corename, O_CREAT | 2 | O_NOFOLLOW | O_LARGEFILE | flag, 0600);
+        if (corename[0] == '|') {
+                /* SIGPIPE can happen, but it's just never processed */
+                if(call_usermodehelper_pipe(corename+1, NULL, NULL, &file)) {
+                        printk(KERN_INFO "Core dump to %s pipe failed\n",
+                               corename);
+                        goto fail_unlock;
+                }
+                ispipe = 1;
+        } else
+                file = filp_open(corename,
+                                 O_CREAT | 2 | O_NOFOLLOW | O_LARGEFILE, 0600);
         if (IS_ERR(file))
                 goto fail_unlock;
         inode = file->f_dentry->d_inode;
         if (inode->i_nlink > 1)
                 goto close_fail;        /* multiple links - don't dump */
-        if (d_unhashed(file->f_dentry))
+        if (!ispipe && d_unhashed(file->f_dentry))
                 goto close_fail;
 
-        if (!S_ISREG(inode->i_mode))
+        /* AK: actually i see no reason to not allow this for named pipes etc.,
+           but keep the previous behaviour for now. */
+        if (!ispipe && !S_ISREG(inode->i_mode))
                 goto close_fail;
         if (!file->f_op)
                 goto close_fail;
         if (!file->f_op->write)
                 goto close_fail;
-        if (do_truncate(file->f_dentry, 0, 0, file) != 0)
+        if (!ispipe && do_truncate(file->f_dentry, 0, 0, file) != 0)
                 goto close_fail;
 
         retval = binfmt->core_dump(signr, regs, file);