From 12a2b4b2241e318b4f6df31228e4272d2c2968a1 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Thu, 4 Oct 2012 17:15:25 -0700 Subject: coredump: add support for %d=__get_dumpable() in core name Some coredump handlers want to create a core file in a way compatible with standard behavior. Standard behavior with fs.suid_dumpable = 2 is to create core file with uid=gid=0. However, there was no way for coredump handler to know that the process being dumped was suid'ed. This patch adds the new %d specifier for format_corename() which simply reports __get_dumpable(mm->flags), this is compatible with /proc/sys/fs/suid_dumpable we already have. Addresses https://bugzilla.redhat.com/show_bug.cgi?id=787135 Developed during a discussion with Denys Vlasenko. Signed-off-by: Oleg Nesterov Cc: Denys Vlasenko Cc: Alex Kelly Cc: Andi Kleen Cc: Cong Wang Cc: Jiri Moskovcak Acked-by: Neil Horman Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/sysctl/kernel.txt | 2 ++ 1 file changed, 2 insertions(+) (limited to 'Documentation') diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index 6d78841fd41..2907ba6c360 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -181,6 +181,8 @@ core_pattern is used to specify a core dumpfile pattern name. %p pid %u uid %g gid + %d dump mode, matches PR_SET_DUMPABLE and + /proc/sys/fs/suid_dumpable %s signal number %t UNIX time of dump %h hostname -- cgit v1.2.3