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| author | Oleg Nesterov <oleg@redhat.com> | 2012-10-04 17:15:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-06 03:05:15 +0900 |
| commit | 12a2b4b2241e318b4f6df31228e4272d2c2968a1 (patch) | |
| tree | 569ce8d4d64fa163a997d98fb9dd20d275c72068 /Documentation | |
| parent | 179899fd5dc780fe3bcd44d0eb7823e3d855c855 (diff) | |
| download | linux-12a2b4b2241e318b4f6df31228e4272d2c2968a1.tar.bz2 | |
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 <oleg@redhat.com>
Cc: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Alex Kelly <alex.page.kelly@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Cong Wang <amwang@redhat.com>
Cc: Jiri Moskovcak <jmoskovc@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/sysctl/kernel.txt | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index 6d78841fd416..2907ba6c3607 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 |