diff options
Diffstat (limited to 'openssh-7.2p2-s390-closefrom.patch')
| -rw-r--r-- | openssh-7.2p2-s390-closefrom.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/openssh-7.2p2-s390-closefrom.patch b/openssh-7.2p2-s390-closefrom.patch new file mode 100644 index 0000000..363538c --- /dev/null +++ b/openssh-7.2p2-s390-closefrom.patch @@ -0,0 +1,52 @@ +Zseries only: Leave the hardware filedescriptors open. + +All filedescriptors above 2 are getting closed when a new +sshd process to handle a new client connection is +spawned. As the process also chroot into an empty filesystem +without any device nodes, there is no chance to reopen the +files. This patch filters out the reqired fds in the +closefrom function so these are skipped in the close loop. + +Author: Harald Freudenberger <freude@de.ibm.com> + +--- + openbsd-compat/bsd-closefrom.c | 26 ++++++++++++++++++++++++++ + 1 file changed, 26 insertions(+) + +--- a/openbsd-compat/bsd-closefrom.c ++++ b/openbsd-compat/bsd-closefrom.c +@@ -82,7 +82,33 @@ closefrom(int lowfd) + fd = strtol(dent->d_name, &endp, 10); + if (dent->d_name != endp && *endp == '\0' && + fd >= 0 && fd < INT_MAX && fd >= lowfd && fd != dirfd(dirp)) ++#ifdef __s390__ ++ { ++ /* ++ * the filedescriptors used to communicate with ++ * the device drivers to provide hardware support ++ * should survive. HF <freude@de.ibm.com> ++ */ ++ char fpath[PATH_MAX], lpath[PATH_MAX]; ++ len = snprintf(fpath, sizeof(fpath), "%s/%s", ++ fdpath, dent->d_name); ++ if (len > 0 && (size_t)len <= sizeof(fpath)) { ++ len = readlink(fpath, lpath, sizeof(lpath)); ++ if (len > 0) { ++ lpath[len] = 0; ++ if (strstr(lpath, "dev/z90crypt") ++ || strstr(lpath, "dev/zcrypt") ++ || strstr(lpath, "dev/prandom") ++ || strstr(lpath, "dev/shm/icastats")) ++ fd = -1; ++ } ++ } ++ if (fd >= 0) ++ (void) close((int) fd); ++ } ++#else + (void) close((int) fd); ++#endif + } + (void) closedir(dirp); + return; + |