The patch titled
Subject: kernel/sys.c: avoid argv_free(NULL)
has been removed from the -mm tree. Its filename was
kernel-sysc-avoid-argv_freenull.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: kernel/sys.c: avoid argv_free(NULL)
If argv_split() failed, the code will end up calling argv_free(NULL). Fix
it up and clean things up a bit.
Addresses Coverity report 703573.
Cc: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Serge Hallyn <serge.hallyn@xxxxxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: WANG Cong <xiyou.wangcong@xxxxxxxxx>
Cc: Alan Cox <alan@xxxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/sys.c | 44 +++++++++++++++++++++++++-------------------
1 file changed, 25 insertions(+), 19 deletions(-)
diff -puN kernel/sys.c~kernel-sysc-avoid-argv_freenull kernel/sys.c
--- a/kernel/sys.c~kernel-sysc-avoid-argv_freenull
+++ a/kernel/sys.c
@@ -2186,46 +2186,52 @@ static void argv_cleanup(struct subproce
argv_free(info->argv);
}
-/**
- * orderly_poweroff - Trigger an orderly system poweroff
- * @force: force poweroff if command execution fails
- *
- * This may be called from any context to trigger a system shutdown.
- * If the orderly shutdown fails, it will force an immediate shutdown.
- */
-int orderly_poweroff(bool force)
+static int __orderly_poweroff(void)
{
int argc;
- char **argv = argv_split(GFP_ATOMIC, poweroff_cmd, &argc);
+ char **argv;
static char *envp[] = {
"HOME=/",
"PATH=/sbin:/bin:/usr/sbin:/usr/bin",
NULL
};
- int ret = -ENOMEM;
+ int ret;
+ argv = argv_split(GFP_ATOMIC, poweroff_cmd, &argc);
if (argv == NULL) {
printk(KERN_WARNING "%s failed to allocate memory for \"%s\"\n",
__func__, poweroff_cmd);
- goto out;
+ return -ENOMEM;
}
ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_NO_WAIT,
NULL, argv_cleanup, NULL);
-out:
- if (likely(!ret))
- return 0;
-
if (ret == -ENOMEM)
argv_free(argv);
- if (force) {
+ return ret;
+}
+
+/**
+ * orderly_poweroff - Trigger an orderly system poweroff
+ * @force: force poweroff if command execution fails
+ *
+ * This may be called from any context to trigger a system shutdown.
+ * If the orderly shutdown fails, it will force an immediate shutdown.
+ */
+int orderly_poweroff(bool force)
+{
+ int ret = __orderly_poweroff();
+
+ if (ret && force) {
printk(KERN_WARNING "Failed to start orderly shutdown: "
"forcing the issue\n");
- /* I guess this should try to kick off some daemon to
- sync and poweroff asap. Or not even bother syncing
- if we're doing an emergency shutdown? */
+ /*
+ * I guess this should try to kick off some daemon to sync and
+ * poweroff asap. Or not even bother syncing if we're doing an
+ * emergency shutdown?
+ */
emergency_sync();
kernel_power_off();
}
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
mm-make-vb_alloc-more-foolproof-fix.patch
mm-hugetlb-add-new-hugetlb-cgroup-fix.patch
mm-hugetlb-add-new-hugetlb-cgroup-fix-fix.patch
hugetlb-cgroup-add-hugetlb-cgroup-control-files-fix.patch
hugetlb-cgroup-add-hugetlb-cgroup-control-files-fix-fix.patch
mm-memblockc-memblock_double_array-cosmetic-cleanups.patch
memcg-make-mem_cgroup_force_empty_list-return-bool-fix.patch
mm-fadvise-dont-return-einval-when-filesystem-cannot-implement-fadvise-checkpatch-fixes.patch
memcg-rename-config-variables.patch
memcg-rename-config-variables-fix-fix.patch
mm-have-order-0-compaction-start-off-where-it-left-checkpatch-fixes.patch
mm-have-order-0-compaction-start-off-where-it-left-v3-typo.patch
memory-hotplug-fix-kswapd-looping-forever-problem-fix.patch
memory-hotplug-fix-kswapd-looping-forever-problem-fix-fix.patch
netvm-propagate-page-pfmemalloc-from-skb_alloc_page-to-skb-fix.patch
memcg-prevent-oom-with-too-many-dirty-pages.patch
memcg-add-mem_cgroup_from_css-helper-fix.patch
linux-next.patch
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
arch-x86-platform-iris-irisc-register-a-platform-device-and-a-platform-driver.patch
arch-x86-kernel-cpu-perf_event_intel_uncoreh-make-uncore_pmu_hrtimer_interval-64-bit.patch
thermal-add-generic-cpufreq-cooling-implementation.patch
thermal-exynos5-add-exynos5-thermal-sensor-driver-support.patch
thermal-exynos-register-the-tmu-sensor-with-the-kernel-thermal-layer.patch
mm-slab_commonc-fix-warning.patch
mm.patch
rbtree-performance-and-correctness-test-fix.patch
drivers-firmware-dmi_scanc-check-dmi-version-when-get-system-uuid-fix.patch
drivers-firmware-dmi_scanc-fetch-dmi-version-from-smbios-if-it-exists-checkpatch-fixes.patch
journal_add_journal_head-debug.patch
mutex-subsystem-synchro-test-module-fix.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
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