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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-17 14:35:02 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-17 14:35:02 -0800
commite2b74f232e84dfccd0047eb47545b1d028df8ff1 (patch)
tree86dffe011c9b4049f2adfa7aa78ad92870c4dc9b /kernel
parent9cd77374f0a9cbb7ec35a9aaeb6473755afe0e3e (diff)
parent580c57f1076872ebc2427f898b927944ce170f2d (diff)
downloadlinux-e2b74f232e84dfccd0047eb47545b1d028df8ff1.tar.bz2
Merge branch 'akpm' (patches from Andrew)
Merge yet more updates from Andrew Morton: - a pile of minor fs fixes and cleanups - kexec updates - random misc fixes in various places: vmcore, rbtree, eventfd, ipc, seccomp. - a series of python-based kgdb helper scripts * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (58 commits) seccomp: cap SECCOMP_RET_ERRNO data to MAX_ERRNO samples/seccomp: improve label helper ipc,sem: use current->state helpers scripts/gdb: disable pagination while printing from breakpoint handler scripts/gdb: define maintainer scripts/gdb: convert CpuList to generator function scripts/gdb: convert ModuleList to generator function scripts/gdb: use a generator instead of iterator for task list scripts/gdb: ignore byte-compiled python files scripts/gdb: port to python3 / gdb7.7 scripts/gdb: add basic documentation scripts/gdb: add lx-lsmod command scripts/gdb: add class to iterate over CPU masks scripts/gdb: add lx_current convenience function scripts/gdb: add internal helper and convenience function for per-cpu lookup scripts/gdb: add get_gdbserver_type helper scripts/gdb: add internal helper and convenience function to retrieve thread_info scripts/gdb: add is_target_arch helper scripts/gdb: add helper and convenience function to look up tasks scripts/gdb: add task iteration class ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/kexec.c23
-rw-r--r--kernel/module.c9
-rw-r--r--kernel/ptrace.c1
-rw-r--r--kernel/seccomp.c4
-rw-r--r--kernel/signal.c4
5 files changed, 23 insertions, 18 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c
index c85277639b34..38c25b1f2fd5 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -444,7 +444,7 @@ arch_kexec_apply_relocations(const Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
}
/*
- * Free up memory used by kernel, initrd, and comand line. This is temporary
+ * Free up memory used by kernel, initrd, and command line. This is temporary
* memory allocation which is not needed any more after these buffers have
* been loaded into separate segments and have been copied elsewhere.
*/
@@ -856,8 +856,6 @@ static int kimage_set_destination(struct kimage *image,
destination &= PAGE_MASK;
result = kimage_add_entry(image, destination | IND_DESTINATION);
- if (result == 0)
- image->destination = destination;
return result;
}
@@ -869,8 +867,6 @@ static int kimage_add_page(struct kimage *image, unsigned long page)
page &= PAGE_MASK;
result = kimage_add_entry(image, page | IND_SOURCE);
- if (result == 0)
- image->destination += PAGE_SIZE;
return result;
}
@@ -1288,19 +1284,22 @@ SYSCALL_DEFINE4(kexec_load, unsigned long, entry, unsigned long, nr_segments,
if (nr_segments > 0) {
unsigned long i;
- /* Loading another kernel to reboot into */
- if ((flags & KEXEC_ON_CRASH) == 0)
- result = kimage_alloc_init(&image, entry, nr_segments,
- segments, flags);
- /* Loading another kernel to switch to if this one crashes */
- else if (flags & KEXEC_ON_CRASH) {
- /* Free any current crash dump kernel before
+ if (flags & KEXEC_ON_CRASH) {
+ /*
+ * Loading another kernel to switch to if this one
+ * crashes. Free any current crash dump kernel before
* we corrupt it.
*/
+
kimage_free(xchg(&kexec_crash_image, NULL));
result = kimage_alloc_init(&image, entry, nr_segments,
segments, flags);
crash_map_reserved_pages();
+ } else {
+ /* Loading another kernel to reboot into. */
+
+ result = kimage_alloc_init(&image, entry, nr_segments,
+ segments, flags);
}
if (result)
goto out;
diff --git a/kernel/module.c b/kernel/module.c
index 8426ad48362c..b34813f725e9 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -3025,8 +3025,13 @@ static void do_free_init(struct rcu_head *head)
kfree(m);
}
-/* This is where the real work happens */
-static int do_init_module(struct module *mod)
+/*
+ * This is where the real work happens.
+ *
+ * Keep it uninlined to provide a reliable breakpoint target, e.g. for the gdb
+ * helper command 'lx-symbols'.
+ */
+static noinline int do_init_module(struct module *mod)
{
int ret = 0;
struct mod_initfree *freeinit;
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 1eb9d90c3af9..227fec36b12a 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -1077,7 +1077,6 @@ int generic_ptrace_pokedata(struct task_struct *tsk, unsigned long addr,
}
#if defined CONFIG_COMPAT
-#include <linux/compat.h>
int compat_ptrace_request(struct task_struct *child, compat_long_t request,
compat_ulong_t addr, compat_ulong_t data)
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 4ef9687ac115..4f44028943e6 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -629,7 +629,9 @@ static u32 __seccomp_phase1_filter(int this_syscall, struct seccomp_data *sd)
switch (action) {
case SECCOMP_RET_ERRNO:
- /* Set the low-order 16-bits as a errno. */
+ /* Set low-order bits as an errno, capped at MAX_ERRNO. */
+ if (data > MAX_ERRNO)
+ data = MAX_ERRNO;
syscall_set_return_value(current, task_pt_regs(current),
-data, 0);
goto skip;
diff --git a/kernel/signal.c b/kernel/signal.c
index 33a52759cc0e..a390499943e4 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3550,7 +3550,7 @@ SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler)
SYSCALL_DEFINE0(pause)
{
while (!signal_pending(current)) {
- current->state = TASK_INTERRUPTIBLE;
+ __set_current_state(TASK_INTERRUPTIBLE);
schedule();
}
return -ERESTARTNOHAND;
@@ -3563,7 +3563,7 @@ int sigsuspend(sigset_t *set)
current->saved_sigmask = current->blocked;
set_current_blocked(set);
- current->state = TASK_INTERRUPTIBLE;
+ __set_current_state(TASK_INTERRUPTIBLE);
schedule();
set_restore_sigmask();
return -ERESTARTNOHAND;