The patch titled
vdso: improve print_fatal_signals support by adding memory maps
has been added to the -mm tree. Its filename is
vdso-improve-print_fatal_signals-support-by-adding-memory-maps.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: vdso: improve print_fatal_signals support by adding memory maps
From: Ingo Molnar <mingo@xxxxxxx>
improved the print-fatal-signals debug output:
hotplug/825: potentially unexpected fatal signal 11.
code at ffffe400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
vDSO at b7f41000
Pid: 825, comm: hotplug
EIP: 0073:[<ffffe400>] CPU: 0
EIP is at 0xffffe400
ESP: 007b:bff52910 EFLAGS: 00010246 Not tainted (2.6.17-rc4 #91)
EAX: 000000af EBX: 00000000 ECX: 00000000 EDX: 080f341c
ESI: 00000008 EDI: 41c9eff4 EBP: bff529ac DS: 007b ES: 007b
CR0: 8005003b CR2: ffffe40f CR3: 372a3000 CR4: 00000680
[<c0103fad>] show_trace+0xd/0x10
[<c0101637>] show_regs+0x177/0x180
[<c0123d13>] get_signal_to_deliver+0x3f3/0x7d0
[<c010278c>] do_notify_resume+0x1bc/0x750
[<c0102ebe>] work_notifysig+0x13/0x19
08047000-080e9000 r-xp 00000000 03:01 3547392 /bin/bash
080e9000-080ef000 rw-p 000a1000 03:01 3547392 /bin/bash
080ef000-080f4000 rw-p 080ef000 00:00 0 [heap]
41b5a000-41b73000 r-xp 00000000 03:01 846154 /lib/ld-2.3.90.so
41b73000-41b74000 r--p 00018000 03:01 846154 /lib/ld-2.3.90.so
41b74000-41b75000 rw-p 00019000 03:01 846154 /lib/ld-2.3.90.so
41b77000-41c9d000 r-xp 00000000 03:01 846155 /lib/libc-2.3.90.so
41c9d000-41c9f000 r--p 00125000 03:01 846155 /lib/libc-2.3.90.so
41c9f000-41ca1000 rw-p 00127000 03:01 846155 /lib/libc-2.3.90.so
41ca1000-41ca3000 rw-p 41ca1000 00:00 0
41ccc000-41cce000 r-xp 00000000 03:01 846157 /lib/libdl-2.3.90.so
41cce000-41ccf000 r--p 00001000 03:01 846157 /lib/libdl-2.3.90.so
41ccf000-41cd0000 rw-p 00002000 03:01 846157 /lib/libdl-2.3.90.so
41dce000-41dd1000 r-xp 00000000 03:01 846175 /lib/libtermcap.so.2.0.8
41dd1000-41dd2000 rw-p 00002000 03:01 846175 /lib/libtermcap.so.2.0.8
b7f29000-b7f2a000 rw-p b7f29000 00:00 0
b7f40000-b7f41000 rw-p b7f40000 00:00 0
b7f41000-b7f42000 r-xp b7f41000 00:00 0 [vdso]
bff3e000-bff53000 rw-p bff3e000 00:00 0 [stack]
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Arjan van de Ven <arjan@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/signal.c | 97 +++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 95 insertions(+), 2 deletions(-)
diff -puN kernel/signal.c~vdso-improve-print_fatal_signals-support-by-adding-memory-maps kernel/signal.c
--- devel/kernel/signal.c~vdso-improve-print_fatal_signals-support-by-adding-memory-maps 2006-05-24 08:46:15.000000000 -0700
+++ devel-akpm/kernel/signal.c 2006-05-24 08:46:15.000000000 -0700
@@ -16,6 +16,7 @@
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <linux/sched.h>
+#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/tty.h>
#include <linux/binfmts.h>
@@ -763,7 +764,95 @@ out_set:
#define LEGACY_QUEUE(sigptr, sig) \
(((sig) < SIGRTMIN) && sigismember(&(sigptr)->signal, (sig)))
-int print_fatal_signals = 0;
+int print_fatal_signals;
+
+static void pad_len_spaces(int len)
+{
+ len = 25 + sizeof(void*) * 6 - len;
+
+ if (len < 1)
+ len = 1;
+
+ printk("%*c", len, ' ');
+}
+
+static int print_vma(struct vm_area_struct *vma)
+{
+ struct mm_struct *mm = vma->vm_mm;
+ struct file *file = vma->vm_file;
+ int flags = vma->vm_flags;
+ unsigned long ino = 0;
+ dev_t dev = 0;
+ int len;
+
+ if (file) {
+ struct inode *inode = vma->vm_file->f_dentry->d_inode;
+ dev = inode->i_sb->s_dev;
+ ino = inode->i_ino;
+ }
+
+ printk("%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
+ vma->vm_start,
+ vma->vm_end,
+ flags & VM_READ ? 'r' : '-',
+ flags & VM_WRITE ? 'w' : '-',
+ flags & VM_EXEC ? 'x' : '-',
+ flags & VM_MAYSHARE ? 's' : 'p',
+ vma->vm_pgoff << PAGE_SHIFT,
+ MAJOR(dev), MINOR(dev), ino, &len);
+
+ /*
+ * Print the dentry name for named mappings, and a
+ * special [heap] marker for the heap:
+ */
+ if (file) {
+#define SIZE 128
+ char tmp[SIZE], *str;
+
+ str = d_path(file->f_dentry, file->f_vfsmnt, tmp, SIZE);
+ while (str[0] && (str[0] == ' '))
+ str++;
+
+ pad_len_spaces(len);
+ printk("%s", str);
+ } else {
+ const char *name = arch_vma_name(vma);
+ if (!name) {
+ if (mm) {
+ if (vma->vm_start <= mm->start_brk &&
+ vma->vm_end >= mm->brk) {
+ name = "[heap]";
+ } else if (vma->vm_start <= mm->start_stack &&
+ vma->vm_end >= mm->start_stack) {
+ name = "[stack]";
+ }
+ } else {
+ name = "[vdso]";
+ }
+ }
+ if (name) {
+ pad_len_spaces(len);
+ printk(name);
+ }
+ }
+ printk("\n");
+
+ return 0;
+}
+
+static void print_vmas(void)
+{
+ struct vm_area_struct *vma;
+ struct mm_struct *mm = current->mm;
+
+ if (!mm)
+ return;
+
+ down_read(&mm->mmap_sem);
+ for (vma = mm->mmap; vma; vma = vma->vm_next)
+ print_vma(vma);
+ up_read(&mm->mmap_sem);
+}
static void print_fatal_signal(struct pt_regs *regs, int signr)
{
@@ -781,9 +870,13 @@ static void print_fatal_signal(struct pt
printk("%02x ", insn);
}
}
-#endif
printk("\n");
+ if (current->mm)
+ printk("vDSO at %p\n", current->mm->context.vdso);
+#endif
show_regs(regs);
+ printk("\n");
+ print_vmas();
}
static int __init setup_print_fatal_signals(char *str)
_
Patches currently in -mm which might be from mingo@xxxxxxx are
origin.patch
git-acpi.patch
fix-drivers-mfd-ucb1x00-corec-irq-probing-bug.patch
git-netdev-all.patch
fix-for-serial-uart-lockup.patch
qla2xxx-lock-ordering-fix.patch
qla2xxx-lock-ordering-fix-warning-fix.patch
swapless-pm-add-r-w-migration-entries-fix.patch
i386-break-out-of-recursion-in-stackframe-walk.patch
vdso-randomize-the-i386-vdso-by-moving-it-into-a-vma.patch
vdso-randomize-the-i386-vdso-by-moving-it-into-a-vma-tidy.patch
work-around-ppc64-bootup-bug-by-making-mutex-debugging-save-restore-irqs.patch
kernel-kernel-cpuc-to-mutexes.patch
cond-resched-might-sleep-fix.patch
define-__raw_get_cpu_var-and-use-it.patch
ide-cd-end-of-media-error-fix.patch
time-clocksource-infrastructure.patch
sched-comment-bitmap-size-accounting.patch
sched-fix-interactive-ceiling-code.patch
sched-implement-smpnice.patch
sched-protect-calculation-of-max_pull-from-integer-wrap.patch
sched-store-weighted-load-on-up.patch
sched-add-discrete-weighted-cpu-load-function.patch
sched-prevent-high-load-weight-tasks-suppressing-balancing.patch
sched-improve-stability-of-smpnice-load-balancing.patch
sched-improve-smpnice-load-balancing-when-load-per-task.patch
smpnice-dont-consider-sched-groups-which-are-lightly-loaded-for-balancing.patch
smpnice-dont-consider-sched-groups-which-are-lightly-loaded-for-balancing-fix.patch
sched-modify-move_tasks-to-improve-load-balancing-outcomes.patch
sched-avoid-unnecessarily-moving-highest-priority-task-move_tasks.patch
sched-avoid-unnecessarily-moving-highest-priority-task-move_tasks-fix-2.patch
sched_domain-handle-kmalloc-failure.patch
sched_domain-handle-kmalloc-failure-fix.patch
sched_domain-dont-use-gfp_atomic.patch
sched_domain-use-kmalloc_node.patch
sched_domain-allocate-sched_group-structures-dynamically.patch
sched-add-above-background-load-function.patch
mm-implement-swap-prefetching-fix.patch
pi-futex-futex-code-cleanups.patch
pi-futex-futex-code-cleanups-fix.patch
pi-futex-introduce-debug_check_no_locks_freed.patch
pi-futex-add-plist-implementation.patch
pi-futex-scheduler-support-for-pi.patch
pi-futex-rt-mutex-core.patch
pi-futex-rt-mutex-core-fix-timeout-race.patch
pi-futex-rt-mutex-docs.patch
pi-futex-rt-mutex-debug.patch
pi-futex-rt-mutex-tester.patch
pi-futex-rt-mutex-futex-api.patch
pi-futex-futex_lock_pi-futex_unlock_pi-support.patch
pi-futex-v2.patch
pi-futex-v3.patch
pi-futex-patchset-v4.patch
pi-futex-patchset-v4-update.patch
pi-futex-patchset-v4-fix.patch
rtmutex-remove-buggy-bug_on-in-pi-boosting-code.patch
futex-pi-enforce-waiter-bit-when-owner-died-is-detected.patch
rtmutex-debug-printk-correct-task-information.patch
futex-pi-make-use-of-restart_block-when-interrupted.patch
document-futex-pi-design.patch
futex_requeue-optimization.patch
reiser4.patch
genirq-rename-desc-handler-to-desc-chip.patch
genirq-rename-desc-handler-to-desc-chip-power-fix.patch
genirq-rename-desc-handler-to-desc-chip-ia64-fix.patch
genirq-sem2mutex-probe_sem-probing_active.patch
genirq-cleanup-merge-irq_affinity-into-irq_desc.patch
genirq-cleanup-remove-irq_descp.patch
genirq-cleanup-remove-fastcall.patch
genirq-cleanup-misc-code-cleanups.patch
genirq-cleanup-reduce-irq_desc_t-use-mark-it-obsolete.patch
genirq-cleanup-include-linux-irqh.patch
genirq-cleanup-merge-irq_dir-smp_affinity_entry-into-irq_desc.patch
genirq-cleanup-merge-pending_irq_cpumask-into-irq_desc.patch
genirq-cleanup-turn-arch_has_irq_per_cpu-into-config_irq_per_cpu.patch
genirq-debug-better-debug-printout-in-enable_irq.patch
genirq-add-retrigger-irq-op-to-consolidate-hw_irq_resend.patch
genirq-doc-comment-include-linux-irqh-structures.patch
genirq-doc-handle_irq_event-and-__do_irq-comments.patch
genirq-cleanup-no_irq_type-cleanups.patch
genirq-doc-add-design-documentation.patch
genirq-add-genirq-sw-irq-retrigger.patch
genirq-add-irq_noprobe-support.patch
genirq-add-irq_norequest-support.patch
genirq-add-irq_noautoen-support.patch
genirq-update-copyrights.patch
genirq-core.patch
genirq-add-irq-chip-support.patch
genirq-add-handle_bad_irq.patch
genirq-add-irq-wake-power-management-support.patch
genirq-add-sa_trigger-support.patch
genirq-cleanup-no_irq_type-no_irq_chip-rename.patch
genirq-convert-the-x86_64-architecture-to-irq-chips.patch
genirq-convert-the-i386-architecture-to-irq-chips.patch
genirq-more-verbose-debugging-on-unexpected-irq-vectors.patch
detect-atomic-counter-underflows.patch
debug-shared-irqs.patch
make-frame_pointer-default=y.patch
mutex-subsystem-synchro-test-module.patch
vdso-print-fatal-signals.patch
vdso-improve-print_fatal_signals-support-by-adding-memory-maps.patch
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