diff options
Diffstat (limited to 'kernel/signal.c')
| -rw-r--r-- | kernel/signal.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index f9405609774e..39d122753bac 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -718,6 +718,37 @@ out_set: #define LEGACY_QUEUE(sigptr, sig) \ (((sig) < SIGRTMIN) && sigismember(&(sigptr)->signal, (sig))) +int print_fatal_signals; + +static void print_fatal_signal(struct pt_regs *regs, int signr) +{ + printk("%s/%d: potentially unexpected fatal signal %d.\n", + current->comm, current->pid, signr); + +#ifdef __i386__ + printk("code at %08lx: ", regs->eip); + { + int i; + for (i = 0; i < 16; i++) { + unsigned char insn; + + __get_user(insn, (unsigned char *)(regs->eip + i)); + printk("%02x ", insn); + } + } +#endif + printk("\n"); + show_regs(regs); +} + +static int __init setup_print_fatal_signals(char *str) +{ + get_option (&str, &print_fatal_signals); + + return 1; +} + +__setup("print-fatal-signals=", setup_print_fatal_signals); static int specific_send_sig_info(int sig, struct siginfo *info, struct task_struct *t) @@ -1855,6 +1886,8 @@ relock: * Anything else is fatal, maybe with a core dump. */ current->flags |= PF_SIGNALED; + if ((signr != SIGKILL) && print_fatal_signals) + print_fatal_signal(regs, signr); if (sig_kernel_coredump(signr)) { /* * If it was able to dump core, this kills all |