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authorMasoud Asgharifard Sharbiani <masouds@google.com>2007-07-22 11:12:28 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-22 11:03:37 -0700
commitabd4f7505bafdd6c5319fe3cb5caf9af6104e17a (patch)
treea543fce720331dbf6194a2c0471f36b7727b9736 /include/asm-x86_64
parent5fa63fccc579ac609fc7f86d29ccb3a2edf910d7 (diff)
downloadlinux-abd4f7505bafdd6c5319fe3cb5caf9af6104e17a.tar.gz
x86: i386-show-unhandled-signals-v3
This patch makes the i386 behave the same way that x86_64 does when a segfault happens. A line gets printed to the kernel log so that tools that need to check for failures can behave more uniformly between debug.show_unhandled_signals sysctl variable to 0 (or by doing echo 0 > /proc/sys/debug/exception-trace) Also, all of the lines being printed are now using printk_ratelimit() to deny the ability of DoS from a local user with a program like the following: main() { while (1) if (!fork()) *(int *)0 = 0; } This new revision also includes the fix that Andrew did which got rid of new sysctl that was added to the system in earlier versions of this. Also, 'show-unhandled-signals' sysctl has been renamed back to the old 'exception-trace' to avoid breakage of people's scripts. AK: Enabling by default for i386 will be likely controversal, but let's see what happens AK: Really folks, before complaining just fix your segfaults AK: I bet this will find a lot of silent issues Signed-off-by: Masoud Sharbiani <masouds@google.com> Signed-off-by: Andi Kleen <ak@suse.de> [ Personally, I've found the complaints useful on x86-64, so I'm all for this. That said, I wonder if we could do it more prettily.. -Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/proto.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/include/asm-x86_64/proto.h b/include/asm-x86_64/proto.h
index d6e3225549c..31f20ad6587 100644
--- a/include/asm-x86_64/proto.h
+++ b/include/asm-x86_64/proto.h
@@ -75,8 +75,6 @@ extern void setup_node_bootmem(int nodeid, unsigned long start, unsigned long en
extern void early_quirks(void);
extern void check_efer(void);
-extern int unhandled_signal(struct task_struct *tsk, int sig);
-
extern void select_idle_routine(const struct cpuinfo_x86 *c);
extern unsigned long table_start, table_end;