From 1134723e96f6e2abcf8bfd7a2d1c96fcc323ef35 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 14 Jan 2009 14:13:56 +0100 Subject: [CVE-2009-0029] Remove __attribute__((weak)) from sys_pipe/sys_pipe2 Remove __attribute__((weak)) from common code sys_pipe implemantation. IA64, ALPHA, SUPERH (32bit) and SPARC (32bit) have own implemantations with the same name. Just rename them. For sys_pipe2 there is no architecture specific implementation. Cc: Richard Henderson Cc: David S. Miller Cc: Paul Mundt Cc: Tony Luck Signed-off-by: Heiko Carstens --- arch/ia64/kernel/entry.S | 2 +- arch/ia64/kernel/sys_ia64.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/ia64/kernel') diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S index d435f4a7a96..e5341e2c117 100644 --- a/arch/ia64/kernel/entry.S +++ b/arch/ia64/kernel/entry.S @@ -1442,7 +1442,7 @@ sys_call_table: data8 sys_mkdir // 1055 data8 sys_rmdir data8 sys_dup - data8 sys_pipe + data8 sys_ia64_pipe data8 sys_times data8 ia64_brk // 1060 data8 sys_setgid diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c index bcbb6d8792d..92ed83f3403 100644 --- a/arch/ia64/kernel/sys_ia64.c +++ b/arch/ia64/kernel/sys_ia64.c @@ -154,7 +154,7 @@ out: * and r9) as this is faster than doing a copy_to_user(). */ asmlinkage long -sys_pipe (void) +sys_ia64_pipe (void) { struct pt_regs *regs = task_pt_regs(current); int fd[2]; -- cgit v1.2.3 From 88fc241f54459ac3d86c5e13b449730199f66061 Mon Sep 17 00:00:00 2001 From: Doug Chapman Date: Thu, 15 Jan 2009 10:38:56 -0800 Subject: [IA64] dump stack on kernel unaligned warnings Often the cause of kernel unaligned access warnings is not obvious from just the ip displayed in the warning. This adds the option via proc to dump the stack in addition to the warning. The default is off (just display the 1 line warning). To enable the stack to be shown: echo 1 > /proc/sys/kernel/unaligned-dump-stack Signed-off-by: Doug Chapman Signed-off-by: Tony Luck --- arch/ia64/kernel/unaligned.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'arch/ia64/kernel') diff --git a/arch/ia64/kernel/unaligned.c b/arch/ia64/kernel/unaligned.c index ff0e7c10faa..6db08599ebb 100644 --- a/arch/ia64/kernel/unaligned.c +++ b/arch/ia64/kernel/unaligned.c @@ -59,6 +59,7 @@ dump (const char *str, void *vp, size_t len) * (i.e. don't allow attacker to fill up logs with unaligned accesses). */ int no_unaligned_warning; +int unaligned_dump_stack; static int noprint_warning; /* @@ -1371,9 +1372,12 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs) } } } else { - if (within_logging_rate_limit()) + if (within_logging_rate_limit()) { printk(KERN_WARNING "kernel unaligned access to 0x%016lx, ip=0x%016lx\n", ifa, regs->cr_iip + ipsr->ri); + if (unaligned_dump_stack) + dump_stack(); + } set_fs(KERNEL_DS); } -- cgit v1.2.3 From 5a4ccaf37ffece09ef33f1cfec67efa8ee56f967 Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Tue, 6 Jan 2009 21:15:32 +0100 Subject: kprobes: check CONFIG_FREEZER instead of CONFIG_PM Check CONFIG_FREEZER instead of CONFIG_PM because kprobe booster depends on freeze_processes() and thaw_processes() when CONFIG_PREEMPT=y. This fixes a linkage error which occurs when CONFIG_PREEMPT=y, CONFIG_PM=y and CONFIG_FREEZER=n. Reported-by: Cheng Renquan Signed-off-by: Masami Hiramatsu Signed-off-by: Rafael J. Wysocki Acked-by: Ingo Molnar Signed-off-by: Len Brown --- arch/ia64/kernel/kprobes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/ia64/kernel') diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c index f90be51b112..9adac441ac9 100644 --- a/arch/ia64/kernel/kprobes.c +++ b/arch/ia64/kernel/kprobes.c @@ -870,7 +870,7 @@ static int __kprobes pre_kprobes_handler(struct die_args *args) return 1; ss_probe: -#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PM) +#if !defined(CONFIG_PREEMPT) || defined(CONFIG_FREEZER) if (p->ainsn.inst_flag == INST_FLAG_BOOSTABLE && !p->post_handler) { /* Boost up -- we can execute copied instructions directly */ ia64_psr(regs)->ri = p->ainsn.slot; -- cgit v1.2.3