Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | "Tobin C. Harding" <> | Subject | [kernel-hardening] [RFC V2 2/6] lib: vsprintf: whitelist stack traces | Date | Sun, 1 Oct 2017 11:06:46 +1100 |
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Use the %pP functionality to explicitly allow kernel pointers to be logged for stack traces.
Signed-off-by: Tobin C. Harding <me@tobin.cc> --- arch/arm64/kernel/traps.c | 4 ++-- kernel/printk/printk.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 5ea4b85..fe09660 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -147,7 +147,7 @@ void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk) struct stackframe frame; int skip; - pr_debug("%s(regs = %p tsk = %p)\n", __func__, regs, tsk); + pr_debug("%s(regs = %pP tsk = %pP)\n", __func__, regs, tsk); if (!tsk) tsk = current; @@ -233,7 +233,7 @@ static int __die(const char *str, int err, struct pt_regs *regs) print_modules(); __show_regs(regs); - pr_emerg("Process %.*s (pid: %d, stack limit = 0x%p)\n", + pr_emerg("Process %.*s (pid: %d, stack limit = 0x%pP)\n", TASK_COMM_LEN, tsk->comm, task_pid_nr(tsk), end_of_stack(tsk)); diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 512f7c2..af0bc8e 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -3142,7 +3142,7 @@ void show_regs_print_info(const char *log_lvl) { dump_stack_print_info(log_lvl); - printk("%stask: %p task.stack: %p\n", + printk("%stask: %pP task.stack: %pP\n", log_lvl, current, task_stack_page(current)); } -- 2.7.4
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