From 9860d1b08b082ffb54c4b7827c48c2728e12ba21 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Sun, 16 Nov 2008 12:04:13 +0100 Subject: parisc: __kernel_time_t is always long __kernel_time_t is always long on PA-RISC, irrespective of CONFIG_64BIT, hence move it out of the #ifdef CONFIG_64BIT / #else / #endif block. Signed-off-by: Geert Uytterhoeven Signed-off-by: Kyle McMartin --- arch/parisc/include/asm/posix_types.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/parisc/include/asm/posix_types.h b/arch/parisc/include/asm/posix_types.h index bb725a6630bb..00da29a340ba 100644 --- a/arch/parisc/include/asm/posix_types.h +++ b/arch/parisc/include/asm/posix_types.h @@ -24,13 +24,12 @@ typedef int __kernel_daddr_t; typedef unsigned long __kernel_size_t; typedef long __kernel_ssize_t; typedef long __kernel_ptrdiff_t; -typedef long __kernel_time_t; #else typedef unsigned int __kernel_size_t; typedef int __kernel_ssize_t; typedef int __kernel_ptrdiff_t; -typedef long __kernel_time_t; #endif +typedef long __kernel_time_t; typedef char * __kernel_caddr_t; typedef unsigned short __kernel_uid16_t; -- cgit v1.2.3 From 7a3f5134a8f5bd7fa38b5645eef05e8a4eb62951 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Wed, 26 Nov 2008 12:46:22 -0800 Subject: parisc: fix kernel crash when unwinding a userspace process Any user on existing parisc 32- and 64bit-kernels can easily crash the kernel and as such enforce a DSO. A simple testcase is available here: http://gsyprf10.external.hp.com/~deller/crash.tgz The problem is introduced by the fact, that the handle_interruption() crash handler calls the show_regs() function, which in turn tries to unwind the stack by calling parisc_show_stack(). Since the stack contains userspace addresses, a try to unwind the stack is dangerous and useless and leads to the crash. The fix is trivial: For userspace processes a) avoid to unwind the stack, and b) avoid to resolve userspace addresses to kernel symbol names. While touching this code, I converted print_symbol() to %pS printk formats and made parisc_show_stack() static. An initial patch for this was written by Kyle McMartin back in August: http://marc.info/?l=linux-parisc&m=121805168830283&w=2 Compile and run-tested with a 64bit parisc kernel. Signed-off-by: Helge Deller Cc: Grant Grundler Cc: Matthew Wilcox Cc: [2.6.25.x, 2.6.26.x, 2.6.27.x, earlier...] Signed-off-by: Andrew Morton Signed-off-by: Kyle McMartin --- arch/parisc/kernel/traps.c | 43 +++++++++++++++++++++---------------------- 1 file changed, 21 insertions(+), 22 deletions(-) diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c index 675f1d098f05..4c771cd580ec 100644 --- a/arch/parisc/kernel/traps.c +++ b/arch/parisc/kernel/traps.c @@ -24,7 +24,6 @@ #include #include #include -#include #include #include @@ -51,7 +50,7 @@ DEFINE_SPINLOCK(pa_dbit_lock); #endif -void parisc_show_stack(struct task_struct *t, unsigned long *sp, +static void parisc_show_stack(struct task_struct *task, unsigned long *sp, struct pt_regs *regs); static int printbinary(char *buf, unsigned long x, int nbits) @@ -121,18 +120,19 @@ static void print_fr(char *level, struct pt_regs *regs) void show_regs(struct pt_regs *regs) { - int i; + int i, user; char *level; unsigned long cr30, cr31; - level = user_mode(regs) ? KERN_DEBUG : KERN_CRIT; + user = user_mode(regs); + level = user ? KERN_DEBUG : KERN_CRIT; print_gr(level, regs); for (i = 0; i < 8; i += 4) PRINTREGS(level, regs->sr, "sr", RFMT, i); - if (user_mode(regs)) + if (user) print_fr(level, regs); cr30 = mfctl(30); @@ -145,14 +145,18 @@ void show_regs(struct pt_regs *regs) printk("%s CPU: %8d CR30: " RFMT " CR31: " RFMT "\n", level, current_thread_info()->cpu, cr30, cr31); printk("%s ORIG_R28: " RFMT "\n", level, regs->orig_r28); - printk(level); - print_symbol(" IAOQ[0]: %s\n", regs->iaoq[0]); - printk(level); - print_symbol(" IAOQ[1]: %s\n", regs->iaoq[1]); - printk(level); - print_symbol(" RP(r2): %s\n", regs->gr[2]); - - parisc_show_stack(current, NULL, regs); + + if (user) { + printk("%s IAOQ[0]: " RFMT "\n", level, regs->iaoq[0]); + printk("%s IAOQ[1]: " RFMT "\n", level, regs->iaoq[1]); + printk("%s RP(r2): " RFMT "\n", level, regs->gr[2]); + } else { + printk("%s IAOQ[0]: %pS\n", level, (void *) regs->iaoq[0]); + printk("%s IAOQ[1]: %pS\n", level, (void *) regs->iaoq[1]); + printk("%s RP(r2): %pS\n", level, (void *) regs->gr[2]); + + parisc_show_stack(current, NULL, regs); + } } @@ -173,20 +177,15 @@ static void do_show_stack(struct unwind_frame_info *info) break; if (__kernel_text_address(info->ip)) { - printk("%s [<" RFMT ">] ", (i&0x3)==1 ? KERN_CRIT : "", info->ip); -#ifdef CONFIG_KALLSYMS - print_symbol("%s\n", info->ip); -#else - if ((i & 0x03) == 0) - printk("\n"); -#endif + printk(KERN_CRIT " [<" RFMT ">] %pS\n", + info->ip, (void *) info->ip); i++; } } - printk("\n"); + printk(KERN_CRIT "\n"); } -void parisc_show_stack(struct task_struct *task, unsigned long *sp, +static void parisc_show_stack(struct task_struct *task, unsigned long *sp, struct pt_regs *regs) { struct unwind_frame_info info; -- cgit v1.2.3 From 90f671301a5e2678cdc99f611cd842161c3bb87f Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Fri, 7 Nov 2008 01:42:46 +0100 Subject: parisc: struct device - replace bus_id with dev_name(), dev_set_name() (I did not compile or test it, please let me know, or help fixing it, if something is wrong with the conversion) This patch is part of a larger patch series which will remove the "char bus_id[20]" name string from struct device. The device name is managed in the kobject anyway, and without any size limitation, and just needlessly copied into "struct device". To set and read the device name dev_name(dev) and dev_set_name(dev) must be used. If your code uses static kobjects, which it shouldn't do, "const char *init_name" can be used to statically provide the name the registered device should have. At registration time, the init_name field is cleared, to enforce the use of dev_name(dev) to access the device name at a later time. We need to get rid of all occurrences of bus_id in the entire tree to be able to enable the new interface. Please apply this patch, and possibly convert any remaining remaining occurrences of bus_id. We want to submit a patch to -next, which will remove bus_id from "struct device", to find the remaining pieces to convert, and finally switch over to the new api, which will remove the 20 bytes array and does no longer have a size limitation. Thanks, Kay Cc: Matthew Wilcox Cc: linux-parisc@vger.kernel.org Acked-by: Greg Kroah-Hartman Signed-off-by: Kay Sievers Signed-off-by: Kyle McMartin --- arch/parisc/include/asm/parisc-device.h | 4 ++-- arch/parisc/kernel/drivers.c | 6 ++++-- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/parisc/include/asm/parisc-device.h b/arch/parisc/include/asm/parisc-device.h index 7aa13f2add7a..9afdad6c2ffb 100644 --- a/arch/parisc/include/asm/parisc-device.h +++ b/arch/parisc/include/asm/parisc-device.h @@ -42,9 +42,9 @@ struct parisc_driver { #define to_parisc_driver(d) container_of(d, struct parisc_driver, drv) #define parisc_parent(d) to_parisc_device(d->dev.parent) -static inline char *parisc_pathname(struct parisc_device *d) +static inline const char *parisc_pathname(struct parisc_device *d) { - return d->dev.bus_id; + return dev_name(&d->dev); } static inline void diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c index 2ca654bd6322..884b7ce16a3b 100644 --- a/arch/parisc/kernel/drivers.c +++ b/arch/parisc/kernel/drivers.c @@ -43,7 +43,7 @@ struct hppa_dma_ops *hppa_dma_ops __read_mostly; EXPORT_SYMBOL(hppa_dma_ops); static struct device root = { - .bus_id = "parisc", + .init_name = "parisc", }; static inline int check_dev(struct device *dev) @@ -393,7 +393,8 @@ EXPORT_SYMBOL(print_pci_hwpath); static void setup_bus_id(struct parisc_device *padev) { struct hardware_path path; - char *output = padev->dev.bus_id; + char name[20]; + char *output = name; int i; get_node_path(padev->dev.parent, &path); @@ -404,6 +405,7 @@ static void setup_bus_id(struct parisc_device *padev) output += sprintf(output, "%u:", (unsigned char) path.bc[i]); } sprintf(output, "%u", (unsigned char) padev->hw_path); + dev_set_name(&padev->dev, name); } struct parisc_device * create_tree_node(char id, struct device *parent) -- cgit v1.2.3