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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-09 16:28:09 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-09 16:28:09 -0700 |
| commit | 5d44f4b3484e85c8d4527ecaca5e536da774ae21 (patch) | |
| tree | 5c699fd097844ecdf30ef9b47444064d713ac410 /arch/mips/kernel/traps.c | |
| parent | 4816693286d4ff9219b1cc72c2ab9c589448ebcb (diff) | |
| parent | f7644cbfcdf03528f0f450f3940c4985b2291f49 (diff) | |
| download | linux-5d44f4b3484e85c8d4527ecaca5e536da774ae21.tar.gz linux-5d44f4b3484e85c8d4527ecaca5e536da774ae21.tar.bz2 linux-5d44f4b3484e85c8d4527ecaca5e536da774ae21.zip | |
Merge 4.2-rc6 into char-misc-next
We want the fixes in Linus's tree in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/mips/kernel/traps.c')
| -rw-r--r-- | arch/mips/kernel/traps.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index e207a43b5f8f..8ea28e6ab37d 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -192,6 +192,7 @@ static void show_stacktrace(struct task_struct *task, void show_stack(struct task_struct *task, unsigned long *sp) { struct pt_regs regs; + mm_segment_t old_fs = get_fs(); if (sp) { regs.regs[29] = (unsigned long)sp; regs.regs[31] = 0; @@ -210,7 +211,13 @@ void show_stack(struct task_struct *task, unsigned long *sp) prepare_frametrace(®s); } } + /* + * show_stack() deals exclusively with kernel mode, so be sure to access + * the stack in the kernel (not user) address space. + */ + set_fs(KERNEL_DS); show_stacktrace(task, ®s); + set_fs(old_fs); } static void show_code(unsigned int __user *pc) @@ -1519,6 +1526,7 @@ asmlinkage void do_mcheck(struct pt_regs *regs) const int field = 2 * sizeof(unsigned long); int multi_match = regs->cp0_status & ST0_TS; enum ctx_state prev_state; + mm_segment_t old_fs = get_fs(); prev_state = exception_enter(); show_regs(regs); @@ -1540,8 +1548,13 @@ asmlinkage void do_mcheck(struct pt_regs *regs) dump_tlb_all(); } + if (!user_mode(regs)) + set_fs(KERNEL_DS); + show_code((unsigned int __user *) regs->cp0_epc); + set_fs(old_fs); + /* * Some chips may have other causes of machine check (e.g. SB1 * graduation timer) |