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| author | James Morris | 2012-09-28 05:37:32 +0200 |
|---|---|---|
| committer | James Morris | 2012-09-28 05:37:32 +0200 |
| commit | bf5308344527d015ac9a6d2bda4ad4d40fd7d943 (patch) | |
| tree | 566e61e2cfc648c374d15cfc8c661b73e1a471f8 /arch/arm/kernel/traps.c | |
| parent | Merge branch 'for-1209' of git://gitorious.org/smack-next/kernel into next (diff) | |
| parent | Linux 3.6-rc7 (diff) | |
| download | kernel-qcow2-linux-bf5308344527d015ac9a6d2bda4ad4d40fd7d943.tar.gz kernel-qcow2-linux-bf5308344527d015ac9a6d2bda4ad4d40fd7d943.tar.xz kernel-qcow2-linux-bf5308344527d015ac9a6d2bda4ad4d40fd7d943.zip | |
Merge tag 'v3.6-rc7' into next
Linux 3.6-rc7
Requested by David Howells so he can merge his key susbsystem work into
my tree with requisite -linus changesets.
Diffstat (limited to 'arch/arm/kernel/traps.c')
| -rw-r--r-- | arch/arm/kernel/traps.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index f7945218b8c6..b0179b89a04c 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -420,20 +420,23 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) #endif instr = *(u32 *) pc; } else if (thumb_mode(regs)) { - get_user(instr, (u16 __user *)pc); + if (get_user(instr, (u16 __user *)pc)) + goto die_sig; if (is_wide_instruction(instr)) { unsigned int instr2; - get_user(instr2, (u16 __user *)pc+1); + if (get_user(instr2, (u16 __user *)pc+1)) + goto die_sig; instr <<= 16; instr |= instr2; } - } else { - get_user(instr, (u32 __user *)pc); + } else if (get_user(instr, (u32 __user *)pc)) { + goto die_sig; } if (call_undef_hook(regs, instr) == 0) return; +die_sig: #ifdef CONFIG_DEBUG_USER if (user_debug & UDBG_UNDEFINED) { printk(KERN_INFO "%s (%d): undefined instruction: pc=%p\n", |