diff options
| author |   Taras Kondratiuk <taras.kondratiuk@linaro.org> | 2014-01-10 01:36:00 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2014-01-11 12:06:59 +0000 |
| commit | d6cd989477e2fee29ccda257614ef7b2621d0601 (patch) | |
| tree | 7abdd9c40c80eb2b44352d6c7c200e5dad83f26b /arch | |
| parent | ARM: 7937/1: perf_event: Silence sparse warning (diff) | |
| download | linux-dev-d6cd989477e2fee29ccda257614ef7b2621d0601.tar.xz linux-dev-d6cd989477e2fee29ccda257614ef7b2621d0601.zip | |
ARM: 7939/1: traps: fix opcode endianness when read from user memory
Currently code has an inverted logic: opcode from user memory
is swapped to a proper endianness only in case of read error.
While normally opcode should be swapped only if it was read
correctly from user memory.
Reviewed-by: Victor Kamensky <victor.kamensky@linaro.org>
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/kernel/traps.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 6eda3bf85c52..4636d56af2db 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -431,9 +431,10 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) instr2 = __mem_to_opcode_thumb16(instr2); instr = __opcode_thumb32_compose(instr, instr2); } - } else if (get_user(instr, (u32 __user *)pc)) { + } else { + if (get_user(instr, (u32 __user *)pc)) + goto die_sig; instr = __mem_to_opcode_arm(instr); - goto die_sig; } if (call_undef_hook(regs, instr) == 0) |