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| author |   Vineet Gupta <vgupta@synopsys.com> | 2013-09-26 18:50:40 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-09-27 16:28:47 +0530 |
| commit | 0752adfda15f0eca9859a76da3db1800e129ad43 (patch) | |
| tree | 854479800b11fb24d21d35f17851912cf0df7b63 /arch/arc/include/asm/spinlock.h | |
| parent | ARC: Handle zero-overhead-loop in unaligned access handler (diff) | |
| download | linux-dev-0752adfda15f0eca9859a76da3db1800e129ad43.tar.xz linux-dev-0752adfda15f0eca9859a76da3db1800e129ad43.zip | |
ARC: Fix 32-bit wrap around in access_ok()
Anton reported
| LTP tests syscalls/process_vm_readv01 and process_vm_writev01 fail
| similarly in one testcase test_iov_invalid -> lvec->iov_base.
| Testcase expects errno EFAULT and return code -1,
| but it gets return code 1 and ERRNO is 0 what means success.
Essentially test case was passing a pointer of -1 which access_ok()
was not catching. It was doing [@addr + @sz <= TASK_SIZE] which would
pass for @addr == -1
Fixed that by rewriting as [@addr <= TASK_SIZE - @sz]
Reported-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions