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author | Mark Rutland <mark.rutland@arm.com> | 2017-10-30 21:23:19 +0000 |
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committer | Will Deacon <will.deacon@arm.com> | 2017-10-31 09:49:33 +0000 |
commit | c80ed088a519da53f27b798a69748eaabc66aadf (patch) | |
tree | c46b7d933904bf8dc37f1f2f05520ff54922c28c /arch/openrisc | |
parent | fd9dde6abcb9bfe6c6bee48834e157999f113971 (diff) | |
download | linux-c80ed088a519da53f27b798a69748eaabc66aadf.tar.gz linux-c80ed088a519da53f27b798a69748eaabc66aadf.tar.bz2 linux-c80ed088a519da53f27b798a69748eaabc66aadf.zip |
arm64: vdso: fix clock_getres for 4GiB-aligned res
The vdso tries to check for a NULL res pointer in __kernel_clock_getres,
but only checks the lower 32 bits as is uses CBZ on the W register the
res pointer is held in.
Thus, if the res pointer happened to be aligned to a 4GiB boundary, we'd
spuriously skip storing the timespec to it, while returning a zero error code
to the caller.
Prevent this by checking the whole pointer, using CBZ on the X register
the res pointer is held in.
Fixes: 9031fefde6f2ac1d ("arm64: VDSO support")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reported-by: Andrew Pinski <apinski@cavium.com>
Reported-by: Mark Salyzyn <salyzyn@android.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/openrisc')
0 files changed, 0 insertions, 0 deletions