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| author | Mark Rutland <mark.rutland@arm.com> | 2017-10-30 21:23:19 +0000 |
|---|---|---|
| committer | Mark Salyzyn <salyzyn@google.com> | 2017-11-29 20:54:38 +0000 |
| commit | 67a8ab4adc2d30e3f3442a0659b887b4da83f7c2 (patch) | |
| tree | 038c678f87483fae2d3f1bacc2a6c405c9cb5bd8 /drivers/nvdimm/namespace_devs.c | |
| parent | 353c16247d72937c90e7ef04cbd603502581019a (diff) | |
UPSTREAM: arm64: vdso: fix clock_getres for 4GiB-aligned res
(cherry pick from commit c80ed088a519da53f27b798a69748eaabc66aadf)
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>
Bug: 20045882
Bug: 63737556
Change-Id: Iab5449d8515f9d655e792e3d7ce43a8f016fa2a0
Diffstat (limited to 'drivers/nvdimm/namespace_devs.c')
0 files changed, 0 insertions, 0 deletions