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| author | Shiraz Saleem <shiraz.saleem@intel.com> | 2021-06-25 19:23:29 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-06-25 20:08:30 +0300 |
| commit | 1f700757224effe598690b34e95329aff4e3e362 (patch) | |
| tree | bc3acf2b86ecadeeaad7d104b75cca4895174bae /drivers/infiniband/hw/irdma/utils.c | |
| parent | 46308965ae6fdc7c25deb2e8c048510ae51bbe66 (diff) | |
| download | linux-1f700757224effe598690b34e95329aff4e3e362.tar.xz | |
RDMA/irdma: Fix potential overflow expression in irdma_prm_get_pbles
Coverity reports a signed 32-bit overflow on "1 << pprm->pble_shift" when
used expression to compute bits_needed that expects 64bit, unsigned.
Fix this by using the 1ULL in the left shift operator and convert mem_size
to u64.
Link: https://lore.kernel.org/r/20210625162329.1654-3-tatyana.e.nikolova@intel.com
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1505157 ("Integer handling issues")
Fixes: 915cc7ac0f8e ("RDMA/irdma: Add miscellaneous utility definitions")
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/irdma/utils.c')
| -rw-r--r-- | drivers/infiniband/hw/irdma/utils.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/irdma/utils.c b/drivers/infiniband/hw/irdma/utils.c index ea1df5918c11..5bbe44e54f9a 100644 --- a/drivers/infiniband/hw/irdma/utils.c +++ b/drivers/infiniband/hw/irdma/utils.c @@ -2314,7 +2314,7 @@ enum irdma_status_code irdma_prm_add_pble_mem(struct irdma_pble_prm *pprm, */ enum irdma_status_code irdma_prm_get_pbles(struct irdma_pble_prm *pprm, - struct irdma_pble_chunkinfo *chunkinfo, u32 mem_size, + struct irdma_pble_chunkinfo *chunkinfo, u64 mem_size, u64 **vaddr, u64 *fpm_addr) { u64 bits_needed; @@ -2326,7 +2326,7 @@ irdma_prm_get_pbles(struct irdma_pble_prm *pprm, *vaddr = NULL; *fpm_addr = 0; - bits_needed = (mem_size + (1 << pprm->pble_shift) - 1) >> pprm->pble_shift; + bits_needed = DIV_ROUND_UP_ULL(mem_size, BIT_ULL(pprm->pble_shift)); spin_lock_irqsave(&pprm->prm_lock, flags); while (chunk_entry != &pprm->clist) { |