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gpu: nvgpu: Validate regops num_ops argument

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Check that num_ops is not too big. We have a hard limit of 1 page
allocated for the operations.

Bug 200192125

Change-Id: I724039c9dd6e0e93d9df0f5b3a797158fdb5e687
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1132965
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Terje Bergstrom
2016-04-26 13:37:45 -07:00
parent 394545acf6
commit ad24c028db
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.c
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@@ -975,6 +975,9 @@ static int nvgpu_ioctl_channel_reg_ops(struct dbg_session_gk20a *dbg_s,
struct channel_gk20a *ch;
u64 ops_size = sizeof(ops[0]) * args->num_ops;
if (args->num_ops > SZ_4K / sizeof(ops[0]))
return -EINVAL;
gk20a_dbg_fn("%d ops, total size %llu", args->num_ops, ops_size);
if (!dbg_s->ops) {