diff options
| author |   Jeya R <jeyr@codeaurora.org> | 2021-11-24 22:01:21 +0530 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-03 14:17:52 +0100 |
| commit | 3a1bf591e9a410f220b7405a142a47407394a1d5 (patch) | |
| tree | 73ed7b66faa037212b1a50a21d712dc38a47fe8a /drivers/misc/fastrpc.c | |
| parent | MAINTAINERS: add maintainer for Qualcomm FastRPC driver (diff) | |
| download | linux-dev-3a1bf591e9a410f220b7405a142a47407394a1d5.tar.xz linux-dev-3a1bf591e9a410f220b7405a142a47407394a1d5.zip | |
misc: fastrpc: fix improper packet size calculation
The buffer list is sorted and this is not being considered while
calculating packet size. This would lead to improper copy length
calculation for non-dmaheap buffers which would eventually cause
sending improper buffers to DSP.
Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method")
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Jeya R <jeyr@codeaurora.org>
Link: https://lore.kernel.org/r/1637771481-4299-1-git-send-email-jeyr@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/fastrpc.c')
| -rw-r--r-- | drivers/misc/fastrpc.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 39aca7753719..4ccbf43e6bfa 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -719,16 +719,18 @@ static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) { u64 size = 0; - int i; + int oix; size = ALIGN(metalen, FASTRPC_ALIGN); - for (i = 0; i < ctx->nscalars; i++) { + for (oix = 0; oix < ctx->nbufs; oix++) { + int i = ctx->olaps[oix].raix; + if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { - if (ctx->olaps[i].offset == 0) + if (ctx->olaps[oix].offset == 0) size = ALIGN(size, FASTRPC_ALIGN); - size += (ctx->olaps[i].mend - ctx->olaps[i].mstart); + size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart); } } |