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| author | Ekansh Gupta <quic_ekangupt@quicinc.com> | 2023-10-13 13:20:04 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-16 20:58:49 +0200 |
| commit | 1c29d80134ac116e0196c7bad58a2121381b679c (patch) | |
| tree | 2c6c917ec7872f3aa1ee92857bbbbb277286a2e4 /drivers/misc | |
| parent | 58720809f52779dc0f08e53e54b014209d13eebb (diff) | |
| download | linux-1c29d80134ac116e0196c7bad58a2121381b679c.tar.gz | |
misc: fastrpc: Reset metadata buffer to avoid incorrect free
Metadata buffer is allocated during get_args for any remote call.
This buffer carries buffers, fdlists and other payload information
for the call. If the buffer is not reset, put_args might find some
garbage FDs in the fdlist which might have an existing mapping in
the list. This could result in improper freeing of FD map when DSP
might still be using the buffer. Added change to reset the metadata
buffer after allocation.
Fixes: 8f6c1d8c4f0c ("misc: fastrpc: Add fdlist implementation")
Cc: stable <stable@kernel.org>
Signed-off-by: Ekansh Gupta <quic_ekangupt@quicinc.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20231013122007.174464-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/fastrpc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index a66b7c111cd519..fb921975b56d5c 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -958,6 +958,7 @@ static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) if (err) return err; + memset(ctx->buf->virt, 0, pkt_size); rpra = ctx->buf->virt; list = fastrpc_invoke_buf_start(rpra, ctx->nscalars); pages = fastrpc_phy_page_start(list, ctx->nscalars); |