[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH 7/8] migration: fix unbounded stack for source_r
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH 7/8] migration: fix unbounded stack for source_return_path_thread |
Date: |
Tue, 8 Mar 2016 13:26:24 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 |
On 08/03/2016 08:00, Peter Xu wrote:
> Suggested-by: Paolo Bonzini <address@hidden>
> CC: Juan Quintela <address@hidden>
> CC: Amit Shah <address@hidden>
> Signed-off-by: Peter Xu <address@hidden>
> ---
> migration/migration.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/migration/migration.c b/migration/migration.c
> index 0129d9f..f1a3976 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -1265,11 +1265,11 @@ static void
> migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname,
> */
> static void *source_return_path_thread(void *opaque)
> {
> +#define __MAX_LEN (512)
> MigrationState *ms = opaque;
> QEMUFile *rp = ms->rp_state.from_dst_file;
> uint16_t header_len, header_type;
> - const int max_len = 512;
> - uint8_t buf[max_len];
> + uint8_t buf[__MAX_LEN];
> uint32_t tmp32, sibling_error;
> ram_addr_t start = 0; /* =0 to silence warning */
> size_t len = 0, expected_len;
> @@ -1292,7 +1292,7 @@ static void *source_return_path_thread(void *opaque)
>
> if ((rp_cmd_args[header_type].len != -1 &&
> header_len != rp_cmd_args[header_type].len) ||
> - header_len > max_len) {
> + header_len > __MAX_LEN) {
> error_report("RP: Received '%s' message (0x%04x) with"
> "incorrect length %d expecting %zu",
> rp_cmd_args[header_type].name, header_type, header_len,
> @@ -1372,6 +1372,7 @@ out:
> ms->rp_state.from_dst_file = NULL;
> qemu_fclose(rp);
> return NULL;
> +#undef __MAX_LEN
> }
>
> static int open_return_path_on_source(MigrationState *ms)
>
Another compiler false positive that you can fix with ARRAY_SIZE.
Paolo
- Re: [Qemu-devel] [PATCH 5/8] usb: fix unbounded stack for inotify_watchfn, (continued)
Re: [Qemu-devel] [PATCH 5/8] usb: fix unbounded stack for inotify_watchfn, Paolo Bonzini, 2016/03/08
[Qemu-devel] [PATCH 6/8] usb: fix unbounded stack for usb_mtp_add_str, Peter Xu, 2016/03/08
[Qemu-devel] [PATCH 7/8] migration: fix unbounded stack for source_return_path_thread, Peter Xu, 2016/03/08
[Qemu-devel] [PATCH 8/8] hw/i386: fix unbounded stack for load_multiboot, Peter Xu, 2016/03/08