* [PATCH v2] tools/libxc: Adjust error handling in map_p2m_list() to fix CentOS 7 build
@ 2016-01-08 14:38 Andrew Cooper
2016-01-08 14:43 ` Juergen Gross
0 siblings, 1 reply; 3+ messages in thread
From: Andrew Cooper @ 2016-01-08 14:38 UTC (permalink / raw)
To: Xen-devel
Cc: Juergen Gross, Andrew Cooper, Ian Jackson, Ian Campbell, Wei Liu
The "goto err;" for malloc() error handling would cause the cleanup code
to use 'ptes' before it had been initialised, and causing a build
failure because of -Werror=maybe-uninitialised.
Use "goto err;" consistently for all error handling.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Ian Campbell <Ian.Campbell@citrix.com>
CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
CC: Juergen Gross <jgross@suse.com>
---
tools/libxc/xc_sr_save_x86_pv.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/tools/libxc/xc_sr_save_x86_pv.c b/tools/libxc/xc_sr_save_x86_pv.c
index 4deb58f..4a29460 100644
--- a/tools/libxc/xc_sr_save_x86_pv.c
+++ b/tools/libxc/xc_sr_save_x86_pv.c
@@ -316,8 +316,8 @@ static int map_p2m_list(struct xc_sr_context *ctx, uint64_t p2m_cr3)
xc_interface *xch = ctx->xch;
xen_vaddr_t p2m_vaddr, p2m_end, mask, off;
xen_pfn_t p2m_mfn, mfn, saved_mfn, max_pfn;
- uint64_t *ptes;
- xen_pfn_t *mfns;
+ uint64_t *ptes = NULL;
+ xen_pfn_t *mfns = NULL;
unsigned fpp, n_pages, level, shift, idx_start, idx_end, idx, saved_idx;
int rc = -1;
@@ -327,7 +327,7 @@ static int map_p2m_list(struct xc_sr_context *ctx, uint64_t p2m_cr3)
{
ERROR("Bad p2m_cr3 value %#" PRIx64, p2m_cr3);
errno = ERANGE;
- return -1;
+ goto err;
}
get_p2m_generation(ctx);
@@ -350,7 +350,7 @@ static int map_p2m_list(struct xc_sr_context *ctx, uint64_t p2m_cr3)
ERROR("Bad virtual p2m address range %#" PRIx64 "-%#" PRIx64,
p2m_vaddr, p2m_end);
errno = ERANGE;
- return -1;
+ goto err;
}
}
else
@@ -363,7 +363,7 @@ static int map_p2m_list(struct xc_sr_context *ctx, uint64_t p2m_cr3)
ERROR("Bad virtual p2m address range %#" PRIx64 "-%#" PRIx64,
p2m_vaddr, p2m_end);
errno = ERANGE;
- return -1;
+ goto err;
}
}
--
2.1.4
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] tools/libxc: Adjust error handling in map_p2m_list() to fix CentOS 7 build
2016-01-08 14:38 [PATCH v2] tools/libxc: Adjust error handling in map_p2m_list() to fix CentOS 7 build Andrew Cooper
@ 2016-01-08 14:43 ` Juergen Gross
2016-01-08 15:32 ` Ian Campbell
0 siblings, 1 reply; 3+ messages in thread
From: Juergen Gross @ 2016-01-08 14:43 UTC (permalink / raw)
To: Andrew Cooper, Xen-devel; +Cc: Wei Liu, Ian Jackson, Ian Campbell
On 08/01/16 15:38, Andrew Cooper wrote:
> The "goto err;" for malloc() error handling would cause the cleanup code
> to use 'ptes' before it had been initialised, and causing a build
> failure because of -Werror=maybe-uninitialised.
>
> Use "goto err;" consistently for all error handling.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
> ---
> CC: Ian Campbell <Ian.Campbell@citrix.com>
> CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
> CC: Wei Liu <wei.liu2@citrix.com>
> CC: Juergen Gross <jgross@suse.com>
> ---
> tools/libxc/xc_sr_save_x86_pv.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/tools/libxc/xc_sr_save_x86_pv.c b/tools/libxc/xc_sr_save_x86_pv.c
> index 4deb58f..4a29460 100644
> --- a/tools/libxc/xc_sr_save_x86_pv.c
> +++ b/tools/libxc/xc_sr_save_x86_pv.c
> @@ -316,8 +316,8 @@ static int map_p2m_list(struct xc_sr_context *ctx, uint64_t p2m_cr3)
> xc_interface *xch = ctx->xch;
> xen_vaddr_t p2m_vaddr, p2m_end, mask, off;
> xen_pfn_t p2m_mfn, mfn, saved_mfn, max_pfn;
> - uint64_t *ptes;
> - xen_pfn_t *mfns;
> + uint64_t *ptes = NULL;
> + xen_pfn_t *mfns = NULL;
> unsigned fpp, n_pages, level, shift, idx_start, idx_end, idx, saved_idx;
> int rc = -1;
>
> @@ -327,7 +327,7 @@ static int map_p2m_list(struct xc_sr_context *ctx, uint64_t p2m_cr3)
> {
> ERROR("Bad p2m_cr3 value %#" PRIx64, p2m_cr3);
> errno = ERANGE;
> - return -1;
> + goto err;
> }
>
> get_p2m_generation(ctx);
> @@ -350,7 +350,7 @@ static int map_p2m_list(struct xc_sr_context *ctx, uint64_t p2m_cr3)
> ERROR("Bad virtual p2m address range %#" PRIx64 "-%#" PRIx64,
> p2m_vaddr, p2m_end);
> errno = ERANGE;
> - return -1;
> + goto err;
> }
> }
> else
> @@ -363,7 +363,7 @@ static int map_p2m_list(struct xc_sr_context *ctx, uint64_t p2m_cr3)
> ERROR("Bad virtual p2m address range %#" PRIx64 "-%#" PRIx64,
> p2m_vaddr, p2m_end);
> errno = ERANGE;
> - return -1;
> + goto err;
> }
> }
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] tools/libxc: Adjust error handling in map_p2m_list() to fix CentOS 7 build
2016-01-08 14:43 ` Juergen Gross
@ 2016-01-08 15:32 ` Ian Campbell
0 siblings, 0 replies; 3+ messages in thread
From: Ian Campbell @ 2016-01-08 15:32 UTC (permalink / raw)
To: Juergen Gross, Andrew Cooper, Xen-devel; +Cc: Ian Jackson, Wei Liu
On Fri, 2016-01-08 at 15:43 +0100, Juergen Gross wrote:
> On 08/01/16 15:38, Andrew Cooper wrote:
> > The "goto err;" for malloc() error handling would cause the cleanup
> > code
> > to use 'ptes' before it had been initialised, and causing a build
> > failure because of -Werror=maybe-uninitialised.
> >
> > Use "goto err;" consistently for all error handling.
> >
> > Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
>
> Reviewed-by: Juergen Gross <jgross@suse.com>
Acked, applied, thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2016-01-08 14:38 [PATCH v2] tools/libxc: Adjust error handling in map_p2m_list() to fix CentOS 7 build Andrew Cooper
2016-01-08 14:43 ` Juergen Gross
2016-01-08 15:32 ` Ian Campbell
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