From: "Philippe Mathieu-Daudé" <philmd@redhat.com>
To: Markus Armbruster <armbru@redhat.com>, qemu-devel@nongnu.org
Cc: Igor Mammedov <imammedo@redhat.com>
Subject: Re: [PATCH v2 05/18] exec: Fix file_ram_alloc() error API violations
Date: Wed, 4 Dec 2019 15:53:10 +0100 [thread overview]
Message-ID: <d9002a45-efe2-bd83-aebb-78d53a0f9a70@redhat.com> (raw)
In-Reply-To: <20191204093625.14836-6-armbru@redhat.com>
On 12/4/19 10:36 AM, Markus Armbruster wrote:
> When os_mem_prealloc() fails, file_ram_alloc() calls qemu_ram_munmap()
> and returns null. Except it doesn't when its @errp argument is null,
> because it checks for failure with (errp && *errp). Introduced in
> commit 056b68af77 "fix qemu exit on memory hotplug when allocation
> fails at prealloc time".
>
> No caller actually passes null.
>
> Fix anyway: splice in a local Error *err, and error_propagate().
>
> Cc: Igor Mammedov <imammedo@redhat.com>
> Signed-off-by: Markus Armbruster <armbru@redhat.com>
> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
> exec.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/exec.c b/exec.c
> index ffdb518535..45695a5f2d 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -1841,6 +1841,7 @@ static void *file_ram_alloc(RAMBlock *block,
> bool truncate,
> Error **errp)
> {
> + Error *err = NULL;
> MachineState *ms = MACHINE(qdev_get_machine());
> void *area;
>
> @@ -1898,8 +1899,9 @@ static void *file_ram_alloc(RAMBlock *block,
> }
>
> if (mem_prealloc) {
> - os_mem_prealloc(fd, area, memory, ms->smp.cpus, errp);
> - if (errp && *errp) {
> + os_mem_prealloc(fd, area, memory, ms->smp.cpus, &err);
> + if (err) {
> + error_propagate(errp, err);
> qemu_ram_munmap(fd, area, memory);
> return NULL;
> }
>
next prev parent reply other threads:[~2019-12-04 14:53 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-04 9:36 [PATCH v2 00/18] Error handling fixes Markus Armbruster
2019-12-04 9:36 ` [PATCH v2 01/18] crypto: Fix certificate file error handling crash bug Markus Armbruster
2019-12-04 9:45 ` Daniel P. Berrangé
2019-12-04 9:36 ` [PATCH v2 02/18] crypto: Fix typo in QCryptoTLSSession's <example> comment Markus Armbruster
2019-12-04 9:45 ` Daniel P. Berrangé
2019-12-04 9:36 ` [PATCH v2 03/18] io: Fix Error usage in a comment <example> Markus Armbruster
2019-12-04 9:45 ` Daniel P. Berrangé
2019-12-04 9:36 ` [PATCH v2 04/18] tests: Clean up initialization of Error *err variables Markus Armbruster
2019-12-04 14:27 ` Eric Blake
2019-12-04 14:53 ` Philippe Mathieu-Daudé
2019-12-04 9:36 ` [PATCH v2 05/18] exec: Fix file_ram_alloc() error API violations Markus Armbruster
2019-12-04 14:53 ` Philippe Mathieu-Daudé [this message]
2019-12-04 9:36 ` [PATCH v2 06/18] hw/acpi: Fix legacy CPU plug " Markus Armbruster
2019-12-09 16:01 ` Michael S. Tsirkin
2019-12-04 9:36 ` [PATCH v2 07/18] hw/core: Fix fit_load_fdt() error handling violations Markus Armbruster
2019-12-04 14:55 ` Philippe Mathieu-Daudé
2019-12-04 9:36 ` [PATCH v2 08/18] hw/ipmi: Fix realize() error API violations Markus Armbruster
2019-12-04 9:36 ` [PATCH v2 09/18] qga: Fix guest-get-fsinfo " Markus Armbruster
2019-12-04 14:57 ` Philippe Mathieu-Daudé
2019-12-04 9:36 ` [PATCH v2 10/18] memory-device: Fix memory pre-plug " Markus Armbruster
2019-12-04 9:36 ` [PATCH v2 11/18] s390x/event-facility: Fix realize() " Markus Armbruster
2019-12-04 9:36 ` [PATCH v2 12/18] s390x/cpumodel: Fix feature property " Markus Armbruster
2019-12-04 9:36 ` [PATCH v2 13/18] s390x/cpumodel: Fix realize() " Markus Armbruster
2019-12-04 9:36 ` [PATCH v2 14/18] s390x/cpumodel: Fix query-cpu-model-FOO " Markus Armbruster
2019-12-04 9:36 ` [PATCH v2 15/18] s390x/cpumodel: Fix query-cpu-definitions " Markus Armbruster
2019-12-04 9:36 ` [PATCH v2 16/18] error: Clean up unusual names of Error * variables Markus Armbruster
2019-12-04 9:36 ` [PATCH v2 17/18] hw/intc/s390: Simplify error handling in kvm_s390_flic_realize() Markus Armbruster
2019-12-04 9:36 ` [PATCH v2 18/18] tests-blockjob: Use error_free_or_abort() Markus Armbruster
2019-12-04 9:38 ` [PATCH v2 00/18] Error handling fixes David Hildenbrand
2019-12-04 9:49 ` Markus Armbruster
2019-12-05 16:07 ` Cornelia Huck
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