* [PATCH] um: remove uses of variable length arrays
@ 2019-03-12 13:30 Bartosz Golaszewski
2019-03-13 9:45 ` Anton Ivanov
0 siblings, 1 reply; 6+ messages in thread
From: Bartosz Golaszewski @ 2019-03-12 13:30 UTC (permalink / raw)
To: Jeff Dike, Richard Weinberger, Anton Ivanov
Cc: linux-um, linux-kernel, Bartosz Golaszewski
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
While the affected code is run in user-mode, the build still warns
about it. Convert all uses of VLA to dynamic allocations.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
arch/um/os-Linux/umid.c | 36 +++++++++++++++++++++++++++---------
1 file changed, 27 insertions(+), 9 deletions(-)
diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
index 998fbb445458..e261656fe9d7 100644
--- a/arch/um/os-Linux/umid.c
+++ b/arch/um/os-Linux/umid.c
@@ -135,12 +135,18 @@ static int remove_files_and_dir(char *dir)
*/
static inline int is_umdir_used(char *dir)
{
- char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
- char pid[sizeof("nnnnn\0")], *end;
+ char pid[sizeof("nnnnn\0")], *end, *file;
int dead, fd, p, n, err;
+ size_t filelen;
- n = snprintf(file, sizeof(file), "%s/pid", dir);
- if (n >= sizeof(file)) {
+ err = asprintf(&file, "%s/pid", dir);
+ if (err < 0)
+ return 0;
+
+ filelen = strlen(file);
+
+ n = snprintf(file, filelen, "%s/pid", dir);
+ if (n >= filelen) {
printk(UM_KERN_ERR "is_umdir_used - pid filename too long\n");
err = -E2BIG;
goto out;
@@ -185,6 +191,7 @@ static inline int is_umdir_used(char *dir)
out_close:
close(fd);
out:
+ free(file);
return 0;
}
@@ -210,18 +217,21 @@ static int umdir_take_if_dead(char *dir)
static void __init create_pid_file(void)
{
- char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
- char pid[sizeof("nnnnn\0")];
+ char pid[sizeof("nnnnn\0")], *file;
int fd, n;
- if (umid_file_name("pid", file, sizeof(file)))
+ file = malloc(strlen(uml_dir) + UMID_LEN + sizeof("/pid\0"));
+ if (!file)
return;
+ if (umid_file_name("pid", file, sizeof(file)))
+ goto out;
+
fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0644);
if (fd < 0) {
printk(UM_KERN_ERR "Open of machine pid file \"%s\" failed: "
"%s\n", file, strerror(errno));
- return;
+ goto out;
}
snprintf(pid, sizeof(pid), "%d\n", getpid());
@@ -231,6 +241,8 @@ static void __init create_pid_file(void)
errno);
close(fd);
+out:
+ free(file);
}
int __init set_umid(char *name)
@@ -385,13 +397,19 @@ __uml_setup("uml_dir=", set_uml_dir,
static void remove_umid_dir(void)
{
- char dir[strlen(uml_dir) + UMID_LEN + 1], err;
+ char *dir, err;
+
+ dir = malloc(strlen(uml_dir) + UMID_LEN + 1);
+ if (!dir)
+ return;
sprintf(dir, "%s%s", uml_dir, umid);
err = remove_files_and_dir(dir);
if (err)
os_warn("%s - remove_files_and_dir failed with err = %d\n",
__func__, err);
+
+ free(dir);
}
__uml_exitcall(remove_umid_dir);
--
2.20.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] um: remove uses of variable length arrays
2019-03-12 13:30 [PATCH] um: remove uses of variable length arrays Bartosz Golaszewski
@ 2019-03-13 9:45 ` Anton Ivanov
2019-03-13 9:48 ` Bartosz Golaszewski
2019-03-14 13:33 ` Bartosz Golaszewski
0 siblings, 2 replies; 6+ messages in thread
From: Anton Ivanov @ 2019-03-13 9:45 UTC (permalink / raw)
To: Bartosz Golaszewski, Jeff Dike, Richard Weinberger
Cc: Bartosz Golaszewski, linux-um, linux-kernel
On 12/03/2019 13:30, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> While the affected code is run in user-mode, the build still warns
> about it. Convert all uses of VLA to dynamic allocations.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> ---
> arch/um/os-Linux/umid.c | 36 +++++++++++++++++++++++++++---------
> 1 file changed, 27 insertions(+), 9 deletions(-)
>
> diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
> index 998fbb445458..e261656fe9d7 100644
> --- a/arch/um/os-Linux/umid.c
> +++ b/arch/um/os-Linux/umid.c
> @@ -135,12 +135,18 @@ static int remove_files_and_dir(char *dir)
> */
> static inline int is_umdir_used(char *dir)
> {
> - char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
> - char pid[sizeof("nnnnn\0")], *end;
> + char pid[sizeof("nnnnn\0")], *end, *file;
> int dead, fd, p, n, err;
> + size_t filelen;
>
> - n = snprintf(file, sizeof(file), "%s/pid", dir);
> - if (n >= sizeof(file)) {
> + err = asprintf(&file, "%s/pid", dir);
> + if (err < 0)
> + return 0;
> +
> + filelen = strlen(file);
> +
> + n = snprintf(file, filelen, "%s/pid", dir);
> + if (n >= filelen) {
> printk(UM_KERN_ERR "is_umdir_used - pid filename too long\n");
> err = -E2BIG;
> goto out;
> @@ -185,6 +191,7 @@ static inline int is_umdir_used(char *dir)
> out_close:
> close(fd);
> out:
> + free(file);
> return 0;
> }
>
> @@ -210,18 +217,21 @@ static int umdir_take_if_dead(char *dir)
>
> static void __init create_pid_file(void)
> {
> - char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
> - char pid[sizeof("nnnnn\0")];
> + char pid[sizeof("nnnnn\0")], *file;
> int fd, n;
>
> - if (umid_file_name("pid", file, sizeof(file)))
> + file = malloc(strlen(uml_dir) + UMID_LEN + sizeof("/pid\0"));
> + if (!file)
> return;
>
> + if (umid_file_name("pid", file, sizeof(file)))
> + goto out;
> +
> fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0644);
> if (fd < 0) {
> printk(UM_KERN_ERR "Open of machine pid file \"%s\" failed: "
> "%s\n", file, strerror(errno));
> - return;
> + goto out;
> }
>
> snprintf(pid, sizeof(pid), "%d\n", getpid());
> @@ -231,6 +241,8 @@ static void __init create_pid_file(void)
> errno);
>
> close(fd);
> +out:
> + free(file);
> }
>
> int __init set_umid(char *name)
> @@ -385,13 +397,19 @@ __uml_setup("uml_dir=", set_uml_dir,
>
> static void remove_umid_dir(void)
> {
> - char dir[strlen(uml_dir) + UMID_LEN + 1], err;
> + char *dir, err;
> +
> + dir = malloc(strlen(uml_dir) + UMID_LEN + 1);
> + if (!dir)
> + return;
>
> sprintf(dir, "%s%s", uml_dir, umid);
> err = remove_files_and_dir(dir);
> if (err)
> os_warn("%s - remove_files_and_dir failed with err = %d\n",
> __func__, err);
> +
> + free(dir);
> }
>
> __uml_exitcall(remove_umid_dir);
>
Thanks for bringing it up. It helped me notice that this is actually broken.
PID can be more than 5 digits nowdays.
--
Anton R. Ivanov
Cambridgegreys Limited. Registered in England. Company Number 10273661
https://www.cambridgegreys.com/
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] um: remove uses of variable length arrays
2019-03-13 9:45 ` Anton Ivanov
@ 2019-03-13 9:48 ` Bartosz Golaszewski
2019-03-13 10:11 ` Geert Uytterhoeven
2019-03-14 13:33 ` Bartosz Golaszewski
1 sibling, 1 reply; 6+ messages in thread
From: Bartosz Golaszewski @ 2019-03-13 9:48 UTC (permalink / raw)
To: Anton Ivanov
Cc: Jeff Dike, Richard Weinberger, Bartosz Golaszewski, linux-um,
Linux Kernel Mailing List
śr., 13 mar 2019 o 10:45 Anton Ivanov
<anton.ivanov@cambridgegreys.com> napisał(a):
>
> On 12/03/2019 13:30, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> >
> > While the affected code is run in user-mode, the build still warns
> > about it. Convert all uses of VLA to dynamic allocations.
> >
> > Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> > ---
> > arch/um/os-Linux/umid.c | 36 +++++++++++++++++++++++++++---------
> > 1 file changed, 27 insertions(+), 9 deletions(-)
> >
> > diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
> > index 998fbb445458..e261656fe9d7 100644
> > --- a/arch/um/os-Linux/umid.c
> > +++ b/arch/um/os-Linux/umid.c
> > @@ -135,12 +135,18 @@ static int remove_files_and_dir(char *dir)
> > */
> > static inline int is_umdir_used(char *dir)
> > {
> > - char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
> > - char pid[sizeof("nnnnn\0")], *end;
> > + char pid[sizeof("nnnnn\0")], *end, *file;
> > int dead, fd, p, n, err;
> > + size_t filelen;
> >
> > - n = snprintf(file, sizeof(file), "%s/pid", dir);
> > - if (n >= sizeof(file)) {
> > + err = asprintf(&file, "%s/pid", dir);
> > + if (err < 0)
> > + return 0;
> > +
> > + filelen = strlen(file);
> > +
> > + n = snprintf(file, filelen, "%s/pid", dir);
> > + if (n >= filelen) {
> > printk(UM_KERN_ERR "is_umdir_used - pid filename too long\n");
> > err = -E2BIG;
> > goto out;
> > @@ -185,6 +191,7 @@ static inline int is_umdir_used(char *dir)
> > out_close:
> > close(fd);
> > out:
> > + free(file);
> > return 0;
> > }
> >
> > @@ -210,18 +217,21 @@ static int umdir_take_if_dead(char *dir)
> >
> > static void __init create_pid_file(void)
> > {
> > - char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
> > - char pid[sizeof("nnnnn\0")];
> > + char pid[sizeof("nnnnn\0")], *file;
> > int fd, n;
> >
> > - if (umid_file_name("pid", file, sizeof(file)))
> > + file = malloc(strlen(uml_dir) + UMID_LEN + sizeof("/pid\0"));
> > + if (!file)
> > return;
> >
> > + if (umid_file_name("pid", file, sizeof(file)))
> > + goto out;
> > +
> > fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0644);
> > if (fd < 0) {
> > printk(UM_KERN_ERR "Open of machine pid file \"%s\" failed: "
> > "%s\n", file, strerror(errno));
> > - return;
> > + goto out;
> > }
> >
> > snprintf(pid, sizeof(pid), "%d\n", getpid());
> > @@ -231,6 +241,8 @@ static void __init create_pid_file(void)
> > errno);
> >
> > close(fd);
> > +out:
> > + free(file);
> > }
> >
> > int __init set_umid(char *name)
> > @@ -385,13 +397,19 @@ __uml_setup("uml_dir=", set_uml_dir,
> >
> > static void remove_umid_dir(void)
> > {
> > - char dir[strlen(uml_dir) + UMID_LEN + 1], err;
> > + char *dir, err;
> > +
> > + dir = malloc(strlen(uml_dir) + UMID_LEN + 1);
> > + if (!dir)
> > + return;
> >
> > sprintf(dir, "%s%s", uml_dir, umid);
> > err = remove_files_and_dir(dir);
> > if (err)
> > os_warn("%s - remove_files_and_dir failed with err = %d\n",
> > __func__, err);
> > +
> > + free(dir);
> > }
> >
> > __uml_exitcall(remove_umid_dir);
> >
>
> Thanks for bringing it up. It helped me notice that this is actually broken.
>
> PID can be more than 5 digits nowdays.
>
Do we have a macro in the kernel that yields the minimum size of an
array to fit a number? I can't find it. I vagely remember seeing
something like this in systemd tree. If it doesn't exist in the kernel
then maybe we should copy it over.
Bart
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] um: remove uses of variable length arrays
2019-03-13 9:48 ` Bartosz Golaszewski
@ 2019-03-13 10:11 ` Geert Uytterhoeven
0 siblings, 0 replies; 6+ messages in thread
From: Geert Uytterhoeven @ 2019-03-13 10:11 UTC (permalink / raw)
To: Bartosz Golaszewski
Cc: Anton Ivanov, Jeff Dike, Richard Weinberger, Bartosz Golaszewski,
linux-um, Linux Kernel Mailing List
Hi Bartosz,
On Wed, Mar 13, 2019 at 10:50 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> śr., 13 mar 2019 o 10:45 Anton Ivanov
> <anton.ivanov@cambridgegreys.com> napisał(a):
> > PID can be more than 5 digits nowdays.
>
> Do we have a macro in the kernel that yields the minimum size of an
> array to fit a number? I can't find it. I vagely remember seeing
> something like this in systemd tree. If it doesn't exist in the kernel
> then maybe we should copy it over.
1 + const_ilog2(n) / log2(10) = 1 + const_ilog2(n) / 3.321928
Using fixed point calculations, that can be approximated as
1 + 19728 * const_ilog2(n) >> 16
1 + 77 * const_ilog2(n) >> 8
(the factors might be one off)
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] um: remove uses of variable length arrays
2019-03-13 9:45 ` Anton Ivanov
2019-03-13 9:48 ` Bartosz Golaszewski
@ 2019-03-14 13:33 ` Bartosz Golaszewski
2019-03-14 13:45 ` Anton Ivanov
1 sibling, 1 reply; 6+ messages in thread
From: Bartosz Golaszewski @ 2019-03-14 13:33 UTC (permalink / raw)
To: Anton Ivanov
Cc: Jeff Dike, Richard Weinberger, Bartosz Golaszewski, linux-um,
Linux Kernel Mailing List
śr., 13 mar 2019 o 10:45 Anton Ivanov
<anton.ivanov@cambridgegreys.com> napisał(a):
>
> On 12/03/2019 13:30, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> >
> > While the affected code is run in user-mode, the build still warns
> > about it. Convert all uses of VLA to dynamic allocations.
> >
> > Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> > ---
> > arch/um/os-Linux/umid.c | 36 +++++++++++++++++++++++++++---------
> > 1 file changed, 27 insertions(+), 9 deletions(-)
> >
> > diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
> > index 998fbb445458..e261656fe9d7 100644
> > --- a/arch/um/os-Linux/umid.c
> > +++ b/arch/um/os-Linux/umid.c
> > @@ -135,12 +135,18 @@ static int remove_files_and_dir(char *dir)
> > */
> > static inline int is_umdir_used(char *dir)
> > {
> > - char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
> > - char pid[sizeof("nnnnn\0")], *end;
> > + char pid[sizeof("nnnnn\0")], *end, *file;
> > int dead, fd, p, n, err;
> > + size_t filelen;
> >
> > - n = snprintf(file, sizeof(file), "%s/pid", dir);
> > - if (n >= sizeof(file)) {
> > + err = asprintf(&file, "%s/pid", dir);
> > + if (err < 0)
> > + return 0;
> > +
> > + filelen = strlen(file);
> > +
> > + n = snprintf(file, filelen, "%s/pid", dir);
> > + if (n >= filelen) {
> > printk(UM_KERN_ERR "is_umdir_used - pid filename too long\n");
> > err = -E2BIG;
> > goto out;
> > @@ -185,6 +191,7 @@ static inline int is_umdir_used(char *dir)
> > out_close:
> > close(fd);
> > out:
> > + free(file);
> > return 0;
> > }
> >
> > @@ -210,18 +217,21 @@ static int umdir_take_if_dead(char *dir)
> >
> > static void __init create_pid_file(void)
> > {
> > - char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
> > - char pid[sizeof("nnnnn\0")];
> > + char pid[sizeof("nnnnn\0")], *file;
> > int fd, n;
> >
> > - if (umid_file_name("pid", file, sizeof(file)))
> > + file = malloc(strlen(uml_dir) + UMID_LEN + sizeof("/pid\0"));
> > + if (!file)
> > return;
> >
> > + if (umid_file_name("pid", file, sizeof(file)))
> > + goto out;
> > +
> > fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0644);
> > if (fd < 0) {
> > printk(UM_KERN_ERR "Open of machine pid file \"%s\" failed: "
> > "%s\n", file, strerror(errno));
> > - return;
> > + goto out;
> > }
> >
> > snprintf(pid, sizeof(pid), "%d\n", getpid());
> > @@ -231,6 +241,8 @@ static void __init create_pid_file(void)
> > errno);
> >
> > close(fd);
> > +out:
> > + free(file);
> > }
> >
> > int __init set_umid(char *name)
> > @@ -385,13 +397,19 @@ __uml_setup("uml_dir=", set_uml_dir,
> >
> > static void remove_umid_dir(void)
> > {
> > - char dir[strlen(uml_dir) + UMID_LEN + 1], err;
> > + char *dir, err;
> > +
> > + dir = malloc(strlen(uml_dir) + UMID_LEN + 1);
> > + if (!dir)
> > + return;
> >
> > sprintf(dir, "%s%s", uml_dir, umid);
> > err = remove_files_and_dir(dir);
> > if (err)
> > os_warn("%s - remove_files_and_dir failed with err = %d\n",
> > __func__, err);
> > +
> > + free(dir);
> > }
> >
> > __uml_exitcall(remove_umid_dir);
> >
>
> Thanks for bringing it up. It helped me notice that this is actually broken.
>
> PID can be more than 5 digits nowdays.
>
> --
Do you want to take this patch anyway and then apply the fix for the
array on top of that or do you prefer it be fixed before that?
Bart
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] um: remove uses of variable length arrays
2019-03-14 13:33 ` Bartosz Golaszewski
@ 2019-03-14 13:45 ` Anton Ivanov
0 siblings, 0 replies; 6+ messages in thread
From: Anton Ivanov @ 2019-03-14 13:45 UTC (permalink / raw)
To: Bartosz Golaszewski
Cc: Jeff Dike, Richard Weinberger, Bartosz Golaszewski, linux-um,
Linux Kernel Mailing List
On 14/03/2019 13:33, Bartosz Golaszewski wrote:
> śr., 13 mar 2019 o 10:45 Anton Ivanov
> <anton.ivanov@cambridgegreys.com> napisał(a):
>> On 12/03/2019 13:30, Bartosz Golaszewski wrote:
>>> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>>>
>>> While the affected code is run in user-mode, the build still warns
>>> about it. Convert all uses of VLA to dynamic allocations.
>>>
>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>>> ---
>>> arch/um/os-Linux/umid.c | 36 +++++++++++++++++++++++++++---------
>>> 1 file changed, 27 insertions(+), 9 deletions(-)
>>>
>>> diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c
>>> index 998fbb445458..e261656fe9d7 100644
>>> --- a/arch/um/os-Linux/umid.c
>>> +++ b/arch/um/os-Linux/umid.c
>>> @@ -135,12 +135,18 @@ static int remove_files_and_dir(char *dir)
>>> */
>>> static inline int is_umdir_used(char *dir)
>>> {
>>> - char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
>>> - char pid[sizeof("nnnnn\0")], *end;
>>> + char pid[sizeof("nnnnn\0")], *end, *file;
>>> int dead, fd, p, n, err;
>>> + size_t filelen;
>>>
>>> - n = snprintf(file, sizeof(file), "%s/pid", dir);
>>> - if (n >= sizeof(file)) {
>>> + err = asprintf(&file, "%s/pid", dir);
>>> + if (err < 0)
>>> + return 0;
>>> +
>>> + filelen = strlen(file);
>>> +
>>> + n = snprintf(file, filelen, "%s/pid", dir);
>>> + if (n >= filelen) {
>>> printk(UM_KERN_ERR "is_umdir_used - pid filename too long\n");
>>> err = -E2BIG;
>>> goto out;
>>> @@ -185,6 +191,7 @@ static inline int is_umdir_used(char *dir)
>>> out_close:
>>> close(fd);
>>> out:
>>> + free(file);
>>> return 0;
>>> }
>>>
>>> @@ -210,18 +217,21 @@ static int umdir_take_if_dead(char *dir)
>>>
>>> static void __init create_pid_file(void)
>>> {
>>> - char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
>>> - char pid[sizeof("nnnnn\0")];
>>> + char pid[sizeof("nnnnn\0")], *file;
>>> int fd, n;
>>>
>>> - if (umid_file_name("pid", file, sizeof(file)))
>>> + file = malloc(strlen(uml_dir) + UMID_LEN + sizeof("/pid\0"));
>>> + if (!file)
>>> return;
>>>
>>> + if (umid_file_name("pid", file, sizeof(file)))
>>> + goto out;
>>> +
>>> fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0644);
>>> if (fd < 0) {
>>> printk(UM_KERN_ERR "Open of machine pid file \"%s\" failed: "
>>> "%s\n", file, strerror(errno));
>>> - return;
>>> + goto out;
>>> }
>>>
>>> snprintf(pid, sizeof(pid), "%d\n", getpid());
>>> @@ -231,6 +241,8 @@ static void __init create_pid_file(void)
>>> errno);
>>>
>>> close(fd);
>>> +out:
>>> + free(file);
>>> }
>>>
>>> int __init set_umid(char *name)
>>> @@ -385,13 +397,19 @@ __uml_setup("uml_dir=", set_uml_dir,
>>>
>>> static void remove_umid_dir(void)
>>> {
>>> - char dir[strlen(uml_dir) + UMID_LEN + 1], err;
>>> + char *dir, err;
>>> +
>>> + dir = malloc(strlen(uml_dir) + UMID_LEN + 1);
>>> + if (!dir)
>>> + return;
>>>
>>> sprintf(dir, "%s%s", uml_dir, umid);
>>> err = remove_files_and_dir(dir);
>>> if (err)
>>> os_warn("%s - remove_files_and_dir failed with err = %d\n",
>>> __func__, err);
>>> +
>>> + free(dir);
>>> }
>>>
>>> __uml_exitcall(remove_umid_dir);
>>>
>> Thanks for bringing it up. It helped me notice that this is actually broken.
>>
>> PID can be more than 5 digits nowdays.
>>
>> --
> Do you want to take this patch anyway and then apply the fix for the
> array on top of that or do you prefer it be fixed before that?
>
> Bart
>
I am OK to take it as is and have the PID length fixed after that.
--
Anton R. Ivanov
Cambridgegreys Limited. Registered in England. Company Number 10273661
https://www.cambridgegreys.com/
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-03-14 13:45 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-03-12 13:30 [PATCH] um: remove uses of variable length arrays Bartosz Golaszewski
2019-03-13 9:45 ` Anton Ivanov
2019-03-13 9:48 ` Bartosz Golaszewski
2019-03-13 10:11 ` Geert Uytterhoeven
2019-03-14 13:33 ` Bartosz Golaszewski
2019-03-14 13:45 ` Anton Ivanov
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