* [PATCH] nand command: fix null pointer when adding/deleting a bb device
@ 2018-08-15 7:07 Oleg.Karfich
2018-08-17 6:18 ` Sascha Hauer
0 siblings, 1 reply; 2+ messages in thread
From: Oleg.Karfich @ 2018-08-15 7:07 UTC (permalink / raw)
To: barebox; +Cc: Oleg.Karfich
Commit 40ee300 introduces info option about bad blocks. The open()
function call is therefore moved out from mark good/bad block to use the
filedescriptor in info option too. If someone tries to add/delete a bb device
the optind variable is incremented and the open() call gets a null pointer.
Fix this issue by returning when the bb device is added/deleted.
Signed-off-by: Oleg Karfich <oleg.karfich@wago.com>
---
commands/nand.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/commands/nand.c b/commands/nand.c
index b065a66..c57b394 100644
--- a/commands/nand.c
+++ b/commands/nand.c
@@ -41,7 +41,7 @@ static int do_nand(int argc, char *argv[])
int command = 0;
loff_t badblock = 0;
int fd;
- int ret;
+ int ret = 0;
struct mtd_info_user mtdinfo;
while((opt = getopt(argc, argv, "adb:g:i")) > 0) {
@@ -88,13 +88,18 @@ static int do_nand(int argc, char *argv[])
optind++;
}
+
+ goto out_ret;
}
if (command == NAND_DEL) {
while (optind < argc) {
- dev_remove_bb_dev(basename(argv[optind]));
+ if (dev_remove_bb_dev(basename(argv[optind])))
+ return 1;
optind++;
}
+
+ goto out_ret;
}
fd = open(argv[optind], O_RDWR);
@@ -149,10 +154,10 @@ static int do_nand(int argc, char *argv[])
printf("No bad blocks\n");
}
- ret = 0;
out:
close(fd);
+out_ret:
return ret;
}
--
2.7.4
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] nand command: fix null pointer when adding/deleting a bb device
2018-08-15 7:07 [PATCH] nand command: fix null pointer when adding/deleting a bb device Oleg.Karfich
@ 2018-08-17 6:18 ` Sascha Hauer
0 siblings, 0 replies; 2+ messages in thread
From: Sascha Hauer @ 2018-08-17 6:18 UTC (permalink / raw)
To: Oleg.Karfich; +Cc: barebox
On Wed, Aug 15, 2018 at 07:07:40AM +0000, Oleg.Karfich@wago.com wrote:
> Commit 40ee300 introduces info option about bad blocks. The open()
> function call is therefore moved out from mark good/bad block to use the
> filedescriptor in info option too. If someone tries to add/delete a bb device
> the optind variable is incremented and the open() call gets a null pointer.
> Fix this issue by returning when the bb device is added/deleted.
>
> Signed-off-by: Oleg Karfich <oleg.karfich@wago.com>
> ---
> commands/nand.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
Applied, thanks
Sascha
>
> diff --git a/commands/nand.c b/commands/nand.c
> index b065a66..c57b394 100644
> --- a/commands/nand.c
> +++ b/commands/nand.c
> @@ -41,7 +41,7 @@ static int do_nand(int argc, char *argv[])
> int command = 0;
> loff_t badblock = 0;
> int fd;
> - int ret;
> + int ret = 0;
> struct mtd_info_user mtdinfo;
>
> while((opt = getopt(argc, argv, "adb:g:i")) > 0) {
> @@ -88,13 +88,18 @@ static int do_nand(int argc, char *argv[])
>
> optind++;
> }
> +
> + goto out_ret;
> }
>
> if (command == NAND_DEL) {
> while (optind < argc) {
> - dev_remove_bb_dev(basename(argv[optind]));
> + if (dev_remove_bb_dev(basename(argv[optind])))
> + return 1;
> optind++;
> }
> +
> + goto out_ret;
> }
>
> fd = open(argv[optind], O_RDWR);
> @@ -149,10 +154,10 @@ static int do_nand(int argc, char *argv[])
> printf("No bad blocks\n");
> }
>
> - ret = 0;
> out:
> close(fd);
>
> +out_ret:
> return ret;
> }
>
> --
> 2.7.4
>
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
>
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