* [PATCH V2 2/2] scripts: dtc: fix memory leak after realloc [not found] <1460494500-26922-1-git-send-email-mussitantesmortem@gmail.com> @ 2016-04-12 20:55 ` Maxim Zhukov [not found] ` <1460494500-26922-3-git-send-email-mussitantesmortem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 0 siblings, 1 reply; 4+ messages in thread From: Maxim Zhukov @ 2016-04-12 20:55 UTC (permalink / raw) To: linux-kernel Cc: Michal Marek, Rob Herring, Frank Rowand, Grant Likely, Maxim Zhukov, devicetree-compiler This commit fixed memory leak after errors realloc. Signed-off-by: Maxim Zhukov <mussitantesmortem@gmail.com> --- scripts/dtc/fdtput.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/scripts/dtc/fdtput.c b/scripts/dtc/fdtput.c index f2197f5..1042319 100644 --- a/scripts/dtc/fdtput.c +++ b/scripts/dtc/fdtput.c @@ -75,8 +75,9 @@ static int encode_value(struct display_info *disp, char **arg, int arg_count, char *ptr; /* pointer to current value position */ int len; /* length of this cell/string/byte */ int ival; - int upto; /* the number of bytes we have written to buf */ + int upto; /* the number of bytes we have written to buf */ char fmt[3]; + void *save_ptr = NULL; /* save pointer to realloc */ upto = 0; @@ -96,12 +97,15 @@ static int encode_value(struct display_info *disp, char **arg, int arg_count, /* enlarge our value buffer by a suitable margin if needed */ if (upto + len > value_size) { value_size = (upto + len) + 500; - value = realloc(value, value_size); - if (!value) { + void *save_ptr = realloc(value, value_size); + + if (!save_ptr) { + free(value); fprintf(stderr, "Out of mmory: cannot alloc " "%d bytes\n", value_size); return -1; } + value = save_ptr; } ptr = value + upto; -- 2.7.1.1.g3617aa0 ^ permalink raw reply related [flat|nested] 4+ messages in thread
[parent not found: <1460494500-26922-3-git-send-email-mussitantesmortem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]
* Re: [PATCH V2 2/2] scripts: dtc: fix memory leak after realloc [not found] ` <1460494500-26922-3-git-send-email-mussitantesmortem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> @ 2016-04-12 21:11 ` Rob Herring [not found] ` <CAL_JsqKqbj+FmD2SwSsmdBW6SPoJzsP5an1o_XZAozo86ssPCg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-04-12 21:29 ` (unknown), Maxim Zhukov 1 sibling, 1 reply; 4+ messages in thread From: Rob Herring @ 2016-04-12 21:11 UTC (permalink / raw) To: Maxim Zhukov Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Michal Marek, Frank Rowand, Grant Likely, devicetree-compiler-u79uwXL29TY76Z2rM5mHXA On Tue, Apr 12, 2016 at 3:55 PM, Maxim Zhukov <mussitantesmortem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > This commit fixed memory leak after errors realloc. > > Signed-off-by: Maxim Zhukov <mussitantesmortem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> > --- > scripts/dtc/fdtput.c | 10 +++++++--- Again, your patch is against the kernel copy of dtc. It needs to be against upstream dtc and then I can update the kernel copy once this lands. Rob ^ permalink raw reply [flat|nested] 4+ messages in thread
[parent not found: <CAL_JsqKqbj+FmD2SwSsmdBW6SPoJzsP5an1o_XZAozo86ssPCg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>]
* Re: [PATCH V2 2/2] scripts: dtc: fix memory leak after realloc [not found] ` <CAL_JsqKqbj+FmD2SwSsmdBW6SPoJzsP5an1o_XZAozo86ssPCg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> @ 2016-04-13 4:17 ` David Gibson 0 siblings, 0 replies; 4+ messages in thread From: David Gibson @ 2016-04-13 4:17 UTC (permalink / raw) To: Rob Herring Cc: Maxim Zhukov, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Michal Marek, Frank Rowand, Grant Likely, devicetree-compiler-u79uwXL29TY76Z2rM5mHXA [-- Attachment #1: Type: text/plain, Size: 902 bytes --] On Tue, Apr 12, 2016 at 04:11:17PM -0500, Rob Herring wrote: > On Tue, Apr 12, 2016 at 3:55 PM, Maxim Zhukov > <mussitantesmortem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > This commit fixed memory leak after errors realloc. > > > > Signed-off-by: Maxim Zhukov <mussitantesmortem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> > > --- > > scripts/dtc/fdtput.c | 10 +++++++--- > > Again, your patch is against the kernel copy of dtc. It needs to be > against upstream dtc and then I can update the kernel copy once this > lands. Right. TBH, I'm not particularly concerned about the leak anyway. The memory will be freed when fdtput exits moments later, so it's really not a big deal. -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 819 bytes --] ^ permalink raw reply [flat|nested] 4+ messages in thread
* (unknown), [not found] ` <1460494500-26922-3-git-send-email-mussitantesmortem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-04-12 21:11 ` Rob Herring @ 2016-04-12 21:29 ` Maxim Zhukov 1 sibling, 0 replies; 4+ messages in thread From: Maxim Zhukov @ 2016-04-12 21:29 UTC (permalink / raw) To: devicetree-compiler-u79uwXL29TY76Z2rM5mHXA Cc: Maxim Zhukov, Rob Herring, Michal Marek, Frank Rowand, Grant Likely Subject: [PATCH RESEND 2/2] scripts: dtc: fix memory leak after realloc This commit fixed memory leak after errors realloc. Signed-off-by: Maxim Zhukov <mussitantesmortem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> --- scripts/dtc/fdtput.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/scripts/dtc/fdtput.c b/scripts/dtc/fdtput.c index f2197f5..1042319 100644 --- a/scripts/dtc/fdtput.c +++ b/scripts/dtc/fdtput.c @@ -75,8 +75,9 @@ static int encode_value(struct display_info *disp, char **arg, int arg_count, char *ptr; /* pointer to current value position */ int len; /* length of this cell/string/byte */ int ival; - int upto; /* the number of bytes we have written to buf */ + int upto; /* the number of bytes we have written to buf */ char fmt[3]; + void *save_ptr = NULL; /* save pointer to realloc */ upto = 0; @@ -96,12 +97,15 @@ static int encode_value(struct display_info *disp, char **arg, int arg_count, /* enlarge our value buffer by a suitable margin if needed */ if (upto + len > value_size) { value_size = (upto + len) + 500; - value = realloc(value, value_size); - if (!value) { + void *save_ptr = realloc(value, value_size); + + if (!save_ptr) { + free(value); fprintf(stderr, "Out of mmory: cannot alloc " "%d bytes\n", value_size); return -1; } + value = save_ptr; } ptr = value + upto; -- 2.7.1.1.g3617aa0 ^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2016-04-13 4:17 UTC | newest]
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[not found] <1460494500-26922-1-git-send-email-mussitantesmortem@gmail.com>
2016-04-12 20:55 ` [PATCH V2 2/2] scripts: dtc: fix memory leak after realloc Maxim Zhukov
[not found] ` <1460494500-26922-3-git-send-email-mussitantesmortem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-04-12 21:11 ` Rob Herring
[not found] ` <CAL_JsqKqbj+FmD2SwSsmdBW6SPoJzsP5an1o_XZAozo86ssPCg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-04-13 4:17 ` David Gibson
2016-04-12 21:29 ` (unknown), Maxim Zhukov
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