* [ammarfaizi2-block:brauner/linux/fs.xattr.simple.rework.rbtree 1/1] fs/xattr.c:1118 simple_xattr_get() error: uninitialized symbol 'ret'.
@ 2022-11-14 12:50 Dan Carpenter
2022-11-14 13:37 ` Christian Brauner
0 siblings, 1 reply; 2+ messages in thread
From: Dan Carpenter @ 2022-11-14 12:50 UTC (permalink / raw)
To: oe-kbuild, Christian Brauner
Cc: lkp, oe-kbuild-all, Ammar Faizi, GNU/Weeb Mailing List
tree: https://github.com/ammarfaizi2/linux-block brauner/linux/fs.xattr.simple.rework.rbtree
head: b1999797db0738e60ae9730fcdd5ec6dd7604cd0
commit: b1999797db0738e60ae9730fcdd5ec6dd7604cd0 [1/1] xattr: use rbtree for simple_xattrs
config: m68k-randconfig-m041-20221110
compiler: m68k-linux-gcc (GCC) 12.1.0
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <[email protected]>
| Reported-by: Dan Carpenter <[email protected]>
smatch warnings:
fs/xattr.c:1118 simple_xattr_get() error: uninitialized symbol 'ret'.
vim +/ret +1118 fs/xattr.c
38f38657444d15 Aristeu Rozanski 2012-08-23 1086 int simple_xattr_get(struct simple_xattrs *xattrs, const char *name,
38f38657444d15 Aristeu Rozanski 2012-08-23 1087 void *buffer, size_t size)
38f38657444d15 Aristeu Rozanski 2012-08-23 1088 {
b1999797db0738 Christian Brauner 2022-11-04 1089 struct simple_xattr *xattr = NULL;
b1999797db0738 Christian Brauner 2022-11-04 1090 struct rb_node *rbp;
b1999797db0738 Christian Brauner 2022-11-04 1091 int ret, seq = 0;
b1999797db0738 Christian Brauner 2022-11-04 1092
b1999797db0738 Christian Brauner 2022-11-04 1093 rcu_read_lock();
b1999797db0738 Christian Brauner 2022-11-04 1094 do {
b1999797db0738 Christian Brauner 2022-11-04 1095 read_seqbegin_or_lock(&xattrs->lock, &seq);
b1999797db0738 Christian Brauner 2022-11-04 1096 rbp = rcu_dereference(xattrs->rb_root.rb_node);
b1999797db0738 Christian Brauner 2022-11-04 1097 while (rbp) {
b1999797db0738 Christian Brauner 2022-11-04 1098 xattr = rb_entry(rbp, struct simple_xattr, rb_node);
b1999797db0738 Christian Brauner 2022-11-04 1099 if (strcmp(xattr->name, name) < 0) {
b1999797db0738 Christian Brauner 2022-11-04 1100 rbp = rcu_dereference(rbp->rb_left);
b1999797db0738 Christian Brauner 2022-11-04 1101 } else if (strcmp(xattr->name, name) > 0) {
b1999797db0738 Christian Brauner 2022-11-04 1102 rbp = rcu_dereference(rbp->rb_right);
b1999797db0738 Christian Brauner 2022-11-04 1103 } else {
38f38657444d15 Aristeu Rozanski 2012-08-23 1104 ret = xattr->size;
38f38657444d15 Aristeu Rozanski 2012-08-23 1105 if (buffer) {
38f38657444d15 Aristeu Rozanski 2012-08-23 1106 if (size < xattr->size)
38f38657444d15 Aristeu Rozanski 2012-08-23 1107 ret = -ERANGE;
38f38657444d15 Aristeu Rozanski 2012-08-23 1108 else
38f38657444d15 Aristeu Rozanski 2012-08-23 1109 memcpy(buffer, xattr->value, xattr->size);
38f38657444d15 Aristeu Rozanski 2012-08-23 1110 }
38f38657444d15 Aristeu Rozanski 2012-08-23 1111 break;
"ret" is only initialized if we find "xattr->name == name".
38f38657444d15 Aristeu Rozanski 2012-08-23 1112 }
b1999797db0738 Christian Brauner 2022-11-04 1113 }
b1999797db0738 Christian Brauner 2022-11-04 1114 } while (need_seqretry(&xattrs->lock, seq));
b1999797db0738 Christian Brauner 2022-11-04 1115 done_seqretry(&xattrs->lock, seq);
b1999797db0738 Christian Brauner 2022-11-04 1116 rcu_read_unlock();
b1999797db0738 Christian Brauner 2022-11-04 1117
38f38657444d15 Aristeu Rozanski 2012-08-23 @1118 return ret;
38f38657444d15 Aristeu Rozanski 2012-08-23 1119 }
--
0-DAY CI Kernel Test Service
https://01.org/lkp
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [ammarfaizi2-block:brauner/linux/fs.xattr.simple.rework.rbtree 1/1] fs/xattr.c:1118 simple_xattr_get() error: uninitialized symbol 'ret'.
2022-11-14 12:50 [ammarfaizi2-block:brauner/linux/fs.xattr.simple.rework.rbtree 1/1] fs/xattr.c:1118 simple_xattr_get() error: uninitialized symbol 'ret' Dan Carpenter
@ 2022-11-14 13:37 ` Christian Brauner
0 siblings, 0 replies; 2+ messages in thread
From: Christian Brauner @ 2022-11-14 13:37 UTC (permalink / raw)
To: Dan Carpenter
Cc: oe-kbuild, lkp, oe-kbuild-all, Ammar Faizi, GNU/Weeb Mailing List
On Mon, Nov 14, 2022 at 03:50:41PM +0300, Dan Carpenter wrote:
> tree: https://github.com/ammarfaizi2/linux-block brauner/linux/fs.xattr.simple.rework.rbtree
> head: b1999797db0738e60ae9730fcdd5ec6dd7604cd0
> commit: b1999797db0738e60ae9730fcdd5ec6dd7604cd0 [1/1] xattr: use rbtree for simple_xattrs
> config: m68k-randconfig-m041-20221110
> compiler: m68k-linux-gcc (GCC) 12.1.0
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <[email protected]>
> | Reported-by: Dan Carpenter <[email protected]>
>
> smatch warnings:
> fs/xattr.c:1118 simple_xattr_get() error: uninitialized symbol 'ret'.
>
> vim +/ret +1118 fs/xattr.c
>
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1086 int simple_xattr_get(struct simple_xattrs *xattrs, const char *name,
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1087 void *buffer, size_t size)
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1088 {
> b1999797db0738 Christian Brauner 2022-11-04 1089 struct simple_xattr *xattr = NULL;
> b1999797db0738 Christian Brauner 2022-11-04 1090 struct rb_node *rbp;
> b1999797db0738 Christian Brauner 2022-11-04 1091 int ret, seq = 0;
> b1999797db0738 Christian Brauner 2022-11-04 1092
> b1999797db0738 Christian Brauner 2022-11-04 1093 rcu_read_lock();
> b1999797db0738 Christian Brauner 2022-11-04 1094 do {
> b1999797db0738 Christian Brauner 2022-11-04 1095 read_seqbegin_or_lock(&xattrs->lock, &seq);
> b1999797db0738 Christian Brauner 2022-11-04 1096 rbp = rcu_dereference(xattrs->rb_root.rb_node);
> b1999797db0738 Christian Brauner 2022-11-04 1097 while (rbp) {
> b1999797db0738 Christian Brauner 2022-11-04 1098 xattr = rb_entry(rbp, struct simple_xattr, rb_node);
> b1999797db0738 Christian Brauner 2022-11-04 1099 if (strcmp(xattr->name, name) < 0) {
> b1999797db0738 Christian Brauner 2022-11-04 1100 rbp = rcu_dereference(rbp->rb_left);
> b1999797db0738 Christian Brauner 2022-11-04 1101 } else if (strcmp(xattr->name, name) > 0) {
> b1999797db0738 Christian Brauner 2022-11-04 1102 rbp = rcu_dereference(rbp->rb_right);
> b1999797db0738 Christian Brauner 2022-11-04 1103 } else {
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1104 ret = xattr->size;
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1105 if (buffer) {
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1106 if (size < xattr->size)
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1107 ret = -ERANGE;
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1108 else
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1109 memcpy(buffer, xattr->value, xattr->size);
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1110 }
> 38f38657444d15 Aristeu Rozanski 2012-08-23 1111 break;
>
> "ret" is only initialized if we find "xattr->name == name".
Hey Dan,
Thanks for the report but fwiw, this version of the patchset hasn't made
it. We went with what's in -next currently. So that bug should be gone!
Thank you!
Christian
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2022-11-14 12:50 [ammarfaizi2-block:brauner/linux/fs.xattr.simple.rework.rbtree 1/1] fs/xattr.c:1118 simple_xattr_get() error: uninitialized symbol 'ret' Dan Carpenter
2022-11-14 13:37 ` Christian Brauner
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