* [dhowells-fs:netfs-next 46/50] fs/9p/vfs_addr.c:79:6: warning: variable 'len' is used uninitialized whenever 'if' condition is true
@ 2026-05-02 16:43 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-05-02 16:43 UTC (permalink / raw)
To: David Howells; +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-next
head: 2c55c7cf98847d593219ef29d3fedfd551d6f55f
commit: e192187e9d3cdb786b7b6aeb6fc6d4048a806004 [46/50] netfs: Combine prepare and issue ops and grab the buffers on request
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260502/202605021801.7vqkz933-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260502/202605021801.7vqkz933-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605021801.7vqkz933-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> fs/9p/vfs_addr.c:79:6: warning: variable 'len' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
79 | if (err < 0)
| ^~~~~~~
fs/9p/vfs_addr.c:90:51: note: uninitialized use occurs here
90 | return netfs_write_subrequest_terminated(subreq, len ?: err);
| ^~~
fs/9p/vfs_addr.c:79:2: note: remove the 'if' if its condition is always false
79 | if (err < 0)
| ^~~~~~~~~~~~
80 | goto term;
| ~~~~~~~~~
fs/9p/vfs_addr.c:74:14: note: initialize the variable 'len' to silence this warning
74 | int err, len;
| ^
| = 0
1 warning generated.
--
>> fs/netfs/write_collect.c:155:7: warning: variable 'fpos' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
155 | if (!bvecq->bv[slot].bv_page) {
| ^~~~~~~~~~~~~~~~~~~~~~~~
fs/netfs/write_collect.c:187:7: note: uninitialized use occurs here
187 | if (fpos + fsize >= collected_to)
| ^~~~
fs/netfs/write_collect.c:155:3: note: remove the 'if' if its condition is always false
155 | if (!bvecq->bv[slot].bv_page) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
156 | WARN_ONCE(1, "R=%08x slot already cleared?\n", wreq->debug_id);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
157 | fsize = bvecq->bv[slot].bv_len;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
158 | goto skip;
| ~~~~~~~~~~
159 | }
| ~
fs/netfs/write_collect.c:137:26: note: initialize the variable 'fpos' to silence this warning
137 | unsigned long long fpos, fend;
| ^
| = 0
1 warning generated.
vim +79 fs/9p/vfs_addr.c
66
67 /*
68 * Issue a subrequest to write to the server.
69 */
70 static void v9fs_issue_write(struct netfs_io_subrequest *subreq)
71 {
72 struct iov_iter iter;
73 struct p9_fid *fid = subreq->rreq->netfs_priv;
74 int err, len;
75
76 subreq->len = umin(subreq->len, fid->clnt->msize - P9_IOHDRSZ);
77
78 err = netfs_prepare_write_buffer(subreq, INT_MAX);
> 79 if (err < 0)
80 goto term;
81
82 iov_iter_bvec_queue(&iter, ITER_SOURCE, subreq->content.bvecq,
83 subreq->content.slot, subreq->content.offset, subreq->len);
84
85 len = p9_client_write(fid, subreq->start, &iter, &err);
86 if (len > 0)
87 __set_bit(NETFS_SREQ_MADE_PROGRESS, &subreq->flags);
88
89 term:
90 return netfs_write_subrequest_terminated(subreq, len ?: err);
91 }
92
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread
* [dhowells-fs:netfs-next 46/50] fs/9p/vfs_addr.c:79:6: warning: variable 'len' is used uninitialized whenever 'if' condition is true
@ 2026-05-03 13:36 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-05-03 13:36 UTC (permalink / raw)
To: David Howells; +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-next
head: 2c55c7cf98847d593219ef29d3fedfd551d6f55f
commit: e192187e9d3cdb786b7b6aeb6fc6d4048a806004 [46/50] netfs: Combine prepare and issue ops and grab the buffers on request
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20260503/202605032150.Zu7t6u9z-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260503/202605032150.Zu7t6u9z-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605032150.Zu7t6u9z-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> fs/9p/vfs_addr.c:79:6: warning: variable 'len' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
79 | if (err < 0)
| ^~~~~~~
fs/9p/vfs_addr.c:90:51: note: uninitialized use occurs here
90 | return netfs_write_subrequest_terminated(subreq, len ?: err);
| ^~~
fs/9p/vfs_addr.c:79:2: note: remove the 'if' if its condition is always false
79 | if (err < 0)
| ^~~~~~~~~~~~
80 | goto term;
| ~~~~~~~~~
fs/9p/vfs_addr.c:74:14: note: initialize the variable 'len' to silence this warning
74 | int err, len;
| ^
| = 0
1 warning generated.
--
>> fs/netfs/write_collect.c:155:7: warning: variable 'fpos' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
155 | if (!bvecq->bv[slot].bv_page) {
| ^~~~~~~~~~~~~~~~~~~~~~~~
fs/netfs/write_collect.c:187:7: note: uninitialized use occurs here
187 | if (fpos + fsize >= collected_to)
| ^~~~
fs/netfs/write_collect.c:155:3: note: remove the 'if' if its condition is always false
155 | if (!bvecq->bv[slot].bv_page) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
156 | WARN_ONCE(1, "R=%08x slot already cleared?\n", wreq->debug_id);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
157 | fsize = bvecq->bv[slot].bv_len;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
158 | goto skip;
| ~~~~~~~~~~
159 | }
| ~
fs/netfs/write_collect.c:137:26: note: initialize the variable 'fpos' to silence this warning
137 | unsigned long long fpos, fend;
| ^
| = 0
1 warning generated.
--
>> fs/netfs/read_pgpriv2.c:204:9: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
204 | return ret;
| ^~~
fs/netfs/read_pgpriv2.c:187:9: note: initialize the variable 'ret' to silence this warning
187 | int ret;
| ^
| = 0
1 warning generated.
vim +79 fs/9p/vfs_addr.c
66
67 /*
68 * Issue a subrequest to write to the server.
69 */
70 static void v9fs_issue_write(struct netfs_io_subrequest *subreq)
71 {
72 struct iov_iter iter;
73 struct p9_fid *fid = subreq->rreq->netfs_priv;
74 int err, len;
75
76 subreq->len = umin(subreq->len, fid->clnt->msize - P9_IOHDRSZ);
77
78 err = netfs_prepare_write_buffer(subreq, INT_MAX);
> 79 if (err < 0)
80 goto term;
81
82 iov_iter_bvec_queue(&iter, ITER_SOURCE, subreq->content.bvecq,
83 subreq->content.slot, subreq->content.offset, subreq->len);
84
85 len = p9_client_write(fid, subreq->start, &iter, &err);
86 if (len > 0)
87 __set_bit(NETFS_SREQ_MADE_PROGRESS, &subreq->flags);
88
89 term:
90 return netfs_write_subrequest_terminated(subreq, len ?: err);
91 }
92
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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