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Message-ID: <202508012010.9IA7JflG-lkp@intel.com>
Date: Fri, 1 Aug 2025 20:56:00 +0800
From: kernel test robot <lkp@...el.com>
To: Suren Baghdasaryan <surenb@...gle.com>, akpm@...ux-foundation.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
Liam.Howlett@...cle.com, lorenzo.stoakes@...cle.com,
david@...hat.com, vbabka@...e.cz, peterx@...hat.com,
jannh@...gle.com, hannes@...xchg.org, mhocko@...nel.org,
paulmck@...nel.org, shuah@...nel.org, adobriyan@...il.com,
brauner@...nel.org, josef@...icpanda.com, yebin10@...wei.com,
linux@...ssschuh.net, willy@...radead.org, osalvador@...e.de,
andrii@...nel.org, ryan.roberts@....com,
christophe.leroy@...roup.eu, tjmercier@...gle.com,
kaleshsingh@...gle.com, aha310510@...il.com,
linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
surenb@...gle.com
Subject: Re: [PATCH 2/3] fs/proc/task_mmu: factor out proc_maps_private
fields used by PROCMAP_QUERY
Hi Suren,
kernel test robot noticed the following build errors:
[auto build test ERROR on 01da54f10fddf3b01c5a3b80f6b16bbad390c302]
url: https://github.com/intel-lab-lkp/linux/commits/Suren-Baghdasaryan/selftests-proc-test-PROCMAP_QUERY-ioctl-while-vma-is-concurrently-modified/20250801-060200
base: 01da54f10fddf3b01c5a3b80f6b16bbad390c302
patch link: https://lore.kernel.org/r/20250731220024.702621-3-surenb%40google.com
patch subject: [PATCH 2/3] fs/proc/task_mmu: factor out proc_maps_private fields used by PROCMAP_QUERY
config: riscv-randconfig-002-20250801 (https://download.01.org/0day-ci/archive/20250801/202508012010.9IA7JflG-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/20250801/202508012010.9IA7JflG-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508012010.9IA7JflG-lkp@intel.com/
All errors (new ones prefixed by >>):
>> fs/proc/task_nommu.c:207:13: error: no member named 'mm' in 'struct proc_maps_private'
207 | mm = priv->mm;
| ~~~~ ^
fs/proc/task_nommu.c:229:31: error: no member named 'mm' in 'struct proc_maps_private'
229 | struct mm_struct *mm = priv->mm;
| ~~~~ ^
fs/proc/task_nommu.c:262:8: error: no member named 'mm' in 'struct proc_maps_private'
262 | priv->mm = proc_mem_open(inode, PTRACE_MODE_READ);
| ~~~~ ^
fs/proc/task_nommu.c:263:27: error: no member named 'mm' in 'struct proc_maps_private'
263 | if (IS_ERR_OR_NULL(priv->mm)) {
| ~~~~ ^
fs/proc/task_nommu.c:264:19: error: no member named 'mm' in 'struct proc_maps_private'
264 | int err = priv->mm ? PTR_ERR(priv->mm) : -ESRCH;
| ~~~~ ^
fs/proc/task_nommu.c:264:38: error: no member named 'mm' in 'struct proc_maps_private'
264 | int err = priv->mm ? PTR_ERR(priv->mm) : -ESRCH;
| ~~~~ ^
fs/proc/task_nommu.c:279:12: error: no member named 'mm' in 'struct proc_maps_private'
279 | if (priv->mm)
| ~~~~ ^
fs/proc/task_nommu.c:280:16: error: no member named 'mm' in 'struct proc_maps_private'
280 | mmdrop(priv->mm);
| ~~~~ ^
8 errors generated.
vim +207 fs/proc/task_nommu.c
fe441980161751 Ben Wolsieffer 2023-09-15 191
fe441980161751 Ben Wolsieffer 2023-09-15 192 static void *m_start(struct seq_file *m, loff_t *ppos)
^1da177e4c3f41 Linus Torvalds 2005-04-16 193 {
dbf8685c8e2140 David Howells 2006-09-27 194 struct proc_maps_private *priv = m->private;
fe441980161751 Ben Wolsieffer 2023-09-15 195 unsigned long last_addr = *ppos;
dbf8685c8e2140 David Howells 2006-09-27 196 struct mm_struct *mm;
0c563f14804356 Matthew Wilcox (Oracle 2022-09-06 197)
fe441980161751 Ben Wolsieffer 2023-09-15 198 /* See proc_get_vma(). Zero at the start or after lseek. */
fe441980161751 Ben Wolsieffer 2023-09-15 199 if (last_addr == -1UL)
0c563f14804356 Matthew Wilcox (Oracle 2022-09-06 200) return NULL;
dbf8685c8e2140 David Howells 2006-09-27 201
dbf8685c8e2140 David Howells 2006-09-27 202 /* pin the task and mm whilst we play with them */
2c03376d2db005 Oleg Nesterov 2014-10-09 203 priv->task = get_proc_task(priv->inode);
dbf8685c8e2140 David Howells 2006-09-27 204 if (!priv->task)
ec6fd8a4355cda Al Viro 2011-02-15 205 return ERR_PTR(-ESRCH);
dbf8685c8e2140 David Howells 2006-09-27 206
27692cd56e2aa6 Oleg Nesterov 2014-10-09 @207 mm = priv->mm;
578d7699e5c2ad Ben Wolsieffer 2023-09-14 208 if (!mm || !mmget_not_zero(mm)) {
578d7699e5c2ad Ben Wolsieffer 2023-09-14 209 put_task_struct(priv->task);
578d7699e5c2ad Ben Wolsieffer 2023-09-14 210 priv->task = NULL;
27692cd56e2aa6 Oleg Nesterov 2014-10-09 211 return NULL;
578d7699e5c2ad Ben Wolsieffer 2023-09-14 212 }
dbf8685c8e2140 David Howells 2006-09-27 213
d8ed45c5dcd455 Michel Lespinasse 2020-06-08 214 if (mmap_read_lock_killable(mm)) {
8a713e7df3352b Konstantin Khlebnikov 2019-07-11 215 mmput(mm);
578d7699e5c2ad Ben Wolsieffer 2023-09-14 216 put_task_struct(priv->task);
578d7699e5c2ad Ben Wolsieffer 2023-09-14 217 priv->task = NULL;
8a713e7df3352b Konstantin Khlebnikov 2019-07-11 218 return ERR_PTR(-EINTR);
8a713e7df3352b Konstantin Khlebnikov 2019-07-11 219 }
8a713e7df3352b Konstantin Khlebnikov 2019-07-11 220
fe441980161751 Ben Wolsieffer 2023-09-15 221 vma_iter_init(&priv->iter, mm, last_addr);
47fecca15c0944 Oleg Nesterov 2014-10-09 222
fe441980161751 Ben Wolsieffer 2023-09-15 223 return proc_get_vma(priv, ppos);
dbf8685c8e2140 David Howells 2006-09-27 224 }
dbf8685c8e2140 David Howells 2006-09-27 225
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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