mm/madvise.c:1385:5: warning: stack frame size (2064) exceeds limit (2048) in 'do_madvise'
From: kernel test robot
Date: Wed Jul 12 2023 - 05:10:56 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 3f01e9fed8454dcd89727016c3e5b2fbb8f8e50c
commit: 648321fa0d970c04b4327ac1a053abf43d285931 riscv: mm: try VMA lock-based page fault handling first
date: 3 weeks ago
config: riscv-randconfig-r023-20230712 (https://download.01.org/0day-ci/archive/20230712/202307121757.6jFBwr12-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce: (https://download.01.org/0day-ci/archive/20230712/202307121757.6jFBwr12-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307121757.6jFBwr12-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
>> mm/madvise.c:1385:5: warning: stack frame size (2064) exceeds limit (2048) in 'do_madvise' [-Wframe-larger-than]
int do_madvise(struct mm_struct *mm, unsigned long start, size_t len_in, int behavior)
^
1 warning generated.
vim +/do_madvise +1385 mm/madvise.c
9a10064f5625d5 Colin Cross 2022-01-14 1288
9a10064f5625d5 Colin Cross 2022-01-14 1289 int madvise_set_anon_name(struct mm_struct *mm, unsigned long start,
5c26f6ac9416b6 Suren Baghdasaryan 2022-03-04 1290 unsigned long len_in, struct anon_vma_name *anon_name)
9a10064f5625d5 Colin Cross 2022-01-14 1291 {
9a10064f5625d5 Colin Cross 2022-01-14 1292 unsigned long end;
9a10064f5625d5 Colin Cross 2022-01-14 1293 unsigned long len;
9a10064f5625d5 Colin Cross 2022-01-14 1294
9a10064f5625d5 Colin Cross 2022-01-14 1295 if (start & ~PAGE_MASK)
9a10064f5625d5 Colin Cross 2022-01-14 1296 return -EINVAL;
9a10064f5625d5 Colin Cross 2022-01-14 1297 len = (len_in + ~PAGE_MASK) & PAGE_MASK;
9a10064f5625d5 Colin Cross 2022-01-14 1298
9a10064f5625d5 Colin Cross 2022-01-14 1299 /* Check to see whether len was rounded up from small -ve to zero */
9a10064f5625d5 Colin Cross 2022-01-14 1300 if (len_in && !len)
9a10064f5625d5 Colin Cross 2022-01-14 1301 return -EINVAL;
9a10064f5625d5 Colin Cross 2022-01-14 1302
9a10064f5625d5 Colin Cross 2022-01-14 1303 end = start + len;
9a10064f5625d5 Colin Cross 2022-01-14 1304 if (end < start)
9a10064f5625d5 Colin Cross 2022-01-14 1305 return -EINVAL;
9a10064f5625d5 Colin Cross 2022-01-14 1306
9a10064f5625d5 Colin Cross 2022-01-14 1307 if (end == start)
9a10064f5625d5 Colin Cross 2022-01-14 1308 return 0;
9a10064f5625d5 Colin Cross 2022-01-14 1309
5c26f6ac9416b6 Suren Baghdasaryan 2022-03-04 1310 return madvise_walk_vmas(mm, start, end, (unsigned long)anon_name,
9a10064f5625d5 Colin Cross 2022-01-14 1311 madvise_vma_anon_name);
9a10064f5625d5 Colin Cross 2022-01-14 1312 }
9a10064f5625d5 Colin Cross 2022-01-14 1313 #endif /* CONFIG_ANON_VMA_NAME */
^1da177e4c3f41 Linus Torvalds 2005-04-16 1314 /*
^1da177e4c3f41 Linus Torvalds 2005-04-16 1315 * The madvise(2) system call.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1316 *
^1da177e4c3f41 Linus Torvalds 2005-04-16 1317 * Applications can use madvise() to advise the kernel how it should
^1da177e4c3f41 Linus Torvalds 2005-04-16 1318 * handle paging I/O in this VM area. The idea is to help the kernel
^1da177e4c3f41 Linus Torvalds 2005-04-16 1319 * use appropriate read-ahead and caching techniques. The information
^1da177e4c3f41 Linus Torvalds 2005-04-16 1320 * provided is advisory only, and can be safely disregarded by the
^1da177e4c3f41 Linus Torvalds 2005-04-16 1321 * kernel without affecting the correct operation of the application.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1322 *
^1da177e4c3f41 Linus Torvalds 2005-04-16 1323 * behavior values:
^1da177e4c3f41 Linus Torvalds 2005-04-16 1324 * MADV_NORMAL - the default behavior is to read clusters. This
^1da177e4c3f41 Linus Torvalds 2005-04-16 1325 * results in some read-ahead and read-behind.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1326 * MADV_RANDOM - the system should read the minimum amount of data
^1da177e4c3f41 Linus Torvalds 2005-04-16 1327 * on any access, since it is unlikely that the appli-
^1da177e4c3f41 Linus Torvalds 2005-04-16 1328 * cation will need more than what it asks for.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1329 * MADV_SEQUENTIAL - pages in the given range will probably be accessed
^1da177e4c3f41 Linus Torvalds 2005-04-16 1330 * once, so they can be aggressively read ahead, and
^1da177e4c3f41 Linus Torvalds 2005-04-16 1331 * can be freed soon after they are accessed.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1332 * MADV_WILLNEED - the application is notifying the system to read
^1da177e4c3f41 Linus Torvalds 2005-04-16 1333 * some pages ahead.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1334 * MADV_DONTNEED - the application is finished with the given range,
^1da177e4c3f41 Linus Torvalds 2005-04-16 1335 * so the kernel can free resources associated with it.
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1336 * MADV_FREE - the application marks pages in the given range as lazy free,
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1337 * where actual purges are postponed until memory pressure happens.
f6b3ec238d12c8 Badari Pulavarty 2006-01-06 1338 * MADV_REMOVE - the application wants to free up the given range of
f6b3ec238d12c8 Badari Pulavarty 2006-01-06 1339 * pages and associated backing store.
3866ea90d3635d Hugh Dickins 2009-09-21 1340 * MADV_DONTFORK - omit this area from child's address space when forking:
3866ea90d3635d Hugh Dickins 2009-09-21 1341 * typically, to avoid COWing pages pinned by get_user_pages().
3866ea90d3635d Hugh Dickins 2009-09-21 1342 * MADV_DOFORK - cancel MADV_DONTFORK: no longer omit this area when forking.
c02c3009325418 Yang Shi 2017-10-13 1343 * MADV_WIPEONFORK - present the child process with zero-filled memory in this
c02c3009325418 Yang Shi 2017-10-13 1344 * range after a fork.
c02c3009325418 Yang Shi 2017-10-13 1345 * MADV_KEEPONFORK - undo the effect of MADV_WIPEONFORK
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1346 * MADV_HWPOISON - trigger memory error handler as if the given memory range
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1347 * were corrupted by unrecoverable hardware memory failure.
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1348 * MADV_SOFT_OFFLINE - try to soft-offline the given range of memory.
f8af4da3b4c14e Hugh Dickins 2009-09-21 1349 * MADV_MERGEABLE - the application recommends that KSM try to merge pages in
f8af4da3b4c14e Hugh Dickins 2009-09-21 1350 * this area with pages of identical content from other such areas.
f8af4da3b4c14e Hugh Dickins 2009-09-21 1351 * MADV_UNMERGEABLE- cancel MADV_MERGEABLE: no longer merge pages with others.
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1352 * MADV_HUGEPAGE - the application wants to back the given range by transparent
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1353 * huge pages in the future. Existing pages might be coalesced and
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1354 * new pages might be allocated as THP.
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1355 * MADV_NOHUGEPAGE - mark the given range as not worth being backed by
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1356 * transparent huge pages so the existing pages will not be
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1357 * coalesced into THP and new pages will not be allocated as THP.
7d8faaf155454f Zach O'Keefe 2022-07-06 1358 * MADV_COLLAPSE - synchronously coalesce pages into new THP.
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1359 * MADV_DONTDUMP - the application wants to prevent pages in the given range
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1360 * from being included in its core dump.
d7206a70af5c09 Naoya Horiguchi 2016-03-15 1361 * MADV_DODUMP - cancel MADV_DONTDUMP: no longer exclude from core dump.
ecb8ac8b1f1469 Minchan Kim 2020-10-17 1362 * MADV_COLD - the application is not expected to use this memory soon,
ecb8ac8b1f1469 Minchan Kim 2020-10-17 1363 * deactivate pages in this range so that they can be reclaimed
f0953a1bbaca71 Ingo Molnar 2021-05-06 1364 * easily if memory pressure happens.
ecb8ac8b1f1469 Minchan Kim 2020-10-17 1365 * MADV_PAGEOUT - the application is not expected to use this memory soon,
ecb8ac8b1f1469 Minchan Kim 2020-10-17 1366 * page out the pages in this range immediately.
4ca9b3859dac14 David Hildenbrand 2021-06-30 1367 * MADV_POPULATE_READ - populate (prefault) page tables readable by
4ca9b3859dac14 David Hildenbrand 2021-06-30 1368 * triggering read faults if required
4ca9b3859dac14 David Hildenbrand 2021-06-30 1369 * MADV_POPULATE_WRITE - populate (prefault) page tables writable by
4ca9b3859dac14 David Hildenbrand 2021-06-30 1370 * triggering write faults if required
^1da177e4c3f41 Linus Torvalds 2005-04-16 1371 *
^1da177e4c3f41 Linus Torvalds 2005-04-16 1372 * return values:
^1da177e4c3f41 Linus Torvalds 2005-04-16 1373 * zero - success
^1da177e4c3f41 Linus Torvalds 2005-04-16 1374 * -EINVAL - start + len < 0, start is not page-aligned,
^1da177e4c3f41 Linus Torvalds 2005-04-16 1375 * "behavior" is not a valid value, or application
c02c3009325418 Yang Shi 2017-10-13 1376 * is attempting to release locked or shared pages,
c02c3009325418 Yang Shi 2017-10-13 1377 * or the specified address range includes file, Huge TLB,
c02c3009325418 Yang Shi 2017-10-13 1378 * MAP_SHARED or VMPFNMAP range.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1379 * -ENOMEM - addresses in the specified range are not currently
^1da177e4c3f41 Linus Torvalds 2005-04-16 1380 * mapped, or are outside the AS of the process.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1381 * -EIO - an I/O error occurred while paging in data.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1382 * -EBADF - map exists, but area maps something that isn't a file.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1383 * -EAGAIN - a kernel resource was temporarily unavailable.
^1da177e4c3f41 Linus Torvalds 2005-04-16 1384 */
0726b01e70455f Minchan Kim 2020-10-17 @1385 int do_madvise(struct mm_struct *mm, unsigned long start, size_t len_in, int behavior)
^1da177e4c3f41 Linus Torvalds 2005-04-16 1386 {
ac1e9acc5acf0b Colin Cross 2022-01-14 1387 unsigned long end;
ac1e9acc5acf0b Colin Cross 2022-01-14 1388 int error;
f7977793240d83 Jason Baron 2007-07-15 1389 int write;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1390 size_t len;
1998cc04890110 Shaohua Li 2013-02-22 1391 struct blk_plug plug;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1392
75927af8bcb940 Nicholas Piggin 2009-06-16 1393 if (!madvise_behavior_valid(behavior))
ac1e9acc5acf0b Colin Cross 2022-01-14 1394 return -EINVAL;
75927af8bcb940 Nicholas Piggin 2009-06-16 1395
df6c6500b4416b Wei Yang 2019-11-30 1396 if (!PAGE_ALIGNED(start))
ac1e9acc5acf0b Colin Cross 2022-01-14 1397 return -EINVAL;
df6c6500b4416b Wei Yang 2019-11-30 1398 len = PAGE_ALIGN(len_in);
^1da177e4c3f41 Linus Torvalds 2005-04-16 1399
^1da177e4c3f41 Linus Torvalds 2005-04-16 1400 /* Check to see whether len was rounded up from small -ve to zero */
^1da177e4c3f41 Linus Torvalds 2005-04-16 1401 if (len_in && !len)
ac1e9acc5acf0b Colin Cross 2022-01-14 1402 return -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1403
^1da177e4c3f41 Linus Torvalds 2005-04-16 1404 end = start + len;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1405 if (end < start)
ac1e9acc5acf0b Colin Cross 2022-01-14 1406 return -EINVAL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 1407
^1da177e4c3f41 Linus Torvalds 2005-04-16 1408 if (end == start)
ac1e9acc5acf0b Colin Cross 2022-01-14 1409 return 0;
84d96d897671cf Rasmus Villemoes 2013-04-29 1410
:::::: The code at line 1385 was first introduced by commit
:::::: 0726b01e70455f9900ab524117c7b520d197dc8c mm/madvise: pass mm to do_madvise
:::::: TO: Minchan Kim <minchan@xxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
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