* [vfs:work.mount-syscalls 1/10] fs/namespace.c:2386:35: sparse: sparse: incorrect type in argument 2 (different address spaces)
@ 2019-05-03 11:35 kbuild test robot
0 siblings, 0 replies; only message in thread
From: kbuild test robot @ 2019-05-03 11:35 UTC (permalink / raw)
To: Al Viro; +Cc: kbuild-all, linux-fsdevel, David Howells
tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.mount-syscalls
head: f1b5618e013af28b3c78daf424436a79674423c0
commit: a07b20004793d8926f78d63eb5980559f7813404 [1/10] vfs: syscall: Add open_tree(2) to reference or clone a mount
reproduce:
# apt-get install sparse
git checkout a07b20004793d8926f78d63eb5980559f7813404
make ARCH=x86_64 allmodconfig
make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>
sparse warnings: (new ones prefixed by >>)
fs/namespace.c:1736:22: sparse: sparse: symbol 'to_mnt_ns' was not declared. Should it be static?
>> fs/namespace.c:2386:35: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected char const [noderef] <asn:1> *name @@ got f] <asn:1> *name @@
>> fs/namespace.c:2386:35: sparse: expected char const [noderef] <asn:1> *name
>> fs/namespace.c:2386:35: sparse: got char const *filename
vim +2386 fs/namespace.c
2352
2353 SYSCALL_DEFINE3(open_tree, int, dfd, const char *, filename, unsigned, flags)
2354 {
2355 struct file *file;
2356 struct path path;
2357 int lookup_flags = LOOKUP_AUTOMOUNT | LOOKUP_FOLLOW;
2358 bool detached = flags & OPEN_TREE_CLONE;
2359 int error;
2360 int fd;
2361
2362 BUILD_BUG_ON(OPEN_TREE_CLOEXEC != O_CLOEXEC);
2363
2364 if (flags & ~(AT_EMPTY_PATH | AT_NO_AUTOMOUNT | AT_RECURSIVE |
2365 AT_SYMLINK_NOFOLLOW | OPEN_TREE_CLONE |
2366 OPEN_TREE_CLOEXEC))
2367 return -EINVAL;
2368
2369 if ((flags & (AT_RECURSIVE | OPEN_TREE_CLONE)) == AT_RECURSIVE)
2370 return -EINVAL;
2371
2372 if (flags & AT_NO_AUTOMOUNT)
2373 lookup_flags &= ~LOOKUP_AUTOMOUNT;
2374 if (flags & AT_SYMLINK_NOFOLLOW)
2375 lookup_flags &= ~LOOKUP_FOLLOW;
2376 if (flags & AT_EMPTY_PATH)
2377 lookup_flags |= LOOKUP_EMPTY;
2378
2379 if (detached && !may_mount())
2380 return -EPERM;
2381
2382 fd = get_unused_fd_flags(flags & O_CLOEXEC);
2383 if (fd < 0)
2384 return fd;
2385
> 2386 error = user_path_at(dfd, filename, lookup_flags, &path);
2387 if (unlikely(error)) {
2388 file = ERR_PTR(error);
2389 } else {
2390 if (detached)
2391 file = open_detached_copy(&path, flags & AT_RECURSIVE);
2392 else
2393 file = dentry_open(&path, O_PATH, current_cred());
2394 path_put(&path);
2395 }
2396 if (IS_ERR(file)) {
2397 put_unused_fd(fd);
2398 return PTR_ERR(file);
2399 }
2400 fd_install(fd, file);
2401 return fd;
2402 }
2403
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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