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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-07 14:17:26 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-07 14:17:26 -0400 |
| commit | 78438ce18f26dbcaa8993bb45d20ffb0cec3bc3e (patch) | |
| tree | 2f6fe2eb05296a410a44ee7d602cafe2d202467b /Documentation/filesystems | |
| parent | 168e153d5ebbdd6a3fa85db1cc4879ed4b7030e0 (diff) | |
| parent | ce285c267a003acbf607f3540ff71287f82e5282 (diff) | |
Merge branch 'stable-fodder' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs stable fodder fixes from Al Viro:
- acct_on() fix for deadlock caught by overlayfs folks
- autofs RCU use-after-free SNAFU (->d_manage() can be called
locklessly, so we need to RCU-delay freeing the objects it looks at)
- (hopefully) the end of "do we need freeing this dentry RCU-delayed"
whack-a-mole.
* 'stable-fodder' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
autofs: fix use-after-free in lockless ->d_manage()
dcache: sort the freeing-without-RCU-delay mess for good.
acct_on(): don't mess with freeze protection
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/porting | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting index b8d3ddd8b8db..d392d4b0c393 100644 --- a/Documentation/filesystems/porting +++ b/Documentation/filesystems/porting | |||
| @@ -663,3 +663,8 @@ in your dentry operations instead. | |||
| 663 | there, but that's it. Freeing memory in the callback is fine; doing | 663 | there, but that's it. Freeing memory in the callback is fine; doing |
| 664 | more than that is possible, but requires a lot of care and is best | 664 | more than that is possible, but requires a lot of care and is best |
| 665 | avoided. | 665 | avoided. |
| 666 | -- | ||
| 667 | [mandatory] | ||
| 668 | DCACHE_RCUACCESS is gone; having an RCU delay on dentry freeing is the | ||
| 669 | default. DCACHE_NORCU opts out, and only d_alloc_pseudo() has any | ||
| 670 | business doing so. | ||