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| author | Peter Zijlstra <[email protected]> | 2020-03-04 10:28:31 +0000 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2020-03-06 10:06:15 +0000 |
| commit | 8019ad13ef7f64be44d4f892af9c840179009254 (patch) | |
| tree | 889b754b07fa844410d6782bc1b4473007a9bc99 /fs/btrfs/dev-replace.c | |
| parent | Linux 5.6-rc4 (diff) | |
| download | kernel-8019ad13ef7f64be44d4f892af9c840179009254.tar.gz kernel-8019ad13ef7f64be44d4f892af9c840179009254.zip | |
futex: Fix inode life-time issue
As reported by Jann, ihold() does not in fact guarantee inode
persistence. And instead of making it so, replace the usage of inode
pointers with a per boot, machine wide, unique inode identifier.
This sequence number is global, but shared (file backed) futexes are
rare enough that this should not become a performance issue.
Reported-by: Jann Horn <[email protected]>
Suggested-by: Linus Torvalds <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Diffstat (limited to 'fs/btrfs/dev-replace.c')
0 files changed, 0 insertions, 0 deletions