diff options
| author | Andreas Gruenbacher <[email protected]> | 2016-11-15 10:06:40 +0000 |
|---|---|---|
| committer | Paul Moore <[email protected]> | 2016-11-22 22:44:02 +0000 |
| commit | 9287aed2ad1ff1bde5eb190bcd6dccd5f1cf47d3 (patch) | |
| tree | 0d57e7ecdbf0d7c2ac9c377a4a53c5c9b135d38d /scripts/selinux/genheaders/genheaders.c | |
| parent | selinux: keep SELinux in sync with new capability definitions (diff) | |
| download | kernel-9287aed2ad1ff1bde5eb190bcd6dccd5f1cf47d3.tar.gz kernel-9287aed2ad1ff1bde5eb190bcd6dccd5f1cf47d3.zip | |
selinux: Convert isec->lock into a spinlock
Convert isec->lock from a mutex into a spinlock. Instead of holding
the lock while sleeping in inode_doinit_with_dentry, set
isec->initialized to LABEL_PENDING and release the lock. Then, when
the sid has been determined, re-acquire the lock. If isec->initialized
is still set to LABEL_PENDING, set isec->sid; otherwise, the sid has
been set by another task (LABEL_INITIALIZED) or invalidated
(LABEL_INVALID) in the meantime.
This fixes a deadlock on gfs2 where
* one task is in inode_doinit_with_dentry -> gfs2_getxattr, holds
isec->lock, and tries to acquire the inode's glock, and
* another task is in do_xmote -> inode_go_inval ->
selinux_inode_invalidate_secctx, holds the inode's glock, and
tries to acquire isec->lock.
Signed-off-by: Andreas Gruenbacher <[email protected]>
[PM: minor tweaks to keep checkpatch.pl happy]
Signed-off-by: Paul Moore <[email protected]>
Diffstat (limited to 'scripts/selinux/genheaders/genheaders.c')
0 files changed, 0 insertions, 0 deletions