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| author | David Howells <[email protected]> | 2010-08-04 15:59:14 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2010-08-04 18:17:10 +0000 |
| commit | 694f690d27dadccc8cb9d90532e76593b61fe098 (patch) | |
| tree | ea641e53ae530d0d3708fbfcab8109cc5e840d21 /fs/jbd/commit.c | |
| parent | block_dev: always serialize exclusive open attempts (diff) | |
| download | kernel-694f690d27dadccc8cb9d90532e76593b61fe098.tar.gz kernel-694f690d27dadccc8cb9d90532e76593b61fe098.zip | |
CRED: Fix RCU warning due to previous patch fixing __task_cred()'s checks
Commit 8f92054e7ca1 ("CRED: Fix __task_cred()'s lockdep check and banner
comment") fixed the lockdep checks on __task_cred(). This has shown up
a place in the signalling code where a lock should be held - namely that
check_kill_permission() requires its callers to hold the RCU lock.
Fix group_send_sig_info() to get the RCU read lock around its call to
check_kill_permission().
Without this patch, the following warning can occur:
===================================================
[ INFO: suspicious rcu_dereference_check() usage. ]
---------------------------------------------------
kernel/signal.c:660 invoked rcu_dereference_check() without protection!
...
Reported-by: Tetsuo Handa <[email protected]>
Signed-off-by: David Howells <[email protected]>
Acked-by: Oleg Nesterov <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'fs/jbd/commit.c')
0 files changed, 0 insertions, 0 deletions