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| author | Al Viro <[email protected]> | 2025-06-01 18:23:52 +0000 |
|---|---|---|
| committer | Al Viro <[email protected]> | 2025-06-07 04:37:38 +0000 |
| commit | 1f282cdc1d219c4a557f7009e81bc792820d9d9a (patch) | |
| tree | 06c228aaf056a1e93d2fb6f353bc780c8a06cbbe /drivers/fpga/tests/fpga-mgr-test.c | |
| parent | Merge tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs (diff) | |
| download | kernel-1f282cdc1d219c4a557f7009e81bc792820d9d9a.tar.gz kernel-1f282cdc1d219c4a557f7009e81bc792820d9d9a.zip | |
fs/fhandle.c: fix a race in call of has_locked_children()
may_decode_fh() is calling has_locked_children() while holding no locks.
That's an oopsable race...
The rest of the callers are safe since they are holding namespace_sem and
are guaranteed a positive refcount on the mount in question.
Rename the current has_locked_children() to __has_locked_children(), make
it static and switch the fs/namespace.c users to it.
Make has_locked_children() a wrapper for __has_locked_children(), calling
the latter under read_seqlock_excl(&mount_lock).
Reviewed-by: Christian Brauner <[email protected]>
Reviewed-by: Jeff Layton <[email protected]>
Fixes: 620c266f3949 ("fhandle: relax open_by_handle_at() permission checks")
Signed-off-by: Al Viro <[email protected]>
Diffstat (limited to 'drivers/fpga/tests/fpga-mgr-test.c')
0 files changed, 0 insertions, 0 deletions