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authorLinus Torvalds <torvalds@linux-foundation.org>2022-09-12 17:53:46 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2022-09-12 17:53:46 -0400
commit6504d82f4440755d6fc1385532f84d0344243d61 (patch)
treefee3ccfa544e2279ba55ff60d598c06076d50e40 /fs/nfs/internal.h
parent62d1cea7d66ee690de398e281470e78e94d085f7 (diff)
parent13bd9014180425f5a35eaf3735971d582c299292 (diff)
Merge tag 'nfs-for-5.20-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust: - Fix SUNRPC call completion races with call_decode() that trigger a WARN_ON() - NFSv4.0 cannot support open-by-filehandle and NFS re-export - Revert "SUNRPC: Remove unreachable error condition" to allow handling of error conditions - Update suid/sgid mode bits after ALLOCATE and DEALLOCATE * tag 'nfs-for-5.20-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: Revert "SUNRPC: Remove unreachable error condition" NFSv4.2: Update mode bits after ALLOCATE and DEALLOCATE NFSv4: Turn off open-by-filehandle and NFS re-export for NFSv4.0 SUNRPC: Fix call completion races with call_decode()
Diffstat (limited to 'fs/nfs/internal.h')
-rw-r--r--fs/nfs/internal.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 27c720d71b4e..898dd95bc7a7 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -606,6 +606,31 @@ static inline gfp_t nfs_io_gfp_mask(void)
return GFP_KERNEL;
}
+/*
+ * Special version of should_remove_suid() that ignores capabilities.
+ */
+static inline int nfs_should_remove_suid(const struct inode *inode)
+{
+ umode_t mode = inode->i_mode;
+ int kill = 0;
+
+ /* suid always must be killed */
+ if (unlikely(mode & S_ISUID))
+ kill = ATTR_KILL_SUID;
+
+ /*
+ * sgid without any exec bits is just a mandatory locking mark; leave
+ * it alone. If some exec bits are set, it's a real sgid; kill it.
+ */
+ if (unlikely((mode & S_ISGID) && (mode & S_IXGRP)))
+ kill |= ATTR_KILL_SGID;
+
+ if (unlikely(kill && S_ISREG(mode)))
+ return kill;
+
+ return 0;
+}
+
/* unlink.c */
extern struct rpc_task *
nfs_async_rename(struct inode *old_dir, struct inode *new_dir,