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locks: Don't allow mounts in user namespaces to enable mandatory locking

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Since no one uses mandatory locking and files with mandatory locks can
cause problems don't allow them in user namespaces.

Signed-off-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: Jeff Layton <[email protected]>
This commit is contained in:
Eric W. Biederman 2015-11-11 17:22:33 -06:00 • committed by Jeff Layton
commit 95ace75414
1 changed files with 1 additions and 1 deletions
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2
fs/namespace.c
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@ -1589,7 +1589,7 @@ static inline bool may_mandlock(void)
#ifndef CONFIG_MANDATORY_FILE_LOCKING
return false;
#endif
return true;
return capable(CAP_SYS_ADMIN);
}
/*