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Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Thu Nov 5 12:30:02 CET 2015 on sn-devel-104
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
If uid_wrapper is loaded but not enabled (UID_WRAPPER environment
variable not set), then we dereference a NULL pointer while forking.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
These binaires are not installed, so are only used in make test,
and there we need debug output.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Fri Oct 16 16:36:22 CEST 2015 on sn-devel-104
This allows us to use them in talloc as well.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Signed-off-by: Adrian Cochrane <adrianc@catalyst.net.nz>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Fri Aug 21 17:48:45 CEST 2015 on sn-devel-104
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Fri Aug 14 18:04:53 CEST 2015 on sn-devel-104
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Wed Jan 28 19:44:39 CET 2015 on sn-devel-104
When fork() is called here there is no need to disable uwrap as a whole.
This change disables only uwrap for the thread which called fork().
uwrap catches calls of pthread_create() and pthread_exit() functions
from libpthread library now.
Pair-Programmed-With: Andreas Schneider <asn@samba.org>
Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
uwrap_bind_symbol are now renamed to uwrap_bind_symbol_libc
and simlilar uwrap_bind_symbol_libpthread are introduced.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Introduce UWRAP_LOCK_ALL and UWRAP_UNLOCK_ALL which make
locking easier.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Also rename struct uwrap_libc_fns fns to uwrap_libc_symbols and
uwrap_load_lib_function to uwrap_bind_symbol (same for _uwrap_load_...
variant.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
We need to distinguish if the syscall is called from main process or
from a thread.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Don't call libc_getuid/getgid function twice.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
The address sanitzer will complain about our hack with variable function
attributes. This disables the checking of it.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
When thread changes uid/gid this change must be reflected to main
process.
Syscalls changes only uid/gid of thread. Call of libc functions changes
also uid/gid of main process.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Don't call getenv("UID_WRAPPER") on start of uwrap_init().
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Check only bool variable inside uwrap structure instead
of calling whole uid_init().
In the best case only one mutex lock is need when check.
NOTES:
* This patch uses __atomic_load gcc builtin function.
* uid_init() were moved outside uid_wrapper_enabled() function.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Patch moves uwrap_id_mutex before if (uwrap.initialised) statement
which can be passed by concurrent threads.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Patch adds libc_symbol_binding_mutex which guards global table of libc
functions and their lookup.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Library constructor is used for pthread_atfork call. Moved here because
pthread_atfork is cumulative and should be called only once.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
New macros UWRAP_LOCK/UNLOCK has been created and all calls to
pthread_mutex_lock/unlock has been replaced by these macros.
Signed-off-by: Robin Hack <hack.robin@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Dropping all supplementary groups is a common practice when changing
UIDs. This patch adds support for dropping all supplementary groups when
setgroups is called with size=0.
Signed-off-by: Jakub Hrozek <jakub.hrozek@gmail.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
