linux/net/bridge/netfilter, branch v2.6.34.15

bridge: netfilter: fix information leak

2011-06-26T16:47:20Z

commit d846f71195d57b0bbb143382647c2c6638b04c5a upstream. Struct tmp is copied from userspace. It is not checked whether the "name" field is NULL terminated. This may lead to buffer overflow and passing contents of kernel stack as a module name to try_then_request_module() and, consequently, to modprobe commandline. It would be seen by all userspace processes. Signed-off-by: Vasiliy Kulikov Signed-off-by: Patrick McHardy Signed-off-by: Paul Gortmaker

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30T13:02:32Z

percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn

netfilter: ebtables: mark: add CONFIG_COMPAT support

2010-02-16T16:27:20Z

Add the required handlers to convert 32 bit ebtables mark match and match target structs to 64bit layout. Signed-off-by: Florian Westphal

netfilter: ebt_limit: add CONFIG_COMPAT support

2010-02-16T16:27:20Z

ebt_limit structure is larger on 64 bit systems due to "long" type used in the (kernel-only) data section. Setting .compatsize is enough in this case, these values have no meaning in userspace. Signed-off-by: Florian Westphal

netfilter: ebtables: try native set/getsockopt handlers, too

2010-02-16T16:27:19Z

ebtables can be compiled to perform userspace-side padding of structures. In that case, all the structures are already in the 'native' format expected by the kernel. This tries to determine what format the userspace program is using. For most set/getsockopts, this can be done by checking the len argument for sizeof(compat_ebt_replace) and re-trying the native handler on error. In case of EBT_SO_GET_ENTRIES, the native handler is tried first, it will error out early when checking the *len argument (the compat version has to defer this check until after iterating over the kernel data set once, to adjust for all the structure size differences). As this would cause error printks, remove those as well, as recommended by Bart de Schuymer. Signed-off-by: Florian Westphal

netfilter: ebtables: add CONFIG_COMPAT support

2010-02-16T16:27:19Z

Main code for 32 bit userland ebtables binary with 64 bit kernels support. Tested on x86_64 kernel only, using 64bit ebtables binary for output comparision. At least ebt_mark, m_mark and ebt_limit need CONFIG_COMPAT hooks, too. remaining problem: The ebtables userland makefile has: ifeq ($(shell uname -m),sparc64) CFLAGS+=-DEBT_MIN_ALIGN=8 -DKERNEL_64_USERSPACE_32 endif struct ebt_replace, ebt_entry_match etc. then contain userland-side padding, i.e. even if we are called from a 32 bit userland, the structures may already be in the right format. This problem is addressed in a follow-up patch. Signed-off-by: Florian Westphal

netfilter: ebtables: split update_counters into two functions

2010-02-16T16:27:05Z

allows to call do_update_counters() from upcoming CONFIG_COMPAT code instead of copy&pasting the same code. Signed-off-by: Florian Westphal

netfilter: ebtables: split copy_everything_to_user into two functions

2010-02-16T16:25:51Z

once CONFIG_COMPAT support is added to ebtables, the new copy_counters_to_user function can be called instead of duplicating code. Also remove last use of MEMPRINT, as requested by Bart De Schuymer. Signed-off-by: Florian Westphal

netfilter: ebtables: split do_replace into two functions

2010-02-16T16:25:21Z

once CONFIG_COMPAT support is merged this allows to call do_replace_finish() after doing the CONFIG_COMPAT conversion instead of copy & pasting this. Signed-off-by: Florian Westphal

netfilter: ebtables: avoid explicit XT_ALIGN() in match/targets

2010-02-15T17:16:26Z

This will cause trouble once CONFIG_COMPAT support is added to ebtables. xt_compat_*_offset() calculate the kernel/userland structure size delta using: XT_ALIGN(size) - COMPAT_XT_ALIGN(size) If the match/target sizes are aligned at registration time, delta is always zero. Should have zero effect for existing systems: xtables uses XT_ALIGN() whenever it deals with match/target sizes. Signed-off-by: Florian Westphal Signed-off-by: Patrick McHardy