user/sven/linux.git/kernel/module.c, branch v3.6.9

module: fix out-by-one error in kallsyms

2012-11-26T20:14:06Z

commit 59ef28b1f14899b10d6b2682c7057ca00a9a3f47 upstream. Masaki found and patched a kallsyms issue: the last symbol in a module's symtab wasn't transferred. This is because we manually copy the zero'th entry (which is always empty) then copy the rest in a loop starting at 1, though from src[0]. His fix was minimal, I prefer to rewrite the loops in more standard form. There are two loops: one to get the size, and one to copy. Make these identical: always count entry 0 and any defined symbol in an allocated non-init section. This bug exists since the following commit was introduced. module: reduce symbol table for loaded modules (v2) commit: 4a4962263f07d14660849ec134ee42b63e95ea9a LKML: http://lkml.org/lkml/2012/10/24/27 Reported-by: Masaki Kimura Signed-off-by: Rusty Russell Signed-off-by: Greg Kroah-Hartman

module: taint kernel when lve module is loaded

2012-10-21T16:32:41Z

commit c99af3752bb52ba3aece5315279a57a477edfaf1 upstream. Cloudlinux have a product called lve that includes a kernel module. This was previously GPLed but is now under a proprietary license, but the module continues to declare MODULE_LICENSE("GPL") and makes use of some EXPORT_SYMBOL_GPL symbols. Forcibly taint it in order to avoid this. Signed-off-by: Matthew Garrett Cc: Alex Lyashkov Signed-off-by: Rusty Russell Signed-off-by: Greg Kroah-Hartman

Guard check in module loader against integer overflow

2012-05-23T12:58:53Z

The check: if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) may not work if there's an overflow in the right-hand side of the condition. Signed-off-by: David Howells Signed-off-by: Rusty Russell

dynamic_debug: make dynamic-debug work for module initialization

2012-04-30T18:31:46Z

This introduces a fake module param $module.dyndbg. Its based upon Thomas Renninger's $module.ddebug boot-time debugging patch from https://lkml.org/lkml/2010/9/15/397 The 'fake' module parameter is provided for all modules, whether or not they need it. It is not explicitly added to each module, but is implemented in callbacks invoked from parse_args. For builtin modules, dynamic_debug_init() now directly calls parse_args(..., &ddebug_dyndbg_boot_params_cb), to process the params undeclared in the modules, just after the ddebug tables are processed. While its slightly weird to reprocess the boot params, parse_args() is already called repeatedly by do_initcall_levels(). More importantly, the dyndbg queries (given in ddebug_query or dyndbg params) cannot be activated until after the ddebug tables are ready, and reusing parse_args is cleaner than doing an ad-hoc parse. This reparse would break options like inc_verbosity, but they probably should be params, like verbosity=3. ddebug_dyndbg_boot_params_cb() handles both bare dyndbg (aka: ddebug_query) and module-prefixed dyndbg params, and ignores all other parameters. For example, the following will enable pr_debug()s in 4 builtin modules, in the order given: dyndbg="module params +p; module aio +p" module.dyndbg=+p pci.dyndbg For loadable modules, parse_args() in load_module() calls ddebug_dyndbg_module_params_cb(). This handles bare dyndbg params as passed from modprobe, and errors on other unknown params. Note that modprobe reads /proc/cmdline, so "modprobe foo" grabs all foo.params, strips the "foo.", and passes these to the kernel. ddebug_dyndbg_module_params_cb() is again called for the unknown params; it handles dyndbg, and errors on others. The "doing" arg added previously contains the module name. For non CONFIG_DYNAMIC_DEBUG builds, the stub function accepts and ignores $module.dyndbg params, other unknowns get -ENOENT. If no param value is given (as in pci.dyndbg example above), "+p" is assumed, which enables all pr_debug callsites in the module. The dyndbg fake parameter is not shown in /sys/module/*/parameters, thus it does not use any resources. Changes to it are made via the control file. Also change pr_info in ddebug_exec_queries to vpr_info, no need to see it all the time. Signed-off-by: Jim Cromie CC: Thomas Renninger CC: Rusty Russell Acked-by: Jason Baron Signed-off-by: Greg Kroah-Hartman

module: Remove module size limit

2012-03-26T02:20:53Z

Module size was limited to 64MB, this was legacy limitation due to vmalloc() which was removed a while ago. Limiting module size to 64MB is both pointless and affects real world use cases. Cc: Tim Abbott Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin Signed-off-by: Rusty Russell

module: move __module_get and try_module_get() out of line.

2012-03-26T02:20:52Z

With the preempt, tracepoint and everything, it's getting a bit chubby. For an Ubuntu-based config: Before: $ size -t `find * -name '*.ko'` | grep TOTAL 56199906 3870760 1606616 61677282 3ad1ee2 (TOTALS) $ size vmlinux text data bss dec hex filename 8509342 850368 3358720 12718430 c2115e vmlinux After: $ size -t `find * -name '*.ko'` | grep TOTAL 56183760 3867892 1606616 61658268 3acd49c (TOTALS) $ size vmlinux text data bss dec hex filename 8501842 849088 3358720 12709650 c1ef12 vmlinux Signed-off-by: Steven Rostedt Acked-by: Ingo Molnar Signed-off-by: Rusty Russell (made all out-of-line)

params: _initcall-like kernel parameters

2012-03-26T02:20:51Z

This patch adds a set of macros that can be used to declare kernel parameters to be parsed _before_ initcalls at a chosen level are executed. We rename the now-unused "flags" field of struct kernel_param as the level. It's signed, for when we use this for early params as well, in future. Linker macro collating init calls had to be modified in order to add additional symbols between levels that are later used by the init code to split the calls into blocks. Signed-off-by: Pawel Moll Signed-off-by: Rusty Russell

module: add kernel param to force disable module load

2012-03-26T02:20:50Z

Sometimes we need to test a kernel of same version with code or config option changes. We already have sysctl to disable module load, but add a kernel parameter will be more convenient. Since modules_disabled is int, so here use bint type in core_param. TODO: make sysctl accept bool and change modules_disabled to bool Signed-off-by: Dave Young Signed-off-by: Rusty Russell

error: implicit declaration of function 'module_flags_taint'

2012-01-16T00:21:07Z

Recent changes to kernel/module.c caused the following compile error: kernel/module.c: In function ‘show_taint’: kernel/module.c:1024:2: error: implicit declaration of function ‘module_flags_taint’ [-Werror=implicit-function-declaration] cc1: some warnings being treated as errors Correct this error by moving the definition of module_flags_taint outside of the #ifdef CONFIG_MODULE_UNLOAD section. Signed-off-by: Kevin Winchester Signed-off-by: Linus Torvalds

modules: sysfs - export: taint, coresize, initsize

2012-01-12T23:02:15Z

Recent tools do not want to use /proc to retrieve module information. A few values are currently missing from sysfs to replace the information available in /proc/modules. This adds /sys/module/*/{coresize,initsize,taint} attributes. TAINT_PROPRIETARY_MODULE (P) and TAINT_OOT_MODULE (O) flags are both always shown now, and do no longer exclude each other, also in /proc/modules. Replace the open-coded sysfs attribute initializers with the __ATTR() macro. Add the new attributes to Documentation/ABI. Cc: Lucas De Marchi Signed-off-by: Kay Sievers Signed-off-by: Rusty Russell