kernel.git/fs/binfmt_aout.c, branch linux-2.6.28.y

tracehook: exec

2008-07-26T19:00:08Z

This moves all the ptrace hooks related to exec into tracehook.h inlines. This also lifts the calls for tracing out of the binfmt load_binary hooks into search_binary_handler() after it calls into the binfmt module. This change has no effect, since all the binfmt modules' load_binary functions did the call at the end on success, and now search_binary_handler() does it immediately after return if successful. We consolidate the repeated code, and binfmt modules no longer need to import ptrace_notify(). Signed-off-by: Roland McGrath Cc: Oleg Nesterov Reviewed-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fs/binfmt_aout.c: use printk_ratelimit()

2008-04-29T15:06:04Z

Use printk_ratelimit() instead of jiffies based arithmetic, suggested by Geert Uytterhoeven Signed-off-by: S.Caglar Onur Cc: Geert Uytterhoeven Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

aout: suppress A.OUT library support if !CONFIG_ARCH_SUPPORTS_AOUT

2008-02-08T17:22:30Z

Suppress A.OUT library support if CONFIG_ARCH_SUPPORTS_AOUT is not set. Not all architectures support the A.OUT binfmt, so the ELF binfmt should not be permitted to go looking for A.OUT libraries to load in such a case. Not only that, but under such conditions A.OUT core dumps are not produced either. To make this work, this patch also does the following: (1) Makes the existence of the contents of linux/a.out.h contingent on CONFIG_ARCH_SUPPORTS_AOUT. (2) Renames dump_thread() to aout_dump_thread() as it's only called by A.OUT core dumping code. (3) Moves aout_dump_thread() into asm/a.out-core.h and makes it inline. This is then included only where needed. This means that this bit of arch code will be stored in the appropriate A.OUT binfmt module rather than the core kernel. (4) Drops A.OUT support for Blackfin (according to Mike Frysinger it's not needed) and FRV. This patch depends on the previous patch to move STACK_TOP[_MAX] out of asm/a.out.h and into asm/processor.h as they're required whether or not A.OUT format is available. [jdike@addtoit.com: uml: re-remove accidentally restored code] Signed-off-by: David Howells Cc: Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Sanitize the type of struct user.u_ar0

2008-02-07T16:42:30Z

struct user.u_ar0 is defined to contain a pointer offset on all architectures in which it is defined (all architectures which define an a.out format except SPARC.) However, it has a pointer type in the headers, which is pointless -- is not exported to userspace, and it just makes the code messy. Redefine the field as "unsigned long" (which is the same size as a pointer on all Linux architectures) and change the setting code to user offsetof() instead of hand-coded arithmetic. Cc: Linux Arch Mailing List Cc: Bryan Wu Cc: Roman Zippel Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Russell King Cc: Lennert Buytenhek Cc: Håvard Skinnemoen Cc: Mikael Starvik Cc: Yoshinori Sato Cc: Tony Luck Cc: Hirokazu Takata Cc: Ralf Baechle Cc: Paul Mackerras Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: Paul Mundt Signed-off-by: H. Peter Anvin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: fix exit_mmap BUG() on a.out binary exit

2007-12-20T15:49:53Z

The problem was introduced by commit "mm: variable length argument support" (b6a2fea39318e43fee84fa7b0b90d68bed92d2ba) as it didn't update fs/binfmt_aout.c like other binfmt's. I noticed that on alpha when accidentally launched old OSF/1 Acrobat Reader binary. Obviously, other architectures are affected as well. Signed-off-by: Ivan Kokshaysky Cc: Ollie Wild Acked-by: Peter Zijlstra Cc: Andrew Morton Cc: Hugh Dickins Cc: Adrian Bunk Signed-off-by: Linus Torvalds

core_pattern: ignore RLIMIT_CORE if core_pattern is a pipe

2007-10-17T15:42:50Z

For some time /proc/sys/kernel/core_pattern has been able to set its output destination as a pipe, allowing a user space helper to receive and intellegently process a core. This infrastructure however has some shortcommings which can be enhanced. Specifically: 1) The coredump code in the kernel should ignore RLIMIT_CORE limitation when core_pattern is a pipe, since file system resources are not being consumed in this case, unless the user application wishes to save the core, at which point the app is restricted by usual file system limits and restrictions. 2) The core_pattern code should be able to parse and pass options to the user space helper as an argv array. The real core limit of the uid of the crashing proces should also be passable to the user space helper (since it is overridden to zero when called). 3) Some miscellaneous bugs need to be cleaned up (specifically the recognition of a recursive core dump, should the user mode helper itself crash. Also, the core dump code in the kernel should not wait for the user mode helper to exit, since the same context is responsible for writing to the pipe, and a read of the pipe by the user mode helper will result in a deadlock. This patch: Remove the check of RLIMIT_CORE if core_pattern is a pipe. In the event that core_pattern is a pipe, the entire core will be fed to the user mode helper. Signed-off-by: Neil Horman Cc: Cc: Cc: Jeremy Fitzhardinge Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] VFS: change struct file to use struct path

2006-12-08T16:28:41Z

This patch changes struct file to use struct path instead of having independent pointers to struct dentry and struct vfsmount, and converts all users of f_{dentry,vfsmnt} in fs/ to use f_path.{dentry,mnt}. Additionally, it adds two #define's to make the transition easier for users of the f_dentry and f_vfsmnt. Signed-off-by: Josef "Jeff" Sipek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Require mmap handler for a.out executables

2006-09-29T16:18:08Z

Files supported by fs/proc/base.c, i.e. /proc//*, are not capable of meeting the validity checks in ELF load_elf_*() handling because they have no mmap handler which is required by ELF. In order to stop a.out executables being used as part of an exploit attack against /proc-related vulnerabilities, we make a.out executables depend on ->mmap() existing. Signed-off-by: Eugene Teo Signed-off-by: Marcel Holtmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] dump_thread() cleanup

2006-01-10T16:01:25Z

) From: Adrian Bunk - create one common dump_thread() prototype in kernel.h - dump_thread() is only used in fs/binfmt_aout.c and can therefore be removed on all architectures where CONFIG_BINFMT_AOUT is not available Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] mm: mm_init set_mm_counters

2005-10-30T04:40:38Z

How is anon_rss initialized? In dup_mmap, and by mm_alloc's memset; but that's not so good if an mm_counter_t is a special type. And how is rss initialized? By set_mm_counter, all over the place. Come on, we just need to initialize them both at once by set_mm_counter in mm_init (which follows the memcpy when forking). Signed-off-by: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds