linux/ipc, branch v2.6.16

[PATCH] shmdt cannot detach not-alined shm segment cleanly.

2006-02-10T16:13:12Z

sys_shmdt() can manage shm segments which are covered by multiple vmas. (This can happen when a user uses mprotect() after shmat().) This works well if shm is aligned to PAGE_SIZE, but if not, the last segment cannot be detached. It is because a comparison in sys_shmdt() (vma->vm_end - addr) < size addr == return address of shmat() size == shmsize, argments to shmget() size should be aligned to PAGE_SIZE before being compared with vma->vm_end, which is aligned. Signed-off-by: KAMEZAWA Hiroyuki Cc: Manfred Spraul Acked-by: Hugh Dickins Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[NETLINK]: Fix a severe bug

2006-02-10T00:43:38Z

netlink overrun was broken while improvement of netlink. Destination socket is used in the place where it was meant to be source socket, so that now overrun is never sent to user netlink sockets, when it should be, and it even can be set on kernel socket, which results in complete deadlock of rtnetlink. Suggested fix is to restore status quo passing source socket as additional argument to netlink_attachskb(). A little explanation: overrun is set on a socket, when it failed to receive some message and sender of this messages does not or even have no way to handle this error. This happens in two cases: 1. when kernel sends something. Kernel never retransmits and cannot wait for buffer space. 2. when user sends a broadcast and the message was not delivered to some recipients. Signed-off-by: Alexey Kuznetsov Signed-off-by: David S. Miller

correct email address of Manfred Spraul

2006-01-15T01:43:54Z

I tried to send the forcedeth maintainer an email, but it came back with: "The mail address manfreds@colorfullife.com is not read anymore. Please resent your mail to manfred@ instead of manfreds@." This patch fixes this. Signed-off-by: Adrian Bunk

[PATCH] Fix double decrement of mqueue_mnt->mnt_count in sys_mq_open

2006-01-14T20:38:17Z

Fixed the refcounting on failure exits in sys_mq_open() and cleaned the logics up. Rules are actually pretty simple - dentry_open() expects vfsmount and dentry to be pinned down and it either transfers them into created struct file or drops them. Old code had been very confused in that area - if dentry_open() had failed either in do_open() or do_create(), we ended up dentry and mqueue_mnt dropped twice, once by dentry_open() cleanup and then by sys_mq_open(). Fix consists of making the rules for do_create() and do_open() same as for dentry_open() and updating the sys_mq_open() accordingly; that actually leads to more straightforward code and less work on normal path. Signed-off-by: Al Viro Signed-off-by: Linus Torvalds

[PATCH] move capable() to capability.h

2006-01-12T02:42:13Z

- Move capable() from sched.h to capability.h; - Use where capable() is used (in include/, block/, ipc/, kernel/, a few drivers/, mm/, security/, & sound/; many more drivers/ to go) Signed-off-by: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem

2006-01-09T23:59:24Z

This patch converts the inode semaphore to a mutex. I have tested it on XFS and compiled as much as one can consider on an ia64. Anyway your luck with it might be different. Modified-by: Ingo Molnar (finished the conversion) Signed-off-by: Jes Sorensen Signed-off-by: Ingo Molnar

[PATCH] ipc: expand shm_flags

2006-01-09T04:13:49Z

Unobfsucate this struct member Cc: Manfred Spraul Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] NOMMU: Make SYSV IPC SHM use ramfs facilities on NOMMU

2006-01-06T16:33:32Z

The attached patch makes the SYSV IPC shared memory facilities use the new ramfs facilities on a no-MMU kernel. The following changes are made: (1) There are now shmem_mmap() and shmem_get_unmapped_area() functions to allow the IPC SHM facilities to commune with the tiny-shmem and shmem code. (2) ramfs files now need resizing using do_truncate() rather than by modifying the inode size directly (see shmem_file_setup()). This causes ramfs to attempt to bind a block of pages of sufficient size to the inode. (3) CONFIG_SYSVIPC is no longer contingent on CONFIG_MMU. Signed-off-by: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Fix silly typo ("smb" vs "smp")

2005-12-24T20:19:38Z

Introduced by commit 6003a93e7bf6c02f33c02976ff364785d4273295

[PATCH] add missing memory barriers to ipc/sem.c

2005-12-24T20:13:27Z

Two smp_wmb() statements are missing in the sysv sem code: This could cause stack corruptions. The attached patch adds them. Signed-Off-By: Manfred Spraul Signed-off-by: Linus Torvalds