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authorEric W. Biederman <ebiederm@xmission.com>2007-02-12 00:52:10 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 09:48:29 -0800
commitbc1fc6d88c646ea071de34250552051a63000d70 (patch)
tree37bf115305df3fefce7d0c68b531adfa92085d36 /fs/buffer.c
parent79a81aef769f3a188988ad16032ccfc445cfaa13 (diff)
[PATCH] ipc: save the ipc namespace while reading proc files
The problem we were assuming that current->nsproxy->ipc_ns would never change while someone has our file in /proc/sysvipc/ file open. Given that this can change with both unshare and by passing the file descriptor to another process that assumption is occasionally wrong. Therefore this patch causes /proc/sysvipc/* to cache the namespace and increment it's count when we open the file and to decrement the count when we close the file, ensuring consistent operation with no surprises. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Serge E. Hallyn <serue@us.ibm.com> Cc: Herbert Poetzl <herbert@13thfloor.at> Cc: Kirill Korotaev <dev@sw.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/buffer.c')
0 files changed, 0 insertions, 0 deletions