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vfs: coredumping fix

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fix: http://bugzilla.kernel.org/show_bug.cgi?id=3043

only allow coredumping to the same uid that the coredumping
task runs under.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Alan Cox <alan@redhat.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Al Viro <viro@ftp.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ingo Molnar 2007-11-28 13:59:18 +01:00 committed by Linus Torvalds
parent a531a14108
commit c46f739dd3
1 changed files with 6 additions and 0 deletions
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6
fs/exec.c
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@ -1780,6 +1780,12 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
but keep the previous behaviour for now. */
if (!ispipe && !S_ISREG(inode->i_mode))
goto close_fail;
/*
* Dont allow local users get cute and trick others to coredump
* into their pre-created files:
*/
if (inode->i_uid != current->fsuid)
goto close_fail;
if (!file->f_op)
goto close_fail;
if (!file->f_op->write)