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| author | Ingo Molnar <mingo@elte.hu> | 2007-11-28 13:59:18 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-11-28 10:58:01 -0800 |
| commit | c46f739dd39db3b07ab5deb4e3ec81e1c04a91af (patch) | |
| tree | caa3688a25bdfab7671c465496e90ac2e5feea8f /fs/exec.c | |
| parent | a531a141089714efe39eca89593524fdf05104f2 (diff) | |
| download | linux-c46f739dd39db3b07ab5deb4e3ec81e1c04a91af.tar.gz linux-c46f739dd39db3b07ab5deb4e3ec81e1c04a91af.tar.bz2 linux-c46f739dd39db3b07ab5deb4e3ec81e1c04a91af.zip | |
vfs: coredumping fix
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>
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c index 4ccaaa4b13b2..282240afe99e 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -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) |