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authorIngo Molnar <mingo@elte.hu>2008-01-21 02:20:19 +0200
committerAdrian Bunk <bunk@kernel.org>2008-01-21 02:20:19 +0200
commit0b8a0a777d2d114f84716117ffb36a3d3644b7fe (patch)
tree6c26d02c009a3589d591702f27f3cd5977f69f2b /fs
parentb39c2791e24103cd13375843cb48a5046395902d (diff)
downloadlinux-linaro-stable-0b8a0a777d2d114f84716117ffb36a3d3644b7fe.tar.gz
vfs: coredumping fix (CVE-2007-6206)
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> Signed-off-by: Adrian Bunk <bunk@kernel.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/exec.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 91a36b27ec91..f28672f6a172 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1512,6 +1512,12 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
if (!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)