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authorAl Viro <viro@zeniv.linux.org.uk>2012-08-21 22:43:47 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-09-26 21:09:59 -0400
commit179e037fc1370288188cb1f90b81156d75a3cb2d (patch)
tree6dcc6fc5a2b2bc9e17258a178798475c95f40544
parentc3c073f808b22dfae15ef8412b6f7b998644139a (diff)
downloadop-kernel-dev-179e037fc1370288188cb1f90b81156d75a3cb2d.zip
op-kernel-dev-179e037fc1370288188cb1f90b81156d75a3cb2d.tar.gz
do_coredump(): make sure that descriptor table isn't shared
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/exec.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 3fc7468..beb05a9 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -2066,6 +2066,7 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs)
int retval = 0;
int flag = 0;
int ispipe;
+ struct files_struct *displaced;
bool need_nonrelative = false;
static atomic_t core_dump_count = ATOMIC_INIT(0);
struct coredump_params cprm = {
@@ -2219,6 +2220,12 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs)
goto close_fail;
}
+ /* get us an unshared descriptor table; almost always a no-op */
+ retval = unshare_files(&displaced);
+ if (retval)
+ goto close_fail;
+ if (displaced)
+ put_files_struct(displaced);
retval = binfmt->core_dump(&cprm);
if (retval)
current->signal->group_exit_code |= 0x80;
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