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| author | Al Viro <viro@zeniv.linux.org.uk> | 2008-04-22 05:11:59 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2008-04-25 09:23:53 -0400 |
| commit | fd8328be874f4190a811c58cd4778ec2c74d2c05 (patch) | |
| tree | b44ae8e99ce96a1a4739b04d4d1a23c40ab8b163 /fs/binfmt_som.c | |
| parent | 6b335d9c80d7f3c2a3f6545f664ae9007a0f3821 (diff) | |
| download | op-kernel-dev-fd8328be874f4190a811c58cd4778ec2c74d2c05.zip op-kernel-dev-fd8328be874f4190a811c58cd4778ec2c74d2c05.tar.gz | |
[PATCH] sanitize handling of shared descriptor tables in failing execve()
* unshare_files() can fail; doing it after irreversible actions is wrong
and de_thread() is certainly irreversible.
* since we do it unconditionally anyway, we might as well do it in do_execve()
and save ourselves the PITA in binfmt handlers, etc.
* while we are at it, binfmt_som actually leaked files_struct on failure.
As a side benefit, unshare_files(), put_files_struct() and reset_files_struct()
become unexported.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/binfmt_som.c')
| -rw-r--r-- | fs/binfmt_som.c | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c index 14c6352..fdc36bf 100644 --- a/fs/binfmt_som.c +++ b/fs/binfmt_som.c @@ -194,7 +194,6 @@ load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs) unsigned long som_entry; struct som_hdr *som_ex; struct som_exec_auxhdr *hpuxhdr; - struct files_struct *files; /* Get the exec-header */ som_ex = (struct som_hdr *) bprm->buf; @@ -221,15 +220,6 @@ load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs) goto out_free; } - files = current->files; /* Refcounted so ok */ - retval = unshare_files(); - if (retval < 0) - goto out_free; - if (files == current->files) { - put_files_struct(files); - files = NULL; - } - retval = get_unused_fd(); if (retval < 0) goto out_free; |
