BMC/Intel-BMC/linux.git/security/selinux, branch v5.7.9

selinux: fix undefined return of cond_evaluate_expr

2020-06-24T15:49:19+00:00

commit 8231b0b9c322c894594fb42eb0eb9f93544a6acc upstream. clang static analysis reports an undefined return security/selinux/ss/conditional.c:79:2: warning: Undefined or garbage value returned to caller [core.uninitialized.UndefReturn] return s[0]; ^~~~~~~~~~~ static int cond_evaluate_expr( ... { u32 i; int s[COND_EXPR_MAXDEPTH]; for (i = 0; i < expr->len; i++) ... return s[0]; When expr->len is 0, the loop which sets s[0] never runs. So return -1 if the loop never runs. Cc: stable@vger.kernel.org Signed-off-by: Tom Rix Acked-by: Stephen Smalley Signed-off-by: Paul Moore Signed-off-by: Greg Kroah-Hartman

selinux: fix a double free in cond_read_node()/cond_read_list()

2020-06-24T15:49:19+00:00

commit aa449a7965a6172a89d48844c313708962216f1f upstream. Clang static analysis reports this double free error security/selinux/ss/conditional.c:139:2: warning: Attempt to free released memory [unix.Malloc] kfree(node->expr.nodes); ^~~~~~~~~~~~~~~~~~~~~~~ When cond_read_node fails, it calls cond_node_destroy which frees the node but does not poison the entry in the node list. So when it returns to its caller cond_read_list, cond_read_list deletes the partial list. The latest entry in the list will be deleted twice. So instead of freeing the node in cond_read_node, let list freeing in code_read_list handle the freeing the problem node along with all of the earlier nodes. Because cond_read_node no longer does any error handling, the goto's the error case are redundant. Instead just return the error code. Cc: stable@vger.kernel.org Fixes: 60abd3181db2 ("selinux: convert cond_list to array") Signed-off-by: Tom Rix Reviewed-by: Ondrej Mosnacek [PM: subject line tweaks] Signed-off-by: Paul Moore Signed-off-by: Greg Kroah-Hartman

selinux: fix double free

2020-06-24T15:49:19+00:00

commit 65de50969a77509452ae590e9449b70a22b923bb upstream. Clang's static analysis tool reports these double free memory errors. security/selinux/ss/services.c:2987:4: warning: Attempt to free released memory [unix.Malloc] kfree(bnames[i]); ^~~~~~~~~~~~~~~~ security/selinux/ss/services.c:2990:2: warning: Attempt to free released memory [unix.Malloc] kfree(bvalues); ^~~~~~~~~~~~~~ So improve the security_get_bools error handling by freeing these variables and setting their return pointers to NULL and the return len to 0 Cc: stable@vger.kernel.org Signed-off-by: Tom Rix Acked-by: Stephen Smalley Signed-off-by: Paul Moore Signed-off-by: Greg Kroah-Hartman

selinux: fix error return code in policydb_read()

2020-06-22T07:32:37+00:00

[ Upstream commit 4c09f8b6913a779ca0c70ea8058bf21537eebb3b ] Fix to return negative error code -ENOMEM from the kvcalloc() error handling case instead of 0, as done elsewhere in this function. Fixes: acdf52d97f82 ("selinux: convert to kvmalloc") Signed-off-by: Wei Yongjun Signed-off-by: Paul Moore Signed-off-by: Sasha Levin

Merge tag 'selinux-pr-20200430' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux

2020-04-30T23:35:45+00:00

Pull SELinux fixes from Paul Moore: "Two more SELinux patches to fix problems in the v5.7-rcX releases. Wei Yongjun's patch fixes a return code in an error path, and my patch fixes a problem where we were not correctly applying access controls to all of the netlink messages in the netlink_send LSM hook" * tag 'selinux-pr-20200430' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux: selinux: properly handle multiple messages in selinux_netlink_send() selinux: fix error return code in cond_read_list()

selinux: properly handle multiple messages in selinux_netlink_send()

2020-04-30T20:18:37+00:00

Fix the SELinux netlink_send hook to properly handle multiple netlink messages in a single sk_buff; each message is parsed and subject to SELinux access control. Prior to this patch, SELinux only inspected the first message in the sk_buff. Cc: stable@vger.kernel.org Reported-by: Dmitry Vyukov Reviewed-by: Stephen Smalley Signed-off-by: Paul Moore

selinux: fix error return code in cond_read_list()

2020-04-27T21:44:39+00:00

Fix to return negative error code -ENOMEM from the error handling case instead of 0, as done elsewhere in this function. Fixes: 60abd3181db2 ("selinux: convert cond_list to array") Signed-off-by: Wei Yongjun Reviewed-by: Ondrej Mosnacek Signed-off-by: Paul Moore

Merge tag 'selinux-pr-20200416' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux

2020-04-16T17:45:47+00:00

Pull SELinux fix from Paul Moore: "One small SELinux fix to ensure we cleanup properly on an error condition" * tag 'selinux-pr-20200416' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux: selinux: free str on error in str_read()

selinux: free str on error in str_read()

2020-04-15T21:23:16+00:00

In [see "Fixes:"] I missed the fact that str_read() may give back an allocated pointer even if it returns an error, causing a potential memory leak in filename_trans_read_one(). Fix this by making the function free the allocated string whenever it returns a non-zero value, which also makes its behavior more obvious and prevents repeating the same mistake in the future. Reported-by: coverity-bot Addresses-Coverity-ID: 1461665 ("Resource leaks") Fixes: c3a276111ea2 ("selinux: optimize storage of filename transitions") Signed-off-by: Ondrej Mosnacek Reviewed-by: Kees Cook Signed-off-by: Paul Moore

Merge tag 'spdx-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx

2020-04-03T20:12:26+00:00

Pull SPDX updates from Greg KH: "Here are three SPDX patches for 5.7-rc1. One fixes up the SPDX tag for a single driver, while the other two go through the tree and add SPDX tags for all of the .gitignore files as needed. Nothing too complex, but you will get a merge conflict with your current tree, that should be trivial to handle (one file modified by two things, one file deleted.) All three of these have been in linux-next for a while, with no reported issues other than the merge conflict" * tag 'spdx-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx: ASoC: MT6660: make spdxcheck.py happy .gitignore: add SPDX License Identifier .gitignore: remove too obvious comments