[PATCH V9 0/3] audit by executable name

Please see the accompanying userspace patchset: https://www.redhat.com/archives/linux-audit/2015-July/thread.html [[PATCH V2] 0/2] Log on the future execution of a path The userspace interface is not expected to change appreciably unless something important has been overlooked. Setting and deleting rules works as expected. If the path does not exist at rule creation time, it will be re-evaluated every time there is a change to the parent directory at which point the change in device and inode will be noted. Here's a sample run: Test for addition, trigger and deletion of tree executable rule: # auditctl -a always,exit -S all -F dir=/tmp -F exe=/usr/bin/touch -F key=exetest_tree ---- time->Sat Jul 11 10:41:50 2015 type=CONFIG_CHANGE msg=audit(1436629310.720:44711): auid=0 ses=1 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 op="add_rule" key="exetest_tree" list=4 res=1 ---- # /usr/bin/touch /tmp/test ---- time->Sat Jul 11 10:41:50 2015 type=PROCTITLE msg=audit(1436629310.757:44712): proctitle=2F7573722F62696E2F746F756368002F746D702F74657374 type=PATH msg=audit(1436629310.757:44712): item=1 name="/tmp/test" inode=166932 dev=00:24 mode=0100644 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:user_tmp_t:s0 nametype=CREATE type=PATH msg=audit(1436629310.757:44712): item=0 name="/tmp/" inode=11525 dev=00:24 mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmp_t:s0 nametype=PARENT type=CWD msg=audit(1436629310.757:44712): cwd="/root" type=SYSCALL msg=audit(1436629310.757:44712): arch=c000003e syscall=2 success=yes exit=3 a0=7ffdee2f9e27 a1=941 a2=1b6 a3=691 items=2 ppid=17655 pid=17762 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=ttyS0 ses=1 comm="touch" exe="/usr/bin/touch" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key="exetest_tree" ---- # auditctl -d always,exit -S all -F dir=/tmp -F exe=/usr/bin/touch -F key=exetest_tree ---- time->Sat Jul 11 10:41:50 2015 type=CONFIG_CHANGE msg=audit(1436629310.839:44713): auid=0 ses=1 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 op="remove_rule" key="exetest_tree" list=4 res=1 ---- Revision history: v9: Fix a rebase manual merge error that mixed parts of two patches. v8: Re-spin due to mods to: "audit: save signal match info in case entry passed in is the one deleted" v7: Add Audit Feature Bitmap macro AUDIT_FEATURE_BITMAP_EXECUTABLE_PATH to AUDIT_FEATURE_BITMAP_ALL. Split out new patch to use macros for unset inode and device values. Remove BUG() usage in stubs. Rename audit_mark_free() to audit_fsnotify_mark_free(). Remove unused audit_get_mark() and audit_put_mark() functions. Rework ino and dev comparisons and assignments, using macros and existing funcs and eliminating temp variables. Move audit_update_mark() above its first usage. Move contents of kernel/audit_exe.c to kernel/audit_watch.c. Merge patch 3 with 1, merge patch 4 with 1 and 3 and rewrite the patch descriptions. Split out patch to audit by executable children. v6: Explicitly declare prototypes as external. Rename audit_dup_exe() to audit_dupe_exe() consistent with rule, watch, lsm_field. Rebased on v4.1. Rename audit_remove_mark_rule() called from audit_mark_handle_event() to audit_autoremove_mark_rule() to avoid confusion with audit_remove_{watch,tree}_rule() usage. Add audit_remove_mark_rule() to provide similar interface as audit_remove_{watch,tree}_rule(). Simplify stubs to defines. Rename audit_free_fsnotify_mark() to audit_fsnotify_free_mark() in keeping with the naming convention of inotify_free_mark(), dnotify_free_mark(), fanotify_free_mark(), audit_watch_free_mark(). Return -ENOMEM rather than null in case of memory allocation failure for audit_mark in audit_alloc_mark(). Rename audit_free_mark() to audit_mark_free() to avoid association with {i,d,fa}notify_free_mark() and audit_watch_free_mark(). Clean up exe with similar interface as watch and tree. Clean up audit exe mark just before audit_free_rule() rather than in it to avoid mutex in software interrupt context. Fixed bug in audit_dupe_exe() that returned error rather than valid pointer. v5: Revert patch "Let audit_free_rule() take care of calling audit_remove_mark()." since it caused a group mark deadlock. https://www.redhat.com/archives/linux-audit/2014-October/msg00024.html v4: Re-order and squash down fixups Fix audit_dup_exe() to copy pathname string before calling audit_alloc_mark(). https://www.redhat.com/archives/linux-audit/2014-August/msg00065.html v3: Rationalize and rename some function names and clean up get/put and free code. Rename several "watch" references to "mark". Rename audit_remove_rule() to audit_remove_mark_rule(). Let audit_free_rule() take care of calling audit_remove_mark(). Put audit_alloc_mark() arguments in same order as watch, tree and inode. Move the access to the entry for audit_match_signal() to the beginning of the function in case the entry found is the same one passed in. This will enable it to be used by audit_remove_mark_rule(). https://www.redhat.com/archives/linux-audit/2014-July/msg00000.html v2: Misguided attempt to add in audit_exe similar to watches https://www.redhat.com/archives/linux-audit/2014-June/msg00066.html v1.5: eparis' switch to fsnotify https://www.redhat.com/archives/linux-audit/2014-May/msg00046.html https://www.redhat.com/archives/linux-audit/2014-May/msg00066.html v1: Change to path interface instead of inode https://www.redhat.com/archives/linux-audit/2014-May/msg00017.html v0: Peter Moodie's original patches https://www.redhat.com/archives/linux-audit/2012-August/msg00033.html Future step: Get full-path notify working. Richard Guy Briggs (3): audit: clean simple fsnotify implementation audit: implement audit by executable audit: add audit by children of executable path include/linux/audit.h | 1 + include/uapi/linux/audit.h | 6 +- kernel/Makefile | 2 +- kernel/audit.h | 18 ++++ kernel/audit_fsnotify.c | 215 ++++++++++++++++++++++++++++++++++++++++++++ kernel/audit_tree.c | 2 + kernel/audit_watch.c | 31 +++++++ kernel/auditfilter.c | 60 ++++++++++++- kernel/auditsc.c | 14 +++ 9 files changed, 345 insertions(+), 4 deletions(-) create mode 100644 kernel/audit_fsnotify.c