Alexei Starovoitov 8d3b7dce86 bpf: add support for %s specifier to bpf_trace_printk() ... %s specifier makes bpf program and kernel debugging easier. To make sure that trace_printk won't crash the unsafe string is copied into stack and unsafe pointer is substituted. The following C program: #include <linux/fs.h> int foo(struct pt_regs *ctx, struct filename *filename) { void *name = 0; bpf_probe_read(&name, sizeof(name), &filename->name); bpf_trace_printk("executed %s\n", name); return 0; } when attached to kprobe do_execve() will produce output in /sys/kernel/debug/tracing/trace_pipe : make-13492 [002] d..1 3250.997277: : executed /bin/sh sh-13493 [004] d..1 3250.998716: : executed /usr/bin/gcc gcc-13494 [002] d..1 3250.999822: : executed /usr/lib/gcc/x86_64-linux-gnu/4.7/cc1 gcc-13495 [002] d..1 3251.006731: : executed /usr/bin/as gcc-13496 [002] d..1 3251.011831: : executed /usr/lib/gcc/x86_64-linux-gnu/4.7/collect2 collect2-13497 [000] d..1 3251.012941: : executed /usr/bin/ld Suggested-by: Brendan Gregg <brendan.d.gregg@gmail.com> Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-08-28 16:27:27 -07:00
..
bpf	bpf: fix bpf_perf_event_read() loop upper bound	2015-08-12 16:42:50 -07:00
configs	kconfig: add xenconfig defconfig helper	2015-06-16 11:04:29 +01:00
debug	debug: prevent entering debug mode on panic/exception.	2015-02-19 12:39:03 -06:00
events	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-08-21 11:44:04 -07:00
gcov	gcov: add support for GCC 5.1	2015-06-30 19:44:57 -07:00
irq	genirq: Introduce irq_chip_set_type_parent() helper	2015-08-20 00:25:25 +02:00
livepatch	Merge branches 'for-4.1/upstream-fixes', 'for-4.2/kaslr' and 'for-4.2/upstream' into for-linus	2015-06-22 16:26:56 +02:00
locking	locking/pvqspinlock: Fix kernel panic in locking-selftest	2015-07-21 10:18:07 +02:00
power	Power management and ACPI fixes for v4.2-rc1	2015-07-01 14:17:44 -07:00
printk	printk: improve the description of /dev/kmsg line format	2015-06-30 19:44:59 -07:00
rcu	This patch series contains several clean ups and even a new trace clock	2015-06-26 14:02:43 -07:00
sched	sched/fair: Test list head instead of list entry in throttle_cfs_rq()	2015-07-06 14:15:08 +02:00
time	timer: Write timer->flags atomically	2015-08-18 15:31:16 +02:00
trace	bpf: add support for %s specifier to bpf_trace_printk()	2015-08-28 16:27:27 -07:00
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	locking/qrwlock: Rename QUEUE_RWLOCK to QUEUED_RWLOCKS	2015-05-12 09:46:00 +02:00
Kconfig.preempt	…
Makefile	make certificate list change message more useful	2015-07-02 16:42:13 -07:00
acct.c	acct: check FMODE_CAN_WRITE	2015-04-11 22:27:55 -04:00
async.c	…
audit.c	Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit	2015-06-27 13:53:16 -07:00
audit.h	Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit	2015-04-22 14:49:23 -07:00
audit_tree.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
audit_watch.c	VFS: audit: d_backing_inode() annotations	2015-04-15 15:06:55 -04:00
auditfilter.c	Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit	2015-02-11 20:07:47 -08:00
auditsc.c	Fix broken audit tests for exec arg len	2015-07-08 09:33:38 -07:00
backtracetest.c	…
bounds.c	…
capability.c	kernel: conditionally support non-root users, groups and capabilities	2015-04-15 16:35:22 -07:00
cgroup.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2015-07-03 15:20:57 -07:00
cgroup_freezer.c	…
compat.c	compat: cleanup coding in compat_get_bitmap() and compat_put_bitmap()	2015-06-04 23:57:18 +02:00
configs.c	…
context_tracking.c	context_tracking: Inherit TIF_NOHZ through forks instead of context switches	2015-05-07 12:02:51 +02:00
cpu.c	genirq: Revert sparse irq locking around __cpu_up() and move it to x86 for now	2015-07-15 10:39:17 +02:00
cpu_pm.c	…
cpuset.c	cpuset: use trialcs->mems_allowed as a temp variable	2015-08-10 11:18:41 -04:00
crash_dump.c	…
cred.c	kernel: conditionally support non-root users, groups and capabilities	2015-04-15 16:35:22 -07:00
delayacct.c	…
dma.c	…
elfcore.c	…
exec_domain.c	Remove rest of exec domains.	2015-04-12 21:03:31 +02:00
exit.c	exit,stats: /* obey this comment */	2015-06-25 17:00:43 -07:00
extable.c	…
fork.c	x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86	2015-07-18 03:42:51 +02:00
freezer.c	…
futex.c	Merge branch 'sched-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-06-24 14:46:01 -07:00
futex_compat.c	…
groups.c	kernel: conditionally support non-root users, groups and capabilities	2015-04-15 16:35:22 -07:00
hung_task.c	kernel/hung_task.c: change hung_task.c to use for_each_process_thread()	2015-04-15 16:35:22 -07:00
irq_work.c	…
jump_label.c	module, jump_label: Fix module locking	2015-05-27 11:09:50 +09:30
kallsyms.c	…
kcmp.c	…
kexec.c	kernel/panic/kexec: fix "crash_kexec_post_notifiers" option issue in oops path	2015-06-30 19:44:57 -07:00
kmod.c	usermodehelper: kill the kmod_thread_locker logic	2014-12-10 17:41:17 -08:00
kprobes.c	kprobes: makes kprobes/enabled works correctly for optimized kprobes.	2015-02-13 21:21:42 -08:00
ksysfs.c	…
kthread.c	kthread: export kthread functions	2015-08-07 04:39:41 +03:00
latencytop.c	…
module-internal.h	…
module.c	module: weaken locking assertion for oops path.	2015-07-29 06:13:22 +09:30
module_signing.c	…
notifier.c	rcu: Make SRCU optional by using CONFIG_SRCU	2015-01-06 11:04:29 -08:00
nsproxy.c	…
padata.c	padata: use %*pb[l] to print bitmaps including cpumasks and nodemasks	2015-02-13 21:21:38 -08:00
panic.c	kernel/panic/kexec: fix "crash_kexec_post_notifiers" option issue in oops path	2015-06-30 19:44:57 -07:00
params.c	Minor merge needed, due to function move.	2015-07-01 10:49:25 -07:00
pid.c	fork: report pid reservation failure properly	2015-04-17 09:04:06 -04:00
pid_namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-16 15:53:03 -08:00
profile.c	profile: use %*pb[l] to print bitmaps including cpumasks and nodemasks	2015-02-13 21:21:38 -08:00
ptrace.c	ptrace: ptrace_detach() can no longer race with SIGKILL	2015-04-17 09:04:06 -04:00
range.c	kernel: avoid overflow in cmp_range	2015-01-17 10:02:23 +13:00
reboot.c	kernel/reboot.c: add orderly_reboot for graceful reboot	2015-04-15 16:35:23 -07:00
relay.c	kernel/relay.c: use kvfree() in relay_free_page_array()	2015-06-30 19:44:59 -07:00
resource.c	mm: Fix bugs in region_is_ram()	2015-07-22 17:20:34 +02:00
seccomp.c	seccomp, filter: add and use bpf_prog_create_from_user from seccomp	2015-05-09 17:35:05 -04:00
signal.c	signal: fix information leak in copy_siginfo_to_user	2015-08-07 04:39:40 +03:00
smp.c	smp: Fix error case handling in smp_call_function_*()	2015-04-19 13:19:23 -07:00
smpboot.c	watchdog: add watchdog_cpumask sysctl to assist nohz	2015-06-24 17:49:40 -07:00
smpboot.h	…
softirq.c	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-02-09 15:24:03 -08:00
stacktrace.c	stacktrace: introduce snprint_stack_trace for buffer output	2014-12-13 12:42:48 -08:00
stop_machine.c	sched/stop_machine: Fix deadlock between multiple stop_two_cpus()	2015-06-19 10:03:12 +02:00
sys.c	prctl: more prctl(PR_SET_MM_*) checks	2015-06-25 17:00:37 -07:00
sys_ni.c	kernel: conditionally support non-root users, groups and capabilities	2015-04-15 16:35:22 -07:00
sysctl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2015-07-03 15:20:57 -07:00
sysctl_binary.c	kernel: add panic_on_warn	2014-12-10 17:41:10 -08:00
system_certificates.S	…
system_keyring.c	…
task_work.c	…
taskstats.c	netlink: make nlmsg_end() and genlmsg_end() void	2015-01-18 01:03:45 -05:00
test_kprobes.c	…
torture.c	rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()	2015-05-27 12:56:15 -07:00
tracepoint.c	…
tsacct.c	…
uid16.c	…
up.c	…
user-return-notifier.c	…
user.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2014-12-17 12:31:40 -08:00
user_namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2014-12-17 12:31:40 -08:00
utsname.c	…
utsname_sysctl.c	…
watchdog.c	watchdog: add watchdog_cpumask sysctl to assist nohz	2015-06-24 17:49:40 -07:00
workqueue.c	Minor merge needed, due to function move.	2015-07-01 10:49:25 -07:00
workqueue_internal.h	…