Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Steven Rostedt (VMware) 7da261e6bb tracing / histogram: Give calculation hist_fields a size ... commit 2c05caa7ba8803209769b9e4fe02c38d77ae88d0 upstream. When working on my user space applications, I found a bug in the synthetic event code where the automated synthetic event field was not matching the event field calculation it was attached to. Looking deeper into it, it was because the calculation hist_field was not given a size. The synthetic event fields are matched to their hist_fields either by having the field have an identical string type, or if that does not match, then the size and signed values are used to match the fields. The problem arose when I tried to match a calculation where the fields were "unsigned int". My tool created a synthetic event of type "u32". But it failed to match. The string was: diff=field1-field2:onmatch(event).trace(synth,$diff) Adding debugging into the kernel, I found that the size of "diff" was 0. And since it was given "unsigned int" as a type, the histogram fallback code used size and signed. The signed matched, but the size of u32 (4) did not match zero, and the event failed to be created. This can be worse if the field you want to match is not one of the acceptable fields for a synthetic event. As event fields can have any type that is supported in Linux, this can cause an issue. For example, if a type is an enum. Then there's no way to use that with any calculations. Have the calculation field simply take on the size of what it is calculating. Link: https://lkml.kernel.org/r/20210730171951.59c7743f@oasis.local.home Cc: Tom Zanussi <zanussi@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: stable@vger.kernel.org Fixes: 100719dcef ("tracing: Add simple expression support to hist triggers") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-08-12 13:21:00 +02:00
..
bpf	bpf: Fix leakage under speculation on mispredicted branches	2021-08-08 09:04:08 +02:00
cgroup	cgroup1: fix leaked context root causing sporadic NULL deref in LTP	2021-07-31 08:19:37 +02:00
configs
debug	kdb: Make memory allocations more robust	2021-03-04 10:26:10 +01:00
dma	swiotlb: fix "x86: Don't panic if can not alloc buffer for swiotlb"	2020-11-18 19:20:32 +01:00
events	perf: Fix data race between pin_count increment/decrement	2021-06-16 11:59:44 +02:00
gcov	gcov: re-fix clang-11+ support	2021-04-14 08:24:10 +02:00
irq	genirq/matrix: Prevent allocation counter corruption	2021-05-11 14:04:05 +02:00
livepatch
locking	lockding/lockdep: Avoid to find wrong lock dep path in check_irq_usage()	2021-07-14 16:53:15 +02:00
power	PM: EM: postpone creating the debugfs dir till fs_initcall	2021-03-30 14:35:28 +02:00
printk	printk: fix deadlock when kernel panic	2021-03-04 10:26:50 +01:00
rcu	srcu: Fix broken node geometry after early ssp init	2021-07-20 16:10:41 +02:00
sched	sched/fair: Fix CFS bandwidth hrtimer expiry type	2021-07-25 14:35:13 +02:00
time	clocksource: Retry clock read if long delays detected	2021-07-14 16:53:18 +02:00
trace	tracing / histogram: Give calculation hist_fields a size	2021-08-12 13:21:00 +02:00
.gitignore	kbuild: update config_data.gz only when the content of .config is changed	2021-05-11 14:04:16 +02:00
acct.c
async.c
audit.c	audit: fix a net reference leak in audit_list_rules_send()	2020-06-22 09:30:59 +02:00
audit.h	audit: fix a net reference leak in audit_list_rules_send()	2020-06-22 09:30:59 +02:00
audit_fsnotify.c
audit_tree.c
audit_watch.c	audit: CONFIG_CHANGE don't log internal bookkeeping as an event	2020-10-01 13:17:32 +02:00
auditfilter.c	audit: fix a net reference leak in audit_list_rules_send()	2020-06-22 09:30:59 +02:00
auditsc.c
backtracetest.c
bounds.c
capability.c
compat.c
configs.c
context_tracking.c
cpu.c	cpu/hotplug: Cure the cpusets trainwreck	2021-07-19 08:53:15 +02:00
cpu_pm.c	kernel/cpu_pm: Fix uninitted local in cpu_pm	2020-06-22 09:31:22 +02:00
crash_core.c
crash_dump.c
cred.c
delayacct.c
dma.c
exec_domain.c
exit.c	don't dump the threads that had been already exiting when zapped.	2020-11-18 19:20:31 +01:00
extable.c
fail_function.c	fail_function: Remove a redundant mutex unlock	2020-11-24 13:29:18 +01:00
fork.c	exec: Transform exec_update_mutex into a rw_semaphore	2021-01-09 13:44:55 +01:00
freezer.c
futex.c	mm, futex: fix shared futex pgoff on shmem huge page	2021-06-30 08:47:55 -04:00
gen_kheaders.sh	kbuild: add variables for compression tools	2020-09-03 11:27:10 +02:00
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c
kallsyms.c	kallsyms: Refactor kallsyms_show_value() to take cred	2020-07-16 08:16:44 +02:00
kcmp.c	exec: Transform exec_update_mutex into a rw_semaphore	2021-01-09 13:44:55 +01:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c
kexec.c
kexec_core.c	kernel: kexec: remove the lock operation of system_transition_mutex	2021-02-03 23:25:56 +01:00
kexec_elf.c
kexec_file.c	kernel: kexec_file: fix error return code of kexec_calculate_store_digests()	2021-05-19 10:08:28 +02:00
kexec_internal.h
kheaders.c
kmod.c
kprobes.c	tracing/kprobe: Fix to support kretprobe events on unloaded modules	2021-02-13 13:52:54 +01:00
ksysfs.c
kthread.c	kthread_worker: fix return value when kthread_mod_delayed_work() races with kthread_cancel_delayed_work_sync()	2021-07-14 16:53:19 +02:00
latencytop.c
Makefile	kbuild: update config_data.gz only when the content of .config is changed	2021-05-11 14:04:16 +02:00
module-internal.h
module.c	module: limit enabling module.sig_enforce	2021-06-30 08:47:42 -04:00
module_signature.c	module: harden ELF info handling	2021-04-07 14:47:38 +02:00
module_signing.c	module: harden ELF info handling	2021-04-07 14:47:38 +02:00
notifier.c	kernel/notifier.c: intercept duplicate registrations to avoid infinite loops	2020-10-01 13:17:23 +02:00
nsproxy.c
padata.c	padata: add separate cpuhp node for CPUHP_PADATA_DEAD	2020-06-17 16:40:22 +02:00
panic.c
params.c
pid.c
pid_namespace.c
profile.c
ptrace.c	ptrace: make ptrace() fail if the tracee changed its pid unexpectedly	2021-05-26 12:05:15 +02:00
range.c
reboot.c	reboot: fix overflow parsing reboot cpu number	2020-11-18 19:20:30 +01:00
relay.c	kernel/relay.c: fix memleak on destroy relay channel	2020-08-26 10:40:51 +02:00
resource.c	/dev/mem: Revoke mappings when a driver claims the region	2020-06-24 17:50:35 +02:00
rseq.c
seccomp.c	seccomp: Add missing return in non-void function	2021-03-04 10:26:45 +01:00
signal.c	ptrace: fix task_join_group_stop() for the case when current is traced	2020-11-10 12:37:24 +01:00
smp.c	smp: Fix smp_call_function_single_async prototype	2021-05-14 09:44:33 +02:00
smpboot.c	kthread: Extract KTHREAD_IS_PER_CPU	2021-02-07 15:35:49 +01:00
smpboot.h
softirq.c
stackleak.c
stacktrace.c
stop_machine.c
sys.c	kernel/sys.c: avoid copying possible padding bytes in copy_to_user	2020-10-01 13:17:23 +02:00
sys_ni.c
sysctl-test.c	kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec()	2020-10-01 13:17:10 +02:00
sysctl.c	sysctl.c: fix underflow value setting risk in vm_table	2021-03-17 17:03:45 +01:00
sysctl_binary.c
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c	tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing	2021-07-14 16:53:08 +02:00
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c	usermodehelper: reset umask to default before executing user process	2020-10-14 10:32:58 +02:00
up.c	smp: Fix smp_call_function_single_async prototype	2021-05-14 09:44:33 +02:00
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
watchdog.c
watchdog_hld.c
workqueue.c	workqueue: fix UAF in pwq_unbound_release_workfn()	2021-07-31 08:19:37 +02:00
workqueue_internal.h