Dmitry Antipov a6aeb73997 module: ensure that kobject_put() is safe for module type kobjects ... In 'lookup_or_create_module_kobject()', an internal kobject is created using 'module_ktype'. So call to 'kobject_put()' on error handling path causes an attempt to use an uninitialized completion pointer in 'module_kobject_release()'. In this scenario, we just want to release kobject without an extra synchronization required for a regular module unloading process, so adding an extra check whether 'complete()' is actually required makes 'kobject_put()' safe. Reported-by: syzbot+7fb8a372e1f6add936dd@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=7fb8a372e1f6add936dd Fixes: 942e443127e9 ("module: Fix mod->mkobj.kobj potentially freed too early") Cc: stable@vger.kernel.org Suggested-by: Petr Pavlu <petr.pavlu@suse.com> Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru> Link: https://lore.kernel.org/r/20250507065044.86529-1-dmantipov@yandex.ru Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>		2025-05-07 20:24:59 +02:00
..
bpf
cgroup
configs
debug
dma
entry
events
futex
gcov
irq
kcsan
livepatch
locking
module
power
printk
rcu
sched
time
trace
.gitignore
acct.c
async.c
audit_fsnotify.c
audit_tree.c
audit_watch.c
audit.c
audit.h
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
cfi.c
compat.c
configs.c
context_tracking.c
cpu_pm.c
cpu.c
crash_core.c
crash_reserve.c
cred.c
delayacct.c
dma.c
elfcorehdr.c
exec_domain.c
exit.c
exit.h
extable.c
fail_function.c
fork.c
freezer.c
gen_kheaders.sh
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c
kallsyms_internal.h
kallsyms_selftest.c
kallsyms_selftest.h
kallsyms.c
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.kexec
Kconfig.locks
Kconfig.preempt
kcov.c
kexec_core.c
kexec_elf.c
kexec_file.c
kexec_internal.h
kexec.c
kheaders.c
kprobes.c
ksyms_common.c
ksysfs.c
kthread.c
latencytop.c
Makefile
module_signature.c
notifier.c
nsproxy.c
padata.c
panic.c
params.c	module: ensure that kobject_put() is safe for module type kobjects	2025-05-07 20:24:59 +02:00
pid_namespace.c
pid_sysctl.h
pid.c
profile.c
ptrace.c
range.c
reboot.c
regset.c
relay.c
resource_kunit.c
resource.c
rseq.c
scftorture.c
scs.c
seccomp.c
signal.c
smp.c
smpboot.c
smpboot.h
softirq.c
stackleak.c
stacktrace.c
static_call_inline.c
static_call.c
stop_machine.c
sys_ni.c
sys.c
sysctl-test.c
sysctl.c
task_work.c
taskstats.c
torture.c
tracepoint.c
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c
up.c
user_namespace.c
user-return-notifier.c
user.c
usermode_driver.c
utsname_sysctl.c
utsname.c
vhost_task.c
vmcore_info.c
watch_queue.c
watchdog_buddy.c
watchdog_perf.c
watchdog.c
workqueue_internal.h
workqueue.c