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Pavel Skripkin a94a60ef75 profiling: fix shift-out-of-bounds bugs 
commit 2d186afd04 upstream.

Syzbot reported shift-out-of-bounds bug in profile_init().
The problem was in incorrect prof_shift. Since prof_shift value comes from
userspace we need to clamp this value into [0, BITS_PER_LONG -1]
boundaries.

Second possible shiht-out-of-bounds was found by Tetsuo:
sample_step local variable in read_profile() had "unsigned int" type,
but prof_shift allows to make a BITS_PER_LONG shift. So, to prevent
possible shiht-out-of-bounds sample_step type was changed to
"unsigned long".

Also, "unsigned short int" will be sufficient for storing
[0, BITS_PER_LONG] value, that's why there is no need for
"unsigned long" prof_shift.

Link: https://lkml.kernel.org/r/20210813140022.5011-1-paskripkin@gmail.com
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Reported-and-tested-by: syzbot+e68c89a9510c159d9684@syzkaller.appspotmail.com
Suggested-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-09-26 13:39:48 +02:00
..
bpf
bpf: Fix pointer arithmetic mask tightening under state pruning
2021-09-22 11:47:59 +02:00
cgroup
cgroup1: don't allow '\n' in renaming
2021-06-16 11:54:59 +02:00
configs
…
debug
kdb: Make memory allocations more robust
2021-03-04 09:39:31 +01:00
dma
swiotlb: fix "x86: Don't panic if can not alloc buffer for swiotlb"
2020-11-18 19:18:51 +01:00
events
events: Reuse value read using READ_ONCE instead of re-reading it
2021-09-22 11:48:11 +02:00
gcov
…
irq
genirq/msi: Ensure deactivation on teardown
2021-08-26 08:36:40 -04:00
livepatch
…
locking
locking/mutex: Fix HANDOFF condition
2021-09-22 11:47:48 +02:00
power
PM: hibernate: flush swap writer after marking
2021-02-03 23:23:24 +01:00
printk
printk: fix deadlock when kernel panic
2021-03-04 09:39:57 +01:00
rcu
rcu: Fix missed wakeup of exp_wq waiters
2021-09-26 13:39:46 +02:00
sched
sched/deadline: Fix missing clock update in migrate_task_rq_dl()
2021-09-22 11:47:49 +02:00
time
hrtimer: Avoid double reprogramming in __hrtimer_start_range_ns()
2021-09-22 11:47:49 +02:00
trace
tracing/kprobe: Fix kprobe_on_func_entry() modification
2021-09-26 13:39:47 +02:00
.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
…
compat.c
…
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
cpu/hotplug: Cure the cpusets trainwreck
2021-07-20 16:16:04 +02:00
crash_core.c
…
crash_dump.c
…
cred.c
…
delayacct.c
…
dma.c
…
exec_domain.c
…
exit.c
futex: Mark the begin of futex exit explicitly
2021-01-30 13:32:11 +01:00
extable.c
…
fail_function.c
fail_function: Remove a redundant mutex unlock
2020-11-24 13:27:23 +01:00
fork.c
mm/hugetlb: initialize hugetlb_usage in mm_init
2021-09-22 11:48:09 +02:00
freezer.c
…
futex.c
mm, futex: fix shared futex pgoff on shmem huge page
2021-07-11 12:49:30 +02:00
groups.c
…
hung_task.c
…
iomem.c
…
irq_work.c
…
jump_label.c
locking/static_key: Fix false positive warnings on concurrent dec/inc
2021-03-04 09:39:30 +01:00
kallsyms.c
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kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
…
kexec_core.c
kernel: kexec: remove the lock operation of system_transition_mutex
2021-02-03 23:23:23 +01:00
kexec_file.c
kernel: kexec_file: fix error return code of kexec_calculate_store_digests()
2021-05-22 10:59:44 +02:00
kexec_internal.h
…
kexec.c
…
kmod.c
…
kprobes.c
tracing/kprobe: Fix to support kretprobe events on unloaded modules
2021-02-13 13:51:13 +01:00
ksysfs.c
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kthread.c
kthread: prevent deadlock when kthread_mod_delayed_work() races with kthread_cancel_delayed_work_sync()
2021-07-11 12:49:31 +02:00
latencytop.c
…
Makefile
elfcore: fix building with clang
2021-02-10 09:21:06 +01:00
memremap.c
…
module_signing.c
…
module-internal.h
…
module.c
module: limit enabling module.sig_enforce
2021-06-30 08:48:28 -04:00
notifier.c
…
nsproxy.c
…
padata.c
padata: add separate cpuhp node for CPUHP_PADATA_DEAD
2021-08-08 08:54:30 +02:00
panic.c
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params.c
…
pid_namespace.c
memcg: enable accounting for pids in nested pid namespaces
2021-09-22 11:48:09 +02:00
pid.c
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profile.c
profiling: fix shift-out-of-bounds bugs
2021-09-26 13:39:48 +02:00
ptrace.c
ptrace: make ptrace() fail if the tracee changed its pid unexpectedly
2021-05-26 11:48:32 +02:00
range.c
…
reboot.c
reboot: fix overflow parsing reboot cpu number
2020-11-18 19:18:52 +01:00
relay.c
…
resource.c
…
rseq.c
…
seccomp.c
seccomp: Add missing return in non-void function
2021-03-04 09:39:54 +01:00
signal.c
ptrace: fix task_join_group_stop() for the case when current is traced
2020-11-10 12:35:53 +01:00
smp.c
smp: Fix smp_call_function_single_async prototype
2021-05-22 10:59:39 +02:00
smpboot.c
kthread: Extract KTHREAD_IS_PER_CPU
2021-02-07 14:48:38 +01:00
smpboot.h
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softirq.c
…
stacktrace.c
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stop_machine.c
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sys_ni.c
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sys.c
prctl: allow to setup brk for et_dyn executables
2021-09-26 13:39:47 +02:00
sysctl_binary.c
…
sysctl.c
sysctl: handle overflow in proc_get_long
2021-02-07 14:48:37 +01:00
task_work.c
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taskstats.c
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test_kprobes.c
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torture.c
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tracepoint.c
tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing
2021-07-20 16:15:42 +02:00
tsacct.c
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ucount.c
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uid16.c
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uid16.h
…
umh.c
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up.c
smp: Fix smp_call_function_single_async prototype
2021-05-22 10:59:39 +02:00
user_namespace.c
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user-return-notifier.c
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user.c
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utsname_sysctl.c
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utsname.c
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watchdog_hld.c
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watchdog.c
…
workqueue_internal.h
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workqueue.c
workqueue: fix UAF in pwq_unbound_release_workfn()
2021-07-31 08:22:37 +02:00