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Naveen N. Rao b992f01e66 bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack() 
task_pt_regs() can return NULL on powerpc for kernel threads. This is
then used in __bpf_get_stack() to check for user mode, resulting in a
kernel oops. Guard against this by checking return value of
task_pt_regs() before trying to obtain the call chain.

Fixes: fa28dcb82a38f8 ("bpf: Introduce helper bpf_get_task_stack()")
Cc: stable@vger.kernel.org # v5.9+
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/d5ef83c361cc255494afd15ff1b4fb02a36e1dcf.1641468127.git.naveen.n.rao@linux.vnet.ibm.com
2022-01-15 12:21:23 +11:00
..
bpf
bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()
2022-01-15 12:21:23 +11:00
cgroup
Merge branch 'for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2022-01-11 09:14:37 -08:00
configs
drivers/char: remove /dev/kmem for good
2021-05-07 00:26:34 -07:00
debug
kdb: Adopt scheduler's task classification
2021-11-03 17:21:37 +00:00
dma
dma-direct: add a dma_direct_use_pool helper
2021-12-08 16:46:35 +01:00
entry
entry: Snapshot thread flags
2021-12-01 00:06:43 +01:00
events
Peter Zijlstra says:
2022-01-12 16:26:58 -08:00
futex
futex: Remove futex_cmpxchg detection
2021-11-25 00:02:28 +01:00
gcov
Kconfig: Introduce ARCH_WANTS_NO_INSTR and CC_HAS_NO_PROFILE_FN_ATTR
2021-06-22 11:07:18 -07:00
irq
Rework of the MSI interrupt infrastructure:
2022-01-13 09:05:29 -08:00
kcsan
KCSAN updates for v5.17
2022-01-11 09:51:26 -08:00
livepatch
Tracing updates for 5.16:
2021-11-01 20:05:19 -07:00
locking
Peter Zijlstra says:
2022-01-11 17:24:45 -08:00
power
PM: hibernate: Allow ACPI hardware signature to be honoured
2021-12-08 16:06:10 +01:00
printk
printk/console: Clean up boot console handling in register_console()
2021-12-06 14:07:57 +01:00
rcu
Merge branches 'doc.2021.11.30c', 'exp.2021.12.07a', 'fastnohz.2021.11.30c', 'fixes.2021.11.30c', 'nocb.2021.12.09a', 'nolibc.2021.11.30c', 'tasks.2021.12.09a', 'torture.2021.12.07a' and 'torturescript.2021.11.30c' into HEAD
2021-12-09 11:38:09 -08:00
sched
Peter Zijlstra says:
2022-01-11 17:24:45 -08:00
time
Updates for the time(r) subsystem:
2022-01-13 09:02:27 -08:00
trace
for-5.17/block-2022-01-11
2022-01-12 10:26:52 -08:00
.gitignore
.gitignore: prefix local generated files with a slash
2021-05-02 00:43:35 +09:00
acct.c
kernel: remove spurious blkdev.h includes
2021-10-18 06:17:01 -06:00
async.c
kernel/async.c: remove async_unregister_domain()
2021-05-07 00:26:33 -07:00
audit_fsnotify.c
fsnotify: clarify contract for create event hooks
2021-10-27 12:32:34 +02:00
audit_tree.c
audit: use struct_size() helper in kmalloc()
2021-12-14 17:39:42 -05:00
audit_watch.c
\n
2021-11-06 16:43:20 -07:00
audit.c
audit/stable-5.17 PR 20220110
2022-01-11 13:08:21 -08:00
audit.h
audit/stable-5.16 PR 20211101
2021-11-01 21:17:39 -07:00
auditfilter.c
audit/stable-5.17 PR 20220110
2022-01-11 13:08:21 -08:00
auditsc.c
lsm: security_task_getsecid_subj() -> security_current_getsecid_subj()
2021-11-22 17:52:47 -05:00
backtracetest.c
…
bounds.c
…
capability.c
capability: handle idmapped mounts
2021-01-24 14:27:16 +01:00
cfi.c
cfi: Use rcu_read_{un}lock_sched_notrace
2021-08-11 13:11:12 -07:00
compat.c
arch: remove compat_alloc_user_space
2021-09-08 15:32:35 -07:00
configs.c
…
context_tracking.c
…
cpu_pm.c
PM: cpu: Make notifier chain use a raw_spinlock_t
2021-08-16 18:55:32 +02:00
cpu.c
sched/scs: Reset task stack state in bringup_cpu()
2021-11-24 12:20:27 +01:00
crash_core.c
kernel/crash_core: suppress unknown crashkernel parameter warning
2021-12-25 12:20:55 -08:00
crash_dump.c
…
cred.c
ucounts: In set_cred_ucounts assume new->ucounts is non-NULL
2021-10-20 10:45:34 -05:00
delayacct.c
delayacct: Add sysctl to enable at runtime
2021-05-12 11:43:25 +02:00
dma.c
…
exec_domain.c
…
exit.c
Merge branch 'per_signal_struct_coredumps-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-11-03 12:15:29 -07:00
extable.c
extable: use is_kernel_text() helper
2021-11-09 10:02:51 -08:00
fail_function.c
fault-injection: handle EI_ETYPE_TRUE
2020-12-15 22:46:19 -08:00
fork.c
fork: move copy_io to block/blk-ioc.c
2021-11-29 06:41:29 -07:00
freezer.c
sched: Add get_current_state()
2021-06-18 11:43:08 +02:00
gen_kheaders.sh
kbuild: clean up ${quiet} checks in shell scripts
2021-05-27 04:01:50 +09:00
groups.c
groups: simplify struct group_info allocation
2021-02-26 09:41:03 -08:00
hung_task.c
Merge branch 'akpm' (patches from Andrew)
2021-07-02 12:08:10 -07:00
iomem.c
…
irq_work.c
irq_work: Also rcuwait for !IRQ_WORK_HARD_IRQ on PREEMPT_RT
2021-10-15 11:25:18 +02:00
jump_label.c
jump_label: Fix jump_label_text_reserved() vs __init
2021-07-05 10:46:20 +02:00
kallsyms.c
kallsyms: strip LTO suffixes from static functions
2021-10-04 10:58:25 -07:00
kcmp.c
Merge branch 'exec-update-lock-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:36:48 -08:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
locking/rwlock: Provide RT variant
2021-08-17 17:50:51 +02:00
Kconfig.preempt
preempt: Restore preemption model selection configs
2021-11-11 13:09:33 +01:00
kcov.c
kcov: replace local_irq_save() with a local_lock_t
2021-11-09 10:02:52 -08:00
kexec_core.c
Merge branch 'rework/printk_safe-removal' into for-linus
2021-08-30 16:36:10 +02:00
kexec_elf.c
…
kexec_file.c
memblock: add MEMBLOCK_DRIVER_MANAGED to mimic IORESOURCE_SYSRAM_DRIVER_MANAGED
2021-11-06 13:30:42 -07:00
kexec_internal.h
kexec: move machine_kexec_post_load() to public interface
2021-02-22 12:33:26 +00:00
kexec.c
kexec: avoid compat_alloc_user_space
2021-09-08 15:32:34 -07:00
kheaders.c
…
kmod.c
modules: add CONFIG_MODPROBE_PATH
2021-05-07 00:26:33 -07:00
kprobes.c
kprobes: Limit max data_size of the kretprobe instances
2021-12-01 21:04:34 -05:00
ksysfs.c
…
kthread.c
Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-11-10 16:15:54 -08:00
latencytop.c
…
Makefile
Tracing updates for 5.16:
2021-11-01 20:05:19 -07:00
module_signature.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module_signing.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module-internal.h
…
module.c
module: change to print useful messages from elf_validity_check()
2021-11-05 15:13:10 -07:00
notifier.c
notifier: Return an error when a callback has already been registered
2021-12-29 10:37:33 +01:00
nsproxy.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
padata.c
padata: Remove repeated verbose license text
2021-08-27 16:30:18 +08:00
panic.c
Merge branch 'rework/printk_safe-removal' into for-linus
2021-08-30 16:36:10 +02:00
params.c
kobject: remove kset from struct kset_uevent_ops callbacks
2021-12-28 11:26:18 +01:00
pid_namespace.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
pid.c
pid: add pidfd_get_task() helper
2021-10-14 13:29:18 +02:00
profile.c
profiling: fix shift-out-of-bounds bugs
2021-09-08 11:50:26 -07:00
ptrace.c
sched: Change task_struct::state
2021-06-18 11:43:09 +02:00
range.c
kernel.h: split out min()/max() et al. helpers
2020-10-16 11:11:19 -07:00
reboot.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2021-11-12 11:53:16 -08:00
regset.c
…
relay.c
relay: allow the use of const callback structs
2020-12-15 22:46:18 -08:00
resource_kunit.c
resource: provide meaningful MODULE_LICENSE() in test suite
2020-11-25 18:52:35 +01:00
resource.c
kernel/resource: disallow access to exclusive system RAM regions
2021-11-09 10:02:52 -08:00
rseq.c
KVM: rseq: Update rseq when processing NOTIFY_RESUME on xfer to KVM guest
2021-09-22 10:24:01 -04:00
scftorture.c
scftorture: Always log error message
2021-12-07 16:36:17 -08:00
scs.c
scs: Release kasan vmalloc poison in scs_free process
2021-09-30 09:37:27 +01:00
seccomp.c
Merge branch 'exit-cleanups-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-09-01 14:52:05 -07:00
signal.c
signal: Skip the altstack update when not needed
2021-12-14 13:08:36 -08:00
smp.c
sched: Improve wake_up_all_idle_cpus() take #2
2021-10-22 15:32:46 +02:00
smpboot.c
smpboot: Replace deprecated CPU-hotplug functions.
2021-08-10 14:57:42 +02:00
smpboot.h
…
softirq.c
timers/nohz: Last resort update jiffies on nohz_full IRQ entry
2021-12-02 15:07:22 +01:00
stackleak.c
…
stacktrace.c
stacktrace: move filter_irq_stacks() to kernel/stacktrace.c
2021-11-06 13:30:43 -07:00
static_call.c
static_call: Fix static_call_text_reserved() vs __init
2021-07-05 10:46:33 +02:00
stop_machine.c
stop_machine: Add caller debug info to queue_stop_cpus_work
2021-03-23 16:01:58 +01:00
sys_ni.c
futex: Implement sys_futex_waitv()
2021-10-07 13:51:11 +02:00
sys.c
Merge branch 'akpm' (patches from Andrew)
2021-09-08 12:55:35 -07:00
sysctl-test.c
kernel/sysctl-test: Remove some casts which are no-longer required
2021-06-23 16:41:24 -06:00
sysctl.c
net: Don't include filter.h from net/sock.h
2021-12-29 08:48:14 -08:00
task_work.c
kasan: record task_work_add() call stack
2021-04-30 11:20:42 -07:00
taskstats.c
treewide: rename nla_strlcpy to nla_strscpy.
2020-11-16 08:08:54 -08:00
torture.c
locktorture,rcutorture,torture: Always log error message
2021-12-07 16:36:17 -08:00
tracepoint.c
tracepoint: Fix kerneldoc comments
2021-08-16 11:39:51 -04:00
tsacct.c
mm/mmap.c: fix a data race of mm->total_vm
2021-11-06 13:30:35 -07:00
ucount.c
ucounts: Fix rlimit max values check
2021-12-09 15:37:18 -06:00
uid16.c
…
uid16.h
…
umh.c
kernel/umh.c: fix some spelling mistakes
2021-05-07 00:26:34 -07:00
up.c
A set of locking related fixes and updates:
2021-05-09 13:07:03 -07:00
user_namespace.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
user-return-notifier.c
…
user.c
fs/epoll: use a per-cpu counter for user's watches count
2021-09-08 11:50:27 -07:00
usermode_driver.c
Merge branch 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-07-03 11:41:14 -07:00
utsname_sysctl.c
…
utsname.c
…
watch_queue.c
watch_queue: rectify kernel-doc for init_watch()
2021-01-26 11:16:34 +00:00
watchdog_hld.c
…
watchdog.c
kernel: watchdog: modify the explanation related to watchdog thread
2021-06-29 10:53:46 -07:00
workqueue_internal.h
workqueue: Assign a color to barrier work items
2021-08-17 07:49:10 -10:00
workqueue.c
Merge branch 'workqueue/for-5.16-fixes' into workqueue/for-5.17
2022-01-10 07:54:04 -10:00