=============================
WARNING: suspicious RCU usage
4.17.0-rc2+ #42 Not tainted
-----------------------------
include/linux/rcupdate.h:304 Illegal context switch in RCU read-side critical section!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor3/19684:
#0: (ptrval) (rcu_read_lock){....}, at: rcu_read_lock+0x0/0x70 include/linux/compiler.h:188
stack backtrace:
CPU: 0 PID: 19684 Comm: syz-executor3 Not tainted 4.17.0-rc2+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
lockdep_rcu_suspicious+0x14a/0x153 kernel/locking/lockdep.c:4592
rcu_preempt_sleep_check include/linux/rcupdate.h:303 [inline]
___might_sleep+0x26d/0x320 kernel/sched/core.c:6153
__might_sleep+0x95/0x190 kernel/sched/core.c:6141
slab_pre_alloc_hook mm/slab.h:421 [inline]
slab_alloc mm/slab.c:3378 [inline]
__do_kmalloc mm/slab.c:3716 [inline]
__kmalloc+0x2b9/0x760 mm/slab.c:3727
kmalloc_array include/linux/slab.h:631 [inline]
kcalloc include/linux/slab.h:642 [inline]
numa_crng_init drivers/char/random.c:798 [inline]
crng_reseed+0x427/0x920 drivers/char/random.c:923
credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708
add_interrupt_randomness+0x494/0x860 drivers/char/random.c:1254
handle_irq_event_percpu+0xf9/0x1c0 kernel/irq/handle.c:191
handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206
handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791
generic_handle_irq_desc include/linux/irqdesc.h:159 [inline]
handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77
do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245
common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:642
RIP: 0010:debug_lockdep_rcu_enabled+0x6e/0x90 kernel/rcu/update.c:300
RSP: 0018:ffff88018ffdf4a0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffffda
RAX: 0000000000000001 RBX: 1ffff10031ffbe9c RCX: ffffffff8171ef0e
RDX: 0000000000000004 RSI: ffffffff8171e89a RDI: ffffffff8909cea0
RBP: ffff88018ffdf4a0 R08: ffff8801b04fa180 R09: ffffed003b5c46c2
R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: ffff8801b34dc380
R13: 0000000000000000 R14: ffff88018ffdf600 R15: ffff8801b34dc380
css_next_child+0x9f/0x600 kernel/cgroup/cgroup.c:3826
css_next_descendant_pre+0x6a/0x190 kernel/cgroup/cgroup.c:3901
mem_cgroup_iter+0x397/0x9d0 mm/memcontrol.c:776
shrink_node+0x398/0x1740 mm/vmscan.c:2584
shrink_zones mm/vmscan.c:2794 [inline]
do_try_to_free_pages+0x3c9/0x1240 mm/vmscan.c:2856
try_to_free_mem_cgroup_pages+0x475/0xc50 mm/vmscan.c:3146
reclaim_high.constprop.67+0x12f/0x1d0 mm/memcontrol.c:1862
mem_cgroup_handle_over_high+0x8d/0x130 mm/memcontrol.c:1887
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x274/0x310 arch/x86/entry/common.c:166
prepare_exit_to_usermode+0x32e/0x390 arch/x86/entry/common.c:196
retint_user+0x8/0x18
RIP: 0023:0x804c3cc
RSP: 002b:000000000844e944 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 000000000813af00 RCX: 0000000000000028
RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 000000000844ea80
RBP: 000000000813af20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
BUG: sleeping function called from invalid context at mm/slab.h:421
in_atomic(): 1, irqs_disabled(): 1, pid: 19684, name: syz-executor3
1 lock held by syz-executor3/19684:
#0: (ptrval) (rcu_read_lock){....}, at: rcu_read_lock+0x0/0x70 include/linux/compiler.h:188
irq event stamp: 564
hardirqs last enabled at (563): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
hardirqs last enabled at (563): [] _raw_spin_unlock_irq+0x27/0x70 kernel/locking/spinlock.c:192
hardirqs last disabled at (564): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625
softirqs last enabled at (478): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311
softirqs last disabled at (471): [] invoke_softirq kernel/softirq.c:365 [inline]
softirqs last disabled at (471): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405
CPU: 0 PID: 19684 Comm: syz-executor3 Not tainted 4.17.0-rc2+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
___might_sleep.cold.87+0x11f/0x13a kernel/sched/core.c:6188
__might_sleep+0x95/0x190 kernel/sched/core.c:6141
slab_pre_alloc_hook mm/slab.h:421 [inline]
slab_alloc mm/slab.c:3378 [inline]
__do_kmalloc mm/slab.c:3716 [inline]
__kmalloc+0x2b9/0x760 mm/slab.c:3727
kmalloc_array include/linux/slab.h:631 [inline]
kcalloc include/linux/slab.h:642 [inline]
numa_crng_init drivers/char/random.c:798 [inline]
crng_reseed+0x427/0x920 drivers/char/random.c:923
credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708
add_interrupt_randomness+0x494/0x860 drivers/char/random.c:1254
handle_irq_event_percpu+0xf9/0x1c0 kernel/irq/handle.c:191
handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206
handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791
generic_handle_irq_desc include/linux/irqdesc.h:159 [inline]
handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77
do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245
common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:642
RIP: 0010:debug_lockdep_rcu_enabled+0x6e/0x90 kernel/rcu/update.c:300
RSP: 0018:ffff88018ffdf4a0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffffda
RAX: 0000000000000001 RBX: 1ffff10031ffbe9c RCX: ffffffff8171ef0e
RDX: 0000000000000004 RSI: ffffffff8171e89a RDI: ffffffff8909cea0
RBP: ffff88018ffdf4a0 R08: ffff8801b04fa180 R09: ffffed003b5c46c2
R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: ffff8801b34dc380
R13: 0000000000000000 R14: ffff88018ffdf600 R15: ffff8801b34dc380
css_next_child+0x9f/0x600 kernel/cgroup/cgroup.c:3826
css_next_descendant_pre+0x6a/0x190 kernel/cgroup/cgroup.c:3901
mem_cgroup_iter+0x397/0x9d0 mm/memcontrol.c:776
shrink_node+0x398/0x1740 mm/vmscan.c:2584
shrink_zones mm/vmscan.c:2794 [inline]
do_try_to_free_pages+0x3c9/0x1240 mm/vmscan.c:2856
try_to_free_mem_cgroup_pages+0x475/0xc50 mm/vmscan.c:3146
reclaim_high.constprop.67+0x12f/0x1d0 mm/memcontrol.c:1862
mem_cgroup_handle_over_high+0x8d/0x130 mm/memcontrol.c:1887
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x274/0x310 arch/x86/entry/common.c:166
prepare_exit_to_usermode+0x32e/0x390 arch/x86/entry/common.c:196
retint_user+0x8/0x18
RIP: 0023:0x804c3cc
RSP: 002b:000000000844e944 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 000000000813af00 RCX: 0000000000000028
RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 000000000844ea80
RBP: 000000000813af20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
random: crng init done
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 19792 Comm: syz-executor1 Tainted: G W 4.17.0-rc2+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold.4+0xa/0x1a lib/fault-inject.c:149
__should_failslab+0x124/0x180 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1522
slab_pre_alloc_hook mm/slab.h:423 [inline]
slab_alloc mm/slab.c:3378 [inline]
kmem_cache_alloc_trace+0x2cb/0x780 mm/slab.c:3618
kmalloc include/linux/slab.h:512 [inline]
kzalloc include/linux/slab.h:701 [inline]
snd_mixer_oss_get_volume1_vol.isra.13+0xa3/0x5d0 sound/core/oss/mixer_oss.c:539
snd_mixer_oss_get_volume1+0x231/0x618 sound/core/oss/mixer_oss.c:608
snd_mixer_oss_get_volume sound/core/oss/mixer_oss.c:272 [inline]
snd_mixer_oss_ioctl1+0x305/0x1ce0 sound/core/oss/mixer_oss.c:372
snd_mixer_oss_ioctl_compat+0x4c/0x70 sound/core/oss/mixer_oss.c:405
__do_compat_sys_ioctl fs/compat_ioctl.c:1461 [inline]
__se_compat_sys_ioctl fs/compat_ioctl.c:1407 [inline]
__ia32_compat_sys_ioctl+0x221/0x640 fs/compat_ioctl.c:1407
do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline]
do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f72cb9
RSP: 002b:00000000f5f6e0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 0000000080045400
RDX: 0000000020000240 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 19869 Comm: syz-executor1 Tainted: G W 4.17.0-rc2+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold.4+0xa/0x1a lib/fault-inject.c:149
__should_failslab+0x124/0x180 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1522
slab_pre_alloc_hook mm/slab.h:423 [inline]
slab_alloc mm/slab.c:3378 [inline]
kmem_cache_alloc_trace+0x2cb/0x780 mm/slab.c:3618
kmalloc include/linux/slab.h:512 [inline]
kzalloc include/linux/slab.h:701 [inline]
snd_mixer_oss_get_volume1_vol.isra.13+0xde/0x5d0 sound/core/oss/mixer_oss.c:540
snd_mixer_oss_get_volume1+0x231/0x618 sound/core/oss/mixer_oss.c:608
snd_mixer_oss_get_volume sound/core/oss/mixer_oss.c:272 [inline]
snd_mixer_oss_ioctl1+0x305/0x1ce0 sound/core/oss/mixer_oss.c:372
snd_mixer_oss_ioctl_compat+0x4c/0x70 sound/core/oss/mixer_oss.c:405
__do_compat_sys_ioctl fs/compat_ioctl.c:1461 [inline]
__se_compat_sys_ioctl fs/compat_ioctl.c:1407 [inline]
__ia32_compat_sys_ioctl+0x221/0x640 fs/compat_ioctl.c:1407
do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline]
do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f72cb9
RSP: 002b:00000000f5f6e0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 0000000080045400
RDX: 0000000020000240 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 20412 Comm: syz-executor0 Tainted: G W 4.17.0-rc2+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold.4+0xa/0x1a lib/fault-inject.c:149
__should_failslab+0x124/0x180 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1522
slab_pre_alloc_hook mm/slab.h:423 [inline]
slab_alloc mm/slab.c:3378 [inline]
kmem_cache_alloc_trace+0x2cb/0x780 mm/slab.c:3618
kmalloc include/linux/slab.h:512 [inline]
kzalloc include/linux/slab.h:701 [inline]
snd_mixer_oss_put_volume1_vol.isra.12+0x9d/0x430 sound/core/oss/mixer_oss.c:642
snd_mixer_oss_put_volume1+0x95c/0xd60 sound/core/oss/mixer_oss.c:723
snd_mixer_oss_set_volume sound/core/oss/mixer_oss.c:304 [inline]
snd_mixer_oss_ioctl1+0x6c7/0x1ce0 sound/core/oss/mixer_oss.c:367
snd_mixer_oss_ioctl_compat+0x4c/0x70 sound/core/oss/mixer_oss.c:405
__do_compat_sys_ioctl fs/compat_ioctl.c:1461 [inline]
__se_compat_sys_ioctl fs/compat_ioctl.c:1407 [inline]
__ia32_compat_sys_ioctl+0x221/0x640 fs/compat_ioctl.c:1407
do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline]
do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7ff6cb9
RSP: 002b:00000000f5ff20ac EFLAGS: 00000282 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 00000000c020aa00
RDX: 0000000020000140 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 20437 Comm: syz-executor0 Tainted: G W 4.17.0-rc2+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold.4+0xa/0x1a lib/fault-inject.c:149
__should_failslab+0x124/0x180 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1522
slab_pre_alloc_hook mm/slab.h:423 [inline]
slab_alloc mm/slab.c:3378 [inline]
kmem_cache_alloc_trace+0x2cb/0x780 mm/slab.c:3618
kmalloc include/linux/slab.h:512 [inline]
kzalloc include/linux/slab.h:701 [inline]
snd_mixer_oss_put_volume1_vol.isra.12+0xd8/0x430 sound/core/oss/mixer_oss.c:643
snd_mixer_oss_put_volume1+0x95c/0xd60 sound/core/oss/mixer_oss.c:723
snd_mixer_oss_set_volume sound/core/oss/mixer_oss.c:304 [inline]
snd_mixer_oss_ioctl1+0x6c7/0x1ce0 sound/core/oss/mixer_oss.c:367
snd_mixer_oss_ioctl_compat+0x4c/0x70 sound/core/oss/mixer_oss.c:405
__do_compat_sys_ioctl fs/compat_ioctl.c:1461 [inline]
__se_compat_sys_ioctl fs/compat_ioctl.c:1407 [inline]
__ia32_compat_sys_ioctl+0x221/0x640 fs/compat_ioctl.c:1407
do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline]
do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7ff6cb9
RSP: 002b:00000000f5ff20ac EFLAGS: 00000282 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 00000000c020aa00
RDX: 0000000020000140 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 20511 Comm: syz-executor0 Tainted: G W 4.17.0-rc2+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold.4+0xa/0x1a lib/fault-inject.c:149
__should_failslab+0x124/0x180 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1522
slab_pre_alloc_hook mm/slab.h:423 [inline]
slab_alloc mm/slab.c:3378 [inline]
kmem_cache_alloc_trace+0x2cb/0x780 mm/slab.c:3618
kmalloc include/linux/slab.h:512 [inline]
kzalloc include/linux/slab.h:701 [inline]
snd_mixer_oss_put_volume1_sw.isra.10+0xa1/0x430 sound/core/oss/mixer_oss.c:683
snd_mixer_oss_put_volume1+0x6c6/0xd60 sound/core/oss/mixer_oss.c:731
snd_mixer_oss_set_volume sound/core/oss/mixer_oss.c:304 [inline]
snd_mixer_oss_ioctl1+0x6c7/0x1ce0 sound/core/oss/mixer_oss.c:367
snd_mixer_oss_ioctl_compat+0x4c/0x70 sound/core/oss/mixer_oss.c:405
__do_compat_sys_ioctl fs/compat_ioctl.c:1461 [inline]
__se_compat_sys_ioctl fs/compat_ioctl.c:1407 [inline]
__ia32_compat_sys_ioctl+0x221/0x640 fs/compat_ioctl.c:1407
do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline]
do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7ff6cb9
RSP: 002b:00000000f5ff20ac EFLAGS: 00000282 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 00000000c020aa00
RDX: 0000000020000140 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 20553 Comm: syz-executor0 Tainted: G W 4.17.0-rc2+ #42
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold.4+0xa/0x1a lib/fault-inject.c:149
__should_failslab+0x124/0x180 mm/failslab.c:32
should_failslab+0x9/0x14 mm/slab_common.c:1522
slab_pre_alloc_hook mm/slab.h:423 [inline]
slab_alloc mm/slab.c:3378 [inline]
kmem_cache_alloc_trace+0x2cb/0x780 mm/slab.c:3618
kmalloc include/linux/slab.h:512 [inline]
kzalloc include/linux/slab.h:701 [inline]
snd_mixer_oss_put_volume1_sw.isra.10+0xdc/0x430 sound/core/oss/mixer_oss.c:684