rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 1, t=10502 jiffies, g=231049, q=1013)
rcu: All QSes seen, last rcu_preempt kthread activity 10493 (4295290224-4295279731), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10493 jiffies! g231049 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:26576 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1955
rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2128
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 18818 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation+0x1ff/0x270 kernel/rcu/tree_stall.h:481
print_other_cpu_stall kernel/rcu/tree_stall.h:586 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq+0x23d5/0x2bc0 kernel/rcu/tree.c:2597
update_process_times+0x197/0x200 kernel/time/timer.c:1785
tick_sched_handle kernel/time/tick-sched.c:226 [inline]
tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:memset_erms+0xb/0x10
Code: 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3 aa <4c> 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 01 01
RSP: 0018:ffffc90000dc0938 EFLAGS: 00000202
RAX: ffffffff85b4c600 RBX: ffffc90000dc0a80 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc90000dc0a90
RBP: ffffc90000dc0ae8 R08: dffffc0000000000 R09: ffffc90000dc0a80
R10: fffff520001b8152 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff920001b8151 R14: ffff8880966d3578 R15: ffff88801f4f32e0
mac80211_hwsim_tx_frame_no_nl+0x70f/0x1770 drivers/net/wireless/mac80211_hwsim.c:1519
mac80211_hwsim_tx_frame+0x1cb/0x220 drivers/net/wireless/mac80211_hwsim.c:1784
mac80211_hwsim_beacon_tx+0x46c/0x890 drivers/net/wireless/mac80211_hwsim.c:1838
__iterate_interfaces+0x23e/0x480 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0x9b/0x120 net/mac80211/util.c:829
mac80211_hwsim_beacon+0x9f/0x180 drivers/net/wireless/mac80211_hwsim.c:1861
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x1b7/0x5d0 kernel/time/hrtimer.c:1766
__do_softirq+0x392/0x7a3 kernel/softirq.c:558
__irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:put_cpu_partial+0x147/0x180 mm/slub.c:2602
Code: 00 00 48 3b 44 24 08 75 4d 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 76 a9 31 08 41 f7 c5 00 02 00 00 74 c3 fb 4d 85 ff <75> c2 eb cb 48 c7 c7 c0 5f bf 8c 48 89 de e8 76 fe 68 02 e9 fd fe
RSP: 0018:ffffc90017f17180 EFLAGS: 00000246
RAX: ba98d9178981f100 RBX: 0000000000000001 RCX: ffffffff81663561
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880b9b3cfc0 R08: dffffc0000000000 R09: fffffbfff1feebf0
R10: fffffbfff1feebf0 R11: 0000000000000000 R12: ffff888011441640
R13: 0000000000000282 R14: ffffea00027aecc0 R15: 0000000000000000
do_slab_free mm/slub.c:3501 [inline]
___cache_free+0xe6/0x120 mm/slub.c:3520
qlist_free_all mm/kasan/quarantine.c:165 [inline]
kasan_quarantine_reduce+0x151/0x1c0 mm/kasan/quarantine.c:272
__kasan_slab_alloc+0x2f/0xf0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:259 [inline]
slab_post_alloc_hook mm/slab.h:519 [inline]
slab_alloc_node mm/slub.c:3234 [inline]
slab_alloc mm/slub.c:3242 [inline]
__kmalloc+0x1ed/0x380 mm/slub.c:4419
kmalloc_array include/linux/slab.h:630 [inline]
kcalloc+0x32/0x50 include/linux/slab.h:661
ext4_find_extent+0x23d/0xcc0 fs/ext4/extents.c:865
ext4_ext_map_blocks+0x220/0x7220 fs/ext4/extents.c:4066
ext4_map_blocks+0x2f5/0x1cc0 fs/ext4/inode.c:562
ext4_getblk+0x19c/0x700 fs/ext4/inode.c:847
ext4_bread+0x2a/0x170 fs/ext4/inode.c:900
ext4_append+0x1a6/0x370 fs/ext4/namei.c:67
ext4_init_new_dir+0x337/0xa10 fs/ext4/namei.c:2893
ext4_mkdir+0x4b8/0xc00 fs/ext4/namei.c:2939
vfs_mkdir+0x44d/0x680 fs/namei.c:3883
do_mkdirat+0x277/0x530 fs/namei.c:3909
__do_sys_mkdir fs/namei.c:3929 [inline]
__se_sys_mkdir fs/namei.c:3927 [inline]
__x64_sys_mkdir+0x6a/0x80 fs/namei.c:3927
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f5e8e083bf7
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5e8b5f9fa8 EFLAGS: 00000213 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f5e8e083bf7
RDX: 0000000000000004 RSI: 00000000000001ff RDI: 0000000020000100
RBP: 00007f5e8b5fa040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000213 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f5e8b5fa000 R15: 00000000200000c0
----------------
Code disassembly (best guess):
0: 03 40 0f add 0xf(%rax),%eax
3: b6 f6 mov $0xf6,%dh
5: 48 b8 01 01 01 01 01 movabs $0x101010101010101,%rax
c: 01 01 01
f: 48 0f af c6 imul %rsi,%rax
13: f3 48 ab rep stos %rax,%es:(%rdi)
16: 89 d1 mov %edx,%ecx
18: f3 aa rep stos %al,%es:(%rdi)
1a: 4c 89 c8 mov %r9,%rax
1d: c3 retq
1e: 90 nop
1f: 49 89 f9 mov %rdi,%r9
22: 40 88 f0 mov %sil,%al
25: 48 89 d1 mov %rdx,%rcx
28: f3 aa rep stos %al,%es:(%rdi)
* 2a: 4c 89 c8 mov %r9,%rax <-- trapping instruction
2d: c3 retq
2e: 90 nop
2f: 49 89 fa mov %rdi,%r10
32: 40 0f b6 ce movzbl %sil,%ecx
36: 48 b8 01 01 01 01 01 movabs $0x101010101010101,%rax
3d: 01 01 01