rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P16192/1:b..l P16215/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=84165, q=738 ncpus=2)
task:syz-executor state:R running task stack:24104 pid:16215 tgid:16215 ppid:5846 task_flags:0x400000 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288
irqentry_exit+0x6f/0x90 kernel/entry/common.c:197
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_next_frame+0x1183/0x2390 arch/x86/kernel/unwind_orc.c:641
Code: 85 f9 0f 00 00 c6 03 00 4c 8b 64 24 10 4c 8b 7c 24 28 48 8b 44 24 40 0f b6 04 28 84 c0 0f 85 8a 0d 00 00 41 0f b6 04 2f 84 c0 <0f> 85 a1 0d 00 00 0f b7 32 c1 ee 04 83 e6 0f 83 fe 04 0f 84 c7 05
RSP: 0018:ffffc9000af5f418 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9000af5f520 RCX: 0000000000000000
RDX: ffffffff903f7de2 RSI: 0000000000000000 RDI: ffffc9000af5f548
RBP: dffffc0000000000 R08: ffffc9000af5f547 R09: ffffc9000af5f538
R10: dffffc0000000000 R11: fffff520015ebea9 R12: ffffc9000af5fbd8
R13: ffffc9000af5f538 R14: ffffc9000af5f4e8 R15: 1ffffffff207efbc
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf5/0x1f0 mm/page_owner.c:156
__set_page_owner+0x8d/0x4a0 mm/page_owner.c:329
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline]
alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507
vm_area_alloc_pages mm/vmalloc.c:3642 [inline]
__vmalloc_area_node mm/vmalloc.c:3720 [inline]
__vmalloc_node_range_noprof+0x97d/0x12f0 mm/vmalloc.c:3893
vmalloc_user_noprof+0xad/0xf0 mm/vmalloc.c:4046
kcov_ioctl+0x55/0x640 kernel/kcov.c:716
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:598 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f961ad8e7eb
RSP: 002b:00007ffda2877550 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000080000 RCX: 00007f961ad8e7eb
RDX: 0000000000080000 RSI: ffffffff80086301 RDI: 00000000000000df
RBP: 00007f961afb66c8 R08: 00000000000000da R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
task:syz.5.1999 state:R running task stack:25288 pid:16192 tgid:16188 ppid:15581 task_flags:0x40044c flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288
irqentry_exit+0x6f/0x90 kernel/entry/common.c:197
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x2b5/0x3e0 kernel/locking/lockdep.c:5893
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 db e1 02 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90004ce7270 EFLAGS: 00000206
RAX: fdf10759819ee800 RBX: 0000000000000202 RCX: fdf10759819ee800
RDX: 0000000000000001 RSI: ffffffff8dba6c8e RDI: ffffffff8be33680
RBP: ffff88802471a918 R08: ffffc90004ce7a10 R09: ffffc90004ce73f8
R10: dffffc0000000000 R11: fffff5200099ce81 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff8e139ee0 R15: ffff888024719e00
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:388 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4396
kmalloc_noprof include/linux/slab.h:905 [inline]
slab_free_hook mm/slub.c:2369 [inline]
slab_free mm/slub.c:4680 [inline]
kmem_cache_free+0x166/0x400 mm/slub.c:4782
exit_mmap+0x53f/0xb50 mm/mmap.c:1305
__mmput+0x118/0x420 kernel/fork.c:1130
exit_mm+0x1da/0x2c0 kernel/exit.c:582
do_exit+0x648/0x2300 kernel/exit.c:949
do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
get_signal+0x1286/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcb7c78ebe9
RSP: 002b:00007fcb7d51e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: fffffffffffffe00 RBX: 00007fcb7c9b6090 RCX: 00007fcb7c78ebe9
RDX: 0000000000000008 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007fcb7c811e19 R08: 0000000000000f3a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcb7c9b6128 R14: 00007fcb7c9b6090 R15: 00007ffff4d88a68