rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10300 ticks this GP) idle=545c/1/0x4000000000000000 softirq=14165/14170 fqs=3533
rcu: hardirqs softirqs csw/system
rcu: number: 1596052 67 0
rcu: cputime: 15429 37049 36 ==> 52480(ms)
rcu: (t=10500 jiffies g=11393 q=3093 ncpus=2)
CPU: 0 PID: 5994 Comm: syz.0.21 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:178 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x2e/0x60 kernel/kcov.c:212
Code: 48 8b 04 24 65 48 8b 0d a0 2c 7c 7e 65 8b 15 a1 2c 7c 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 24 16 00 00 00 <74> 2c 8b 91 00 16 00 00 83 fa 02 75 21 48 8b 91 08 16 00 00 48 8b
RSP: 0018:ffffc900000064a0 EFLAGS: 00000246
RAX: ffffffff813be0d7 RBX: 1ffff92000000cb9 RCX: ffff88802c640000
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900034afec0 R08: ffff88802c640000 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc900034b0000
R13: 1ffff92000000cbb R14: ffffc900034a8000 R15: ffffc900000065c8
FS: 0000555563f40500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000034f4bf7dc000 CR3: 0000000074925000 CR4: 00000000003506f0
Call Trace:
stack_access_ok arch/x86/kernel/unwind_orc.c:393 [inline]
deref_stack_reg+0xb7/0x230 arch/x86/kernel/unwind_orc.c:403
unwind_next_frame+0x1781/0x2990 arch/x86/kernel/unwind_orc.c:648
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
kmem_cache_free+0xf8/0x290 mm/slub.c:3852
skb_ext_del include/linux/skbuff.h:4830 [inline]
nf_bridge_info_free net/bridge/br_netfilter_hooks.c:152 [inline]
br_nf_dev_queue_xmit+0x5ec/0x1af0 net/bridge/br_netfilter_hooks.c:874
NF_HOOK+0x66e/0x700 include/linux/netfilter.h:304
br_nf_post_routing+0xa3b/0xec0 net/bridge/br_netfilter_hooks.c:981
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:259 [inline]
NF_HOOK+0x23e/0x3e0 include/linux/netfilter.h:302
br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:66
br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1188 [inline]
br_nf_forward_finish+0xa69/0xe90 net/bridge/br_netfilter_hooks.c:688
NF_HOOK+0x66e/0x700 include/linux/netfilter.h:304
br_nf_forward_ip+0xc78/0x10d0 net/bridge/br_netfilter_hooks.c:758
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:259 [inline]
NF_HOOK+0x23e/0x3e0 include/linux/netfilter.h:302
__br_forward+0x433/0x610 net/bridge/br_forward.c:115
br_handle_frame_finish+0xf2d/0x15c0 net/bridge/br_input.c:215
br_nf_hook_thresh+0x3cd/0x4a0 net/bridge/br_netfilter_hooks.c:1188
br_nf_pre_routing_finish_ipv6+0x9e5/0xd20 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:304 [inline]
br_nf_pre_routing_ipv6+0x34d/0x6a0 net/bridge/br_netfilter_ipv6.c:184
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x1240/0x14d0 net/bridge/br_input.c:424
__netif_receive_skb_core+0xf94/0x3ac0 net/core/dev.c:5564
__netif_receive_skb_one_core net/core/dev.c:5668 [inline]
__netif_receive_skb+0x74/0x290 net/core/dev.c:5784
process_backlog+0x380/0x710 net/core/dev.c:6112
__napi_poll+0xbb/0x460 net/core/dev.c:6674
napi_poll net/core/dev.c:6741 [inline]
net_rx_action+0x65f/0xcc0 net/core/dev.c:6877
handle_softirqs+0x27d/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:finish_task_switch+0x267/0x8f0 kernel/sched/core.c:5256
Code: 33 09 85 c0 0f 84 30 01 00 00 48 85 db 0f 85 4f 01 00 00 0f 1f 44 00 00 4c 89 e7 e8 53 28 3d 09 e8 0e 23 30 00 fb 4c 8b 65 b8 <49> 8d bc 24 00 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc900034af500 EFLAGS: 00000286
RAX: 12c1464e663d8000 RBX: 0000000000000000 RCX: 12c1464e663d8000
RDX: dffffc0000000000 RSI: ffffffff8acacce0 RDI: ffffffff8b1d3ba0
RBP: ffffc900034af550 R08: ffffffff911eb537 R09: 1ffffffff223d6a6
R10: dffffc0000000000 R11: fffffbfff223d6a7 R12: ffff88802c640000
R13: 1ffff110171c79a1 R14: dffffc0000000000 R15: ffff8880b8e3cd08
context_switch kernel/sched/core.c:5385 [inline]
__schedule+0x15b6/0x4660 kernel/sched/core.c:6701
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011
irqentry_exit+0x67/0x70 kernel/entry/common.c:441
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:mas_is_none include/linux/maple_tree.h:507 [inline]
RIP: 0010:mas_state_walk lib/maple_tree.c:3708 [inline]
RIP: 0010:mas_walk lib/maple_tree.c:4890 [inline]
RIP: 0010:mas_find_setup+0x239/0x590 lib/maple_tree.c:5965
Code: 00 00 4c 89 2c 24 49 89 ed 41 80 3c 2e 00 74 08 4c 89 ff e8 99 b1 61 f7 49 c7 07 01 00 00 00 48 89 df e8 7a 4e ff ff 48 89 c5 <43> 80 3c 2e 00 74 08 4c 89 ff e8 d8 b0 61 f7 4d 8b 27 4c 89 e7 48
RSP: 0018:ffffc900034af8e8 EFLAGS: 00000292
RAX: 0000000000000000 RBX: ffffc900034afa00 RCX: ffff88802c640000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffff88802c640000 R09: 0000000000000004
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff92000695f43 R15: ffffc900034afa18
mas_find+0x3a/0x90 lib/maple_tree.c:6006
vma_next include/linux/mm.h:967 [inline]
acct_collect+0x1a2/0x780 kernel/acct.c:599
do_exit+0x88f/0x2530 kernel/exit.c:860
do_group_exit+0x22d/0x2f0 kernel/exit.c:1032
get_signal+0x12a6/0x1390 kernel/signal.c:2915
arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213
__syscall_exit_to_user_mode_work kernel/entry/common.c:294 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:305
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd86a39e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd9d5789c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000004 RBX: 00007fd86a625fa0 RCX: 00007fd86a39e159
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000008c0
RBP: 00007fd86a43506b R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd86a625fac R14: 00007fd86a625fa0 R15: 00007fd86a625fa0