rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8256/1:b..l P8261/1:b..l P8254/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=25181, q=3173 ncpus=2)
task:syz.2.645 state:R running task stack:26960 pid:8254 tgid:8252 ppid:5617 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x17db/0x58f0 kernel/sched/core.c:7284
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7606
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x920 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline]
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:103 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline]
RIP: 0010:unwind_next_frame+0x4f4/0x2550 arch/x86/kernel/unwind_orc.c:510
Code: 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 49 8d 1c 47 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 48 63 03 48 01 d8 48 8d 4b 04 48 39 e8 4c 0f 46 f9 48
RSP: 0018:ffffc900051272c0 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffffffff919ca3c0 RCX: dffffc0000000000
RDX: ffffffff919ca3b0 RSI: ffffffff921ff10e RDI: ffffffff8c6ddb20
RBP: ffffffff822d5620 R08: 0000000000000009 R09: 0000000000000000
R10: ffffc900051273b8 R11: ffffffff81b2c5e0 R12: ffffffff919ca3d0
R13: ffffffff919ca3b0 R14: ffffc90005127368 R15: ffffffff919ca3b0
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:409 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:426
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_node_noprof+0x3d1/0x620 mm/slub.c:5582
_kmalloc_node_noprof include/linux/slab.h:1196 [inline]
__get_vm_area_node+0x155/0x2f0 mm/vmalloc.c:3237
__vmalloc_node_range_noprof+0x343/0x1540 mm/vmalloc.c:4064
__vmalloc_node_noprof mm/vmalloc.c:4165 [inline]
__vmalloc_noprof+0xd2/0x120 mm/vmalloc.c:4181
bpf_prog_alloc_no_stats+0x47/0x560 kernel/bpf/core.c:108
bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:158
bpf_prog_load+0x7f8/0x1c20 kernel/bpf/syscall.c:3059
__sys_bpf+0xd0d/0xd90 kernel/bpf/syscall.c:6387
__do_sys_bpf kernel/bpf/syscall.c:6506 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6503 [inline]
__x64_sys_bpf+0xba/0xd0 kernel/bpf/syscall.c:6503
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8ffb39e559
RSP: 002b:00007f8ffc2a1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8ffb625fa0 RCX: 00007f8ffb39e559
RDX: 0000000000000094 RSI: 0000200000001040 RDI: 0000000000000005
RBP: 00007f8ffb435ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8ffb626038 R14: 00007f8ffb625fa0 R15: 00007ffe95841d48
task:syz.2.645 state:R running task stack:25560 pid:8261 tgid:8252 ppid:5617 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x17db/0x58f0 kernel/sched/core.c:7284
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7606
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x920 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 30 5d 45 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 42 a7 f2 12 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d f7 44 da
RSP: 0018:ffffc900050bf690 EFLAGS: 00000296
RAX: 257e57a8a0e5bd00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000105209fd RSI: ffffffff8e6f1e7e RDI: ffffffff8c6ddb80
RBP: ffff888027cd0000 R08: ffffffff82418072 R09: 0000000000000000
R10: ffff8880765d8eb0 R11: ffffffff81b2c5e0 R12: ffffffff8fd5c8e0
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
get_mem_cgroup_from_objcg include/linux/memcontrol.h:493 [inline]
__memcg_slab_post_alloc_hook+0x223/0xd90 mm/memcontrol.c:3631
memcg_slab_post_alloc_hook mm/slub.c:2517 [inline]
slab_post_alloc_hook mm/slub.c:4702 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
kmem_cache_alloc_lru_noprof+0x351/0x5f0 mm/slub.c:5029
__d_alloc+0x37/0x6f0 fs/dcache.c:1909
d_alloc_pseudo+0x21/0xc0 fs/dcache.c:2044
alloc_path_pseudo+0x107/0x220 fs/file_table.c:407
alloc_file_pseudo+0xa8/0x1e0 fs/file_table.c:423
__anon_inode_getfile fs/anon_inodes.c:164 [inline]
__anon_inode_getfd fs/anon_inodes.c:281 [inline]
anon_inode_getfd+0xc8/0x1f0 fs/anon_inodes.c:305
bpf_prog_load+0x1612/0x1c20 kernel/bpf/syscall.c:3180
__sys_bpf+0xd0d/0xd90 kernel/bpf/syscall.c:6387
__do_sys_bpf kernel/bpf/syscall.c:6506 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6503 [inline]
__x64_sys_bpf+0xba/0xd0 kernel/bpf/syscall.c:6503
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8ffb39e559
RSP: 002b:00007f8ffc25f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8ffb626180 RCX: 00007f8ffb39e559
RDX: 0000000000000094 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007f8ffb435ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8ffb626218 R14: 00007f8ffb626180 R15: 00007ffe95841d48
task:syz.2.645 state:R running task stack:27480 pid:8256 tgid:8252 ppid:5617 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x17db/0x58f0 kernel/sched/core.c:7284
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7606
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x920 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline]
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:103 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline]
RIP: 0010:unwind_next_frame+0x4f4/0x2550 arch/x86/kernel/unwind_orc.c:510
Code: 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 49 8d 1c 47 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 48 63 03 48 01 d8 48 8d 4b 04 48 39 e8 4c 0f 46 f9 48
RSP: 0018:ffffc900051a72c0 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: ffffffff919c5004 RCX: dffffc0000000000
RDX: ffffffff919c4fcc RSI: ffffffff921f7338 RDI: ffffffff8c6ddb20
RBP: ffffffff822756f1 R08: 0000000000000013 R09: 0000000000000000
R10: ffffc900051a73b8 R11: ffffffff81b2c5e0 R12: ffffffff919c5014
R13: ffffffff919c4ff0 R14: ffffc900051a7368 R15: ffffffff919c4ff4
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:409 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:426
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_node_noprof+0x3d1/0x620 mm/slub.c:5582
_kmalloc_node_noprof include/linux/slab.h:1196 [inline]
__get_vm_area_node+0x155/0x2f0 mm/vmalloc.c:3237
__vmalloc_node_range_noprof+0x343/0x1540 mm/vmalloc.c:4064
__vmalloc_node_noprof mm/vmalloc.c:4165 [inline]
__vmalloc_noprof+0xd2/0x120 mm/vmalloc.c:4181
bpf_prog_alloc_no_stats+0x47/0x560 kernel/bpf/core.c:108
bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:158
bpf_prog_load+0x7f8/0x1c20 kernel/bpf/syscall.c:3059
__sys_bpf+0xd0d/0xd90 kernel/bpf/syscall.c:6387
__do_sys_bpf kernel/bpf/syscall.c:6506 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6503 [inline]
__x64_sys_bpf+0xba/0xd0 kernel/bpf/syscall.c:6503
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8ffb39e559
RSP: 002b:00007f8ffc280028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8ffb626090 RCX: 00007f8ffb39e559
RDX: 0000000000000090 RSI: 0000200000000d40 RDI: 0000000000000005
RBP: 00007f8ffb435ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8ffb626128 R14: 00007f8ffb626090 R15: 00007ffe95841d48
rcu: rcu_preempt kthread starved for 359 jiffies! g25181 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->cpu=0
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:27496 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x17db/0x58f0 kernel/sched/core.c:7284
__schedule_loop kernel/sched/core.c:7361 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7376
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2330
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 2234 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:__find_rr_leaf+0x121/0x740 net/ipv6/route.c:843
Code: 80 f2 a0 8f 48 c1 e8 03 48 89 44 24 70 4c 89 7c 24 38 4d 85 ff 74 4e 49 8d 9e 90 00 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 <84> c0 75 21 8b 1b 89 df 44 8b 64 24 4c 44 89 e6 e8 8a 9c 33 f7 44
RSP: 0018:ffffc90000006960 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffff88805624e490 RCX: ffff88802d323e80
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffffc90000006ab8 R08: 0000000000000100 R09: ffffc90000006bf0
R10: ffffc90000006a40 R11: fffff52000000d4a R12: 1ffff1100ac4758c
R13: dffffc0000000000 R14: ffff88805624e400 R15: ffffc90000006bb8
FS: 0000000000000000(0000) GS:ffff888123abf000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fba00a00218 CR3: 000000007b026000 CR4: 00000000003526f0
Call Trace:
find_rr_leaf net/ipv6/route.c:894 [inline]
rt6_select net/ipv6/route.c:938 [inline]
fib6_table_lookup+0x3c6/0xae0 net/ipv6/route.c:2261
ip6_pol_route+0x229/0x14d0 net/ipv6/route.c:2298
pol_lookup_func include/net/ip6_fib.h:672 [inline]
fib6_rule_lookup+0x512/0x6e0 net/ipv6/fib6_rules.c:123
ip6_route_input_lookup net/ipv6/route.c:2369 [inline]
ip6_route_input+0x78d/0xb20 net/ipv6/route.c:2672
ip6_rcv_finish+0x141/0x280 net/ipv6/ip6_input.c:117
ip_sabotage_in+0x1e1/0x270 net/bridge/br_netfilter_hooks.c:988
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:323
__netif_receive_skb_one_core net/core/dev.c:6297 [inline]
__netif_receive_skb net/core/dev.c:6410 [inline]
netif_receive_skb_internal net/core/dev.c:6496 [inline]
netif_receive_skb+0x278/0xbf0 net/core/dev.c:6555
NF_HOOK+0xa4/0x3a0 include/linux/netfilter.h:325
br_handle_frame_finish+0x1136/0x1950 net/bridge/br_input.c:-1
br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1
br_nf_pre_routing_finish_ipv6+0x90c/0xc40 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:325 [inline]
br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0x1329/0x1600 net/bridge/br_input.c:451
__netif_receive_skb_core+0x989/0x30c0 net/core/dev.c:6184
__netif_receive_skb_one_core net/core/dev.c:6295 [inline]
__netif_receive_skb net/core/dev.c:6410 [inline]
process_backlog+0x727/0x18b0 net/core/dev.c:6761
__napi_poll+0xaa/0x330 net/core/dev.c:7830
napi_poll net/core/dev.c:7893 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8050
handle_softirqs+0x226/0x860 kernel/softirq.c:645
do_softirq+0x77/0xd0 kernel/softirq.c:546
__local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_local_purge+0x2c1/0x340 net/batman-adv/translation-table.c:1402
batadv_tt_purge+0x35/0xa10 net/batman-adv/translation-table.c:3753
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245