rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5842/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=8205, q=715 ncpus=2)
task:syz-executor state:R running task stack:22592 pid:5842 tgid:5842 ppid:1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6690
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7012
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_get_return_address+0x6e/0xa0 arch/x86/kernel/unwind_orc.c:369
Code: 89 ea 48 c1 ea 03 80 3c 02 00 75 36 48 8b 7b 48 e8 d7 31 1b 00 85 c0 74 cf 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 1c 48 8b 43 48 5b 5d c3 cc cc cc cc e8 9c bc b1 00
RSP: 0018:ffffc9000353f660 EFLAGS: 00000a06
RAX: dffffc0000000000 RBX: ffffc9000353f678 RCX: 0000000000000000
RDX: 1ffff920006a7ed8 RSI: 0000000000000001 RDI: ffffffff81f8a8f2
RBP: ffffc9000353f6c0 R08: ffffc9000353f6ac R09: ffffffff90f5c796
R10: ffffc9000353f678 R11: 0000000000007949 R12: ffffffff817946c0
R13: ffffc9000353f738 R14: 0000000000000000 R15: ffff888026520000
arch_stack_walk+0xa7/0x100 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1108 [inline]
free_unref_page+0x5f4/0xdc0 mm/page_alloc.c:2638
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:247 [inline]
slab_post_alloc_hook mm/slub.c:4085 [inline]
slab_alloc_node mm/slub.c:4134 [inline]
__do_kmalloc_node mm/slub.c:4263 [inline]
__kmalloc_noprof+0x199/0x400 mm/slub.c:4276
kmalloc_noprof include/linux/slab.h:882 [inline]
tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x273/0x450 security/tomoyo/file.c:822
security_inode_getattr+0x116/0x290 security/security.c:2373
vfs_getattr fs/stat.c:204 [inline]
vfs_fstat+0x53/0xd0 fs/stat.c:229
vfs_fstatat+0x146/0x160 fs/stat.c:338
__do_sys_newfstatat+0xa2/0x130 fs/stat.c:505
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e8a17cf2a
RSP: 002b:00007ffc2104fce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6e8a17cf2a
RDX: 00007ffc2104fcf0 RSI: 00007f6e8a227302 RDI: 0000000000000003
RBP: 00007ffc2104fcf0 R08: 0000000000000000 R09: 00007f6e89ffa080
R10: 0000000000001000 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000002501b R14: 0000000000024745 R15: 00007ffc2104fe30
rcu: rcu_preempt kthread starved for 8336 jiffies! g8205 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:25904 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5740 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6782
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2615
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.12.0-rc6-syzkaller-00099-g7758b206117d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xc/0x70 kernel/kcov.c:217
Code: cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 64 60 76 7e <65> 8b 05 65 60 76 7e a9 00 01 ff 00 48 8b 34 24 74 1d f6 c4 01 74
RSP: 0018:ffffc90000157510 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff88815837f500 RCX: ffffffff89f95bf3
RDX: ffff88801d2e8000 RSI: 0000000000000027 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000027
R10: 0000000000000038 R11: 0000000000000000 R12: 0000000000000038
R13: 1ffff9200002aea5 R14: ffff88815837f570 R15: 0000000000000038
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff926c9fc0 CR3: 00000000311c4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
skb_network_header include/linux/skbuff.h:3003 [inline]
ipv6_hdr include/linux/ipv6.h:109 [inline]
br_validate_ipv6+0x172/0x730 net/bridge/br_netfilter_ipv6.c:56
br_nf_pre_routing_ipv6+0xa7/0x8c0 net/bridge/br_netfilter_ipv6.c:169
br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:533
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x9eb/0x1490 net/bridge/br_input.c:424
__netif_receive_skb_core.constprop.0+0xa3d/0x4330 net/core/dev.c:5564
__netif_receive_skb_one_core+0xb1/0x1e0 net/core/dev.c:5668
__netif_receive_skb+0x1d/0x160 net/core/dev.c:5783
process_backlog+0x443/0x15f0 net/core/dev.c:6115
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6779
napi_poll net/core/dev.c:6848 [inline]
net_rx_action+0xa92/0x1010 net/core/dev.c:6970
handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
run_ksoftirqd kernel/softirq.c:927 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:919
smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
net_ratelimit: 20921 callbacks suppressed
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:a2:15:a7:3e:34:7e, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:a2:15:a7:3e:34:7e, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
net_ratelimit: 20877 callbacks suppressed
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:a2:15:a7:3e:34:7e, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:a2:15:a7:3e:34:7e, vlan:0)