bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:28:ed:50:57:31, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6092/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=7609, q=1670 ncpus=2)
task:syz.1.50 state:R running task stack:26280 pid:6092 tgid:6091 ppid:5817 task_flags:0x40054c flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6947
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1761 [inline]
zap_pmd_range mm/memory.c:1823 [inline]
zap_pud_range mm/memory.c:1852 [inline]
zap_p4d_range mm/memory.c:1873 [inline]
unmap_page_range+0xf08/0x4320 mm/memory.c:1894
unmap_single_vma+0x194/0x2a0 mm/memory.c:1940
unmap_vmas+0x22c/0x490 mm/memory.c:1984
exit_mmap+0x1b9/0xb90 mm/mmap.c:1284
__mmput+0x12a/0x410 kernel/fork.c:1379
mmput+0x62/0x70 kernel/fork.c:1401
exit_mm kernel/exit.c:589 [inline]
do_exit+0x9d1/0x2c30 kernel/exit.c:940
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
get_signal+0x2673/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f334b58d169
RSP: 002b:00007f334c4d3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: 000000000000000b RBX: 00007f334b7a5fa0 RCX: 00007f334b58d169
RDX: 0000000000000651 RSI: 0000200000000000 RDI: 0000000000000009
RBP: 00007f334b60e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f334b7a5fa0 R15: 00007ffc712cf888
rcu: rcu_preempt kthread starved for 2673 jiffies! g7609 f0x0 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:28728 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2046
rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2248
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5158 Comm: kworker/R-ext4- Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work
RIP: 0010:get_stack_info+0x55/0xa0 arch/x86/kernel/dumpstack_64.c:213
Code: e8 f0 9b 14 0a 84 c0 74 5e 4d 85 ed 74 20 44 8b 65 00 41 83 fc 3f 0f 87 a1 d7 c2 ff 49 8b 45 00 4c 0f a3 e0 72 15 4c 0f ab e0 <49> 89 45 00 31 c0 5b 5d 41 5c 41 5d c3 cc cc cc cc 65 48 8b 05 fa
RSP: 0018:ffffc90000a07ef0 EFLAGS: 00000296
RAX: 0000000000000004 RBX: ffff88807a404880 RCX: ffffc90000a09000
RDX: ffffc90000a01000 RSI: ffffffff8dbeeb5e RDI: ffffffff8bf46500
RBP: ffffc90000a07f68 R08: 0000000000000001 R09: 0000000000000000
R10: ffffc90000a07f68 R11: 0000000000000000 R12: 0000000000000002
R13: ffffc90000a07f88 R14: ffffc90000a07f68 R15: ffffc90000a07f90
FS: 0000000000000000(0000) GS:ffff888124ab3000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556443d5c8 CR3: 00000000794f2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__unwind_start+0x3f6/0x7f0 arch/x86/kernel/unwind_orc.c:727
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x73/0x100 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4151 [inline]
slab_alloc_node mm/slub.c:4200 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4207
skb_clone+0x190/0x3f0 net/core/skbuff.c:2056
deliver_clone net/bridge/br_forward.c:125 [inline]
br_flood+0x37c/0x650 net/bridge/br_forward.c:249
br_handle_frame_finish+0xe8e/0x1c20 net/bridge/br_input.c:220
br_nf_hook_thresh+0x301/0x410 net/bridge/br_netfilter_hooks.c:1170
br_nf_pre_routing_finish_ipv6+0x76a/0xfb0 net/bridge/br_netfilter_ipv6.c:154
NF_HOOK include/linux/netfilter.h:314 [inline]
br_nf_pre_routing_ipv6+0x3cd/0x8c0 net/bridge/br_netfilter_ipv6.c:184
br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:508
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:282 [inline]
br_handle_frame+0xad5/0x14a0 net/bridge/br_input.c:433
__netif_receive_skb_core.constprop.0+0xa23/0x4a00 net/core/dev.c:5780
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:5892
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6007
process_backlog+0x442/0x15e0 net/core/dev.c:6359
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:7331
napi_poll net/core/dev.c:7395 [inline]
net_rx_action+0xa97/0x1010 net/core/dev.c:7517
handle_softirqs+0x216/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:slab_update_freelist mm/slub.c:728 [inline]
RIP: 0010:__slab_free+0xbc/0x500 mm/slub.c:4498
Code: 44 89 7c 24 68 66 45 85 ff 74 07 45 31 f6 84 c0 74 0e 45 31 f6 80 7c 24 38 00 0f 84 0c 01 00 00 48 8b 44 24 30 48 8b 4c 24 68 40 0a 20 74 64 4c 89 e0 48 8b 5c 24 08 f0 49 0f c7 4d 20 0f 94
RSP: 0018:ffffc9000f747380 EFLAGS: 00000246
RAX: ffff888141ebec80 RBX: ffff888141ebec80 RCX: 000000000010000e
RDX: 000000000010000f RSI: ffff88802a052200 RDI: ffffc9000f747400
RBP: ffffc9000f747430 R08: 0000000000000001 R09: ffffffff8220b4e9
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88802a052000
R13: ffffea0000a81480 R14: 0000000000000000 R15: 000000000010000e
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4151 [inline]
slab_alloc_node mm/slub.c:4200 [inline]
__do_kmalloc_node mm/slub.c:4330 [inline]
__kmalloc_noprof+0x1d4/0x510 mm/slub.c:4343
kmalloc_noprof include/linux/slab.h:909 [inline]
kmalloc_array_noprof include/linux/slab.h:948 [inline]
ext4_find_extent+0x844/0xa70 fs/ext4/extents.c:916
ext4_ext_map_blocks+0x27d/0x5d60 fs/ext4/extents.c:4205
ext4_map_create_blocks fs/ext4/inode.c:519 [inline]
ext4_map_blocks+0x45b/0x1390 fs/ext4/inode.c:705
ext4_convert_unwritten_extents+0x2ab/0x4c0 fs/ext4/extents.c:4822
ext4_convert_unwritten_io_end_vec+0x127/0x280 fs/ext4/extents.c:4861
ext4_end_io_end+0xd5/0x4a0 fs/ext4/page-io.c:199
ext4_do_flush_completed_IO fs/ext4/page-io.c:287 [inline]
ext4_end_io_rsv_work+0x205/0x380 fs/ext4/page-io.c:302
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
rescuer_thread+0x620/0xea0 kernel/workqueue.c:3496
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
net_ratelimit: 18144 callbacks suppressed
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:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:6a:28:ed:50:57:31, 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 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 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:6a:28:ed:50:57:31, 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: 22314 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:6a:28:ed:50:57:31, 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:6a:28:ed:50:57:31, 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: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:6a:28:ed:50:57:31, vlan:0)