INFO: rcu detected stall in unix_dgram_sendmsg (5)

Status: closed as invalid on 2026/10/06 02:03
Subsystems: mm
Labels: prio:normal
[Documentation on labels]
First crash: 109d, last: 14d
▶ ▼ ✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision
71c2cfd9 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ INFO: rcu detected stall in unix_dgram_sendmsg (5) 2026/07/01 01:41 2026/07/01 01:41 2026/07/01 02:20 93f57954
e84ee494 assessment-security 💥 INFO: rcu detected stall in unix_dgram_sendmsg (5) 2026/06/29 00:29 2026/06/29 00:29 2026/06/29 00:29 fb92f11c
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in unix_dgram_sendmsg (2) kernel 1 2 1391d 1440d 0/29 auto-obsoleted due to no activity on 2023/04/10 02:12
upstream INFO: rcu detected stall in unix_dgram_sendmsg net 1 1 1577d 1577d 0/29 auto-closed as invalid on 2022/09/18 14:12
upstream INFO: rcu detected stall in unix_dgram_sendmsg (4) net 1 1 274d 274d 0/29 auto-obsoleted due to no activity on 2026/03/14 06:19
upstream INFO: rcu detected stall in unix_dgram_sendmsg (3) net 1 4 1110d 1245d 0/29 auto-obsoleted due to no activity on 2023/12/29 14:50

Sample crash report:
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6240/1:b..l P4980/1:b..l P5659/1:b..l P6031/1:b..l P6234/1:b..l
rcu: 	(detected by 1, t=10780 jiffies, g=20461, q=1174 ncpus=2)
task:syz.0.124       state:R  running task     stack:25296 pid:6234  tgid:6234  ppid:5678   task_flags:0x40044c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7284
 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7463
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
 _raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:213
 spin_unlock include/linux/spinlock.h:401 [inline]
 zap_pte_range mm/memory.c:2095 [inline]
 zap_pmd_range mm/memory.c:2151 [inline]
 zap_pud_range mm/memory.c:2179 [inline]
 zap_p4d_range mm/memory.c:2200 [inline]
 __zap_vma_range+0x40e1/0x4f80 mm/memory.c:2240
 unmap_vmas+0x390/0x550 mm/memory.c:2309
 exit_mmap+0x293/0x9f0 mm/mmap.c:1315
 __mmput+0x118/0x420 kernel/fork.c:1193
 exit_mm+0x18e/0x240 kernel/exit.c:592
 do_exit+0x6cd/0x2360 kernel/exit.c:974
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
 get_signal+0x121b/0x12c0 kernel/signal.c:3112
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f27d9e159
RSP: 002b:00007f4f2814fba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 000000000005e4f5 RCX: 00007f4f27d9e159
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4f28025fac
RBP: 0000000000000032 R08: 3fffffffffffffff R09: 0000000000000000
R10: 00007f4f2814fcb0 R11: 0000000000000246 R12: 00007f4f2814fcd0
R13: 00007f4f28025fac R14: 000000000005e527 R15: 00007f4f2814fcb0
 </TASK>
task:kworker/1:12    state:R  running task     stack:23656 pid:6031  tgid:6031  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: wg-crypt-wg1 wg_packet_encrypt_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7284
 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7463
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 class_preempt_destructor include/linux/preempt.h:496 [inline]
 try_to_wake_up+0x901/0x14d0 kernel/sched/core.c:4445
 process_one_work kernel/workqueue.c:3364 [inline]
 process_scheduled_works+0xa3d/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
 </TASK>
task:syz-executor    state:R  running task     stack:24296 pid:5659  tgid:5659  ppid:5653   task_flags:0x40050c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7284
 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7463
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
 _raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:213
 spin_unlock include/linux/spinlock.h:401 [inline]
 zap_pte_range mm/memory.c:2095 [inline]
 zap_pmd_range mm/memory.c:2151 [inline]
 zap_pud_range mm/memory.c:2179 [inline]
 zap_p4d_range mm/memory.c:2200 [inline]
 __zap_vma_range+0x40e1/0x4f80 mm/memory.c:2240
 unmap_vmas+0x390/0x550 mm/memory.c:2309
 exit_mmap+0x293/0x9f0 mm/mmap.c:1315
 __mmput+0x118/0x420 kernel/fork.c:1193
 exit_mm+0x18e/0x240 kernel/exit.c:592
 do_exit+0x6cd/0x2360 kernel/exit.c:974
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
 get_signal+0x121b/0x12c0 kernel/signal.c:3112
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f27d5e98e
RSP: 002b:00007ffe0e73ca58 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 0000555583066500 RCX: 00007f4f27d5e98e
RDX: 0000000040000000 RSI: 00007ffe0e73cacc RDI: ffffffffffffffff
RBP: 00007ffe0e73cacc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 0000000000000003 R14: 00007ffe0e73cd28 R15: 0000000000000000
 </TASK>
task:klogd           state:R  running task     stack:22280 pid:4980  tgid:4980  ppid:1      task_flags:0x400100 flags:0x00080000
Call Trace:
 <TASK>
 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/0x910 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:222 [inline]
RIP: 0010:unwind_next_frame+0x1d3/0x2550 arch/x86/kernel/unwind_orc.c:510
Code: c0 48 81 fd e8 98 ea 8b 0f 93 c1 08 c1 0f 85 0b 01 00 00 48 c7 c0 00 00 00 81 49 89 ef 49 29 c7 49 c1 ef 08 8b 15 1d aa f6 0c <8d> 42 ff 44 39 f8 0f 86 6c 04 00 00 44 89 f8 4c 8d 2c 85 c0 a9 c2
RSP: 0018:ffffc900032172a0 EFLAGS: 00000203
RAX: ffffffff81000000 RBX: 0000000000000001 RCX: 8000000000000000
RDX: 00000000000aea9a RSI: ffffffff8c6dad60 RDI: ffffffff8c6dad20
RBP: ffffffff822c6be3 R08: ffffffff8177f1df R09: 0000000000000000
R10: ffffc90003217398 R11: ffffffff81b2a320 R12: dffffc0000000000
R13: ffffffff8177f1df R14: ffffc90003217348 R15: 0000000000012c6b
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:183
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:338
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 __free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
 __slab_free+0x274/0x2c0 mm/slub.c:5823
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:417
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5414 [inline]
 __kmalloc_node_track_caller_noprof+0x4b4/0x720 mm/slub.c:5545
 kmalloc_reserve net/core/skbuff.c:637 [inline]
 __alloc_skb+0x2c1/0x7a0 net/core/skbuff.c:715
 alloc_skb include/linux/skbuff.h:1384 [inline]
 alloc_skb_with_frags+0xc6/0x760 net/core/skbuff.c:6799
 sock_alloc_send_pskb+0x878/0x990 net/core/sock.c:3022
 unix_dgram_sendmsg+0x4da/0x17b0 net/unix/af_unix.c:2144
 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800
 __sock_sendmsg net/socket.c:815 [inline]
 __sys_sendto+0x408/0x5a0 net/socket.c:2281
 __do_sys_sendto net/socket.c:2288 [inline]
 __se_sys_sendto net/socket.c:2284 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2284
 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: 0033:0x7f9506a2f407
RSP: 002b:00007fff4982f560 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f95068dfc80 RCX: 00007f9506a2f407
RDX: 00000000000000a0 RSI: 00007fff4982f6a0 RDI: 0000000000000003
RBP: 00007fff4982fad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000202 R12: 00007fff4982fae8
R13: 00007fff4982f6a0 R14: 0000000000000085 R15: 00007fff4982f6a0
 </TASK>
task:syz.3.127       state:R  running task     stack:25608 pid:6240  tgid:6240  ppid:5683   task_flags:0x40044c flags:0x00080003
Call Trace:
 <TASK>
 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/0x910 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:unwind_next_frame+0x1a7a/0x2550 arch/x86/kernel/unwind_orc.c:694
Code: 0f 96 c1 4c 39 f8 0f 97 c2 20 ca 80 fa 01 0f 85 f4 00 00 00 49 8d 4f 08 4c 39 e1 0f 86 e7 00 00 00 48 39 c1 0f 87 de 00 00 00 <4c> 3b 7c 24 68 0f 87 d3 00 00 00 49 8d 5e 28 48 89 d8 48 c1 e8 03
RSP: 0018:ffffc90006a5f2a0 EFLAGS: 00000287
RAX: ffffc90006a60000 RBX: ffffc90006a5f358 RCX: ffffc90006a5f988
RDX: ffffc90006a5f301 RSI: dffffc0000000000 RDI: ffffc90006a5f350
RBP: 1ffffffff22c4201 R08: ffffc90006a5f970 R09: 0000000000000000
R10: ffffc90006a5f398 R11: fffff52000d4be75 R12: ffffc90006a58000
R13: ffffffff8177f1df R14: ffffc90006a5f348 R15: ffffc90006a5f980
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:183
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:338
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 __free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
 __slab_free+0x274/0x2c0 mm/slub.c:5823
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4683 [inline]
 slab_alloc_node mm/slub.c:4996 [inline]
 __kmalloc_cache_noprof+0x29f/0x600 mm/slub.c:5559
 _kmalloc_noprof include/linux/slab.h:991 [inline]
 _kzalloc_noprof include/linux/slab.h:1312 [inline]
 kobject_uevent_env+0x289/0x9e0 lib/kobject_uevent.c:543
 __device_release_driver drivers/base/dd.c:1361 [inline]
 device_release_driver_internal+0x782/0x880 drivers/base/dd.c:1372
 driver_detach+0x1f3/0x2d0 drivers/base/dd.c:1435
 bus_remove_driver+0x226/0x320 drivers/base/bus.c:832
 usb_gadget_unregister_driver+0x4e/0x70 drivers/usb/gadget/udc/core.c:1784
 raw_release+0xd7/0x260 drivers/usb/gadget/legacy/raw_gadget.c:463
 __fput+0x418/0xa50 fs/file_table.c:512
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x73a/0x2360 kernel/exit.c:986
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
 get_signal+0x121b/0x12c0 kernel/signal.c:3112
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5afe39e159
RSP: 002b:00007f5afe74fba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffff92 RBX: 000000000005e6f9 RCX: 00007f5afe39e159
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5afe625fac
RBP: 0000000000000bea R08: 3fffffffffffffff R09: 0000000000000000
R10: 00007f5afe74fcb0 R11: 0000000000000246 R12: 00007f5afe74fcd0
R13: 00007f5afe625fac R14: 000000000005f2e3 R15: 00007f5afe74fcb0
 </TASK>
rcu: rcu_preempt kthread starved for 10897 jiffies! g20461 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:27688 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:unwind_next_frame+0xfd/0x2550 arch/x86/kernel/unwind_orc.c:498
Code: 1f c6 05 bc d0 eb 0e 01 48 c7 c7 c0 c3 09 8c be 53 03 00 00 48 c7 c2 00 c4 09 8c e8 cd a0 2b 00 48 89 6c 24 38 48 89 5c 24 40 <49> 8d 5e 50 48 89 d8 48 c1 e8 03 48 89 44 24 28 42 80 3c 20 00 74
RSP: 0018:ffffc90000a17e60 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff89b590e9 RCX: 0000000000000102
RDX: 00000000e61b7dd1 RSI: ffffffff8c6dad60 RDI: ffffffff8c6dad20
RBP: 1ffff92000142fe8 R08: ffffffff8177f1df R09: 0000000000000000
R10: ffffc90000a17f58 R11: ffffffff81b2a320 R12: dffffc0000000000
R13: ffffffff8177f1df R14: ffffc90000a17f08 R15: 1ffff92000142fe1
FS:  0000000000000000(0000) GS:ffff888124dc8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000034e030 CR3: 000000005c14a000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 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
 unpoison_slab_object mm/kasan/common.c:351 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:377
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4683 [inline]
 slab_alloc_node mm/slub.c:4996 [inline]
 kmem_cache_alloc_noprof+0x2b9/0x600 mm/slub.c:5010
 skb_clone+0x212/0x3a0 net/core/skbuff.c:2119
 deliver_clone net/bridge/br_forward.c:125 [inline]
 maybe_deliver net/bridge/br_forward.c:191 [inline]
 br_flood+0x3c0/0x8d0 net/bridge/br_forward.c:245
 br_handle_frame_finish+0x1119/0x1950 net/bridge/br_input.c:229
 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:6152
 __netif_receive_skb_one_core net/core/dev.c:6263 [inline]
 __netif_receive_skb net/core/dev.c:6378 [inline]
 process_backlog+0x727/0x18b0 net/core/dev.c:6729
 __napi_poll+0xaa/0x330 net/core/dev.c:7798
 napi_poll net/core/dev.c:7861 [inline]
 net_rx_action+0x61d/0xf50 net/core/dev.c:8018
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: fb 87 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d d3 e1 22 00 fb f4 <e9> 8c 08 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001a7e40 EFLAGS: 00000242
RAX: 0000000000dfe675 RBX: ffffffff819bcb1c RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8e415fcc RDI: ffffffff8c6dad80
RBP: ffffc900001a7f10 R08: ffff8880b8733a1b R09: 1ffff110170e6743
R10: dffffc0000000000 R11: ffffed10170e6744 R12: 0000000000000000
R13: 1ffff11003cd1bb8 R14: 1ffff92000034fd0 R15: dffffc0000000000
 arch_safe_halt arch/x86/kernel/process.c:767 [inline]
 default_idle+0x9/0x20 arch/x86/kernel/process.c:768
 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x1cc/0x540 kernel/sched/idle.c:355
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x157
 </TASK>
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)

Crashes (51):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/29 22:18 upstream 6f8319e3e9a4 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/16 19:43 upstream 9b87fdc9af2f 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/03 17:35 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/28 04:27 upstream 73e3f0710014 e2fa417d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/19 16:02 upstream 0f23d56f17fd 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/08 22:49 upstream a59f57e2aa12 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/04 12:27 upstream 848acc8ffe1b d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/28 10:20 upstream 62cc90241548 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/28 10:18 upstream 62cc90241548 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/21 17:05 upstream b95f03f04d47 7c5de9c3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/18 16:45 upstream 1229e2e57a5c 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/06 01:23 upstream f105f3631d51 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/15 03:58 upstream 50d05c7c76c9 924033e8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/30 00:47 net 54518e0e827f 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/25 09:54 net 11536ee3d3e0 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/21 01:25 net c82b797abe66 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/08 03:37 net 74f27fc8642b 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/21 14:51 net 746fc0787f61 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/17 07:05 net 24ef02f934ee 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/11 18:06 net b37971686ec5 37a258dd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/09 22:46 net dd057113ac7b 5d63f80b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/06 08:39 net 9113e98eb7e3 cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/05 21:49 net aa2e13ae8d3c cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/02 18:45 net af39eb111ce6 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/01 02:56 net 2195424c3da2 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/30 07:51 net 54ad7ea45d63 2377cd3d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/26 16:35 net 53658c6f3682 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/22 15:35 net ba712ecfd942 b561ce9c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/21 06:13 net 1c975de3343c de6a700d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/17 22:50 net bc7291793fdc 7f27c57a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/17 03:16 net 3f1f75536668 8f30cfd7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/15 00:29 net 3f1f75536668 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/13 08:43 net 3f1f75536668 d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/11 14:40 net 1cd23ca80784 d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/10 02:09 net f5089008f90c 4167ee25 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/05 22:37 net d7a8d500d7e4 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/06/30 21:17 net 2a00517db8de 00e8b0fd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/06/30 10:56 net 2b66974a1b61 fff8d0a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/06/27 11:44 net 6c00e85cd46f fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/17 13:18 net-next 7bc21b740291 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/15 12:11 net-next 0019aa65bbc6 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/28 21:05 net-next 1b78070aaef6 bcbc8ceb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/24 22:49 net-next 91ec20351349 23caa175 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/14 00:42 net-next 3205699d79f2 a9ede23c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/08/05 18:17 net-next a23b36233d41 b3eac40e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/31 08:24 net-next a5c6ae8de11e aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/07/16 09:48 net-next f6f3b36c15ed 27a8bd60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/06/30 06:08 net-next ba7ad852e1ae fff8d0a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/22 17:05 linux-next 9d80aa4617b3 3e2106e5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: rcu detected stall in unix_dgram_sendmsg
2026/09/12 08:22 linux-next a9d7ced84989 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: rcu detected stall in unix_dgram_sendmsg
* Struck through repros no longer work on HEAD.