syzbot
INFO: rcu detected stall in vhci_release
Status:
upstream: reported syz repro on 2024/09/28 11:56
Subsystems:
mm
Labels:
prio:high
[Documentation on labels]
Reported-by: syzbot+46c3d1706c2d2688baba@syzkaller.appspotmail.com
First crash: 831d, last: 1d18h
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Last patch testing requests (10)
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Fix bisection attempts (2)
Sample crash report:
bridge0: received packet on veth0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12456/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=92449, q=2194 ncpus=2)
task:syz.5.1766 state:R running task stack:26128 pid:12456 tgid:12455 ppid:8515 task_flags:0x40044c flags:0x00080001
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5520 [inline]
__schedule+0x17d4/0x5820 kernel/sched/core.c:7270
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7592
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+0x19d8/0x2550 arch/x86/kernel/unwind_orc.c:693
Code: 49 8d 56 40 4c 89 f7 4c 89 c6 e8 33 0e 00 00 84 c0 0f 84 4e 01 00 00 48 bb 00 00 00 00 00 fc ff df 48 8b 44 24 10 0f b6 04 18 <84> c0 0f 85 7b 08 00 00 40 b5 01 8b 44 24 5c 41 39 06 4c 8b 6c 24
RSP: 0018:ffffc9000eeaf240 EFLAGS: 00000202
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000001
RDX: ffffc9000eeaf328 RSI: dffffc0000000000 RDI: ffffc9000eeafe88
RBP: 1ffffffff221ee5a R08: ffffc9000eeafe88 R09: 0000000000000000
R10: ffffc9000eeaf338 R11: fffff52001dd5e69 R12: dffffc0000000000
R13: ffffffff910f72d1 R14: ffffc9000eeaf2e8 R15: ffffc9000eeaf330
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
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2678 [inline]
slab_free mm/slub.c:6372 [inline]
kmem_cache_free+0x182/0x650 mm/slub.c:6499
kfree_skb_reason include/linux/skbuff.h:1323 [inline]
__skb_queue_purge_reason include/linux/skbuff.h:3441 [inline]
skb_queue_purge_reason+0x2e5/0x3a0 net/core/skbuff.c:4027
skb_queue_purge include/linux/skbuff.h:3454 [inline]
vhci_flush+0x44/0x50 drivers/bluetooth/hci_vhci.c:69
hci_dev_close_sync+0x8a8/0x10a0 net/bluetooth/hci_sync.c:5600
hci_dev_do_close net/bluetooth/hci_core.c:502 [inline]
hci_unregister_dev+0x232/0x5b0 net/bluetooth/hci_core.c:2681
vhci_release+0x16d/0x1c0 drivers/bluetooth/hci_vhci.c:700
__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:1008
do_group_exit+0x22d/0x2f0 kernel/exit.c:1151
get_signal+0x121b/0x12c0 kernel/signal.c:3046
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:336 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f90a419e0d9
RSP: 002b:00007f90a51220e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f90a4425fa8 RCX: 00007f90a419e0d9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f90a4425fac
RBP: 00007f90a4425fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f90a4426038 R14: 00007f90a454f960 R15: 00007f90a454fa48
</TASK>
net_ratelimit: 12006 callbacks suppressed
bridge0: received packet on veth1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
net_ratelimit: 13868 callbacks suppressed
bridge0: received packet on veth0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
Struck through repros no longer work on HEAD.