BUG: soft lockup in mrp_join_timer

Status: auto-closed as invalid on 2020/10/25 16:14
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+ed92111da967dc654ca5@syzkaller.appspotmail.com
First crash: 2157d, last: 2157d
▶ ▼ Similar bugs (7)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in mrp_join_timer (4) net 1 10 654d 784d 0/29 auto-obsoleted due to no activity on 2025/01/05 17:43
upstream BUG: soft lockup in mrp_join_timer (4) net 1 1 359d 359d 0/29 closed as invalid on 2025/09/01 08:24
linux-4.14 BUG: soft lockup in mrp_join_timer 1 1 1949d 1949d 0/1 auto-closed as invalid on 2021/07/20 15:25
upstream BUG: soft lockup in mrp_join_timer (2) net 1 1 1026d 1026d 0/29 closed as invalid on 2023/11/01 18:32
linux-4.19 BUG: soft lockup in mrp_join_timer (2) 1 58 1247d 1924d 0/1 upstream: reported on 2021/04/16 18:29
upstream BUG: soft lockup in mrp_join_timer (3) net 1 2 444d 449d 0/29 closed as invalid on 2025/06/11 12:25
linux-4.19 BUG: soft lockup in mrp_join_timer 1 2 2084d 2099d 0/1 auto-closed as invalid on 2021/03/07 20:15

Sample crash report:
watchdog: BUG: soft lockup - CPU#1 stuck for 113s! [syz-executor.2:11290]
Modules linked in:
irq event stamp: 22075649
hardirqs last  enabled at (22075648): [<ffffffff88000c42>] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
hardirqs last disabled at (22075649): [<ffffffff87f6896d>] irqentry_enter+0x1d/0x50 kernel/entry/common.c:319
softirqs last  enabled at (7036084): [<ffffffff88000f2f>] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
softirqs last disabled at (7037591): [<ffffffff88000f2f>] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
CPU: 1 PID: 11290 Comm: syz-executor.2 Not tainted 5.9.0-rc2-next-20200826-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:skb_dequeue+0x0/0x180 net/core/skbuff.c:3036
Code: 84 89 48 83 c4 08 89 ee ba 20 0a 00 00 48 89 df 5b 5d e9 93 13 74 fb 48 89 04 24 e8 8a 4e 7c fb 48 8b 04 24 eb d4 0f 1f 40 00 <41> 56 41 55 41 54 55 53 48 89 fb e8 b0 db 3b fb 4c 8d 6b 18 4c 89
RSP: 0018:ffffc90000da8ce8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880403fd0f0 RCX: 0000000000000000
RDX: ffff888099a40580 RSI: ffffffff865972bf RDI: ffff8880403fd0f0
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880403fd0b3
R10: ffffed100807fa16 R11: 0000000000000000 R12: ffff8880403fd000
R13: ffff8880403fd0b0 R14: ffff888044931d00 R15: ffff8880ae725580
FS:  0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000746918 CR3: 000000008cbc1000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 mrp_queue_xmit net/802/mrp.c:350 [inline]
 mrp_join_timer+0x97/0xc0 net/802/mrp.c:595
 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
 expire_timers kernel/time/timer.c:1458 [inline]
 __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
 __run_timers kernel/time/timer.c:1736 [inline]
 run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
 __do_softirq+0x2de/0xa24 kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:653 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x8c/0xe0 kernel/locking/spinlock.c:191
Code: 48 c7 c0 c8 3e b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d 83 20 bd 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 75 95 56 f9 65 8b 05 1e e0 08 78
RSP: 0018:ffffc90003dc7550 EFLAGS: 00000286
RAX: 1ffffffff136c7d9 RBX: 0000000000000286 RCX: 1ffffffff1576ef9
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000286
RBP: ffffffff8cc20c00 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000003 R14: dead000000000100 R15: dffffc0000000000
 __debug_check_no_obj_freed lib/debugobjects.c:977 [inline]
 debug_check_no_obj_freed+0x20c/0x41c lib/debugobjects.c:998
 free_pages_prepare mm/page_alloc.c:1214 [inline]
 __free_pages_ok+0x240/0xcb0 mm/page_alloc.c:1471
 release_pages+0x532/0x1650 mm/swap.c:881
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
 tlb_flush_mmu+0xe9/0x6b0 mm/mmu_gather.c:249
 zap_pte_range mm/memory.c:1159 [inline]
 zap_pmd_range mm/memory.c:1197 [inline]
 zap_pud_range mm/memory.c:1226 [inline]
 zap_p4d_range mm/memory.c:1247 [inline]
 unmap_page_range+0x1dbc/0x2ab0 mm/memory.c:1268
 unmap_single_vma+0x198/0x300 mm/memory.c:1313
 unmap_vmas+0x168/0x2e0 mm/memory.c:1345
 exit_mmap+0x2b1/0x530 mm/mmap.c:3228
 __mmput+0x122/0x470 kernel/fork.c:1075
 mmput+0x53/0x60 kernel/fork.c:1096
 exit_mm kernel/exit.c:483 [inline]
 do_exit+0xa8b/0x29f0 kernel/exit.c:793
 do_group_exit+0x125/0x310 kernel/exit.c:903
 get_signal+0x428/0x1f00 kernel/signal.c:2757
 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:136 [inline]
 exit_to_user_mode_prepare+0x15d/0x1c0 kernel/entry/common.c:167
 syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:242
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: Bad RIP value.
RSP: 002b:00007fea9c074c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: 0000000000000004 RBX: 0000000000032840 RCX: 000000000045d5b9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000026
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffeaabf97af R14: 00007fea9c0759c0 R15: 000000000118cf4c
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11288 Comm: syz-executor.1 Not tainted 5.9.0-rc2-next-20200826-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0xbf5/0x5640 kernel/locking/lockdep.c:4423
Code: 81 c3 00 6e 69 8c 48 8d 7b 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 3e 3e 00 00 48 83 7b 40 00 <0f> 84 5f 0e 00 00 8b 54 24 10 2b 54 24 50 33 54 24 08 8b 4c 24 48
RSP: 0018:ffffc90000007a98 EFLAGS: 00000086
RAX: dffffc0000000000 RBX: ffffffff8c6dfdf8 RCX: ffffffff815a0a25
RDX: 1ffffffff18dbfc7 RSI: 0000000000000008 RDI: ffffffff8c6dfe38
RBP: ffff8880881c4ae8 R08: 0000000000000000 R09: ffffffff8c696aaf
R10: fffffbfff18d2d55 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880881c4180 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00e97bd70 CR3: 0000000091a6c000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5005
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:354 [inline]
 garp_join_timer+0x20/0xf0 net/802/garp.c:405
 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
 expire_timers kernel/time/timer.c:1458 [inline]
 __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
 __run_timers kernel/time/timer.c:1736 [inline]
 run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
 __do_softirq+0x2de/0xa24 kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:lock_acquire+0x28f/0xad0 kernel/locking/lockdep.c:4977
Code: 00 48 83 3d 6a d1 5b 08 00 0f 84 a6 05 00 00 48 8b 7c 24 08 57 9d 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 <48> c7 00 00 00 00 00 48 c7 40 08 00 00 00 00 48 8b 84 24 b8 00 00
RSP: 0018:ffffc90003da7608 EFLAGS: 00000286
RAX: fffff520007b4ec5 RBX: ffff8880881c4180 RCX: 00000000207dde82
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8c6969e7
R10: fffffbfff18d2d3c R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff89c67640 R14: 0000000000000000 R15: ffff8880881c4180
 rcu_lock_acquire include/linux/rcupdate.h:248 [inline]
 rcu_read_lock include/linux/rcupdate.h:641 [inline]
 lock_page_memcg+0x63/0x260 mm/memcontrol.c:2094
 page_remove_rmap+0x25/0x16f0 mm/rmap.c:1328
 zap_pte_range mm/memory.c:1093 [inline]
 zap_pmd_range mm/memory.c:1197 [inline]
 zap_pud_range mm/memory.c:1226 [inline]
 zap_p4d_range mm/memory.c:1247 [inline]
 unmap_page_range+0xf6a/0x2ab0 mm/memory.c:1268
 unmap_single_vma+0x198/0x300 mm/memory.c:1313
 unmap_vmas+0x168/0x2e0 mm/memory.c:1345
 exit_mmap+0x2b1/0x530 mm/mmap.c:3228
 __mmput+0x122/0x470 kernel/fork.c:1075
 mmput+0x53/0x60 kernel/fork.c:1096
 exit_mm kernel/exit.c:483 [inline]
 do_exit+0xa8b/0x29f0 kernel/exit.c:793
 do_group_exit+0x125/0x310 kernel/exit.c:903
 get_signal+0x428/0x1f00 kernel/signal.c:2757
 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:136 [inline]
 exit_to_user_mode_prepare+0x15d/0x1c0 kernel/entry/common.c:167
 syscall_exit_to_user_mode+0x59/0x2b0 kernel/entry/common.c:242
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: Bad RIP value.
RSP: 002b:00007f4a8a406c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: 0000000000000001 RBX: 0000000000027a00 RCX: 000000000045d5b9
RDX: 0000000000000002 RSI: 0000000020000f80 RDI: 0000000000000005
RBP: 000000000118cf88 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000024004880 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007fff662f235f R14: 00007f4a8a4079c0 R15: 000000000118cf4c

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/08/26 16:13 linux-next f37be72473a0 318430cb .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.