syzbot


BUG: soft lockup in destroy_list_workfn

Status: upstream: reported C repro on 2024/04/16 08:37
Bug presence: origin:lts
[Documentation on labels]
Reported-by: syzbot+0abc590b026f5117dc4c@syzkaller.appspotmail.com
First crash: 192d, last: 62d
Fix bisection: fixed by (bisect log) :
commit 11e8ecc5b86037fec43d07b1c162e233e131b1d9
Author: Jakub Sitnicki <jakub@cloudflare.com>
Date: Mon May 27 11:20:07 2024 +0000

  bpf: Allow delete from sockmap/sockhash only if update is allowed

  
Bug presence (3)
Date Name Commit Repro Result
2024/04/16 lts (merge base) 6139f2a02fe0 C [report] BUG: soft lockup in sock_close
2024/10/15 lts (merge base) 3a5928702e71 C Failed due to an error; will retry later
2024/04/16 upstream (ToT) 96fca68c4fbf C Didn't crash
Last patch testing requests (6)
Created Duration User Patch Repo Result
2024/10/15 01:46 0m retest repro android13-5.15-lts error
2024/10/15 01:46 0m retest repro android13-5.15-lts error
2024/07/28 20:17 16m retest repro android13-5.15-lts report log
2024/07/28 20:17 14m retest repro android13-5.15-lts report log
2024/05/15 21:09 12m retest repro android13-5.15-lts report log
2024/05/15 21:09 28m retest repro android13-5.15-lts report log
Fix bisection attempts (4)
Created Duration User Patch Repo Result
2024/10/01 00:14 4h26m bisect fix android13-5.15-lts OK (1) job log
2024/08/23 20:40 1h20m bisect fix android13-5.15-lts OK (0) job log log
2024/07/14 14:06 1h52m bisect fix android13-5.15-lts OK (0) job log log
2024/06/02 17:59 1h04m bisect fix android13-5.15-lts OK (0) job log log

Sample crash report:
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 225s! [kworker/0:1:20]
Modules linked in:
CPU: 0 PID: 20 Comm: kworker/0:1 Not tainted 5.15.148-syzkaller-00013-gad06eaf051cd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events destroy_list_workfn

RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x147/0x180 arch/x86/kernel/kvm.c:918
Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d 5b 03 f3 03 fb f4 <e9> 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c
RSP: 0018:ffffc90000147820 EFLAGS: 00000246

RAX: 0000000000000001 RBX: 1ffff92000028f08 RCX: 1ffffffff0d1aa9c
RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8881f7037ed4
RBP: ffffc900001478d0 R08: dffffc0000000000 R09: ffffed103ee06fdb
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881f7037ed4 R14: 0000000000000001 R15: 1ffff92000028f0c
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f91dcbcf080 CR3: 000000010a15f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
 pv_wait_node kernel/locking/qspinlock_paravirt.h:325 [inline]
 __pv_queued_spin_lock_slowpath+0x41b/0xc40 kernel/locking/qspinlock.c:473
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock include/linux/spinlock.h:187 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x139/0x1b0 kernel/locking/spinlock.c:178
 sock_hash_delete_elem+0xb1/0x2f0 net/core/sock_map.c:937
 bpf_prog_2c29ac5cdc6b1842+0x3a/0x670
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:625 [inline]
 bpf_prog_run include/linux/filter.h:632 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1883 [inline]
 bpf_trace_run2+0xec/0x210 kernel/trace/bpf_trace.c:1920
 __bpf_trace_kfree+0x6f/0x90 include/trace/events/kmem.h:118
 trace_kfree include/trace/events/kmem.h:118 [inline]
 kfree+0x1f3/0x220 mm/slub.c:4569
 destroy_list_workfn+0x229/0x2e0 kernel/locking/percpu-rwsem.c:309
 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/23 13:54 android13-5.15-lts ad06eaf051cd 21339d7b .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in destroy_list_workfn
2024/04/16 08:36 android13-5.15-lts ad06eaf051cd 0d592ce4 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in destroy_list_workfn
2024/05/01 20:50 android13-5.15-lts 5d96939590c0 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in destroy_list_workfn
2024/04/29 00:20 android13-5.15-lts 5d96939590c0 07b455f9 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in destroy_list_workfn
2024/04/28 18:04 android13-5.15-lts 5d96939590c0 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in destroy_list_workfn
2024/04/27 10:55 android13-5.15-lts 5d96939590c0 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in destroy_list_workfn
2024/04/20 04:30 android13-5.15-lts ad06eaf051cd af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in destroy_list_workfn
2024/04/19 12:33 android13-5.15-lts ad06eaf051cd af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in destroy_list_workfn
2024/04/17 06:21 android13-5.15-lts ad06eaf051cd 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in destroy_list_workfn
* Struck through repros no longer work on HEAD.