syzbot


BUG: soft lockup in sys_clone

Status: upstream: reported C repro on 2024/04/20 04:17
Bug presence: origin:lts
[Documentation on labels]
Reported-by: syzbot+ed8a52605340709080c9@syzkaller.appspotmail.com
First crash: 69d, last: 21d
Bug presence (2)
Date Name Commit Repro Result
2024/04/20 lts (merge base) 6139f2a02fe0 C [report] BUG: soft lockup in sys_mkdirat
2024/04/20 upstream (ToT) 13a2e429f644 C Didn't crash
Similar bugs (10)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: soft lockup in sys_clone kernel 3 1541d 1545d 0/27 closed as invalid on 2020/05/29 21:04
linux-5.15 INFO: rcu detected stall in sys_clone 1 192d 192d 0/3 auto-obsoleted due to no activity on 2024/03/15 18:08
linux-6.1 INFO: rcu detected stall in sys_clone 3 339d 411d 0/3 auto-obsoleted due to no activity on 2023/10/20 18:18
upstream INFO: rcu detected stall in sys_clone (4) kernel 1 1082d 1082d 0/27 auto-closed as invalid on 2021/09/27 17:49
upstream INFO: rcu detected stall in sys_clone (6) kasan mm 1 753d 753d 0/27 auto-closed as invalid on 2022/08/23 03:28
upstream INFO: rcu detected stall in sys_clone (8) bpf C error 30 1d15h 79d 0/27 upstream: reported C repro on 2024/03/29 00:16
upstream INFO: rcu detected stall in sys_clone (5) kernfs 5 887d 986d 0/27 closed as invalid on 2022/02/08 10:00
upstream INFO: rcu detected stall in sys_clone (7) fs 1 488d 488d 0/27 auto-obsoleted due to no activity on 2023/05/14 17:18
linux-5.15 INFO: rcu detected stall in sys_clone (2) origin:upstream missing-backport C 3 12d 81d 0/3 upstream: reported C repro on 2024/03/27 00:16
linux-6.1 INFO: rcu detected stall in sys_clone (2) 3 19d 87d 0/3 upstream: reported on 2024/03/20 15:17
Last patch testing requests (8)
Created Duration User Patch Repo Result
2024/06/09 05:39 20m retest repro android13-5.15-lts report log
2024/06/09 05:10 13m retest repro android13-5.15-lts report log
2024/05/14 18:47 18m retest repro android13-5.15-lts report log
2024/05/14 18:47 17m retest repro android13-5.15-lts report log
2024/05/14 18:47 11m retest repro android13-5.15-lts report log
2024/05/14 17:55 17m retest repro android13-5.15-lts report log
2024/05/14 17:55 17m retest repro android13-5.15-lts report log
2024/05/14 17:55 10m retest repro android13-5.15-lts report log

Sample crash report:
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd7d3d10b0
R10: 0000555556610650 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd7d382cec R14: 00007ffd7d382d00 R15: 00007ffd7d382cf0
 </TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 226s! [syz-executor308:715]
Modules linked in:
CPU: 0 PID: 715 Comm: syz-executor308 Not tainted 5.15.149-syzkaller-00055-g424f92bcbe8f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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:ffffc900000a73a0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff92000014e78 RCX: 1ffffffff0d1aa9c
RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8881f7037ed4
RBP: ffffc900000a7450 R08: dffffc0000000000 R09: ffffed103ee06fdb
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881f7037ed4 R14: 0000000000000001 R15: 1ffff92000014e7c
FS:  0000555556610380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd7d382bd8 CR3: 0000000107b82000 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/0xc18
 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_run4+0x13f/0x270 kernel/trace/bpf_trace.c:1922
 __bpf_trace_mm_page_alloc+0xbf/0xf0 include/trace/events/kmem.h:201
 __traceiter_mm_page_alloc+0x3a/0x60 include/trace/events/kmem.h:201
 trace_mm_page_alloc include/trace/events/kmem.h:201 [inline]
 __alloc_pages+0x3cb/0x8f0 mm/page_alloc.c:5798
 __alloc_pages_node include/linux/gfp.h:591 [inline]
 alloc_pages_node include/linux/gfp.h:605 [inline]
 alloc_pages include/linux/gfp.h:618 [inline]
 __get_free_pages+0x10/0x30 mm/page_alloc.c:5813
 _pgd_alloc arch/x86/mm/pgtable.c:414 [inline]
 pgd_alloc+0x21/0x2c0 arch/x86/mm/pgtable.c:430
 mm_alloc_pgd kernel/fork.c:690 [inline]
 mm_init+0x5c7/0x970 kernel/fork.c:1139
 dup_mm kernel/fork.c:1518 [inline]
 copy_mm+0x1e3/0x13e0 kernel/fork.c:1573
 copy_process+0x1149/0x3290 kernel/fork.c:2264
 kernel_clone+0x21e/0x9e0 kernel/fork.c:2662
 __do_sys_clone kernel/fork.c:2788 [inline]
 __se_sys_clone kernel/fork.c:2772 [inline]
 __x64_sys_clone+0x23f/0x290 kernel/fork.c:2772
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f72cf9f40f3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffd7d382bd8 EFLAGS: 00000246
 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f72cf9f40f3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd7d3d10b0
R10: 0000555556610650 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd7d382cec R14: 00007ffd7d382d00 R15: 00007ffd7d382cf0
 </TASK>

Crashes (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/26 03:11 android13-5.15-lts 424f92bcbe8f a10a183e .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/05/23 06:10 android13-5.15-lts 5d96939590c0 4d098039 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in sys_clone
2024/04/30 16:59 android13-5.15-lts 5d96939590c0 3ce4924c .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/28 20:25 android13-5.15-lts 5d96939590c0 07b455f9 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/27 14:41 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 sys_clone
2024/04/21 13:22 android13-5.15-lts ad06eaf051cd af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/21 02:18 android13-5.15-lts ad06eaf051cd af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in sys_clone
2024/04/20 04:12 android13-5.15-lts ad06eaf051cd af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in sys_clone
2024/04/28 23:53 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 sys_clone
2024/04/24 16:38 android13-5.15-lts ad06eaf051cd 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/17 15:08 android13-5.15-lts ad06eaf051cd acc528cb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
2024/04/07 21:06 android13-5.15-lts 993bed180178 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_clone
* Struck through repros no longer work on HEAD.