syzbot


BUG: soft lockup in x64_sys_call

Status: upstream: reported C repro on 2024/08/25 04:51
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+6e6b18b7bbb806b94ca7@syzkaller.appspotmail.com
First crash: 71d, last: 18d
Bug presence (2)
Date Name Commit Repro Result
2024/09/28 lts (merge base) 4878aadf2d15 C [report] BUG: soft lockup in sock_setsockopt
2024/09/28 upstream (ToT) ad46e8f95e93 C [report] BUG: soft lockup in x64_sys_call
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: rcu detected stall in x64_sys_call 1 128d 128d 0/3 auto-obsoleted due to no activity on 2024/10/06 02:18
upstream INFO: rcu detected stall in x64_sys_call input usb mm syz 115 2d17h 54d 0/28 upstream: reported syz repro on 2024/09/09 20:48
Last patch testing requests (4)
Created Duration User Patch Repo Result
2024/09/28 03:50 17m retest repro android13-5.15-lts OK log
2024/09/28 03:50 18m retest repro android13-5.15-lts OK log
2024/09/28 03:50 13m retest repro android13-5.15-lts report log
2024/09/28 03:50 13m retest repro android13-5.15-lts OK log

Sample crash report:
watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz-executor102:7843]
Modules linked in:
CPU: 0 PID: 7843 Comm: syz-executor102 Not tainted 5.15.157-syzkaller-00897-g53be7c8abe11 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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 ab ec 12 04 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:ffffc90007397660 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 1ffff92000e72ed0 RCX: ffffffff81552fff
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff88810c13cf88
RBP: ffffc90007397710 R08: dffffc0000000000 R09: ffffed10218279f2
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88810c13cf88 R14: 0000000000000003 R15: 1ffff92000e72ed4
FS:  00007fcf025ae6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf0258dd58 CR3: 0000000107b8a000 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_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x6bc/0xc40 kernel/locking/qspinlock.c:508
 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
 spin_lock_bh include/linux/spinlock.h:368 [inline]
 lock_sock_nested+0x97/0x300 net/core/sock.c:3269
 lock_sock include/net/sock.h:1676 [inline]
 tipc_sendstream+0x47/0x70 net/tipc/socket.c:1549
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2431
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2485
 __sys_sendmsg net/socket.c:2514 [inline]
 __do_sys_sendmsg net/socket.c:2523 [inline]
 __se_sys_sendmsg+0x19a/0x260 net/socket.c:2521
 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2521
 x64_sys_call+0x16a/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fcf025ed3e9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcf025ae228 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000032 RCX: 00007fcf025ed3e9
RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000004
RBP: 00007fcf02677328 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcf02677320
R13: 00007fcf0267732c R14: 00007ffe1b267990 R15: 00007ffe1b267a78
 </TASK>

Crashes (25):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/07 09:27 android13-5.15-lts 53be7c8abe11 9750182a .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/10/15 18:41 android13-5.15-lts 5e4635681cf1 7eb57b4a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/10/06 02:50 android13-5.15-lts 80dd36dca275 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/29 11:19 android13-5.15-lts 8e36931104ac ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/14 01:50 android13-5.15-lts e6fb3b0fa87f b58f933c .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/12 20:16 android13-5.15-lts e6fb3b0fa87f 60e1a995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/12 20:12 android13-5.15-lts e6fb3b0fa87f 60e1a995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/10 06:40 android13-5.15-lts c53388f01037 784df80e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/10 06:35 android13-5.15-lts c53388f01037 784df80e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/10 06:33 android13-5.15-lts c53388f01037 784df80e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/10 06:27 android13-5.15-lts c53388f01037 784df80e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/09 23:41 android13-5.15-lts c53388f01037 073f8be2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in x64_sys_call
2024/09/09 23:37 android13-5.15-lts c53388f01037 073f8be2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in x64_sys_call
2024/09/09 05:56 android13-5.15-lts 53be7c8abe11 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/08 08:05 android13-5.15-lts 53be7c8abe11 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/03 07:43 android13-5.15-lts 38761ec9fc9e 8045124c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/02 07:24 android13-5.15-lts 29d153aabd54 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/02 02:36 android13-5.15-lts 29d153aabd54 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/01 21:39 android13-5.15-lts 29d153aabd54 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/09/01 18:17 android13-5.15-lts 29d153aabd54 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in x64_sys_call
2024/09/01 18:12 android13-5.15-lts 29d153aabd54 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in x64_sys_call
2024/09/01 08:40 android13-5.15-lts 29d153aabd54 1eda0d14 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/08/27 08:55 android13-5.15-lts 29d153aabd54 9aee4e0b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/08/25 04:40 android13-5.15-lts 29d153aabd54 d7d32352 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
2024/08/24 10:55 android13-5.15-lts 29d153aabd54 d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in x64_sys_call
* Struck through repros no longer work on HEAD.