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BUG: soft lockup in sys_bind

Status: premoderation: reported on 2025/09/02 00:10
Reported-by: syzbot+c7b1139d17d511d0f31c@syzkaller.appspotmail.com
First crash: 3d02h, last: 3d02h
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 BUG: soft lockup in sys_bind 1 1 1331d 1331d 0/1 auto-closed as invalid on 2022/05/12 15:23
upstream BUG: soft lockup in sys_bind trace bpf 1 1 71d 67d 0/29 moderation: reported on 2025/06/29 03:21
upstream INFO: rcu detected stall in sys_bind (2) crypto 1 1 1359d 1359d 0/29 closed as invalid on 2022/02/08 10:10
upstream INFO: rcu detected stall in sys_bind (3) sctp 1 1 515d 515d 0/29 auto-obsoleted due to no activity on 2024/07/07 00:44
linux-5.15 INFO: rcu detected stall in sys_bind 1 1 401d 401d 0/3 auto-obsoleted due to no activity on 2024/11/07 23:03
upstream INFO: rcu detected stall in sys_bind (4) mm 1 4 263d 334d 0/29 auto-obsoleted due to no activity on 2025/03/15 08:54

Sample crash report:
watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.2.1337:5301]
Modules linked in:
CPU: 0 PID: 5301 Comm: syz.2.1337 Not tainted 5.10.240-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025
RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
RIP: 0010:kvm_wait+0xc2/0x120 arch/x86/kernel/kvm.c:926
Code: 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d ff 98 98 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d f0 98 98 03 fb f4 <4c> 89 64 24 18 ff 74 24 18 9d 48 c7 44 24 20 0e 36 e0 45 4b c7 04
RSP: 0018:ffffc9000132fa00 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff88810bc54a88 RCX: ffffffff814b22ca
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88810bc54a88
RBP: ffffc9000132fab0 R08: dffffc0000000000 R09: ffffed102178a952
R10: ffffed102178a952 R11: 1ffff1102178a951 R12: 0000000000000246
R13: 1ffff1102178a951 R14: dffffc0000000000 R15: 1ffff92000265f44
FS:  00007faa34a066c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffffd CR3: 0000000132574000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x714/0xb70 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
 queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock include/linux/spinlock.h:183 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0xd8/0xe0 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 lock_sock_nested+0x92/0x290 net/core/sock.c:3117
 lock_sock include/net/sock.h:1648 [inline]
 tipc_bind+0x4c/0x2f0 net/tipc/socket.c:671
 __sys_bind+0x2f9/0x400 net/socket.c:1665
 __do_sys_bind net/socket.c:1676 [inline]
 __se_sys_bind net/socket.c:1674 [inline]
 __x64_sys_bind+0x7a/0x90 net/socket.c:1674
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7faa35fbebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faa34a06038 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 00007faa361f6090 RCX: 00007faa35fbebe9
RDX: 000000000000001c RSI: 0000200000000640 RDI: 0000000000000005
RBP: 00007faa36041e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faa361f6128 R14: 00007faa361f6090 R15: 00007ffdfc1352a8
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5296 Comm: syz.2.1337 Not tainted 5.10.240-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x5c/0x60 kernel/kcov.c:207
Code: b8 0a 00 00 83 fa 02 75 21 48 8b 91 c0 0a 00 00 48 8b 32 48 8d 7e 01 8b 89 bc 0a 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 3a <5d> c3 66 90 55 48 89 e5 48 8b 45 08 65 48 8b 15 a0 cc 9e 7e 65 8b
RSP: 0018:ffffc90001cde9b0 EFLAGS: 00000246
RAX: ffffffff845d03f2 RBX: 0000000000000030 RCX: 0000000000080000
RDX: ffffc9000254f000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90001cde9b0 R08: 0000000000000004 R09: 0000000000000003
R10: fffff5200039bd48 R11: 1ffff9200039bd48 R12: 0000000000000000
R13: ffff8881262d8004 R14: 00000000cca24aba R15: ffff8881262c90de
FS:  00007faa34a276c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000132574000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rht_bucket include/linux/rhashtable.h:290 [inline]
 __rhashtable_lookup include/linux/rhashtable.h:597 [inline]
 rhashtable_lookup include/linux/rhashtable.h:638 [inline]
 tipc_sk_lookup+0x212/0x5f0 net/tipc/socket.c:2997
 tipc_sk_rcv+0x3eb/0x1ef0 net/tipc/socket.c:2488
 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674
 tipc_node_xmit_skb+0xe9/0x130 net/tipc/node.c:1739
 tipc_sk_rcv+0x1d77/0x1ef0 net/tipc/socket.c:2518
 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674
 tipc_sk_push_backlog net/tipc/socket.c:1306 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2253 [inline]
 tipc_sk_filter_rcv+0x1581/0x3850 net/tipc/socket.c:2362
 tipc_sk_enqueue net/tipc/socket.c:2442 [inline]
 tipc_sk_rcv+0x7cc/0x1ef0 net/tipc/socket.c:2493
 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674
 tipc_node_xmit_skb net/tipc/node.c:1739 [inline]
 tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1754
 tipc_sk_backlog_rcv+0x16f/0x1f0 net/tipc/socket.c:2410
 sk_backlog_rcv include/net/sock.h:1052 [inline]
 __release_sock+0x146/0x360 net/core/sock.c:2583
 release_sock+0x60/0x1b0 net/core/sock.c:3134
 tipc_release+0xbd4/0x1490 net/tipc/socket.c:639
 __sock_release net/socket.c:597 [inline]
 sock_close+0xe0/0x270 net/socket.c:1286
 __fput+0x2fb/0x770 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 syscall_exit_to_user_mode+0x68/0x90 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7faa35fbebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faa34a27038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 00000000000203a0 RBX: 00007faa361f5fa0 RCX: 00007faa35fbebe9
RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000005
RBP: 00007faa36041e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faa361f6038 R14: 00007faa361f5fa0 R15: 00007ffdfc1352a8

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/02 00:09 android13-5.10-lts 1154f779f3f3 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: soft lockup in sys_bind
* Struck through repros no longer work on HEAD.