syzbot


BUG: soft lockup in bind (2)

Status: upstream: reported on 2022/10/19 20:49
Reported-by: syzbot+da19d6aba3e589d067c2@syzkaller.appspotmail.com
First crash: 614d, last: 513d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 BUG: soft lockup in bind 11 785d 922d 0/1 auto-obsoleted due to no activity on 2022/08/29 14:09
linux-4.14 INFO: rcu detected stall in bind 12 1133d 1366d 0/1 auto-closed as invalid on 2021/09/15 00:37

Sample crash report:
watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:17462]
Modules linked in:
irq event stamp: 9872
hardirqs last  enabled at (9871): [<ffffffff812317db>] kvm_wait arch/x86/kernel/kvm.c:600 [inline]
hardirqs last  enabled at (9871): [<ffffffff812317db>] kvm_wait+0x14b/0x240 arch/x86/kernel/kvm.c:580
hardirqs last disabled at (9872): [<ffffffff87401a1e>] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:796
softirqs last  enabled at (432): [<ffffffff8760068b>] __do_softirq+0x68b/0x9ff kernel/softirq.c:314
softirqs last disabled at (205): [<ffffffff81322d33>] invoke_softirq kernel/softirq.c:368 [inline]
softirqs last disabled at (205): [<ffffffff81322d33>] irq_exit+0x193/0x240 kernel/softirq.c:409
CPU: 0 PID: 17462 Comm: syz-executor.4 Not tainted 4.14.304-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
task: ffff88809d30a2c0 task.stack: ffff8880a2158000
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
RSP: 0018:ffff8880a215fb20 EFLAGS: 000002c2 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff11e13dc RBX: ffffffff89dda46c RCX: 1ffff11013a61577
RDX: dffffc0000000000 RSI: ffff88809d30ab98 RDI: ffff88809d30ab44
RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000282
R13: dffffc0000000000 R14: ffffffff89dda46d R15: ffffed10174869f8
FS:  00007f25742fd700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555561f3708 CR3: 00000000a2086000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
 kvm_wait arch/x86/kernel/kvm.c:600 [inline]
 kvm_wait+0x179/0x240 arch/x86/kernel/kvm.c:580
 pv_wait arch/x86/include/asm/paravirt.h:679 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:447 [inline]
 __pv_queued_spin_lock_slowpath+0x722/0x910 kernel/locking/qspinlock.c:465
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:669 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:52 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:90 [inline]
 queued_read_lock_slowpath+0x150/0x190 kernel/locking/qrwlock.c:90
 hci_send_to_channel+0x3c/0x200 net/bluetooth/hci_sock.c:272
 hci_send_monitor_ctrl_event+0x3dd/0x500 net/bluetooth/hci_sock.c:402
 mgmt_send_event+0x2b3/0x330 net/bluetooth/mgmt_util.c:86
 mgmt_index_event net/bluetooth/mgmt.c:256 [inline]
 mgmt_index_removed+0x200/0x240 net/bluetooth/mgmt.c:6600
 hci_sock_bind+0xe00/0x12b0 net/bluetooth/hci_sock.c:1186
 SYSC_bind net/socket.c:1489 [inline]
 SyS_bind+0x174/0x1f0 net/socket.c:1475
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f2575d8b0c9
RSP: 002b:00007f25742fd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 00007f2575eaaf80 RCX: 00007f2575d8b0c9
RDX: 0000000000000006 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007f2575de6ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe9d8d921f R14: 00007f25742fd300 R15: 0000000000022000
Code: 34 5a fa e9 4f ff ff ff 48 89 ef e8 3d 34 5a fa eb 93 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 0f 00 2d a4 b3 62 00 fb f4 <c3> 90 0f 1f 44 00 00 0f 00 2d 94 b3 62 00 f4 c3 90 90 41 55 41 
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 17449 Comm: syz-executor.3 Not tainted 4.14.304-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
task: ffff8880910c25c0 task.stack: ffff88809d678000
RIP: 0010:__read_once_size include/linux/compiler.h:185 [inline]
RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:queued_write_lock_slowpath+0xcb/0x1d0 kernel/locking/qrwlock.c:139
RSP: 0018:ffff88809d67fd10 EFLAGS: 00000206
RAX: 0000000000000101 RBX: ffffffff89dda468 RCX: 0000000000001c7e
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff89dda468
RBP: ffffffff89dda46c R08: ffffffff8b9b2ef0 R09: 0000000000040592
R10: ffff8880910c2e98 R11: ffff8880910c25c0 R12: 0000000000000003
R13: fffffbfff13bb48d R14: 00000000000000ff R15: ffff88809c82b5d0
FS:  0000555556238400(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdefbe0fe68 CR3: 000000007fb6b000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 queued_write_lock include/asm-generic/qrwlock.h:134 [inline]
 do_raw_write_lock+0xc2/0x1d0 kernel/locking/spinlock_debug.c:203
 bt_sock_unlink+0x1d/0x170 net/bluetooth/af_bluetooth.c:151
 hci_sock_release+0xc1/0x4c0 net/bluetooth/hci_sock.c:855
 __sock_release+0xcd/0x2b0 net/socket.c:602
 sock_close+0x15/0x20 net/socket.c:1139
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fdefbd72f7b
RSP: 002b:00007fff2069a860 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007fdefbd72f7b
RDX: ffffffffffffffb8 RSI: ffffffffffffffff RDI: 0000000000000004
RBP: 00007fdefbee2980 R08: 0000000000000000 R09: 00007fdefb935000
R10: 00007fdefb9352d8 R11: 0000000000000293 R12: 000000000021081c
R13: 00007fff2069a960 R14: 00007fdefbee0f80 R15: 0000000000000032
Code: 75 dc 49 89 dd 49 89 dc 41 be ff 00 00 00 49 c1 ed 03 41 83 e4 07 48 b8 00 00 00 00 00 fc ff df 49 01 c5 41 83 c4 03 eb 02 f3 90 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 9e 00 00 00 8b 03 83 

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/01/28 09:06 linux-4.14.y 3949d1610004 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: soft lockup in bind
2022/10/19 20:49 linux-4.14.y 9d5c0b3a8e1a b31320fc .config console log report info [disk image] [vmlinux] ci2-linux-4-14 BUG: soft lockup in bind
* Struck through repros no longer work on HEAD.