syzbot


BUG: soft lockup in tx

Status: auto-obsoleted due to no activity on 2023/12/03 12:31
Reported-by: syzbot+e66a5599d722c108a809@syzkaller.appspotmail.com
First crash: 427d, last: 304d
Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 BUG: soft lockup in tx (2) 1 142d 142d 0/3 auto-obsoleted due to no activity on 2024/05/12 18:08
upstream BUG: soft lockup in tx serial C 66 51d 645d 0/27 upstream: reported C repro on 2022/09/18 05:29
linux-4.14 BUG: soft lockup in tx C error 2 810d 989d 0/1 upstream: reported C repro on 2021/10/09 08:02
linux-4.19 BUG: soft lockup in tx C done 1 1025d 1055d 1/1 fixed on 2021/10/04 07:44
linux-6.1 BUG: soft lockup in tx (3) 1 2d10h 2d10h 0/3 upstream: reported on 2024/06/22 04:07
linux-5.15 BUG: soft lockup in tx 21 189d 441d 0/3 auto-obsoleted due to no activity on 2024/03/27 03:04
linux-5.15 INFO: rcu detected stall in tx 1 73d 73d 0/3 upstream: reported on 2024/04/12 14:07
upstream INFO: rcu detected stall in tx net C error unreliable 3 1024d 1162d 20/27 fixed on 2021/11/10 00:50
upstream INFO: rcu detected stall in tx (2) serial 79 790d 909d 0/27 auto-closed as invalid on 2022/08/24 07:21

Sample crash report:
watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [aoe_tx0:2050]
Modules linked in:
irq event stamp: 31583879
hardirqs last  enabled at (31583878): [<ffff8000122017ec>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (31583878): [<ffff8000122017ec>] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194
hardirqs last disabled at (31583879): [<ffff80001211d06c>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (31583879): [<ffff80001211d06c>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (5892): [<ffff80001040e5e0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (5896): [<ffff80001040e5ac>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
CPU: 1 PID: 2050 Comm: aoe_tx0 Not tainted 6.1.47-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
pc : _raw_spin_unlock_irqrestore+0x58/0xac kernel/locking/spinlock.c:194
lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
lr : _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194
sp : ffff8000230a77f0
x29: ffff8000230a77f0 x28: ffff0000e76902f0 x27: ffff0000e7690280
x26: ffff00011d56cca8 x25: ffff000120bee018 x24: 0000000000000000
x23: 0000000000000000 x22: dfff800000000000 x21: ffff0000cdc50fd8
x20: ffff800019c7bd70 x19: 0000000000000000 x18: ffff8000230a7500
x17: 0000000000000000 x16: ffff800008304af8 x15: 0000000000000000
x14: 1ffff00002b160b0 x13: dfff800000000000 x12: 0000000000000003
x11: ff8080000aacf728 x10: 0000000000000003 x9 : 0000000000000080
x8 : 00000000000000c0 x7 : ffff80000b64427c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000002 x1 : ffff80001227c340 x0 : ffff80019ed6e000
Call trace:
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
 _raw_spin_unlock_irqrestore+0x58/0xac kernel/locking/spinlock.c:194
 spin_unlock_irqrestore include/linux/spinlock.h:405 [inline]
 uart_write_room+0x158/0x2dc drivers/tty/serial/serial_core.c:615
 tty_write_room+0x6c/0x8c drivers/tty/tty_ioctl.c:80
 handle_tx+0x120/0x5f8 drivers/net/caif/caif_serial.c:226
 caif_xmit+0x108/0x150 drivers/net/caif/caif_serial.c:282
 __netdev_start_xmit include/linux/netdevice.h:4853 [inline]
 netdev_start_xmit include/linux/netdevice.h:4867 [inline]
 xmit_one net/core/dev.c:3595 [inline]
 dev_hard_start_xmit+0x25c/0x9a4 net/core/dev.c:3611
 __dev_queue_xmit+0x186c/0x38d8 net/core/dev.c:4261
 dev_queue_xmit include/linux/netdevice.h:3021 [inline]
 tx+0x90/0x134 drivers/block/aoe/aoenet.c:63
 kthread+0x1ac/0x374 drivers/block/aoe/aoecmd.c:1229
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/25 12:30 linux-6.1.y 802aacbbffe2 03d9c195 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: soft lockup in tx
2023/05/28 20:59 linux-6.1.y a343b0dd87b4 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: soft lockup in tx
2023/04/24 07:55 linux-6.1.y f17b0ab65d17 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: soft lockup in tx
* Struck through repros no longer work on HEAD.