syzbot


BUG: soft lockup in tx (3)

Status: upstream: reported on 2024/06/22 04:07
Reported-by: syzbot+d6bd41c234ff445adda8@syzkaller.appspotmail.com
First crash: 28d, last: 28d
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 168d 168d 0/3 auto-obsoleted due to no activity on 2024/05/12 18:08
upstream BUG: soft lockup in tx serial C 67 15d 671d 0/27 upstream: reported C repro on 2022/09/18 05:29
linux-4.14 BUG: soft lockup in tx C error 2 835d 1014d 0/1 upstream: reported C repro on 2021/10/09 08:02
linux-4.19 BUG: soft lockup in tx C done 1 1050d 1080d 1/1 fixed on 2021/10/04 07:44
linux-6.1 BUG: soft lockup in tx 3 329d 453d 0/3 auto-obsoleted due to no activity on 2023/12/03 12:31
linux-5.15 BUG: soft lockup in tx 21 215d 467d 0/3 auto-obsoleted due to no activity on 2024/03/27 03:04
linux-5.15 INFO: rcu detected stall in tx 1 98d 98d 0/3 upstream: reported on 2024/04/12 14:07
upstream INFO: rcu detected stall in tx net C error unreliable 3 1050d 1188d 20/27 fixed on 2021/11/10 00:50
upstream INFO: rcu detected stall in tx (2) serial 79 816d 934d 0/27 auto-closed as invalid on 2022/08/24 07:21

Sample crash report:
watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [aoe_tx0:2050]
Modules linked in:
irq event stamp: 32805801
hardirqs last  enabled at (32805800): [<ffff80001223f57c>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (32805800): [<ffff80001223f57c>] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194
hardirqs last disabled at (32805801): [<ffff80001215b58c>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (32805801): [<ffff80001215b58c>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (3486): [<ffff800010448274>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (3490): [<ffff800010448240>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
CPU: 0 PID: 2050 Comm: aoe_tx0 Not tainted 6.1.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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 : ffff800023fa77d0
x29: ffff800023fa77d0 x28: 1fffe0001dff22c0 x27: ffff0000cda30c30
x26: ffff0000eff91600 x25: ffff0000cda30fd0 x24: ffff0000f48050b0
x23: 0000000000000020 x22: 0000000000000002 x21: 0000000000000000
x20: ffff800019c2c790 x19: 0000000000000000 x18: ffff800023fa7500
x17: ffff8000188df000 x16: ffff8000083052a8 x15: ffff8000183c4f80
x14: 1ffff00002b0a0b0 x13: dfff800000000000 x12: 0000000000000003
x11: 0000000000ff0100 x10: 0000000000000003 x9 : 0000000000000080
x8 : 00000000000000c0 x7 : ffff80000b6599bc x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000002 x1 : ffff8000122bc6e0 x0 : ffff80019ebb4000
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:406 [inline]
 uart_write+0x358/0x878 drivers/tty/serial/serial_core.c:582
 handle_tx+0x1f4/0x5f8 drivers/net/caif/caif_serial.c:236
 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:3627 [inline]
 dev_hard_start_xmit+0x25c/0x9a4 net/core/dev.c:3643
 __dev_queue_xmit+0x186c/0x38d8 net/core/dev.c:4293
 dev_queue_xmit include/linux/netdevice.h:3021 [inline]
 tx+0x9c/0x1c8 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:864

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/22 04:06 linux-6.1.y eb44d83053d6 edc5149a .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.