BUG: soft lockup in tx (3)

Status: auto-obsoleted due to no activity on 2025/05/07 05:11
Reported-by: syzbot+d6bd41c234ff445adda8@syzkaller.appspotmail.com
First crash: 817d, last: 598d
▶ ▼ Similar bugs (11)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 BUG: soft lockup in tx (2) 1 1 958d 958d 0/3 auto-obsoleted due to no activity on 2024/05/12 18:08
upstream BUG: soft lockup in tx prio:low serial 1 syz, C 1195 73d 1460d 0/29 upstream: reported C repro on 2022/09/18 05:29
linux-4.14 BUG: soft lockup in tx 1 syz, C error 2 1625d 1804d 0/1 upstream: reported C repro on 2021/10/09 08:02
linux-4.19 BUG: soft lockup in tx 1 syz, C done 1 1840d 1870d 1/1 fixed on 2021/10/04 07:44
linux-5.15 BUG: soft lockup in tx (2) origin:upstream 1 syz, C error 41 26d 780d 0/3 upstream: reported C repro on 2024/07/29 04:22
linux-6.1 BUG: soft lockup in tx (4) origin:upstream missing-backport 1 syz, C error 38 7d11h 497d 0/3 upstream: reported C repro on 2025/05/08 06:14
linux-6.1 BUG: soft lockup in tx 1 3 1119d 1242d 0/3 auto-obsoleted due to no activity on 2023/12/03 12:31
linux-5.15 BUG: soft lockup in tx 1 21 1004d 1256d 0/3 auto-obsoleted due to no activity on 2024/03/27 03:04
linux-5.15 INFO: rcu detected stall in tx 1 1 888d 888d 0/3 auto-obsoleted due to no activity on 2024/07/21 14:08
upstream INFO: rcu detected stall in tx net 1 syz, C error unreliable 3 1839d 1977d 20/29 fixed on 2021/11/10 00:50
upstream INFO: rcu detected stall in tx (2) serial 1 79 1605d 1724d 0/29 auto-closed as invalid on 2022/08/24 07:21

Sample crash report:
watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [aoe_tx0:2060]
Modules linked in:
irq event stamp: 28586665
hardirqs last  enabled at (28586664): [<ffff8000124118e4>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (28586664): [<ffff8000124118e4>] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194
hardirqs last disabled at (28586665): [<ffff80001232b7f4>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (28586665): [<ffff80001232b7f4>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (1928): [<ffff8000106069d4>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1932): [<ffff8000106069a0>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
CPU: 1 PID: 2060 Comm: aoe_tx0 Not tainted 6.1.127-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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 : ffff800026f777f0
x29: ffff800026f777f0 x28: ffff0000cc0a8430 x27: ffff0000cc0a83c0
x26: ffff0000f9de2ca8 x25: ffff0000f5bb5018 x24: 0000000000000000
x23: 0000000000000000 x22: dfff800000000000 x21: ffff0000cda10fd8
x20: ffff80001cfe6a90 x19: 0000000000000000 x18: ffff800026f77500
x17: ffff800018b7d000 x16: ffff80000830159c x15: ffff80001865df80
x14: 1ffff00002b520b2 x13: dfff800000000000 x12: 0000000000000003
x11: 0000000000ff0100 x10: 0000000000000003 x9 : 0000000000000080
x8 : 00000000000000c0 x7 : ffff80000b704984 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000002 x1 : ffff80001248c5a0 x0 : ffff80019e31d000
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_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:4888 [inline]
 netdev_start_xmit include/linux/netdevice.h:4902 [inline]
 xmit_one net/core/dev.c:3627 [inline]
 dev_hard_start_xmit+0x25c/0x9a4 net/core/dev.c:3643
 __dev_queue_xmit+0x161c/0x34d0 net/core/dev.c:4303
 dev_queue_xmit include/linux/netdevice.h:3043 [inline]
 tx+0x9c/0x1c8 drivers/block/aoe/aoenet.c:63
 kthread+0x1ac/0x374 drivers/block/aoe/aoecmd.c:1237
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/27 05:11 linux-6.1.y 75cefdf153f5 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: soft lockup in tx
2024/12/10 17:11 linux-6.1.y e4d90d63d385 cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: soft lockup in tx
2024/09/04 05:03 linux-6.1.y 311d8503ef9f 326f9c5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: soft lockup in tx
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.