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BUG: soft lockup in tx (2)

Status: upstream: reported C repro on 2024/07/29 04:22
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+28e249180560494c25e8@syzkaller.appspotmail.com
First crash: 352d, last: 9d19h
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2024/11/07 upstream (ToT) ff7afaeca1a1 C [report] BUG: soft lockup in ser_release
▶ ▼ 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 529d 529d 0/3 auto-obsoleted due to no activity on 2024/05/12 18:08
upstream BUG: soft lockup in tx serial 1 C 96 4d03h 1032d 0/29 upstream: reported C repro on 2022/09/18 05:29
linux-4.14 BUG: soft lockup in tx 1 C error 2 1197d 1376d 0/1 upstream: reported C repro on 2021/10/09 08:02
linux-4.19 BUG: soft lockup in tx 1 C done 1 1412d 1442d 1/1 fixed on 2021/10/04 07:44
linux-6.1 BUG: soft lockup in tx (4) origin:upstream 1 C 10 8d16h 69d 0/3 upstream: reported C repro on 2025/05/08 06:14
linux-6.1 BUG: soft lockup in tx (3) 1 4 170d 389d 0/3 auto-obsoleted due to no activity on 2025/05/07 05:11
linux-6.1 BUG: soft lockup in tx 1 3 691d 814d 0/3 auto-obsoleted due to no activity on 2023/12/03 12:31
linux-5.15 BUG: soft lockup in tx 1 21 576d 828d 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 459d 459d 0/3 auto-obsoleted due to no activity on 2024/07/21 14:08
upstream INFO: rcu detected stall in tx net 1 C error unreliable 3 1411d 1549d 20/29 fixed on 2021/11/10 00:50
upstream INFO: rcu detected stall in tx (2) serial 1 79 1177d 1296d 0/29 auto-closed as invalid on 2022/08/24 07:21
▶ ▼ Last patch testing requests (8)
Created Duration User Patch Repo Result
2025/07/06 18:18 19m retest repro linux-5.15.y report log
2025/07/06 18:14 13m retest repro linux-5.15.y report log
2025/05/04 19:37 15m retest repro linux-5.15.y report log
2025/05/04 19:37 1h14m retest repro linux-5.15.y report log
2025/05/04 19:37 12m retest repro linux-5.15.y report log
2025/05/04 19:37 12m retest repro linux-5.15.y report log
2025/05/04 19:37 17m retest repro linux-5.15.y report log
2025/04/15 17:34 12m retest repro linux-5.15.y report log

Sample crash report:
watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [aoe_tx0:2055]
Modules linked in:
irq event stamp: 20859515
hardirqs last  enabled at (20859514): [<ffff800011b8f340>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
hardirqs last  enabled at (20859514): [<ffff800011b8f340>] _raw_spin_unlock_irqrestore+0xac/0x158 kernel/locking/spinlock.c:194
hardirqs last disabled at (20859515): [<ffff800011ab7110>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (956): [<ffff80000feeb854>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (960): [<ffff80000feeb820>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
CPU: 1 PID: 2055 Comm: aoe_tx0 Not tainted 5.15.173-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:161 [inline]
pc : _raw_spin_unlock_irqrestore+0xbc/0x158 kernel/locking/spinlock.c:194
lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
lr : _raw_spin_unlock_irqrestore+0xac/0x158 kernel/locking/spinlock.c:194
sp : ffff800025c17820
x29: ffff800025c17830 x28: ffff0000cdd3f430 x27: ffff0000cdd3f3c0
x26: ffff0000c8258ca8 x25: ffff0000caeb0018 x24: 0000000000000000
x23: dfff800000000000 x22: ffff80000b472edc x21: ffff80001ba5fe80
x20: ffff80001ba5fe68 x19: 0000000000000000 x18: ffff800025c17540
x17: 0000000000000000 x16: ffff8000082ec8b8 x15: 000000000000bea1
x14: 1ffff0000295806a x13: dfff800000000000 x12: 0000000000000003
x11: 0000000000000202 x10: 0000000000000003 x9 : 0000000000000080
x8 : 00000000000000c0 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff80000804605c
x2 : 0000000000000002 x1 : ffff800011c0ad00 x0 : ffff80019f79b000
Call trace:
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irqrestore+0xbc/0x158 kernel/locking/spinlock.c:194
 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline]
 uart_write_room+0x168/0x300 drivers/tty/serial/serial_core.c:605
 tty_write_room+0x6c/0x8c drivers/tty/tty_ioctl.c:79
 handle_tx+0x124/0x644 drivers/net/caif/caif_serial.c:226
 caif_xmit+0x10c/0x160 drivers/net/caif/caif_serial.c:282
 __netdev_start_xmit include/linux/netdevice.h:5019 [inline]
 netdev_start_xmit include/linux/netdevice.h:5033 [inline]
 xmit_one net/core/dev.c:3617 [inline]
 dev_hard_start_xmit+0x2bc/0x92c net/core/dev.c:3633
 __dev_queue_xmit+0x1378/0x2ac8 net/core/dev.c:4256
 dev_queue_xmit+0x24/0x34 net/core/dev.c:4289
 tx+0x94/0x1cc drivers/block/aoe/aoenet.c:63
 kthread+0x1ac/0x374 drivers/block/aoe/aoecmd.c:1238
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870

Crashes (25):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/25 02:09 linux-5.15.y 0a51d2d4527b 68da6d95 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2024/11/24 13:46 linux-5.15.y 0a51d2d4527b 68da6d95 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2024/11/24 10:30 linux-5.15.y 0a51d2d4527b 68da6d95 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2024/11/24 07:09 linux-5.15.y 0a51d2d4527b 68da6d95 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2024/11/24 04:08 linux-5.15.y 0a51d2d4527b 68da6d95 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2024/10/11 18:31 linux-5.15.y 3a5928702e71 cd942402 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2025/06/21 22:49 linux-5.15.y 1c700860e8bc d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2025/06/20 09:35 linux-5.15.y 1c700860e8bc ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2025/03/02 23:05 linux-5.15.y c16c81c81336 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2025/01/06 21:22 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2025/01/06 00:20 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2024/10/11 07:02 linux-5.15.y 3a5928702e71 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2024/07/29 04:21 linux-5.15.y 7e89efd3ae1c 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: soft lockup in tx
2025/06/16 19:16 linux-5.15.y 1c700860e8bc d1716036 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/06/14 23:05 linux-5.15.y 1c700860e8bc 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/06/14 23:02 linux-5.15.y 1c700860e8bc 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/06/14 21:44 linux-5.15.y 1c700860e8bc 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/06/14 21:43 linux-5.15.y 1c700860e8bc 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/06/05 03:53 linux-5.15.y 1c700860e8bc 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/06/05 03:52 linux-5.15.y 1c700860e8bc 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/05/25 03:46 linux-5.15.y 98f47d0e9b8c ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/05/20 16:20 linux-5.15.y a68c15152131 b47f9e02 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/05/20 16:19 linux-5.15.y a68c15152131 b47f9e02 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/04/01 06:45 linux-5.15.y 0c935c049b5c 36d76a97 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
2025/03/21 13:17 linux-5.15.y 0c935c049b5c 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in tx
* Struck through repros no longer work on HEAD.