Exception at net/ipv4/tcp_output.c:2026 tcp_send_loss_probe

[Unknown78]

Backgrounds

Device: Samsung Galaxy Note 4 SM-N910H
Architecture: armeabi-v7a
OS Version: Android Nougat 7.1.1 (API 25)

System:

• REFINED_NOTE8_7.1_T2.zip
• Konup_RisingNote4_for_RefinedNote8_7.1.1_ver.2.3.zip
• Konup_HomeOneUI_RefinedNote8_7.1.1_ver.2.0_14.07.2022.zip
• Konup_SamsungCamera7_RefinedNote8_7.1.1_v.1.2.zip
• ModemServiceMode_RefinedNote8_7.1.1.zip

Boot:

• Helios_Kernel-V3.2-N910C.H-20240107.zip
• Magisk debug 27001_3d91a561

Bootloader:

• Stock BL_N910HXXS2DQH5_CL7284779_QB14688583_REV00_user_low_ship.tar.md5

Modem:

• Stock CP_N910HXXU1DPD2_CL7284779_QB9293075_REV00_user_low_ship.tar.md5

Partition Table:

• Stock TRE3G_EUR_OPEN_SEA.pit
  Viewer PIT_Viewer_v1.04.7z

Recovery:

• TWRP-3.7.0_9-treltexx-20240127_Unknown78-Tar.zip

Problems

This crash happened on 14th February, 2024, the phone freeze and restart itself once.
Just daily drive as usual, eventually you got this.

There's at least the same 42 exceptions in that log.
My uptime is 620k seconds, around 7 days, which means there may be hundreds of the same exception already.
I couldn't log others because the phone already reboot itself.

The issue seems to be related to TCP, so it is internet thing?
Just to remember that I was using 4G Lock Band 1 at that time, mobile data is turned on, it's active.

P.S. After the crash reboot my SIM card went invalid/undetected, then I reboot again, and it's fine.
P.S. It might be the rare crash that caused invalid SIM card since I use this ROM.

Might be related:
https://bugzilla.kernel.org/show_bug.cgi?id=204879
https://www.spinics.net/lists/netdev/msg495579.html
https://forums.developer.nvidia.com/t/iwlwifi-trace-log-and-kernel-panic/278249
https://patchwork.ozlabs.org/project/netdev/patch/20190223235151.168283-1-edumazet@google.com/
https://lists.openwall.net/linux-kernel/2018/12/14/793

Logs

last_kmsg_2024-02-14T09.25.11.log

Highlights

<4>[617806.419516] [c2] ------------[ cut here ]------------
<4>[617806.419573] [c2] WARNING: at net/ipv4/tcp_output.c:2026 tcp_send_loss_probe+0x174/0x190()
<4>[617806.419597] [c2] Modules linked in:
<4>[617806.419638] [c2] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G        W    3.10.108-Helios_Kernel-V3.2-N910C.H-20240107 #1
<4>[617806.419707] [c2] [<c0014c18>] (unwind_backtrace+0x0/0xec) from [<c0011af0>] (show_stack+0x10/0x14)
<4>[617806.419758] [c2] [<c0011af0>] (show_stack+0x10/0x14) from [<c002c258>] (warn_slowpath_common+0x54/0x6c)
<4>[617806.419805] [c2] [<c002c258>] (warn_slowpath_common+0x54/0x6c) from [<c002c30c>] (warn_slowpath_null+0x1c/0x24)
<4>[617806.419849] [c2] [<c002c30c>] (warn_slowpath_null+0x1c/0x24) from [<c07481f4>] (tcp_send_loss_probe+0x174/0x190)
<4>[617806.419896] [c2] [<c07481f4>] (tcp_send_loss_probe+0x174/0x190) from [<c074a350>] (tcp_write_timer_handler+0x94/0x1a0)
<4>[617806.419939] [c2] [<c074a350>] (tcp_write_timer_handler+0x94/0x1a0) from [<c074a488>] (tcp_write_timer+0x2c/0x94)
<4>[617806.419986] [c2] [<c074a488>] (tcp_write_timer+0x2c/0x94) from [<c0039258>] (call_timer_fn+0x38/0xd0)
<4>[617806.420033] [c2] [<c0039258>] (call_timer_fn+0x38/0xd0) from [<c0039d7c>] (run_timer_softirq+0x180/0x1fc)
<4>[617806.420078] [c2] [<c0039d7c>] (run_timer_softirq+0x180/0x1fc) from [<c0033e04>] (__do_softirq+0x128/0x290)
<4>[617806.420118] [c2] [<c0033e04>] (__do_softirq+0x128/0x290) from [<c0034034>] (do_softirq+0x50/0x58)
<4>[617806.420156] [c2] [<c0034034>] (do_softirq+0x50/0x58) from [<c00342f4>] (irq_exit+0xa0/0xd4)
<4>[617806.420198] [c2] [<c00342f4>] (irq_exit+0xa0/0xd4) from [<c000e8e4>] (handle_IRQ+0x44/0x90)
<4>[617806.420240] [c2] [<c000e8e4>] (handle_IRQ+0x44/0x90) from [<c000847c>] (gic_handle_irq+0x2c/0x5c)
<4>[617806.420280] [c2] [<c000847c>] (gic_handle_irq+0x2c/0x5c) from [<c000dbc0>] (__irq_svc+0x40/0x70)
<4>[617806.420307] [c2] Exception stack(0xe69eff58 to 0xe69effa0)
<4>[617806.420337] [c2] ff40:                                                       e69effa0 3b9aca00
<4>[617806.420373] [c2] ff60: 439caa86 000231e4 c3b603a8 c0e60f18 3fa7a848 000231e4 00000003 00000000
<4>[617806.420409] [c2] ff80: e69ee000 00000000 0000001a e69effa0 00000006 c05c1d44 00000153 ffffffff
<4>[617806.420455] [c2] [<c000dbc0>] (__irq_svc+0x40/0x70) from [<c05c1d44>] (cpuidle_enter_state+0x50/0xe4)
<4>[617806.420499] [c2] [<c05c1d44>] (cpuidle_enter_state+0x50/0xe4) from [<c05c1e98>] (cpuidle_idle_call+0xc0/0x16c)
<4>[617806.420541] [c2] [<c05c1e98>] (cpuidle_idle_call+0xc0/0x16c) from [<c000eff0>] (arch_cpu_idle+0x8/0x38)
<4>[617806.420588] [c2] [<c000eff0>] (arch_cpu_idle+0x8/0x38) from [<c006ee38>] (cpu_startup_entry+0x100/0x144)
<4>[617806.420631] [c2] [<c006ee38>] (cpu_startup_entry+0x100/0x144) from [<2083dc44>] (0x2083dc44)
<4>[617806.420659] [c2] ---[ end trace 47ae6a875dcc4d0a ]---