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May 12, 2021
The code uses get_mtd_device_nm() which must be followed by a call to put_mtd_device() once the handle is no longer used. This fixes spurious shutdown console messages such as: [ 83.099037] Removing MTD device #1 (hard_config) with use count 1 Reported-by: Koen Vandeputte <koen.vandeputte@ncentric.com> Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com> Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org> [Backported from master] Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
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Oct 23, 2021
ag71xx_probe is registering ag71xx_interrupt as handler for the gmac0/gmac1 interrupts. The handler is trying to use napi_schedule to handle the processing of packets. But the netif_napi_add for this device is called a lot later in ag71xx_probe. It can therefore happen that a still running gmac0/gmac1 is triggering the interrupt handler with a bit from AG71XX_INT_POLL set in AG71XX_REG_INT_STATUS. The handler will then call napi_schedule and the napi code will crash the system because the ag->napi is not yet initialized: libphy: Fixed MDIO Bus: probed CPU 0 Unable to handle kernel paging request at virtual address 00000000, epc == 00000000, ra == 8137340 Oops[#1]: CPU: 0 PID: 1 Comm: swapper Not tainted 5.4.152 #0 $ 0 : 00000000 00000001 00000000 8280bf28 $ 4 : 82a98cb0 00000000 81620000 00200140 $ 8 : 00000000 00000000 74657272 7570743a $12 : 0000005b 8280bdb9 ffffffff ffffffff $16 : 00000001 82a98cb0 00000000 8280bf27 $20 : 8280bf28 81620000 ffff8b00 8280bf30 $24 : 00000000 8125af9c $28 : 82828000 8280bed8 81610000 8137340 Hi : 00005fff Lo : 2e48f657 epc : 00000000 0x0 ra : 8137340 __napi_poll+0x3c/0x11c Status: 1100dc03 KERNEL EXL IE Cause : 00800008 (ExcCode 02) BadVA : 00000000 PrId : 00019750 (MIPS 74Kc) Modules linked in: Process swapper (pid: 1, threadinfo=(ptrval), task=(ptrval), tls=00000000) Stack : ffff8afb ffff8afa 81620000 00200140 00000000 82a98cb0 00000008 0000012c 81625620 81373684 ffffffff ffffffff ffffffef 00000008 816153d8 81620000 815b0d60 815bbd54 00000000 81753700 8280bf28 8280bf28 8280bf30 8280bf30 81753748 00000008 0000000 00000004 0000000c 00000100 3fffffff 8175373c 816059f0 814ddb48 00000001 8160ab30 81615488 810618bc 00000006 00000000 ... Call Trace: [<81373684>] net_rx_action+0xfc/0x26c [<814ddb48>] __do_softirq+0x118/0x2ec [<810618bc>] handle_percpu_irq+0x50/0x80 [<8125ab8c>] plat_irq_dispatch+0x94/0xc8 [<81004e98>] handle_int+0x138/0x144 Code: (Bad address in epc) ---[ end trace a60d797432b656b2 ]--- The gmcc0/gmac1 must be brought in a state in which it doesn't signal a AG71XX_INT_POLL related status bits as interrupt before registering the interrupt handler. ag71xx_hw_start will take care of re-initializing the AG71XX_REG_INT_ENABLE. Fixes: f529a37 ("surprise :p") Signed-off-by: Sven Eckelmann <sven@narfation.org>
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Nov 28, 2021
Martin Kennedy reported: |Presently, I get this kernel panic on mpc85xx (Aerohive HiveAP 370) |on OpenWrt 'master' which occurs right as the second processor is |initialized: | |[ 0.478804] rcu: Hierarchical SRCU implementation. |[ 0.535569] dyndbg: Ignore empty _ddebug table in a CONFIG_DYNAMIC_DEBUG_CORE build |[ 0.627233] smp: Bringing up secondary CPUs ... |[ 0.681659] kernel tried to execute user page (0) - exploit attempt? (uid: 0) |[ 0.766618] BUG: Unable to handle kernel instruction fetch (NULL pointer?) |[ 0.848899] Faulting instruction address: 0x00000000 |[ 0.908273] Oops: Kernel access of bad area, sig: 11 [#1] |[ 0.972851] BE PAGE_SIZE=4K SMP NR_CPUS=2 P1020 RDB |[ 1.031179] Modules linked in: |[ 1.067640] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.10.80 #0 |[ 1.139507] NIP: 00000000 LR: c0021d2c CTR: 00000000 |[ 1.199921] REGS: c1051cf0 TRAP: 0400 Not tainted (5.10.80) |[...] |[ 1.758220] NIP [00000000] 0x0 |[ 1.794688] LR [c0021d2c] smp_85xx_kick_cpu+0xe8/0x568 |[ 1.856126] Call Trace: |[ 1.885295] [c1051da8] [c0021cb8] smp_85xx_kick_cpu+0x74/0x568 (unreliable) |[ 1.968633] [c1051de8] [c0011460] __cpu_up+0xc0/0x228 |[ 2.029038] [c1051e18] [c0031bbc] bringup_cpu+0x30/0x224 |[ 2.092572] [c1051e48] [c0031f3c] cpu_up.constprop.0+0x180/0x33c |[..] |[ 2.727952] ---[ end trace 9b796a4bafb6bc14 ]--- |[ 3.800879] Kernel panic - not syncing: Fatal exception |[ 3.862353] Rebooting in 1 seconds.. |[ 5.905097] System Halted, OK to turn off power | |I bisected this down to commit 3ae5da5 ("kernel: bump 5.10 to 5.10.80"); |that is, I don't get the panic right before this commit, but I do after. He reported the issue upstream and Xiaoming Ni from huawei came up with the patch (that is on it's way to upstream). While the AP370 is not in Openwrt, this will likely affect other SMP P1020 devices OpenWrt ships with: like the AP330, Enterasys WS-AP3710i, etc. Reported-by: Martin Kennedy <hurricos@gmail.com> Tested-by: Martin Kennedy <hurricos@gmail.com> Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
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Dec 5, 2021
Zbtlink ZBT-WG1602 is a Wi-Fi router intendent to use with WWAN
(UMTS/LTE/3G/4G) modems. The router board offsers a couple of miniPCIe
slots with USB and SIM only and another one pure miniPCIe slot as well
as five Gigabit Ethernet ports (4xLAN + WAN).
Specification:
* SoC: MT7621A
* RAM: 256/512 MiB
* Flash: 16/32 MiB (SPI NOR)
* external watchdog (looks like Torexsemi XC6131B)
* Eth: 10/100/1000 Mbps Ethernet x5 ports (4xLAN + WAN)
* WLAN 2GHz: MT7603EN (.11n, MIMO 2x2)
* WLAN 5GHz: MT7612EN (.11ac, MIMO 2x2)
* WLAN Ants: detachable x2, shared by 2GHz & 5GHz radios
* miniPCIe: 2x slots with USB&SIM + 1x slot with regular PCIe bus
* WWAN Ants: detachable x4
* External storage: microSD (SDXC) slot
* USB: 2.0 Type-A port
* LED: 11 (5 per Eth phy, 3 SoC controlled, 2 WLAN 2/5 controlled, 1
power indicator)
* Button: 1 (reset)
* UART: console (115200 baud)
* Power: DC jack (12 V / 2.5 A)
Additional HW information:
* SoC USB port #1 is shared by internal miniPCIe slot and external
Type-A USB port, USB D+/D- lines are toggled between ports using a
GPIO controlled DPDT switch.
* Power of the USB enabled miniPCIe slots can be individually controlled
using dedicated GPIO lines.
* Vendor firmware feeds the external watchdog with 1s pulses. GPIO
watchdog driver is able to either generate a 1us pulses or toggle the
output line. 1us is not enough for the external watchod timer, so
the line toggling driver mode is utilized.
Installation:
Vendor's firmware is OpenWrt (LEDE) based, so the sysupgrade image can
be directly used to install OpenWrt. Firmware must be upgraded using the
'force' and 'do not save configuration' command line options (or
correspondig web interface checkboxes) since the vendor firmware is from
the pre-DSA era.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
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Mar 30, 2022
Ticerex on the OpenWrt Forum reported a gnarly crash when he was using Samsung 840 and 850 EVOs with his MyBook Live: | BUG: Kernel NULL pointer dereference at 0x00000000 | Faulting instruction address: 0xc03ed4b8 | Oops: Kernel access of bad area, sig: 11 [#1] | BE PAGE_SIZE=4K PowerPC 44x Platform | CPU: 0 PID: 362 Comm: scsi_eh_1 Not tainted 5.4.163 #0 | NIP: c03ed4b8 LR: c03d27e8 CTR: c03ed36c | REGS: cfa59950 TRAP: 0300 Not tainted (5.4.163) | MSR: 00021000 <CE,ME> CR: 42000222 XER: 00000000 | DEAR: 00000000 ESR: 00000000 | GPR00: c03d27e8 cfa59a08 cfa55fe0 00000000 0fa46bc0 [...] | [..] | NIP [c03ed4b8] sata_dwc_qc_issue+0x14c/0x254 | LR [c03d27e8] ata_qc_issue+0x1c8/0x2dc | Call Trace: | [cfa59a08] [c003f4e0] __cancel_work_timer+0x124/0x194 (unreliable) | [cfa59a78] [c03d27e8] ata_qc_issue+0x1c8/0x2dc | [cfa59a98] [c03d2b3c] ata_exec_internal_sg+0x240/0x524 | [cfa59b08] [c03d2e98] ata_exec_internal+0x78/0xe0 | [cfa59b58] [c03d30fc] ata_read_log_page.part.38+0x1dc/0x204 | [cfa59bc8] [c03d324c] ata_identify_page_supported+0x68/0x130 | [...] This turned out this is an issue with upstream changing ATA_TAG_INTERNAL's value from 31 to 32 during 4.18 release. Update "SATA_DWC_QCMD_MAX" to account for that. Link: https://forum.openwrt.org/t/my-book-live-duo-reboot-loop/122464 Signed-off-by: Christian Lamparter <chunkeey@gmail.com> (cherry picked from commit 5ac672cfab60e90ab8a0bf3491fa2a27619d22d6)
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Oct 15, 2023
Ticerex on the OpenWrt Forum reported a gnarly crash when he was using Samsung 840 and 850 EVOs with his MyBook Live: | BUG: Kernel NULL pointer dereference at 0x00000000 | Faulting instruction address: 0xc03ed4b8 | Oops: Kernel access of bad area, sig: 11 [#1] | BE PAGE_SIZE=4K PowerPC 44x Platform | CPU: 0 PID: 362 Comm: scsi_eh_1 Not tainted 5.4.163 #0 | NIP: c03ed4b8 LR: c03d27e8 CTR: c03ed36c | REGS: cfa59950 TRAP: 0300 Not tainted (5.4.163) | MSR: 00021000 <CE,ME> CR: 42000222 XER: 00000000 | DEAR: 00000000 ESR: 00000000 | GPR00: c03d27e8 cfa59a08 cfa55fe0 00000000 0fa46bc0 [...] | [..] | NIP [c03ed4b8] sata_dwc_qc_issue+0x14c/0x254 | LR [c03d27e8] ata_qc_issue+0x1c8/0x2dc | Call Trace: | [cfa59a08] [c003f4e0] __cancel_work_timer+0x124/0x194 (unreliable) | [cfa59a78] [c03d27e8] ata_qc_issue+0x1c8/0x2dc | [cfa59a98] [c03d2b3c] ata_exec_internal_sg+0x240/0x524 | [cfa59b08] [c03d2e98] ata_exec_internal+0x78/0xe0 | [cfa59b58] [c03d30fc] ata_read_log_page.part.38+0x1dc/0x204 | [cfa59bc8] [c03d324c] ata_identify_page_supported+0x68/0x130 | [...] This turned out this is an issue with upstream changing ATA_TAG_INTERNAL's value from 31 to 32 during 4.18 release. Update "SATA_DWC_QCMD_MAX" to account for that. Link: https://forum.openwrt.org/t/my-book-live-duo-reboot-loop/122464 Signed-off-by: Christian Lamparter <chunkeey@gmail.com> (cherry picked from commit e95dec8)
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Jan 8, 2024
Hardware specification: SoC: MediaTek MT7981B 2x A53 Flash: 16MB NOR RAM: 256MB Ethernet: 2x 10/100/1000 Mbps Switch: MediaTek MT7531AE WiFi: MediaTek MT7976C Button: Reset Power: DC 12V 1A, PoE 802.3af 48V Flash instructions: Option #1 - SSH I was able to SSH into the stock firmware of my device. 1. Attach the router to the network 2. Use scp (-O) to copy the sysupgrade image 3. Connect using SSH and run `sysupgrade -n` Option #2 - U-Boot One way to use the bootloader for flashing is using TFTP: 1. Connect to the router using an ethernet cable 2 Spin up a TFTP server serving the sysupgrade file 3. Open the case and attach a UART 4. Attach power to the router and interrupt the countdown by pressing any key 5. Select option #2 (Upgrade firmware) 6. Enter IP address information and image name 7. Wait patiently Co-Authored-By: Enrique Rodríguez Valencia <enrique.rodriguez@galgus.net> Co-Authored-By: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Leon M. Busch-George <leon@georgemail.eu>
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Mar 12, 2024
Currently, the existing uncompressed kallsym support is causing qualcommax boards to hang on boot, and only after earlycon and verbose BUG() prints are enabled the trace is visible: [ 0.000000] ------------[ cut here ]------------ [ 0.000000] kernel BUG at kernel/kallsyms.c:340! [ 0.000000] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP Felix has fixed up the uncompressed kallsyms support so modify the current patch with the fix. All credits for the code go to Felix. Signed-off-by: Robert Marko <robimarko@gmail.com>
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Mar 30, 2024
Don't add KERNEL_TESTING_PATCHVER yet as there are some issues with it. On TP-Link Archer C2300 serial console seems to stop working after preinit: > Press the [f] key and hit [enter] to enter failsafe mode > Press the [1], [2], [3] or [4] key and hit [enter] to select the de� On Netgear R8000P XHCI causes external abort: [ 2.139586] Internal error: synchronous external abort: 0000000096000210 [#1] SMP [ 2.147212] Modules linked in: xhci_plat_hcd(+) xhci_hcd ohci_platform ohci_hcd fsl_mph_dr_of ehci_platform ehci_fsl ehci_hcd gpio_button_hotplug(O) usbcore nls_base usb_common crc32c_generic [ 2.164774] CPU: 0 PID: 358 Comm: kmodloader Tainted: G O 6.6.22 #0 [ 2.172658] Hardware name: Netgear R8000P (DT) [ 2.177229] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 2.184395] pc : xhci_gen_setup+0x80/0x34c [xhci_hcd] [ 2.189591] lr : xhci_gen_setup+0x74/0x34c [xhci_hcd] [ 2.194788] sp : ffffffc0815d37b0 [ 2.198194] x29: ffffffc0815d37b0 x28: ffffff8002000000 x27: ffffff8001172d88 [ 2.205540] x26: ffffff8002000000 x25: 0000000000000000 x24: ffffffc078b603c0 [ 2.212888] x23: ffffffc078b2a008 x22: ffffff8001172c10 x21: ffffff8002000000 [ 2.220235] x20: ffffff8002000000 x19: ffffff8002000250 x18: 0000000000000000 [ 2.227582] x17: 626d756e20737562 x16: 2064656e67697373 x15: ffffffffffffffff [ 2.234929] x14: ffffff80019e9915 x13: ffffff80019e9913 x12: 00000000ffffffea [ 2.242276] x11: 00000000ffffefff x10: 0000000000000062 x9 : 00000000ffffffd0 [ 2.246760] bcm63138_nand ff801800.nand-controller: timeout waiting for command 0x4 [ 2.249623] x8 : 0000000000000073 x7 : ffffffc0815d37c0 x6 : 0000000000000075 [ 2.257513] bcm63138_nand ff801800.nand-controller: intfc status c00000e0 [ 2.264855] x5 : 0000000000000081 x4 : 0000000000000000 x3 : ffffff8001b61800 [ 2.279193] x2 : ffffffc080b5d000 x1 : ffffff80020003a8 x0 : ffffff8002000398 [ 2.286540] Call trace: [ 2.289048] xhci_gen_setup+0x80/0x34c [xhci_hcd] Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Jul 4, 2024
If this function is marked as __init, kernel will splat when driver is (re)bind echo "c080000.ethernet">/sys/bus/platform/drivers/ipqess-edma/unbind echo "c080000.ethernet">/sys/bus/platform/drivers/ipqess-edma/bind Example with additional print messages, functions at boot: [ 2.039468] ipqess-edma c080000.ethernet: ipqess_axi_probe pre register_netdev [ 2.039530] ipqess-edma c080000.ethernet: *netdev: c27d2000 [ 2.045609] ipqess-edma c080000.ethernet: &ipqess_init: c0d1e28c [ 2.051122] ipqess_init [ 2.057338] netdev: c27d2000 [ 2.059492] ess = netdev_priv: c27d2500 [ 2.062615] ess->pdev: c2138c00 [ 2.066174] ess->pdev->dev: c2138c10 [ 2.069314] ess->pdev->dev.of_node: ef6f6368 [ 2.073120] ess->pdev->dev.of_node: /soc/ethernet@c080000 fails (bind) after unbind: [ 34.987948] ipqess-edma c080000.ethernet: ipqess_axi_probe pre register_netdev [ 34.988012] ipqess-edma c080000.ethernet: *netdev: c27d6000 [ 34.994088] ipqess-edma c080000.ethernet: &ipqess_init: c0d1e28c [ 34.999652] 8<--- cut here --- [ 35.005802] Unable to handle kernel paging request at virtual address c0d1e28c when execute [ 35.008676] [c0d1e28c] *pgd=80c1941e(bad) [ 35.016918] Internal error: Oops: 8000000d [#1] SMP ARM Signed-off-by: John Thomson <git@johnthomson.fastmail.com.au> Link: openwrt#15831 Signed-off-by: Robert Marko <robimarko@gmail.com>
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Hardware specification: SoC: MediaTek MT7981B 2x A53 Flash: 16MB NOR RAM: 256MB Ethernet: 2x 10/100/1000 Mbps Switch: MediaTek MT7531AE WiFi: MediaTek MT7976C Button: Reset Power: DC 12V 1A, PoE 802.3af 48V Flash instructions: Option #1 - SSH I was able to SSH into the stock firmware of my device. 1. Attach the router to the network 2. Use scp (-O) to copy the sysupgrade image 3. Connect using SSH and run `sysupgrade -n` Option #2 - U-Boot One way to use the bootloader for flashing is using TFTP: 1. Connect to the router using an ethernet cable 2 Spin up a TFTP server serving the sysupgrade file 3. Open the case and attach a UART 4. Attach power to the router and interrupt the countdown by pressing any key 5. Select option #2 (Upgrade firmware) 6. Enter IP address information and image name 7. Wait patiently Co-Authored-By: Enrique Rodríguez Valencia <enrique.rodriguez@galgus.net> Co-Authored-By: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Leon M. Busch-George <leon@georgemail.eu> (cherry picked from commit b4086f4)
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