Changes made by the mentioned commit lead to Oops when waking up after suspend to RAM. When waking up a Dell XPS 13 9350 with BCM4350 wifi card after suspend to RAM, the kernel hangs with a NULL pointer dereference and Oops. The issues was introduced by commit da6d9c8ecd00e20218461007948f2b0a8e7fa242 and only happens when the brcmfmac module is loaded. This issue is the reason we could not upgrade to newer kernels than the 6.1 series on the affected machine. Details: On a Dell XPS 13 9350 laptop with Broadcom BCM4350 wifi card (according to lspci), every kernel starting with 6.2 hangs when waking up after suspend to RAM. The issue persisted as of May 2nd (last tested commit was 348551ddaf311c76b01cdcbaf61b6fef06a49144). Passing the debug and no_console_suspend parameters to the kernel show that a NULL pointer dereference and an Oops happen at wakeup. Please find the kernel messages readable on the screen at this point attached (kernel_log_after_suspend.txt). A bisection was successful and produced the first bad commit [da6d9c8ecd00e20218461007948f2b0a8e7fa242] wifi: brcmfmac: add firmware vendor info in driver info I've attached the bisection log as well (bisect.txt). Suspend to RAM works on this machine on newer kernels once the brcmfmac module is unloaded. Distribution: Arch Linux Architecture: x86_64 Device: Dell XPS 13 9350 with BCM4350 wifi card Kernel config used at compilation (created using the Arch Linux default config and make olddefconfig): https://gist.githubusercontent.com/maclomhair/e33fa7eece8f8c77e5a88c4eede2f523/raw/429dfb022498c026225865dbb3ab2f75d5030a54/config Dmesg output after boot: https://gist.githubusercontent.com/maclomhair/47c75fa759d93800e7fb5e937fabef3e/raw/10750996a1ea9dcb3fa14d9b94e11fedd3abf280/dmesg #regzbot introduced da6d9c8ecd00e20218461007948f2b0a8e7fa242 Thank you for your time, Felix
Freezing remaining freezable tasks ... (elapsed 0.000. seconds) done. ACPI: EC: interrupt blocked ACPI: PM: Preparing to enter systen sleep state S3 ACPI: EC: event blocked ACPI: EC: EC stopped ACPI: PM: Saving platform NVS memory Disabling non-boot CPUs ... smpboot: CPU 1 is now offline smpboot: CPU 2 is now offline smpboot: CPU 3 is now offline ACPI: PM: Low-level resume complete ACPI: EC: EC started ACPI: PM: Restoring platform NVS memory Enabling non-boot CPUs ... x86: Booting SMP configuration: smpboot: Booting Node 0 Processor 1 APIC Ox2 CPU1 is up smpboot: Booting Node 0 Processor 2 APIC 0x1 CPU2 is up smpboot: Booting Node 0 Processor 3 APIC 0x3 CPU3 is up ACPI: PM: Waking up from system sleep state S3 ACPI: EC: interrupt unblocked ACPI: EC: event unblocked xhci hcd 0000:00:14.0: xHC error in resume, USBSTS Ox411, Reinit usb usb1: root hub lost power or was reset usb usb2: root hub lost power or was reset i915 0000:00:02.0: [drm] [ENCODER:94:DDI A/PHY A] is disabled/in DSI node with an ungated DDI clock, gate it i915 0000:00:02.0: [drm] [ENCODER:102:DDI B/PHY B] is disabled/in DSI mode with an ungated DDI clock, gate it i915 0000:00:02.0: [drm] [ENCODER:117:DDI C/PHY C1 is disabled/in DSI node with an ungated DDI clock, gate it nvme nvme0: 4/0/0 default/read/poll queues BUG: kernel NULL pointer dereference, address: 0000000000000018 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) — not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 3 PID: 576 Comm: kworker/uB:18 Tainted: G I 6.1.0-rc7-1-git-01766-gda6d9c8ecd00 #20 fa2e32ffad0b39d53b5e52ea9f9e599123b1d112 Hardware name: Dell Inc. XPS 13 9350/0PWNCR, BIDS 1.13.0 02/10/2020 Workgueue: events_unbound async_run_entry_fn RIP: 0010:brcmf_pcie_probe+Ox16b/0x7a0 [brcmfmac] Code: 49 89 44 24 48 48 85 c0 Of 84 f4 05 00 00 48 8d 85 d0 00 00 00 48 8b 34 24 48 89 ef 49 c7 44 24 40 e0 39 0d c1 49 89 44 24 10 <49> 8b 45 18 48 89 5e 08 41 89 44 24 38 8b 83 00 04 00 00 4c 89 26 RSP: 0000:ffffbd8041853d78 EFLAGS: 00010286 RAX: ffff97a10154f0d0 RBX: ffff97a105fc2800 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff97a275f04ff0 RDI: ffff97a10154f000 RBP: ffff97a10154f000 RO8: 0000000000000040 R09: ffff97a102bec0c0 R10: 0000000066000050 R11: ffffffffa6000031 R12: ffff97a1049379c0 R13: 0000000000000000 R14: 0000000000000000 R15: ffff97a10430c1a8 FS: 0000000000000000(0000) GS:ffff97a276d80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 00000000080050033 CR2: 0000000000000018 CR3: 0000000177810001 CR4: 00000000003706e0 Call Trace: <TASK> brcmf_pcie_pm_leave_D3+0xc5/8x1a0 [brcmfmac be3b4cefca451e190fa35be8f00db1bbec293887] ? pci_pm_resume+0x5b/0xf0 ? pci_legacy_resume+0x80/0x80 dpm_run_callback+0x47/0x150 device_resume+0xa2/0x1f0 async_resume+0x1d/0x30 async_run_entry_fn+0x31/0x130 process_one_work+0x1c4/0x380 worker_thread+0x51/0x390 ? rescuer_thread+0x3b0/0x3b0 kthread+Oxdb/0x110 ? kthread_complete_and_exit+0x20/0x20 usb 1-3: reset full-speed USB device number 2 using xhci_hcd706e0000000000004 24 48 89 ef 49 c7 44 24 40 e0 39 0d c1 49 89 44 24 10 <49> 8b 45 18 48 89 5e 08 41 89 44 24 38 8b 83 00 04 00 00 4c 89 26video i8032 serio wmish_cl usb 1-5: reset high-speed USB device number 3 using xhci_hcd
# bad: [c9c3395d5e3dcc6daee66c6908354d47bf98cb0c] Linux 6.2 # good: [830b3c68c1fb1e9176028d02ef86f3cf76aa2476] Linux 6.1 git bisect start 'v6.2' 'v6.1' # good: [1ca06f1c1acecbe02124f14a37cce347b8c1a90c] Merge tag 'xtensa-20221213' of https://github.com/jcmvbkbc/linux-xtensa git bisect good 1ca06f1c1acecbe02124f14a37cce347b8c1a90c # bad: [b83a7080d30032cf70832bc2bb04cc342e203b88] Merge tag 'staging-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging git bisect bad b83a7080d30032cf70832bc2bb04cc342e203b88 # bad: [7e68dd7d07a28faa2e6574dd6b9dbd90cdeaae91] Merge tag 'net-next-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next git bisect bad 7e68dd7d07a28faa2e6574dd6b9dbd90cdeaae91 # good: [c609d739947894d7370eae4cf04eb2c49e910bcf] Merge tag 'wireless-next-2022-11-18' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next git bisect good c609d739947894d7370eae4cf04eb2c49e910bcf # good: [32163491c0c205ffb1596baf9c308dee5338ae94] Merge branch 'r8169-irq-coalesce' git bisect good 32163491c0c205ffb1596baf9c308dee5338ae94 # good: [b2b509fb5a1e6af1e630a755b32c4658099df70b] Merge tag 'linux-can-next-for-6.2-20221212' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next git bisect good b2b509fb5a1e6af1e630a755b32c4658099df70b # bad: [f9c5cbd52c62f2fa9d2dfbe1af8fb00e5056aefe] btusb: Avoid reset of ISOC endpoint alt settings to zero git bisect bad f9c5cbd52c62f2fa9d2dfbe1af8fb00e5056aefe # good: [6b75bd3d036745b9be30917909f03602099adbdb] bpf: Refactor ARG_PTR_TO_DYNPTR checks into process_dynptr_func git bisect good 6b75bd3d036745b9be30917909f03602099adbdb # bad: [695c5d3a8055dcb97966496ade51968c9a75f5c6] wifi: rtl8xxxu: fixing IQK failures for rtl8192eu git bisect bad 695c5d3a8055dcb97966496ade51968c9a75f5c6 # bad: [d592b9f742643f07db53ac34baf6bbd3ce9478dc] wifi: rtw89: stop mac port function when stop_ap() git bisect bad d592b9f742643f07db53ac34baf6bbd3ce9478dc # bad: [8041f2bffbf1c0854d9f6675ad01dc6ca72f71dd] wifi: brcmfmac: introduce BRCMFMAC exported symbols namespace git bisect bad 8041f2bffbf1c0854d9f6675ad01dc6ca72f71dd # bad: [d6a5c562214f26e442c8ec3ff1e28e16675d1bcf] wifi: brcmfmac: add support for vendor-specific firmware api git bisect bad d6a5c562214f26e442c8ec3ff1e28e16675d1bcf # good: [76821aad49cebc69eca86800f41e8133104e91d3] wifi: brcmfmac: add function to unbind device to bus layer api git bisect good 76821aad49cebc69eca86800f41e8133104e91d3 # bad: [da6d9c8ecd00e20218461007948f2b0a8e7fa242] wifi: brcmfmac: add firmware vendor info in driver info git bisect bad da6d9c8ecd00e20218461007948f2b0a8e7fa242 # first bad commit: [da6d9c8ecd00e20218461007948f2b0a8e7fa242] wifi: brcmfmac: add firmware vendor info in driver info
