Kalle Valo <kvalo@xxxxxxxxxxxxxx> writes: > Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> writes: > >> Hi Kalle, >> >> On Thu, Mar 04, 2021 at 04:59:33PM +0200, Kalle Valo wrote: >>> Hi MHI folks, >>> >>> I upgraded my QCA6390 x86 test box to v5.12-rc1 and started seeing >>> kernel crashes when testing ath11k. I don't recall seeing this on v5.11 >>> so it looks like a new problem, but I cannot be 100% sure. Netconsole >>> output is below. I have most of the kernel debug functionality enabled >>> (KASAN etc). >>> >>> I can fairly easy reproduce this by looping insmod and rmmod of mhi, >>> wireless and ath11k modules. It does not happen every time, but I would >>> say I can reproduce the problem within 10 test loops or so. >>> >>> Any ideas what could cause this? I have not bisected this due to lack of >>> time, but I can test patches etc. >>> >> >> Not sure if this is related, Loic sent a patch which fixes an issue with >> "mhi_pm_state_worker": >> >> https://patchwork.kernel.org/project/linux-arm-msm/patch/1614161930-8513-1-git-send-email-loic.poulain@xxxxxxxxxx/ >> >> Can you please test see if it fixes your issue also? > > Thanks for the link, but unfortunately not :( I was able to reproduce > the issue just after 3 insmod/rmmod loops. I investigated this a bit more, I was actually able to reproduce this in v5.11 as well. So this is not a new regression. The reason why I started seeing this until now is that I enable more debug options in the kernel, the diff below. Without those changes I don't see the problem. I also found a workround, if I add sleep(1) after insmod ath11k_pci in my test script I see 200 loops without crashes. But when I removed the sleep the test script crashed only after 19 loops. So there definitely is a race condition somewhere, just don't know where. I don't have time to investigate this more, so I'll just use the workaround for the time being. --- ../configs/nuc-debug-5.11 2021-02-21 08:55:53.836061988 +0200 +++ .config 2021-03-09 16:22:53.598684524 +0200 @@ -12,6 +12,7 @@ CONFIG_CC_CAN_LINK_STATIC=y CONFIG_CC_HAS_ASM_GOTO=y CONFIG_CC_HAS_ASM_INLINE=y +CONFIG_CONSTRUCTORS=y CONFIG_IRQ_WORK=y CONFIG_BUILDTIME_TABLE_SORT=y CONFIG_THREAD_INFO_IN_TASK=y @@ -280,6 +281,7 @@ CONFIG_ARCH_WANT_GENERAL_HUGETLB=y CONFIG_ZONE_DMA32=y CONFIG_AUDIT_ARCH=y +CONFIG_KASAN_SHADOW_OFFSET=0xdffffc0000000000 CONFIG_HAVE_INTEL_TXT=y CONFIG_X86_64_SMP=y CONFIG_ARCH_SUPPORTS_UPROBES=y @@ -748,8 +750,7 @@ # CONFIG_MODULE_SIG is not set # CONFIG_MODULE_COMPRESS is not set # CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS is not set -# CONFIG_UNUSED_SYMBOLS is not set -# CONFIG_TRIM_UNUSED_KSYMS is not set +CONFIG_UNUSED_SYMBOLS=y CONFIG_MODULES_TREE_LOOKUP=y CONFIG_BLOCK=y CONFIG_BLK_SCSI_REQUEST=y @@ -1164,7 +1165,6 @@ # CONFIG_NET_NCSI is not set CONFIG_RPS=y CONFIG_RFS_ACCEL=y -CONFIG_SOCK_RX_QUEUE_MAPPING=y CONFIG_XPS=y # CONFIG_CGROUP_NET_PRIO is not set # CONFIG_CGROUP_NET_CLASSID is not set @@ -1685,7 +1685,6 @@ # # Distributed Switch Architecture drivers # -# CONFIG_NET_DSA_MV88E6XXX_PTP is not set # end of Distributed Switch Architecture drivers CONFIG_ETHERNET=y @@ -1700,6 +1699,7 @@ # CONFIG_NET_VENDOR_AQUANTIA is not set # CONFIG_NET_VENDOR_ARC is not set # CONFIG_NET_VENDOR_ATHEROS is not set +# CONFIG_NET_VENDOR_AURORA is not set # CONFIG_NET_VENDOR_BROADCOM is not set CONFIG_NET_VENDOR_BROCADE=y # CONFIG_BNA is not set @@ -1914,7 +1914,6 @@ # CONFIG_MT7615E is not set # CONFIG_MT7663U is not set # CONFIG_MT7915E is not set -# CONFIG_MT7921E is not set # CONFIG_WLAN_VENDOR_MICROCHIP is not set CONFIG_WLAN_VENDOR_RALINK=y # CONFIG_RT2X00 is not set @@ -4500,7 +4499,7 @@ CONFIG_DEBUG_INFO_COMPRESSED=y # CONFIG_DEBUG_INFO_SPLIT is not set # CONFIG_DEBUG_INFO_DWARF4 is not set -# CONFIG_GDB_SCRIPTS is not set +CONFIG_GDB_SCRIPTS=y CONFIG_FRAME_WARN=2048 # CONFIG_STRIP_ASM_SYMS is not set # CONFIG_READABLE_ASM is not set @@ -4540,13 +4539,13 @@ CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT=y CONFIG_PAGE_OWNER=y CONFIG_PAGE_POISONING=y -# CONFIG_DEBUG_PAGE_REF is not set +CONFIG_DEBUG_PAGE_REF=y # CONFIG_DEBUG_RODATA_TEST is not set CONFIG_ARCH_HAS_DEBUG_WX=y CONFIG_DEBUG_WX=y CONFIG_GENERIC_PTDUMP=y CONFIG_PTDUMP_CORE=y -# CONFIG_PTDUMP_DEBUGFS is not set +CONFIG_PTDUMP_DEBUGFS=y CONFIG_DEBUG_OBJECTS=y # CONFIG_DEBUG_OBJECTS_SELFTEST is not set CONFIG_DEBUG_OBJECTS_FREE=y @@ -4568,8 +4567,8 @@ CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE=y CONFIG_DEBUG_VM=y CONFIG_DEBUG_VM_VMACACHE=y -# CONFIG_DEBUG_VM_RB is not set -# CONFIG_DEBUG_VM_PGFLAGS is not set +CONFIG_DEBUG_VM_RB=y +CONFIG_DEBUG_VM_PGFLAGS=y CONFIG_DEBUG_VM_PGTABLE=y CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y CONFIG_DEBUG_VIRTUAL=y @@ -4581,7 +4580,13 @@ CONFIG_HAVE_ARCH_KASAN_VMALLOC=y CONFIG_CC_HAS_KASAN_GENERIC=y CONFIG_CC_HAS_WORKING_NOSANITIZE_ADDRESS=y -# CONFIG_KASAN is not set +CONFIG_KASAN=y +CONFIG_KASAN_GENERIC=y +# CONFIG_KASAN_OUTLINE is not set +CONFIG_KASAN_INLINE=y +CONFIG_KASAN_STACK=1 +CONFIG_KASAN_VMALLOC=y +# CONFIG_TEST_KASAN_MODULE is not set # end of Memory Debugging CONFIG_DEBUG_SHIRQ=y -- https://patchwork.kernel.org/project/linux-wireless/list/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
