Messages in this thread | | | Date | Mon, 16 Oct 2023 12:05:37 +0100 | From | Lorenzo Stoakes <> | Subject | Re: mm: Unable to handle kernel NULL pointer dereference at virtual address - mmap_region (include/linux/fs.h:580 mm/mmap.c:2946) |
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On Mon, Oct 16, 2023 at 03:52:07PM +0530, Naresh Kamboju wrote: > Following kernel crash noticed while running LTP hugetlb and selftests on > qemu-x86_64 and qemu-arm64 running with Linux next 6.6.0-rc6-next-20231016. > > Reported-by: Linux Kernel Functional Testing <lkft@linaro.org> > Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> > > Test Logs: > -----
[snip]
> <4>[ 97.499871] Call trace: > <4>[ 97.500288] mmap_region (include/linux/fs.h:580 mm/mmap.c:2946)
OK this is from a patch of mine, and an easy fix (incorrect assumption about vm->vm_file == file).
I will put a fix forward tonight.
> <4>[ 97.500814] do_mmap (mm/mmap.c:1379) > <4>[ 97.501243] vm_mmap_pgoff (mm/util.c:546) > <4>[ 97.501711] ksys_mmap_pgoff (mm/mmap.c:1425) > <4>[ 97.502166] __arm64_sys_mmap (arch/arm64/kernel/sys.c:21) > <4>[ 97.502634] invoke_syscall (arch/arm64/include/asm/current.h:19 > arch/arm64/kernel/syscall.c:56) > <4>[ 97.503175] el0_svc_common.constprop.0 > (include/linux/thread_info.h:127 (discriminator 2) > arch/arm64/kernel/syscall.c:144 (discriminator 2)) > <4>[ 97.503763] do_el0_svc (arch/arm64/kernel/syscall.c:156) > <4>[ 97.504191] el0_svc (arch/arm64/include/asm/daifflags.h:28 > arch/arm64/kernel/entry-common.c:133 > arch/arm64/kernel/entry-common.c:144 > arch/arm64/kernel/entry-common.c:679)
[snip]
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