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Subject4.11.0-rc2 BUG: Bad page map in process libinput-device
Date
I've had no issues building the 4.11.0-rc1+ kernels on x86_64 until some 
commits in the last 24 hours, that resulted in:

[ 18.746569] BUG: Bad page map in process libinput-device
pte:00003f90 pmd:22
0910067
[ 18.746757] addr:00007efd31d00000 vm_flags:08000070 anon_vma:
(null)
mapping:ffff9e282db48320 index:1a0
[ 18.747051] file:libffi.so.6.0.4 fault:ext4_filemap_fault [ext4]
mmap:ext4_fi
le_mmap [ext4] readpage:ext4_readpage [ext4]
[ 18.747243] CPU: 1 PID: 548 Comm: libinput-device Not tainted
4.11.0-rc2 #2635
[ 18.747370] Hardware name: System manufacturer System Product
Name/M3A78 PRO, BIOS 1701 01/27/2011
[ 18.747528] Call Trace:
[ 18.747587] ? dump_stack+0x5c/0x84
[ 18.747656] ? print_bad_pte+0x1f8/0x2e0
[ 18.747731] ? __dec_node_state+0x58/0xc0
[ 18.747809] ? lock_page_memcg+0x11/0x80
[ 18.747884] ? vm_normal_page+0x91/0xa0
[ 18.747959] ? unmap_page_range+0x575/0x920
[ 18.748041] ? unmap_vmas+0x4c/0xa0
[ 18.748109] ? exit_mmap+0x9b/0x160
[ 18.748179] ? mmput+0x4d/0x150
[ 18.748240] ? do_exit+0x28f/0xb90
[ 18.748308] ? vfs_write+0x16b/0x1b0
[ 18.748376] ? do_group_exit+0x3a/0xa0
[ 18.748447] ? SyS_exit_group+0x10/0x10
[ 18.748521] ? entry_SYSCALL_64_fastpath+0x1e/0xad
[ 18.748658] Disabling lock debugging due to kernel taint

Is there a way to run git bisect to start with the git head of about
24-48 hours previously (known good) and the current git head as bad?

I can supply config/build options/full dmesg and run tests.

Arthur.

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