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Subjectkernel panic: stack is corrupted in validate_chain

syzbot found the following crash on:

HEAD commit: 249155c2 Merge branch 'parisc-5.2-4' of git://git.kernel.o..
git tree: upstream
console output:
kernel config:
dashboard link:
compiler: clang version 9.0.0 (/home/glider/llvm/clang
syz repro:

IMPORTANT: if you fix the bug, please add the following tag to the commit:

Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in:
validate_chain+0x69fc/0x84f0 kernel/locking/lockdep.c:161
CPU: 0 PID: 8300 Comm: syz-executor.4 Not tainted 5.2.0-rc6+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..

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  Last update: 2019-06-25 23:48    [W:0.045 / U:0.504 seconds]
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