On Sun, Jun 12, 2022 at 12:05 PM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > > On Sun, Jun 12, 2022 at 11:59:58AM -0600, Yu Zhao wrote: > > Please let me know if there is something we want to test -- I can > > reproduce the problem reliably: > > > > ------------[ cut here ]------------ > > kernel BUG at mm/usercopy.c:101! > > The line right before cut here would have been nice ;-) Right. $ grep usercopy: usercopy: Kernel memory exposure attempt detected from vmalloc (offset 2882303761517129920, size 11)! usercopy: Kernel memory exposure attempt detected from vmalloc (offset 8574853690513436864, size 11)! usercopy: Kernel memory exposure attempt detected from vmalloc (offset 7998392938210013376, size 11)! ... > https://lore.kernel.org/linux-mm/YqXU+oU7wayOcmCe@xxxxxxxxxxxxxxxxxxxx/ > > might fix your problem, but I can't be sure without that line. Thanks, it worked!
