Andy Lutomirski 56e62cd28a x86/fault: Correct a few user vs kernel checks wrt WRUSS ... In general, page fault errors for WRUSS should be just like get_user(), etc. Fix three bugs in this area: There is a comment that says that, if the kernel can't handle a page fault on a user address due to OOM, the OOM-kill-and-retry logic would be skipped. The code checked kernel *privilege*, not kernel mode, so it missed WRUSS. This means that the kernel would malfunction if it got OOM on a WRUSS fault -- this would be a kernel-mode, user-privilege fault, and the OOM killer would be invoked and the handler would retry the faulting instruction. A failed user access from kernel while a fatal signal is pending should fail even if the instruction in question was WRUSS. do_sigbus() should not send SIGBUS for WRUSS -- it should handle it like any other kernel mode failure. Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/a7b7bcea730bd4069e6b7e629236bb2cf526c2fb.1612924255.git.luto@kernel.org		2021-02-10 14:13:32 +01:00
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boot	EFI updates collected by Ard Biesheuvel:	2020-12-24 12:40:07 -08:00
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entry	epoll: wire up syscall epoll_pwait2	2020-12-19 11:18:38 -08:00
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include	local64.h: make <asm/local64.h> mandatory	2020-12-29 15:36:49 -08:00
kernel	A treewide cleanup of interrupt descriptor (ab)use with all sorts of racy	2020-12-24 13:50:23 -08:00
kvm	ARM:	2020-12-20 10:44:05 -08:00
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mm	x86/fault: Correct a few user vs kernel checks wrt WRUSS	2021-02-10 14:13:32 +01:00
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xen	EFI updates collected by Ard Biesheuvel:	2020-12-24 12:40:07 -08:00
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Kconfig	Tracing updates for 5.11	2020-12-17 13:22:17 -08:00
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