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| author | Al Viro <viro@zeniv.linux.org.uk> | 2023-01-31 07:48:54 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2023-03-02 20:30:08 +0300 |
| commit | bd75497a77ccae9a5e1b0f1a3fa8283d67b21f4c (patch) | |
| tree | 81397d2da394c3c03d59ce974611336f2f033d0c /arch/riscv/mm/fault.c | |
| parent | c9c3395d5e3dcc6daee66c6908354d47bf98cb0c (diff) | |
| download | linux-bd75497a77ccae9a5e1b0f1a3fa8283d67b21f4c.tar.xz | |
m68k: fix livelock in uaccess
m68k equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Tested-by: Finn Thain <fthain@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/riscv/mm/fault.c')
0 files changed, 0 insertions, 0 deletions