Searched hist:"6 ec20aa2e510b6297906c45f009aa08b2d97269a" (Results 1 – 4 of 4) sorted by relevance
| /openbmc/linux/arch/powerpc/include/asm/nohash/32/ |
| H A D | kup-8xx.h | diff 6ec20aa2e510b6297906c45f009aa08b2d97269a Fri Jan 24 05:54:40 CST 2020 Christophe Leroy <christophe.leroy@c-s.fr> powerpc/32s: Fix bad_kuap_fault()
At the moment, bad_kuap_fault() reports a fault only if a bad access
to userspace occurred while access to userspace was not granted.
But if a fault occurs for a write outside the allowed userspace
segment(s) that have been unlocked, bad_kuap_fault() fails to
detect it and the kernel loops forever in do_page_fault().
Fix it by checking that the accessed address is within the allowed
range.
Fixes: a68c31fc01ef ("powerpc/32s: Implement Kernel Userspace Access Protection")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/f48244e9485ada0a304ed33ccbb8da271180c80d.1579866752.git.christophe.leroy@c-s.fr
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| /openbmc/linux/arch/powerpc/include/asm/ |
| H A D | kup.h | diff 6ec20aa2e510b6297906c45f009aa08b2d97269a Fri Jan 24 05:54:40 CST 2020 Christophe Leroy <christophe.leroy@c-s.fr> powerpc/32s: Fix bad_kuap_fault()
At the moment, bad_kuap_fault() reports a fault only if a bad access
to userspace occurred while access to userspace was not granted.
But if a fault occurs for a write outside the allowed userspace
segment(s) that have been unlocked, bad_kuap_fault() fails to
detect it and the kernel loops forever in do_page_fault().
Fix it by checking that the accessed address is within the allowed
range.
Fixes: a68c31fc01ef ("powerpc/32s: Implement Kernel Userspace Access Protection")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/f48244e9485ada0a304ed33ccbb8da271180c80d.1579866752.git.christophe.leroy@c-s.fr
|
| /openbmc/linux/arch/powerpc/include/asm/book3s/32/ |
| H A D | kup.h | diff 6ec20aa2e510b6297906c45f009aa08b2d97269a Fri Jan 24 05:54:40 CST 2020 Christophe Leroy <christophe.leroy@c-s.fr> powerpc/32s: Fix bad_kuap_fault()
At the moment, bad_kuap_fault() reports a fault only if a bad access
to userspace occurred while access to userspace was not granted.
But if a fault occurs for a write outside the allowed userspace
segment(s) that have been unlocked, bad_kuap_fault() fails to
detect it and the kernel loops forever in do_page_fault().
Fix it by checking that the accessed address is within the allowed
range.
Fixes: a68c31fc01ef ("powerpc/32s: Implement Kernel Userspace Access Protection")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/f48244e9485ada0a304ed33ccbb8da271180c80d.1579866752.git.christophe.leroy@c-s.fr
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| /openbmc/linux/arch/powerpc/mm/ |
| H A D | fault.c | diff 6ec20aa2e510b6297906c45f009aa08b2d97269a Fri Jan 24 05:54:40 CST 2020 Christophe Leroy <christophe.leroy@c-s.fr> powerpc/32s: Fix bad_kuap_fault()
At the moment, bad_kuap_fault() reports a fault only if a bad access
to userspace occurred while access to userspace was not granted.
But if a fault occurs for a write outside the allowed userspace
segment(s) that have been unlocked, bad_kuap_fault() fails to
detect it and the kernel loops forever in do_page_fault().
Fix it by checking that the accessed address is within the allowed
range.
Fixes: a68c31fc01ef ("powerpc/32s: Implement Kernel Userspace Access Protection")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/f48244e9485ada0a304ed33ccbb8da271180c80d.1579866752.git.christophe.leroy@c-s.fr
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