Hi,
The asm-generic/unistd.h file has wrong __NR_userfaultfd syscall number which
doesn't even depend on the architecture. This has caused failure of a selftest
which was fixed recently [1].
grep -rnIF "#define __NR_userfaultfd"
tools/include/uapi/asm-generic/unistd.h:681:#define __NR_userfaultfd 282
arch/x86/include/generated/uapi/asm/unistd_32.h:374:#define __NR_userfaultfd 374
arch/x86/include/generated/uapi/asm/unistd_64.h:327:#define __NR_userfaultfd 323
arch/x86/include/generated/uapi/asm/unistd_x32.h:282:#define __NR_userfaultfd
(__X32_SYSCALL_BIT + 323)
arch/arm/include/generated/uapi/asm/unistd-eabi.h:347:#define __NR_userfaultfd
(__NR_SYSCALL_BASE + 388)
arch/arm/include/generated/uapi/asm/unistd-oabi.h:359:#define __NR_userfaultfd
(__NR_SYSCALL_BASE + 388)
include/uapi/asm-generic/unistd.h:681:#define __NR_userfaultfd 282
The number is dependent on the architecture. The above data shows that it
is different for different arch:
x86 374
x86_64 323
ARM 347/358
It seems include/uapi/asm-generic/unistd has wrong 282 value in it. Maybe I'm
missing some context.. Please have a look at it.
The __NR_userfaultfd was added to include/uapi/asm-generic/unistd.h in
09f7298100ea ("Subject: [PATCH] userfaultfd: register uapi generic syscall
(aarch64)").
[1]
https://lore.kernel.org/all/[email protected]
--
BR,
/Muhammad Usama Anjum
