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Commit 9a926d86 authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Sign extend length arg to truncate syscalls when compat. 



The first thing sys_truncate() and sys_ftruncate() do is sign extend
the unsigned length arg to a signed type.

Thanks to Benjamin Herrenschmidt for the tip.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 14d87e6c

arch/sparc/kernel/sys32.S

+2 −0
Original line number Diff line number Diff line
@@ -138,6 +138,8 @@ SIGN2(sys32_splice, sys_splice, %o0, %o1) 
SIGN2(sys32_sync_file_range, compat_sync_file_range, %o0, %o5)

SIGN2(sys32_tee, sys_tee, %o0, %o1)

SIGN1(sys32_vmsplice, compat_sys_vmsplice, %o0)

SIGN1(sys32_truncate, sys_truncate, %o1)

SIGN1(sys32_ftruncate, sys_ftruncate, %o1)



	.globl		sys32_mmap2

sys32_mmap2:

arch/sparc/kernel/systbls_64.S

+2 −2
Original line number Diff line number Diff line
@@ -43,8 +43,8 @@ sys_call_table32: 
/*110*/	.word sys_setresgid, sys_getresgid, sys_setregid, sys_nis_syscall, sys_nis_syscall

	.word sys32_getgroups, compat_sys_gettimeofday, sys32_getrusage, sys_nis_syscall, sys_getcwd

/*120*/	.word compat_sys_readv, compat_sys_writev, compat_sys_settimeofday, sys_fchown16, sys_fchmod

	.word sys_nis_syscall, sys_setreuid16, sys_setregid16, sys_rename, sys_truncate

/*130*/	.word sys_ftruncate, sys_flock, compat_sys_lstat64, sys_nis_syscall, sys_nis_syscall

	.word sys_nis_syscall, sys_setreuid16, sys_setregid16, sys_rename, sys32_truncate

/*130*/	.word sys32_ftruncate, sys_flock, compat_sys_lstat64, sys_nis_syscall, sys_nis_syscall

	.word sys_nis_syscall, sys32_mkdir, sys_rmdir, compat_sys_utimes, compat_sys_stat64

/*140*/	.word sys32_sendfile64, sys_nis_syscall, sys32_futex, sys_gettid, compat_sys_getrlimit

	.word compat_sys_setrlimit, sys_pivot_root, sys32_prctl, sys_pciconfig_read, sys_pciconfig_write