[tip: x86/urgent] syscalls: Fix offset type of ksys_ftruncate()

[tip-bot2 for Jiri Slaby]

The following commit has been merged into the x86/urgent branch of tip:

Commit-ID:     8e742aa79780b13cd300a42198c1a4cea9c89905
Gitweb:        https://git.kernel.org/tip/8e742aa79780b13cd300a42198c1a4cea9c89905
Author:        Jiri Slaby <jslaby@xxxxxxx>
AuthorDate:    Wed, 10 Jun 2020 13:48:51 +02:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Mon, 15 Jun 2020 11:16:27 +02:00

syscalls: Fix offset type of ksys_ftruncate()

After the commit below, truncate() on x86 32bit uses ksys_ftruncate(). But
ksys_ftruncate() truncates the offset to unsigned long.

Switch the type of offset to loff_t which is what do_sys_ftruncate()
expects.

Fixes: 121b32a58a3a (x86/entry/32: Use IA32-specific wrappers for syscalls taking 64-bit arguments)
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Brian Gerst <brgerst@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20200610114851.28549-1-jslaby@xxxxxxx
---
 include/linux/syscalls.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 7c354c2..b951a87 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -1360,7 +1360,7 @@ static inline long ksys_lchown(const char __user *filename, uid_t user,
 
 extern long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
 
-static inline long ksys_ftruncate(unsigned int fd, unsigned long length)
+static inline long ksys_ftruncate(unsigned int fd, loff_t length)
 {
 	return do_sys_ftruncate(fd, length, 1);
 }