Commit 1d2fc446bd1cf90fb93a1164538dcc4530a06d33 | zig

author	Andrew Kelley <andrew@ziglang.org> 2019-07-08 17:52:28-04:00
committer	Andrew Kelley <andrew@ziglang.org> 2019-07-08 17:52:28-04:00
log	1d2fc446bd1cf90fb93a1164538dcc4530a06d33
tree	ce0358206c00d93bf1524eefab28a6045c679ec6
parent	fc9e28ea37e0110836d6958c39ffe78ea6cad0f3
signature	Commit is signed but in an unrecognized format.

cap getdents length argument to INT_MAX

the linux syscall treats this argument as having type int, so passing
extremely long buffer sizes would be misinterpreted by the kernel.
since "short reads" are always acceptable, just cap it down.

patch based on musl commit 3d178a7e2b75066593fbd5705742c5808395d90d

1 files changed, 14 insertions(+), 4 deletions(-)

std
- os
  - linux.zig

std/os/linux.zig+14-4

...	...	@@ -106,12 +106,22 @@ pub fn getcwd(buf: [*]u8, size: usize) usize {
106	106	return syscall2(SYS_getcwd, @ptrToInt(buf), size);
107	107	}
108	108
109		pub fn getdents(fd: i32, dirp: [*]u8, count: usize) usize {
110		return syscall3(SYS_getdents, @bitCast(usize, isize(fd)), @ptrToInt(dirp), count);
	109	pub fn getdents(fd: i32, dirp: [*]u8, len: usize) usize {
	110	return syscall3(
	111	SYS_getdents,
	112	@bitCast(usize, isize(fd)),
	113	@ptrToInt(dirp),
	114	std.math.min(len, maxInt(c_int)),
	115	);
111	116	}
112	117
113		pub fn getdents64(fd: i32, dirp: [*]u8, count: usize) usize {
114		return syscall3(SYS_getdents64, @bitCast(usize, isize(fd)), @ptrToInt(dirp), count);
	118	pub fn getdents64(fd: i32, dirp: [*]u8, len: usize) usize {
	119	return syscall3(
	120	SYS_getdents64,
	121	@bitCast(usize, isize(fd)),
	122	@ptrToInt(dirp),
	123	std.math.min(len, maxInt(c_int)),
	124	);
115	125	}
116	126
117	127	pub fn inotify_init1(flags: u32) usize {