xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

give readdir(2)/getdents(2)/etc. uniform exclusion with lseek()

Browse Source 
same as read() on regular files has, and for the same reason.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2016-04-20 17:08:21 -04:00
parent 9902af79c0
commit 63b6df1413
7 changed files with 33 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
fs/compat.c
View File

@@ -884,7 +884,7 @@ COMPAT_SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
struct compat_old_linux_dirent __user *, dirent, unsigned int, count)
{
int error;
struct fd f = fdget(fd);
struct fd f = fdget_pos(fd);
struct compat_readdir_callback buf = {
.ctx.actor = compat_fillonedir,
.dirent = dirent
@@ -897,7 +897,7 @@ COMPAT_SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
if (buf.result)
error = buf.result;
fdput(f);
fdput_pos(f);
return error;
}
@@ -975,7 +975,7 @@ COMPAT_SYSCALL_DEFINE3(getdents, unsigned int, fd,
if (!access_ok(VERIFY_WRITE, dirent, count))
return -EFAULT;
f = fdget(fd);
f = fdget_pos(fd);
if (!f.file)
return -EBADF;
@@ -989,7 +989,7 @@ COMPAT_SYSCALL_DEFINE3(getdents, unsigned int, fd,
else
error = count - buf.count;
}
fdput(f);
fdput_pos(f);
return error;
}
@@ -1062,7 +1062,7 @@ COMPAT_SYSCALL_DEFINE3(getdents64, unsigned int, fd,
if (!access_ok(VERIFY_WRITE, dirent, count))
return -EFAULT;
f = fdget(fd);
f = fdget_pos(fd);
if (!f.file)
return -EBADF;
@@ -1077,7 +1077,7 @@ COMPAT_SYSCALL_DEFINE3(getdents64, unsigned int, fd,
else
error = count - buf.count;
}
fdput(f);
fdput_pos(f);
return error;
}
#endif /* __ARCH_WANT_COMPAT_SYS_GETDENTS64 */