* [PATCH] Fix compat_sys_preadv64v2/compat_sys_pwritev64v2
@ 2018-10-31 18:41 H.J. Lu
0 siblings, 0 replies; 2+ messages in thread
From: H.J. Lu @ 2018-10-31 18:41 UTC (permalink / raw)
To: LKML, H. Peter Anvin
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Update compat_sys_preadv64v2 and compat_sys_pwritev64v2 to handle the
offset argument == -1, which should use and update the the current file
offset.
--
H.J.
[-- Attachment #2: 0001-Fix-compat_sys_preadv64v2-compat_sys_pwritev64v2.patch --]
[-- Type: text/x-patch, Size: 1237 bytes --]
From 934a68be8a092dba9558bdf8025239934efb5d7e Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Wed, 3 Oct 2018 08:07:18 -0700
Subject: [PATCH] Fix compat_sys_preadv64v2/compat_sys_pwritev64v2
Update compat_sys_preadv64v2 and compat_sys_pwritev64v2 to handle the
offset argument == -1, which should use and update the the current file
offset.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
---
fs/read_write.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/read_write.c b/fs/read_write.c
index 39b4a21dd933..a61111bdd8c9 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1241,6 +1241,9 @@ COMPAT_SYSCALL_DEFINE5(preadv64v2, unsigned long, fd,
const struct compat_iovec __user *,vec,
unsigned long, vlen, loff_t, pos, rwf_t, flags)
{
+ if (pos == -1)
+ return do_compat_readv(fd, vec, vlen, flags);
+
return do_compat_preadv64(fd, vec, vlen, pos, flags);
}
#endif
@@ -1347,6 +1350,9 @@ COMPAT_SYSCALL_DEFINE5(pwritev64v2, unsigned long, fd,
const struct compat_iovec __user *,vec,
unsigned long, vlen, loff_t, pos, rwf_t, flags)
{
+ if (pos == -1)
+ return do_compat_writev(fd, vec, vlen, flags);
+
return do_compat_pwritev64(fd, vec, vlen, pos, flags);
}
#endif
--
2.17.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH] Fix compat_sys_preadv64v2/compat_sys_pwritev64v2
@ 2018-10-03 15:10 H.J. Lu
0 siblings, 0 replies; 2+ messages in thread
From: H.J. Lu @ 2018-10-03 15:10 UTC (permalink / raw)
To: linux-kernel
Update compat_sys_preadv64v2 and compat_sys_pwritev64v2 to handle the
offset argument == -1, which should use and update the the current file
offset.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
---
fs/read_write.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/read_write.c b/fs/read_write.c
index 153f8f690490..c1d183862c13 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1241,6 +1241,9 @@ COMPAT_SYSCALL_DEFINE5(preadv64v2, unsigned long, fd,
const struct compat_iovec __user *,vec,
unsigned long, vlen, loff_t, pos, rwf_t, flags)
{
+ if (pos == -1)
+ return do_compat_readv(fd, vec, vlen, flags);
+
return do_compat_preadv64(fd, vec, vlen, pos, flags);
}
#endif
@@ -1347,6 +1350,9 @@ COMPAT_SYSCALL_DEFINE5(pwritev64v2, unsigned long, fd,
const struct compat_iovec __user *,vec,
unsigned long, vlen, loff_t, pos, rwf_t, flags)
{
+ if (pos == -1)
+ return do_compat_writev(fd, vec, vlen, flags);
+
return do_compat_pwritev64(fd, vec, vlen, pos, flags);
}
#endif
--
2.17.1
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