Re: [PATCH v3 1/4] poll() exits too early with EFAULT if 1st arg is NULL
Joachim Schmitz wrote:
Joachim Schmitz wrote:
If poll() is used as a milli-second sleep, like in help.c, by passing
a NULL in the 1st and a 0 in the 2nd arg, it exits with EFAULT.
As per Paolo Bonzini, the original author, this is a bug and to be
fixed like in this commit, which is not to exit if the 2nd arg is 0.
Signed-off-by: Joachim Schmitz j...@schmitz-digital.de
---
compat/win32/poll.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/compat/win32/poll.c b/compat/win32/poll.c
index 403eaa7..9e7a25c 100644
--- a/compat/win32/poll.c
+++ b/compat/win32/poll.c
@@ -349,7 +349,7 @@ poll (struct pollfd *pfd, nfds_t nfd, int
timeout)
/* EFAULT is not necessary to implement, but let's do it in the
simplest case. */
- if (!pfd)
+ if (!pfd nfd)
{
errno = EFAULT;
return -1;
Actually this one is not needed for win32 (nor does win32 suffer from
a similar bug), so should probably better get added after patch 2/2
(or as part of it), the move to compat/poll/.
It just got added that was to gnulib, with a commit message of:
don't exit early if NULL is the 1st arg to poll(),
but nfd is 0. In that case poll should behave like select.
Bye, Jojo
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Re: [PATCH v3 1/4] poll() exits too early with EFAULT if 1st arg is NULL
Joachim Schmitz wrote:
If poll() is used as a milli-second sleep, like in help.c, by passing
a NULL in the 1st and a 0 in the 2nd arg, it exits with EFAULT.
As per Paolo Bonzini, the original author, this is a bug and to be
fixed like in this commit, which is not to exit if the 2nd arg is 0.
Signed-off-by: Joachim Schmitz j...@schmitz-digital.de
---
compat/win32/poll.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/compat/win32/poll.c b/compat/win32/poll.c
index 403eaa7..9e7a25c 100644
--- a/compat/win32/poll.c
+++ b/compat/win32/poll.c
@@ -349,7 +349,7 @@ poll (struct pollfd *pfd, nfds_t nfd, int timeout)
/* EFAULT is not necessary to implement, but let's do it in the
simplest case. */
- if (!pfd)
+ if (!pfd nfd)
{
errno = EFAULT;
return -1;
Actually this one is not needed for win32 (nor does win32 suffer from a
similar bug), so should probably better get added after patch 2/2 (or as
part of it), the move to compat/poll/.
Bye, Jojo
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RE: [PATCH v3 1/4] poll() exits too early with EFAULT if 1st arg is NULL
If poll() is used as a milli-second sleep, like in help.c, by passing a NULL
in the 1st and a 0 in the 2nd arg, it exits with EFAULT.
As per Paolo Bonzini, the original author, this is a bug and to be fixed like
in this commit, which is not to exit if the 2nd arg is 0.
Signed-off-by: Joachim Schmitz j...@schmitz-digital.de
---
compat/win32/poll.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/compat/win32/poll.c b/compat/win32/poll.c
index 403eaa7..9e7a25c 100644
--- a/compat/win32/poll.c
+++ b/compat/win32/poll.c
@@ -349,7 +349,7 @@ poll (struct pollfd *pfd, nfds_t nfd, int timeout)
/* EFAULT is not necessary to implement, but let's do it in the
simplest case. */
- if (!pfd)
+ if (!pfd nfd)
{
errno = EFAULT;
return -1;
--
1.7.12
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