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[Qemu-devel] [PATCH] linux-user: fix undefined shift in copy_to_user_fds
From: |
Andreas Schwab |
Subject: |
[Qemu-devel] [PATCH] linux-user: fix undefined shift in copy_to_user_fdset |
Date: |
Tue, 09 Apr 2013 13:02:34 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
If TARGET_ABI_BITS is bigger than 32 we shift by more than the size of int.
Signed-off-by: Andreas Schwab <address@hidden>
---
linux-user/syscall.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index fa3039f..5abc16f 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -922,7 +922,7 @@ static inline abi_long copy_to_user_fdset(abi_ulong
target_fds_addr,
for (i = 0; i < nw; i++) {
v = 0;
for (j = 0; j < TARGET_ABI_BITS; j++) {
- v |= ((FD_ISSET(k, fds) != 0) << j);
+ v |= ((abi_ulong)(FD_ISSET(k, fds) != 0) << j);
k++;
}
__put_user(v, &target_fds[i]);
--
1.8.2.1
--
Andreas Schwab, SUSE Labs, address@hidden
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
- [Qemu-devel] [PATCH] linux-user: fix undefined shift in copy_to_user_fdset,
Andreas Schwab <=