locate_fd() may expand fdtable, so the fdtable pointer must be
reloaded after locate_fd(). Fixes bugme #4770.
Signed-off-by: Dipankar Sarma <[email protected]>
---
fs/fcntl.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletion(-)
diff -puN fs/fcntl.c~fix-dupfd-reacquire-fdt fs/fcntl.c
--- linux-2.6.12-mm1-fix/fs/fcntl.c~fix-dupfd-reacquire-fdt 2005-06-25 14:56:58.000000000 +0530
+++ linux-2.6.12-mm1-fix-dipankar/fs/fcntl.c 2005-06-25 14:58:26.000000000 +0530
@@ -118,9 +118,10 @@ static int dupfd(struct file *file, unsi
int fd;
spin_lock(&files->file_lock);
- fdt = files_fdtable(files);
fd = locate_fd(files, file, start);
if (fd >= 0) {
+ /* locate_fd() may have expanded fdtable, load the ptr */
+ fdt = files_fdtable(files);
FD_SET(fd, fdt->open_fds);
FD_CLR(fd, fdt->close_on_exec);
spin_unlock(&files->file_lock);
_
-
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