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authorVadim Lobanov <vlobanov@speakeasy.net>2006-12-10 02:21:09 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-10 09:57:21 -0800
commitf3d19c90fb117a5f080310a4592929aa8e1ad8e9 (patch)
tree80dee984c0b9f06d458257e54dc7742c981d2b05 /kernel
parent5eb6c7a2ab413dea1ee6c08dd58263a1c2c2efa3 (diff)
downloadop-kernel-dev-f3d19c90fb117a5f080310a4592929aa8e1ad8e9.zip
op-kernel-dev-f3d19c90fb117a5f080310a4592929aa8e1ad8e9.tar.gz
[PATCH] fdtable: Delete pointless code in dup_fd()
The dup_fd() function creates a new files_struct and fdtable embedded inside that files_struct, and then possibly expands the fdtable using expand_files(). The out_release error path is invoked when expand_files() returns an error code. However, when this attempt to expand fails, the fdtable is left in its original embedded form, so it is pointless to try to free the associated fdarray and fdsets. Signed-off-by: Vadim Lobanov <vlobanov@speakeasy.net> Cc: Dipankar Sarma <dipankar@in.ibm.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/fork.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 086e172..30eab4f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -711,8 +711,10 @@ static struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
old_fds = old_fdt->fd;
new_fds = new_fdt->fd;
- memcpy(new_fdt->open_fds->fds_bits, old_fdt->open_fds->fds_bits, open_files/8);
- memcpy(new_fdt->close_on_exec->fds_bits, old_fdt->close_on_exec->fds_bits, open_files/8);
+ memcpy(new_fdt->open_fds->fds_bits,
+ old_fdt->open_fds->fds_bits, open_files/8);
+ memcpy(new_fdt->close_on_exec->fds_bits,
+ old_fdt->close_on_exec->fds_bits, open_files/8);
for (i = open_files; i != 0; i--) {
struct file *f = *old_fds++;
@@ -745,14 +747,11 @@ static struct files_struct *dup_fd(struct files_struct *oldf, int *errorp)
memset(&new_fdt->close_on_exec->fds_bits[start], 0, left);
}
-out:
return newf;
out_release:
- free_fdset (new_fdt->close_on_exec, new_fdt->max_fdset);
- free_fdset (new_fdt->open_fds, new_fdt->max_fdset);
- free_fd_array(new_fdt->fd, new_fdt->max_fds);
kmem_cache_free(files_cachep, newf);
+out:
return NULL;
}
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