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authorKirill Korotaev <dev@sw.ru>2006-09-29 02:00:05 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-29 09:18:12 -0700
commit3b9b8ab65d8eed784b9164d03807cb2bda7b5cd6 (patch)
tree104c7b01768acd7e152cbf66e4868a73804e8af9 /fs/binfmt_elf.c
parentfc09561d6392771a392dea55c287de7e849b6b63 (diff)
downloadconfigs-3b9b8ab65d8eed784b9164d03807cb2bda7b5cd6.tar.gz
[PATCH] Fix unserialized task->files changing
Fixed race on put_files_struct on exec with proc. Restoring files on current on error path may lead to proc having a pointer to already kfree-d files_struct. ->files changing at exit.c and khtread.c are safe as exit_files() makes all things under lock. Found during OpenVZ stress testing. [akpm@osdl.org: add export] Signed-off-by: Pavel Emelianov <xemul@openvz.org> Signed-off-by: Kirill Korotaev <dev@openvz.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/binfmt_elf.c')
-rw-r--r--fs/binfmt_elf.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index dfd8cfb7fb5..bb43da5cde5 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1038,10 +1038,8 @@ out_free_interp:
out_free_file:
sys_close(elf_exec_fileno);
out_free_fh:
- if (files) {
- put_files_struct(current->files);
- current->files = files;
- }
+ if (files)
+ reset_files_struct(current, files);
out_free_ph:
kfree(elf_phdata);
goto out;