From: Silesh C V <svellattu@xxxxxxxxxx>
Subject: coredump: fix the setting of PF_DUMPCORE
commit 079148b91 ("coredump: factor out the setting of PF_DUMPCORE")
cleaned up the setting of PF_DUMPCORE by removing it from all the
linux_binfmt->core_dump() and moving it to zap_threads().But this ended up
clearing all the previously set flags. This causes issues during core
generation when tsk->flags is checked again (eg. for PF_USED_MATH to dump
floating point registers). Fix this.
Signed-off-by: Silesh C V <svellattu@xxxxxxxxxx>
Acked-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Mandeep Singh Baines <msb@xxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [3.10+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/coredump.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/coredump.c~coredump-fix-the-setting-of-pf_dumpcore fs/coredump.c
--- a/fs/coredump.c~coredump-fix-the-setting-of-pf_dumpcore
+++ a/fs/coredump.c
@@ -306,7 +306,7 @@ static int zap_threads(struct task_struc
if (unlikely(nr < 0))
return nr;
- tsk->flags = PF_DUMPCORE;
+ tsk->flags |= PF_DUMPCORE;
if (atomic_read(&mm->mm_users) == nr + 1)
goto done;
/*
_
--
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