[uml-devel] [PATCH 5/9] um: winch_interrupt() can happen inside of free_winch()
STALE5513d
From: Richard Weinberger <richard@nod.at>
Date: 2011-08-29 16:05:23
Also in:
lkml
Subsystem:
the rest, user-mode linux (uml) · Maintainers:
Linus Torvalds, Richard Weinberger, Anton Ivanov, Johannes Berg
From: Al Viro <redacted> ... so set winch->fd to -1 before doing free_irq(), to avoid having winch_interrupt() come from/during the latter and attempt to do reactivate_fd() on something that's already gone. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> --- arch/um/drivers/line.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index c5bff1d..91bf1894 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c@@ -725,6 +725,8 @@ struct winch { static void free_winch(struct winch *winch, int free_irq_ok) { + int fd = winch->fd; + winch->fd = -1; if (free_irq_ok) free_irq(WINCH_IRQ, winch);
@@ -732,8 +734,8 @@ static void free_winch(struct winch *winch, int free_irq_ok) if (winch->pid != -1) os_kill_process(winch->pid, 1); - if (winch->fd != -1) - os_close_file(winch->fd); + if (fd != -1) + os_close_file(fd); if (winch->stack != 0) free_stack(winch->stack, 0); kfree(winch);
--
1.7.6.1
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