linux-stable/fs/debugfs
Sven Eckelmann c0faa638f0 debugfs: Return error during {full/open}_proxy_open() on rmmod
[ Upstream commit 112cedc8e6 ]

If a kernel module gets unloaded then it printed report about a leak before
commit 275678e7a9 ("debugfs: Check module state before warning in
{full/open}_proxy_open()"). An additional check was added in this commit to
avoid this printing. But it was forgotten that the function must return an
error in this case because it was not actually opened.

As result, the systems started to crash or to hang when a module was
unloaded while something was trying to open a file.

Fixes: 275678e7a9 ("debugfs: Check module state before warning in {full/open}_proxy_open()")
Cc: Taehee Yoo <ap420073@gmail.com>
Reported-by: Mário Lopes <ml@simonwunderlich.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Link: https://lore.kernel.org/r/20210802162444.7848-1-sven@narfation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-09-15 09:47:33 +02:00
..
file.c debugfs: Return error during {full/open}_proxy_open() on rmmod 2021-09-15 09:47:33 +02:00
inode.c debugfs: do not attempt to create a new file before the filesystem is initalized 2021-03-04 10:26:10 +01:00
internal.h debugfs: Remove redundant license text 2017-11-07 20:25:03 +01:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00