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| author | Sven Eckelmann <sven@narfation.org> | 2021-08-02 18:24:44 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-05 14:42:40 +0200 |
| commit | 112cedc8e600b668688eb809bf11817adec58ddc (patch) | |
| tree | bc04589a1fc33416a3d8ecab7e5925b26e764be0 /fs/debugfs | |
| parent | fac58b4a5287c9d37c39d09d9bdc80846b744649 (diff) | |
| download | linux-rpi-112cedc8e600b668688eb809bf11817adec58ddc.tar.gz linux-rpi-112cedc8e600b668688eb809bf11817adec58ddc.tar.bz2 linux-rpi-112cedc8e600b668688eb809bf11817adec58ddc.zip | |
debugfs: Return error during {full/open}_proxy_open() on rmmod
If a kernel module gets unloaded then it printed report about a leak before
commit 275678e7a9be ("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: 275678e7a9be ("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>
Diffstat (limited to 'fs/debugfs')
| -rw-r--r-- | fs/debugfs/file.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c index df00231d3ecc..7d162b0efbf0 100644 --- a/fs/debugfs/file.c +++ b/fs/debugfs/file.c @@ -179,8 +179,10 @@ static int open_proxy_open(struct inode *inode, struct file *filp) if (!fops_get(real_fops)) { #ifdef CONFIG_MODULES if (real_fops->owner && - real_fops->owner->state == MODULE_STATE_GOING) + real_fops->owner->state == MODULE_STATE_GOING) { + r = -ENXIO; goto out; + } #endif /* Huh? Module did not clean up after itself at exit? */ @@ -314,8 +316,10 @@ static int full_proxy_open(struct inode *inode, struct file *filp) if (!fops_get(real_fops)) { #ifdef CONFIG_MODULES if (real_fops->owner && - real_fops->owner->state == MODULE_STATE_GOING) + real_fops->owner->state == MODULE_STATE_GOING) { + r = -ENXIO; goto out; + } #endif /* Huh? Module did not cleanup after itself at exit? */ |