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| author | Konstantin Khlebnikov <khlebnikov@openvz.org> | 2012-12-14 15:03:10 +0400 |
|---|---|---|
| committer | Borislav Petkov <bpetkov@suse.de> | 2013-01-07 17:42:58 +0100 |
| commit | 311bd84247ee0bedae6cdfbfc5e2c3450f9decd1 (patch) | |
| tree | 23e7218b9e23c33ca9e8534ddbb05664f896fab3 /drivers/edac | |
| parent | d1c3ed669a2d452cacfb48c2d171a1f364dae2ed (diff) | |
| download | linux-311bd84247ee0bedae6cdfbfc5e2c3450f9decd1.tar.gz linux-311bd84247ee0bedae6cdfbfc5e2c3450f9decd1.tar.bz2 linux-311bd84247ee0bedae6cdfbfc5e2c3450f9decd1.zip | |
EDAC: Fix kernel panic on module unloading
This patch fixes use-after-free and double-free bugs in
edac_mc_sysfs_exit(). mci_pdev has single reference and put_device()
calls mc_attr_release() which calls kfree(). The following
device_del() works with already released memory. An another kfree() in
edac_mc_sysfs_exit() releses the same memory again. Great.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: stable@vger.kernel.org # 3.[67]
Cc: Denis Kirjanov <kirjanov@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Link: http://lkml.kernel.org/r/20121214110310.11019.21098.stgit@zurg
Signed-off-by: Borislav Petkov <bp@alien8.de>
Diffstat (limited to 'drivers/edac')
| -rw-r--r-- | drivers/edac/edac_mc_sysfs.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index de2df92f9c77..a3b0119ecb00 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -1159,8 +1159,7 @@ int __init edac_mc_sysfs_init(void) void __exit edac_mc_sysfs_exit(void) { - put_device(mci_pdev); device_del(mci_pdev); + put_device(mci_pdev); edac_put_sysfs_subsys(); - kfree(mci_pdev); } |