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| author | Tetsuo Handa <[email protected]> | 2021-10-02 09:23:02 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2021-10-02 13:29:20 +0000 |
| commit | 06cc978d3ff226072780f74897800b33e78abb57 (patch) | |
| tree | f8a7767f98974d2bea074848be82708931e5795a /drivers/fpga/fpga-bridge.c | |
| parent | nbd: use shifts rather than multiplies (diff) | |
| download | kernel-06cc978d3ff226072780f74897800b33e78abb57.tar.gz kernel-06cc978d3ff226072780f74897800b33e78abb57.zip | |
block: genhd: fix double kfree() in __alloc_disk_node()
syzbot is reporting use-after-free read at bdev_free_inode() [1], for
kfree() from __alloc_disk_node() is called before bdev_free_inode()
(which is called after RCU grace period) reads bdev->bd_disk and calls
kfree(bdev->bd_disk).
Fix use-after-free read followed by double kfree() problem
by making sure that bdev->bd_disk is NULL when calling iput().
Link: https://syzkaller.appspot.com/bug?extid=8281086e8a6fbfbd952a [1]
Reported-by: syzbot <[email protected]>
Signed-off-by: Tetsuo Handa <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'drivers/fpga/fpga-bridge.c')
0 files changed, 0 insertions, 0 deletions