Description: Out-of-bound access in f2fs_iget() when mounting a corrupted f2fs image
References:
 https://bugzilla.kernel.org/show_bug.cgi?id=200173
 https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?h=f2fs-dev&id=190286a242344d42aad83c8e70169d6d72a63d05
Notes:
 bwh> Introduced in 4.14-rc1 by commit 7a2af766af15 "f2fs: enhance on-disk
 bwh> inode structure scalability"
Bugs:
upstream: released (4.19-rc1) [76d56d4ab4f2a9e4f085c7d77172194ddaccf7d2]
4.19-upstream-stable: N/A "Fixed before branch point"
4.9-upstream-stable: N/A "Vulnerable code not present"
3.16-upstream-stable: N/A "Vulnerable code not present"
sid: released (4.18.10-1)
4.9-stretch-security: N/A "Vulnerable code not present"
3.16-jessie-security: N/A "Vulnerable code not present"