fs/sysv: Null check to prevent null-ptr-deref bug

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commit ea2b62f305 upstream.

sb_getblk(inode->i_sb, parent) return a null ptr and taking lock on
that leads to the null-ptr-deref bug.

Reported-by: syzbot+aad58150cbc64ba41bdc@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=aad58150cbc64ba41bdc
Signed-off-by: Prince Kumar Maurya <princekumarmaurya06@gmail.com>
Message-Id: <20230531013141.19487-1-princekumarmaurya06@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Prince Kumar Maurya 2023-05-30 18:31:41 -07:00 • committed by Greg Kroah-Hartman

parent ccc6de4d4f

commit 1416eebaad

1 changed files with 4 additions and 0 deletions

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fs/sysv/itree.c

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