Description

In the Linux kernel, the following vulnerability has been resolved: media: anysee: fix null-ptr-deref in anysee_master_xfer In anysee_master_xfer, msg is controlled by user. When msg[i].buf is null and msg[i].len is zero, former checks on msg[i].buf would be passed. Malicious data finally reach anysee_master_xfer. If accessing msg[i].buf[0] without sanity check, null ptr deref would happen. We add check on msg[i].len to prevent crash. Similar commit: commit 0ed554fd769a ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()") [hverkuil: add spaces around +]

References 8

• git.kernel.org https://git.kernel.org/stable/c/14b94154a72388b57221a2a73795c0ea61a95373
• git.kernel.org https://git.kernel.org/stable/c/3dd5846a873938ec7b6d404ec27662942cd8f2ef
• git.kernel.org https://git.kernel.org/stable/c/4a9763d2bc4a6d6fab42555b9c0b2eefa32585ac
• git.kernel.org https://git.kernel.org/stable/c/5975dbbb7ad0767eaabd15d2c37a739ac76acb00
• git.kernel.org https://git.kernel.org/stable/c/73c0b224ceeba12dee2a7a8cbc147648da0b2e63
• git.kernel.org https://git.kernel.org/stable/c/8dc5b370254abc10f0cb4141d90cecf7ce465472
• git.kernel.org https://git.kernel.org/stable/c/c30411266fd67ea3c02a05c157231654d5a3bdc9
• git.kernel.org https://git.kernel.org/stable/c/e04affec2506ff5c12a18d78d7e694b3556a8982

Remediation