title: ethernet:enic: Fix a use after free bug in enic_hard_start_xmit
description: In the Linux kernel, the following vulnerability has been resolved:
ethernet:enic: Fix a use after free bug in enic_hard_start_xmit
In enic_hard_start_xmit, it calls enic_queue_wq_skb(). Inside
enic_queue_wq_skb, if some error happens, the skb will be freed
by dev_kfree_skb(skb). But the freed skb is still used in
skb_tx_timestamp(skb).
My patch makes enic_queue_wq_skb() return error and goto spin_unlock()
incase of error. The solution is provided by Govind.
See https://lkml.org/lkml/2021/4/30/961.
affected:
{
product: Linux
vendor: Linux
defaultStatus: unaffected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions:
version: fb7516d42478, lessThan: 25a87b1f566b, status: affected, versionType: git
version: fb7516d42478, lessThan: f7f6f0777409, status: affected, versionType: git
version: fb7516d42478, lessThan: 7afdd6aba95c, status: affected, versionType: git
version: fb7516d42478, lessThan: 6892396ebf04, status: affected, versionType: git
version: fb7516d42478, lessThan: d90529392aaf, status: affected, versionType: git
version: fb7516d42478, lessThan: 643001b47adc, status: affected, versionType: git
}
{
product: Linux
vendor: Linux
defaultStatus: affected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions:
version: 4.16, status: affected
version: 0, lessThan: 4.16, status: unaffected, versionType: custom
version: 4.19.191, lessThanOrEqual: 4.19.*, status: unaffected, versionType: custom
version: 5.4.120, lessThanOrEqual: 5.4.*, status: unaffected, versionType: custom
version: 5.10.38, lessThanOrEqual: 5.10.*, status: unaffected, versionType: custom
version: 5.11.22, lessThanOrEqual: 5.11.*, status: unaffected, versionType: custom
version: 5.12.5, lessThanOrEqual: 5.12.*, status: unaffected, versionType: custom
version: 5.13, lessThanOrEqual: *, status: unaffected, versionType: original_commit_for_fix
}
