Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix usage of page_frag_cache nvme uses page_frag_cache to preallocate PDU for each preallocated request of block device. Block devices are created in parallel threads, consequently page_frag_cache is used in not thread-safe manner. That leads to incorrect refcounting of backstore pages and premature free. That can be catched by !sendpage_ok inside network stack: WARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310. tcp_sendmsg_locked+0x782/0xce0 tcp_sendmsg+0x27/0x40 sock_sendmsg+0x8b/0xa0 nvme_tcp_try_send_cmd_pdu+0x149/0x2a0 Then random panic may occur. Fix that by serializing the usage of page_frag_cache.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4e893ca8117022de68ce1b61c0309e3d17bb8a25 before d19f98c79f1b7e09e4cdf5c20d626e571e487467; affected 4e893ca8117022de68ce1b61c0309e3d17bb8a25 before 64561afb42d8390695bf810d9bbd087cbca00291; affected 4e893ca8117022de68ce1b61c0309e3d17bb8a25 before 0a9750263ffacbbd2048a391fd4bd22e2146c57d; affected 4e893ca8117022de68ce1b61c0309e3d17bb8a25 before 6e4cf281558709b92ec2ca3054fe2ffc69266ef9; affected 4e893ca8117022de68ce1b61c0309e3d17bb8a25 before 36ac05f7cfd59d90c597071304b14e98090d5dd1; affected c57506918b078ecab7dedebef0f34dbc23ae2e46; affected 6.6.160 before 6.7 |
| Linux / Linux | affected 6.12; unaffected 0 before 6.12; unaffected 6.12.108 through 6.12.*; unaffected 6.18.49 through 6.18.*; unaffected 7.1.13 through 7.1.*; unaffected 7.2.3 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d19f98c79f1b7e09e4cdf5c20d626e571e487467
- https://git.kernel.org/stable/c/64561afb42d8390695bf810d9bbd087cbca00291
- https://git.kernel.org/stable/c/0a9750263ffacbbd2048a391fd4bd22e2146c57d
- https://git.kernel.org/stable/c/6e4cf281558709b92ec2ca3054fe2ffc69266ef9
- https://git.kernel.org/stable/c/36ac05f7cfd59d90c597071304b14e98090d5dd1