In the Linux kernel, the following vulnerability has been resolved:
net: rds: don't hold sock lock when cancelling work from rds_tcp_reset_callbacks()
syzbot is reporting lockdep warning at rds_tcp_reset_callbacks() [1], for
commit ac3615e7f3cffe2a ("RDS: TCP: Reduce code duplication in
rds_tcp_reset_callbacks()") added cancel_delayed_work_sync() into a section
protected by lock_sock() without realizing that rds_send_xmit() might call
lock_sock().
We don't need to protect cancel_delayed_work_sync() using lock_sock(), for
even if rds_{send,recv}_worker() re-queued this work while __flush_work()
from cancel_delayed_work_sync() was waiting for this work to complete,
retried rds_{send,recv}_worker() is no-op due to the absence of RDS_CONN_UP
bit.
CVSS
7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
from ac3615e7f3cffe2a1a6b25172dfd09e138593d82 before 5d2ba255e93211e541373469dffbda7c99dfa0e5; from ac3615e7f3cffe2a1a6b25172dfd09e138593d82 before 2425007c0967a7c04b0dee7cce05ecf0ca869ad1; from ac3615e7f3cffe2a1a6b25172dfd09e138593d82 before e3cb25d3ad08f5dbd53ce2b31720cad529944322; from ac3615e7f3cffe2a1a6b25172dfd09e138593d82 before 360aa7219285fac63dab99706a16f2daf3222abe; from ac3615e7f3cffe2a1a6b25172dfd09e138593d82 before da349221c4d2d4ac5f606c1c3b36d4ef0b3e6a0c; from ac3615e7f3cffe2a1a6b25172dfd09e138593d82 before 30bfa5aa7228eb1e67663d67e553627e572cc717; from ac3615e7f3cffe2a1a6b25172dfd09e138593d82 before c380c28ab9b15fc53565909c814f6dd3e7f77c4b; from ac3615e7f3cffe2a1a6b25172dfd09e138593d82 before afe7053c390fe8ff27d0c2ceaece5625283044ba; and 1 more ranges
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.
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CVE-2022-50676: net: rds: don't hold sock lock when cancelling work from rds_tcp_reset_callbacks() | InfoSec Signals