CVE-2022-50676
Description
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.
How to fix
- Linux Linux5d2ba255e93211e541373469dffbda7c99dfa0e5, 2425007c0967a7c04b0dee7cce05ecf0ca869ad1, e3cb25d3ad08f5dbd53ce2b31720cad529944322, 360aa7219285fac63dab99706a16f2daf3222abe, da349221c4d2d4ac5f606c1c3b36d4ef0b3e6a0c, 30bfa5aa7228eb1e67663d67e553627e572cc717, c380c28ab9b15fc53565909c814f6dd3e7f77c4b, afe7053c390fe8ff27d0c2ceaece5625283044ba, a91b750fd6629354460282bbf5146c01b05c4859 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | ac3615e7f3cffe2a1a6b25172dfd09e138593d82 ≤ v < 5d2ba255e93211e541373469dffbda7c99dfa0e5, ac3615e7f3cffe2a1a6b25172dfd09e138593d82 ≤ v < 2425007c0967a7c04b0dee7cce05ecf0ca869ad1, ac3615e7f3cffe2a1a6b25172dfd09e138593d82 ≤ v < e3cb25d3ad08f5dbd53ce2b31720cad529944322, ac3615e7f3cffe2a1a6b25172dfd09e138593d82 ≤ v < 360aa7219285fac63dab99706a16f2daf3222abe, ac3615e7f3cffe2a1a6b25172dfd09e138593d82 ≤ v < da349221c4d2d4ac5f606c1c3b36d4ef0b3e6a0c, ac3615e7f3cffe2a1a6b25172dfd09e138593d82 ≤ v < 30bfa5aa7228eb1e67663d67e553627e572cc717, ac3615e7f3cffe2a1a6b25172dfd09e138593d82 ≤ v < c380c28ab9b15fc53565909c814f6dd3e7f77c4b, ac3615e7f3cffe2a1a6b25172dfd09e138593d82 ≤ v < afe7053c390fe8ff27d0c2ceaece5625283044ba, ac3615e7f3cffe2a1a6b25172dfd09e138593d82 ≤ v < a91b750fd6629354460282bbf5146c01b05c4859, 4.8 | 5d2ba255e93211e541373469dffbda7c99dfa0e5, 2425007c0967a7c04b0dee7cce05ecf0ca869ad1, e3cb25d3ad08f5dbd53ce2b31720cad529944322, 360aa7219285fac63dab99706a16f2daf3222abe, da349221c4d2d4ac5f606c1c3b36d4ef0b3e6a0c, 30bfa5aa7228eb1e67663d67e553627e572cc717, c380c28ab9b15fc53565909c814f6dd3e7f77c4b, afe7053c390fe8ff27d0c2ceaece5625283044ba, a91b750fd6629354460282bbf5146c01b05c4859 |
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