Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sctp: add a refcnt in sctp_stream_priorities to avoid a nested loop With this refcnt added in sctp_stream_priorities, we don't need to traverse all streams to check if the prio is used by other streams when freeing one stream's prio in sctp_sched_prio_free_sid(). This can avoid a nested loop (up to 65535 * 65535), which may cause a stuck as Ying reported: watchdog: BUG: soft lockup - CPU#23 stuck for 26s! [ksoftirqd/23:136] Call Trace: <TASK> sctp_sched_prio_free_sid+0xab/0x100 [sctp] sctp_stream_free_ext+0x64/0xa0 [sctp] sctp_stream_free+0x31/0x50 [sctp] sctp_association_free+0xa5/0x200 [sctp] Note that it doesn't need to use refcount_t type for this counter, as its accessing is always protected under the sock lock. v1->v2: - add a check in sctp_sched_prio_set to avoid the possible prio_head refcnt overflow.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a7555681e50bdebed2c40ff7404ee73c2e932993 before cec326443f01283ef68ea00c06ea073b1835a562; affected 176ee6c673ccd118e9392fd2dbb165423bdb99ca before 8ee401f89cdb10f39098c0656d695b2bc4052100; affected 0dfb9a566327182387c90100ea54d8426cee8c67 before bf5540cbd20e2dae2c81ab9b31deef41ef147d0a; affected 9ed7bfc79542119ac0a9e1ce8a2a5285e43433e9 before 03c3a5584a0a29821e59b7834635ce823050caaa; affected 9ed7bfc79542119ac0a9e1ce8a2a5285e43433e9 before 6d529928ea212127851a2df8c40d822237ca946b; affected 9ed7bfc79542119ac0a9e1ce8a2a5285e43433e9 before 68ba44639537de6f91fe32783766322d41848127; affected fa20f88271259d42ebe66f0a8c4c20199e888c99; affected 5.4.226 before 5.4.235; affected 5.10.158 before 5.10.173; affected 5.15.82 before 5.15.100; affected 6.0.12 before 6.1 |
| Linux / Linux | affected 6.1; unaffected 0 before 6.1; unaffected 5.4.235 through 5.4.*; unaffected 5.10.173 through 5.10.*; unaffected 5.15.100 through 5.15.*; unaffected 6.1.18 through 6.1.*; unaffected 6.2.5 through 6.2.*; unaffected 6.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/cec326443f01283ef68ea00c06ea073b1835a562
- https://git.kernel.org/stable/c/8ee401f89cdb10f39098c0656d695b2bc4052100
- https://git.kernel.org/stable/c/bf5540cbd20e2dae2c81ab9b31deef41ef147d0a
- https://git.kernel.org/stable/c/03c3a5584a0a29821e59b7834635ce823050caaa
- https://git.kernel.org/stable/c/6d529928ea212127851a2df8c40d822237ca946b
- https://git.kernel.org/stable/c/68ba44639537de6f91fe32783766322d41848127