Hello,

syzbot has tested the proposed patch and the reproducer did not trigger crash:

Reported-and-tested-by: syzbot+cea71eec5d6de256d54d@syzkaller.appspotmail.com

Tested on:

commit:         e76397e4 iterate datamsg list
git tree:       https://github.com/hqj/hqjagain_test.git sctp_for_each_tx_datachunk
kernel config:  https://syzkaller.appspot.com/x/.config?x=6dfa02302d6db985
dashboard link: https://syzkaller.appspot.com/bug?extid=cea71eec5d6de256d54d
compiler:       clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)

Note: testing is done by a robot and is best-effort only.