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22f8aa3596
cmd->dumpit callback can return a negative errno, causing an infinite
loop due to the while(len) condition. As the loop never terminates,
genl_mutex is never released, and other tasks waiting on it starve in D
state.
Check dumpit's return value, propagate it and jump to err_out on error.
Reported-by: syzbot+85d0bec020d805014a3a@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=85d0bec020d805014a3a
Fixes: d0796d1ef6 ("tipc: convert legacy nl bearer dump to nl compat")
Signed-off-by: Helen Koike <koike@igalia.com>
Reviewed-by: Tung Nguyen <tung.quang.nguyen@est.tech
Reviewed-by: Tung Nguyen <tung.quang.nguyen@est.tech>
Link: https://patch.msgid.link/20260713204940.647668-1-koike@igalia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>