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charset="utf-8" Content-Transfer-Encoding: quoted-printable On Wed, 21 Oct 2026 23:22:50 +0200, G=C3=BCnther Noack wrote: > The ETOOMANYREFS error is detected in too_many_unix_fds() in > net/unix/af_unix.c when the user's (not the processes') in-flight FDs > exceed RLIMIT_NOFILE, and the process has neither CAP_SYS_RESOURCE nor > CAP_SYS_ADMIN. The error is raised when all of the following > (simplified) conditions are true: >=20 > * user->unix_inflight > task_rlimit(p, RLIMIT_NOFILE) > * !capable(CAP_SYS_RESOURCE) > * !capable(CAP_SYS_ADMIN) >=20 > The check was introduced in linux.git 712f4aad406b (2016-01-11; "unix: > properly account for FDs passed over unix sockets"). >=20 > Fixes: dc4eea68b565 (2016-12-17; "unix.7: Document ETOOMANYREFS for SCM_R= IGHTS send exceeding RLIMIT_NOFILE limit") > Cc: Michael Kerrisk > Cc: Willy Tarreau > Cc: Kuniyuki Iwashima > Assisted-by: LLM > Signed-off-by: G=C3=BCnther Noack Reviewed-by: Kuniyuki Iwashima