Date: Wed, 13 May 2026 15:38:01 +0000 From: Shawn Webb <shawn.webb@hardenedbsd.org> To: freebsd-current@freebsd.org Subject: `tail -F somefile` and ZFS weirdness Message-ID: <ivnap4qielgtl4opglere7xu4fb44wxomp2nziezhvmhtl73ab@dnekfaezlmwk>
index | next in thread | raw e-mail
[-- Attachment #1 --] Hey all, I just noticed this in a bhyve VM running HardenedBSD 16-CURRENT. My `uname -a` aligns with FreeBSD commit b76b05c04cc9ed2cd053c7b367c92628447ede6f. (so pretend the git commit has in my `uname -a` is FreeBSD's b76b05c04cc9ed2cd053c7b367c92628447ede6f commit.) I don't recall seeing this message before, so I suspect it might have been introduced relatively recently. ==== BEGIN LOG ==== $ uname -a FreeBSD hbsd-current-02 16.0-CURRENT FreeBSD 16.0-CURRENT #5 hardened/current/master-n196117-464cdf02df98-dirty: Wed May 13 01:12:14 UTC 2026 shawn@hbsd-current-02:/usr/obj/usr/src/amd64.amd64/sys/HARDENEDBSD amd64 $ tail -n 21 /var/log/messages rms_rlock with the following non-sleepable locks held: exclusive sleep mutex kqueue (kqueue) r = 0 (0xfffff80001d0b400) locked @ /usr/src/sys/kern/kern_event.c:2586 stack backtrace: #0 0xffffffff80c921dc at witness_debugger+0x6c #1 0xffffffff80c93adc at witness_warn+0x4bc #2 0xffffffff80c0e10f at rms_rlock+0x1f #3 0xffffffff82799a6b at zfs_freebsd_getattr+0x11b #4 0xffffffff8127dba7 at VOP_GETATTR_APV+0x57 #5 0xffffffff80d2a7db at vn_getsize_locked+0x7b #6 0xffffffff80d30b6d at filt_vfsread+0x8d #7 0xffffffff80bb4d06 at knote+0xd6 #8 0xffffffff80d28a48 at vop_read_post+0x48 #9 0xffffffff8127e07a at VOP_READ_APV+0x9a #10 0xffffffff80d450f2 at vn_read+0x242 #11 0xffffffff80d44df5 at vn_io_fault_doio+0x55 #12 0xffffffff80d3ff2f at vn_io_fault1+0x19f #13 0xffffffff80d3d040 at vn_io_fault+0x190 #14 0xffffffff80c97e95 at dofileread+0x85 #15 0xffffffff80c97852 at sys_read+0x132 #16 0xffffffff811a7974 at amd64_syscall+0x184 #17 0xffffffff81175f0b at fast_syscall_common+0xf8 ==== END LOG ==== Thanks, -- Shawn Webb Cofounder / Security Engineer HardenedBSD Signal Username: shawn_webb.74 Tor-ified Signal: +1 303-901-1600 / shawn_webb_opsec.50 https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/raw/master/Shawn_Webb/03A4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEA6TL67gupaZ9nzhT/y5nonf44foFAmoEmtAACgkQ/y5nonf4 4fqu1Q//eizWINYNEtgqUuNlIGTGDaJ5Qwr0vI9uOFK9YOISMgzszputDPClMDIL neCdKU+SizyJUnLsP0SvOgVPJ4oZgyssin6IoCO69qJwfGAINGd4jl3jQcCBqiBP +riwyWslrsOD6P1QYcESzIGD5bsZCl3IfdQwo87nf0YA2h9R5nKv7FNvpZGxYPWM 3M37jgcNQ9U6pjXZceWowh7422rrYElEYGM8qg7g52D87/RGOkTEbMmaiE4Y1z9C 2QgquUYW2q6oyZa0OFjSfDKwJcUKVO4dI/klUhin7y1TwpZWUESe6AiW3pNxGErb IWbmf54gR52b5rCZTIDvkOe0ZNJEwTJ6RhrFcRG43jscebSIel8cB4eV6cxqo6q0 IggzIFDLLgOvYOo8BU/a631TDiceio8jeJZ0hSBfbkd6GeCxmKrjd8DMvVwDD/RY 2G/9eGtTNsnSrKa3otPGtuX7yDFYEC0/TdUhzYgPQrOaDMgheqNRQQPffCBIUj8L BTZVxYFhS7WTIn9s7TebCIMhEnymO2RJSPTr6c1T8c98vXWX4i1aCdhDDjwDuSTZ W7GIelYBpWlTDjMR3IZYZ1VOJ7Nxx6ZVzXPrWCeiYWGtwSPchNvON9L4I1sadJ1z yZoXDReGSVHTB0/s+o/dNWpIa1UY7Drtvv5ccKUekIlN/makkME= =Ih+V -----END PGP SIGNATURE-----home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?ivnap4qielgtl4opglere7xu4fb44wxomp2nziezhvmhtl73ab>