Date: Tue, 18 Sep 2018 20:52:52 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 230655] vlan(4) holds non-sleepable locks around driver ioctls Message-ID: <bug-230655-7501-cDKSYMfJeR@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-230655-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-230655-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D230655 Eric Joyner <erj@freebsd.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |erj@freebsd.org --- Comment #1 from Eric Joyner <erj@freebsd.org> --- We also see this when using iflib drivers: lock order reversal: (sleepable after non-sleepable) 1st 0xfffff807b4884d08 vlan (vlan) @ /usr/src/sys/net/if_vlan.c:1931 2nd 0xfffff80549c87560 iflib ctx lock (iflib ctx lock) @ /usr/src/sys/net/iflib.c:4218 stack backtrace: #0 0xffffffff80bc1c83 at witness_debugger+0x73 #1 0xffffffff80bc19d3 at witness_checkorder+0xab3 #2 0xffffffff80b62e68 at _sx_xlock+0x68 #3 0xffffffff80c7a2bc at iflib_if_ioctl+0x8c #4 0xffffffff80c5beca at if_addmulti+0x24a #5 0xffffffff80c6c9c6 at vlan_setmulti+0x196 #6 0xffffffff80c6bb89 at vlan_ioctl+0xa9 #7 0xffffffff80c5beca at if_addmulti+0x24a #8 0xffffffff80ce0075 at in_joingroup_locked+0x235 #9 0xffffffff80cdfe12 at in_joingroup+0x42 #10 0xffffffff80cdb358 at in_control+0xb08 #11 0xffffffff80c5af73 at ifioctl+0x1853 #12 0xffffffff80bc6bba at kern_ioctl+0x2ba #13 0xffffffff80bc688e at sys_ioctl+0x15e #14 0xffffffff8102ce0c at amd64_syscall+0x28c #15 0xffffffff810095fd at fast_syscall_common+0x101 --=20 You are receiving this mail because: You are the assignee for the bug.=
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