Date: Fri, 29 Sep 2017 14:22:43 -0400 From: Anton Yuzhaninov <citrin@citrin.ru> To: freebsd-fs@freebsd.org Subject: Panic: vm_fault: fault on nofault entry Message-ID: <35aef1ac-a1dd-4526-46f8-599b4fb3b0f4@citrin.ru>
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Hi All, I have panics when I try to use nginx on my notebook. When sendfile is enabled it is easy to trigger panic, after disabling sendfile I've got no panics so far and I think that panic is triggered by using sendfile. Root filesystem - UFS on GELI whith 8k sectorsize. GELI with sectorsize large than page size is non-standard configuration, and I've got problem because of this in the past: https://lists.freebsd.org/pipermail/freebsd-fs/2016-October/023957.html but it was fixed in: https://svnweb.freebsd.org/changeset/base/307626 Probably I've not used sendfile on this filesystem since then. Panic string is: "vm_fault: fault on nofault entry, addr: fffffe0220ab6000" 0xfffffe0220ab6000 is the address for bzero in vnode_pager_generic_getpages_done (kgdb) f 17 #17 0xffffffff807ee290 in vnode_pager_generic_getpages_done (bp=0xfffffe01ea816490) at /spool/src/sys/vm/vnode_pager.c:1049 1049 bzero(bp->b_data + bp->b_bcount, (kgdb) l 1044 if (!buf_mapped(bp)) { 1045 bp->b_data = bp->b_kvabase; 1046 pmap_qenter((vm_offset_t)bp->b_data, bp->b_pages, 1047 bp->b_npages); 1048 } 1049 bzero(bp->b_data + bp->b_bcount, 1050 PAGE_SIZE * bp->b_npages - bp->b_bcount); 1051 } 1052 if (buf_mapped(bp)) { 1053 pmap_qremove((vm_offset_t)bp->b_data, bp->b_npages); (kgdb) p bp->b_data + bp->b_bcount $4 = 0xfffffe0220ab6000 <Address 0xfffffe0220ab6000 out of bounds> bp->b_data is a pointer to data from a file served using sendfile. and bp->b_bcount is 8192 (GELI sector size is also 8192) Full backtrace: http://termbin.com/dqpl OS version: 11.1-STABLE #0 r322995 -- Best Regards, Anton Yuzhaninov
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