Messages in this thread | | | Date | Mon, 10 Nov 1997 15:56:56 +0000 | From | Richard Jones <> | Subject | mmap over NFS fails on binaries and shared libs in 2.1.61? |
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I don't know if anyone's seen this. Apologies in advance if it is a well-known bug.
Since installing 2.1.61 + Dave's CVS patches (971103), some binaries and shared libraries fail to work, but only when they are on NFS-mounted drives.
For example, an strace running RTIN from an NFS mounted drive:
whistler:~$strace rtin execve("/usr/local/i386-unknown-linux/bin/rtin", ["rtin"], [/* 34 vars */]) = 0 mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40007000 --- SIGSEGV (Segmentation fault) --- +++ killed by SIGSEGV +++
(Runs fine from /tmp)
Similarly, libmediatool.so.0.0.6 (from KDE Beta 1) fails in mmap() when it's loaded from an NFS drive, but not when I get it from /tmp. In this case, the error is slightly different:
[extract from strace ...]
open("/usr/local/i386-unknown-linux/lib/kde-beta-1/lib/libmediatool.so.0", O_RDO NLY) = 3 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3"..., 4096) = 4096 mmap(0, 16384, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x4000c000 mmap(0x4000c000, 9535, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0x400 0c000 mmap(0x4000f000, 1756, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x2000) = -1 EINVAL (Invalid argument) write(2, "ls: can\'t map \'/usr/local/i386"..., 83ls: can't map '/usr/local/i386 -unknown-linux/lib/kde-beta-1/lib/libmediatool.so.0' ) = 83
Has anyone seen this before? It only affects certain programs/ libraries. Lots of things still run OK from NFS.
I haven't tried 2.1.62 yet, but a quick glance seems to show that there are no patches in there that should affect mmap.
The client: Linux 2.1.61 + CVS 971103, -o nolock The server: Linux 2.0.30, NFS server 2.2beta29
Rich.
-- Richard Jones rjones@imcl.com Tel: +44 171 460 6141 Fax: .. 4461 ABLE INmEDIA Ltd. 262a Fulham Rd. London SW10 9EL. "you'll write in PGP: www.four11.com telegraphic, or you won't write at all" [Céline]
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