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Diffstat (limited to 'open_issues')
| -rw-r--r-- | open_issues/glibc.mdwn | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/open_issues/glibc.mdwn b/open_issues/glibc.mdwn index 23339bac..f2dc3159 100644 --- a/open_issues/glibc.mdwn +++ b/open_issues/glibc.mdwn @@ -1864,6 +1864,70 @@ Last reviewed up to the [[Git mirror's 0323d08657f111267efa47bd448fbf6cd76befe8 type for some flock structure field) <youpi> s/by/be/ + * `truncate`/`ftruncate` + + Hurd fixed with 2013-10-03 commit 6c3825f2b750bf9b913c6ea986739e648c470603, + glibc still to be done? + + IRC, freenode, #hurd, 2013-10-01: + + <pinotree> libdiskfs/node-drop.c: assert (np->dn_stat.st_size == 0); ← + this one? + <pinotree> iirc you constantly get that when building ustr + <braunr> is ustr a package ? + <pinotree> yes + <pinotree> iirc the ustr tests are mostly disk-intensive + + IRC, freenode, #hurd, 2013-10-02: + + <braunr> i've traced the problem up to truncate + <braunr> which gets a negative size + <braunr> shouldn't take long to find out where it comes from now + <pinotree> it seems our truncate doesn't handle negative values well though + <braunr> EINVAL The argument length is negative or larger than the + maximum file size. + <braunr> i still have to see whether it comes from the user (unlikely) or + if it's an internal inconsistency + <braunr> i suspect some code wrongly handles vm_map failures + <braunr> leading to that inconsistency + <braunr> pinotree: looks like glibc doesn't check for length >= 0 + <pinotree> yeah + <braunr> servers should do it nonetheless + <pinotree> should we fix glibc, libdiskfs/libnetfs/libtrivfs/etc, or both? + <braunr> it appears a client does the truncate + <braunr> i'd say both + <braunr> can you take the glibc part ? :) + <pinotree> i was going to do the hurd part... :p + <pinotree> ok, i'll pick libc + <braunr> well i'm doing it already + <braunr> i want to write a test case first + <braunr> to make sure that's the problem + <pinotree> already on the hurd part, you mean? + <braunr> yes + <pinotree> ok + <braunr> ok looks like it + <braunr> i can't reproduce the assertion but it does make ext2fs freeze + <braunr> pinotree: http://darnassus.sceen.net/~rbraun/test_ftruncate.c + <pinotree> merci + <braunr> pinotree: ustr builds + <pinotree> wow + <braunr> the client code (ustr) seems to perform a ftruncate with size + ((size_t)-1) whereas lengths are signed .. + <braunr> i'll check other libraries and send a patch soon + + IRC, freenode, #hurd, 2013-10-03: + + <braunr> youpi: i've committed a fix to hurd that checks for negative sizes + when truncating files + <braunr> this allows building the ustr package without making ext2fs choke + on an assertion + <braunr> pinotree is preparing a patch for glibc + <braunr> see truncate/ftruncate + <braunr> with an off_t size parameter, which can be negative + <braunr> EINVAL The argument length is negative or larger than the + maximum file size. + <braunr> hurd servers were not conforming to that before my change + * Verify baseline changes, if we need any follow-up changes: * a11ec63713ea3903c482dc907a108be404191a02 |