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spidark
Tux's lil' helper
Joined: 01 Sep 2011
Posts: 147
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 Posted: Wed Aug 22, 2018 5:22 pm Post subject: A question about Kdenlive behavior [SOLVED] |
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Hi Guys,
Its been a while for me, but back on Gentoo.
I installed Kdenlive, and hit the menu icon, and nothing happened.
So next move was to installed strace, to try to figure out what was going on.
I'm not a developer , but I noticed the Permission Denied at the end of strace.
| Code: | mmap(NULL, 8392704, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fa4befff000
mprotect(0x7fa4bf000000, 8388608, PROT_READ|PROT_WRITE) = 0
clone(child_stack=0x7fa4bf7fef30, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7fa4bf7ff9d0, tls=0x7fa4bf7ff700, child_tidptr=0x7fa4bf7ff9d0) = 3686
futex(0x5625696a3830, FUTEX_WAKE_PRIVATE, 1) = 1
getcwd("/home/bigmike", 4096) = 14
getcwd("/home/bigmike", 4096) = 14
write(14, "\1\0\0\0\0\0\0\0", 8) = 8
futex(0x5625696e8b84, FUTEX_WAIT_PRIVATE, 0, NULLmprotect failed in ExecutableAllocator::makeExecutable: Permission denied
*** stack smashing detected ***: <unknown> terminated
) = ?
+++ killed by SIGABRT +++
Aborted
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So it hit me, it could have something to do with the way i mount my home directory.
| Code: | | /home ext4 nodev,nosuid,noexec,relatime,discard 0 2 |
So i changed it to
| Code: | | /home ext4 defaults,relatime,discard 0 2 |
Kdenlive starts op after a reboot , which is good.
My question is, is this normal behavior ?
Or do i need to Sandbox the Cr@p out of Kdenlive ?
Thanks in advanced.
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Laptop HP Pavilion G6 2310-SD Intel(R) Core(TM) i7-3632QM CPU @ 2.20GHz
Last edited by spidark on Thu Aug 23, 2018 3:45 pm; edited 1 time in total |
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bunder
Bodhisattva
Joined: 10 Apr 2004
Posts: 5934
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| Posted: Wed Aug 22, 2018 5:40 pm Post subject: |
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kdenlive does a fair bit of work via scripts, so noexec might be a problem.
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spidark
Tux's lil' helper
Joined: 01 Sep 2011
Posts: 147
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| Posted: Wed Aug 22, 2018 6:23 pm Post subject: |
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| bunder wrote: | | kdenlive does a fair bit of work via scripts, so noexec might be a problem. |
Hi Bunder,
yes it seems like that indeed.
Maybe further investigation to see if it worth sandboxing kdenlive.
Thanks for your answer Bunder.
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leonid
n00b
Joined: 23 May 2003
Posts: 15
Location: Moscow Russia
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| Posted: Sun Oct 21, 2018 10:24 am Post subject: |
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Hello!
I've the same problem. But my fs is btrfs mounted as
| Code: | | UUID="ddf39d97-d07c-4d5a-b2ec-6f0a806e0e48" /home btrfs subvol=@home,defaults,noatime,nodiratime 0 1 |
So it is no flags like noexec. No ideas what the reason of crash?
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Leonid Kolesnik |
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leonid
n00b
Joined: 23 May 2003
Posts: 15
Location: Moscow Russia
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| Posted: Sun Oct 21, 2018 10:39 am Post subject: |
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The reason was I had /tmp mounted with no exec option.
Solved.
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Leonid Kolesnik |
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Hu
Moderator
Joined: 06 Mar 2007
Posts: 21633
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| Posted: Sun Oct 21, 2018 6:09 pm Post subject: |
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| leonid wrote: | | The reason was I had /tmp mounted with no exec option. |
As all systems should. In my opinion, it is wrong for programs to fail when /tmp is noexec. |
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leonid
n00b
Joined: 23 May 2003
Posts: 15
Location: Moscow Russia
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| Posted: Sun Oct 21, 2018 7:01 pm Post subject: |
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I think so. But turn off noexec let's chance to run.
I suppose kdenlive produce a lot of scripts in /tmp for processing. As for me it could do it somewhere in ~/
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Leonid Kolesnik |
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spidark
Tux's lil' helper
Joined: 01 Sep 2011
Posts: 147
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| Posted: Sun Oct 21, 2018 8:53 pm Post subject: |
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| leonid wrote: | I think so. But turn off noexec let's chance to run.
I suppose kdenlive produce a lot of scripts in /tmp for processing. As for me it could do it somewhere in ~/ |
Yes it does, tested this behaviour on another distro, same issue.
If /tmp is mounted with noexec, you get a stack smashing detected error.
| Code: | | NULLmprotect failed in ExecutableAllocator:makeExecutable"permission denied |
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