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Kernel: Allow to remove files from sticky directory if user owns it

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It's what the Linux chmod(1) manpage says (in the 'Restricted Deletion
Flag or Sticky Bit' section), and it just makes sense to me. :^)
This commit is contained in:
Karol Kosek
2022-09-01 14:16:32 +02:00
committed by Linus Groh
parent 798154fbbc
commit 8cfd445c23
Notes: sideshowbarker 2024-07-17 01:46:00 +09:00 
Author: https://github.com/krkk
Commit: https://github.com/SerenityOS/serenity/commit/8cfd445c23
Pull-request: https://github.com/SerenityOS/serenity/pull/17006
Reviewed-by: https://github.com/kleinesfilmroellchen ✅
1 changed files with 2 additions and 2 deletions
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4
Kernel/FileSystem/VirtualFileSystem.cpp
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@@ -645,7 +645,7 @@ ErrorOr<void> VirtualFileSystem::rename(Credentials const& credentials, Custody&
return EACCES;
if (old_parent_inode.metadata().is_sticky()) {
if (!credentials.is_superuser() && old_inode.metadata().uid != credentials.euid())
if (!credentials.is_superuser() && old_parent_inode.metadata().uid != credentials.euid() && old_inode.metadata().uid != credentials.euid())
return EACCES;
}
@@ -807,7 +807,7 @@ ErrorOr<void> VirtualFileSystem::unlink(Credentials const& credentials, StringVi
return EACCES;
if (parent_inode.metadata().is_sticky()) {
if (!credentials.is_superuser() && inode.metadata().uid != credentials.euid())
if (!credentials.is_superuser() && parent_inode.metadata().uid != credentials.euid() && inode.metadata().uid != credentials.euid())
return EACCES;
}