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Kernel: Use real UID/GID when checking for file access

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This aligns the rest of the system with POSIX, who says that access(2)
must check against the real UID and GID, not effective ones.
This commit is contained in:
sin-ack 2022-10-01 12:03:46 +00:00 • committed by Andrew Kaster
parent 3472c84d14
commit fa692e13f9
3 changed files with 20 additions and 12 deletions
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15
Kernel/FileSystem/InodeMetadata.cpp
View file

@ -9,19 +9,22 @@
namespace Kernel {
bool InodeMetadata::may_read(Credentials const& credentials) const
bool InodeMetadata::may_read(Credentials const& credentials, UseEffectiveIDs use_effective_ids) const
{
return may_read(credentials.euid(), credentials.egid(), credentials.extra_gids());
bool eids = use_effective_ids == UseEffectiveIDs::Yes;
return may_read(eids ? credentials.euid() : credentials.uid(), eids ? credentials.egid() : credentials.gid(), credentials.extra_gids());
}
bool InodeMetadata::may_write(Credentials const& credentials) const
bool InodeMetadata::may_write(Credentials const& credentials, UseEffectiveIDs use_effective_ids) const
{
return may_write(credentials.euid(), credentials.egid(), credentials.extra_gids());
bool eids = use_effective_ids == UseEffectiveIDs::Yes;
return may_write(eids ? credentials.euid() : credentials.uid(), eids ? credentials.egid() : credentials.gid(), credentials.extra_gids());
}
bool InodeMetadata::may_execute(Credentials const& credentials) const
bool InodeMetadata::may_execute(Credentials const& credentials, UseEffectiveIDs use_effective_ids) const
{
return may_execute(credentials.euid(), credentials.egid(), credentials.extra_gids());
bool eids = use_effective_ids == UseEffectiveIDs::Yes;
return may_execute(eids ? credentials.euid() : credentials.uid(), eids ? credentials.egid() : credentials.gid(), credentials.extra_gids());
}
}