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Kernel: Mark sys$fchmod() as not needing the big lock

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This syscall doesn't access any data that was implicitly protected by
the big lock.
This commit is contained in:
Andreas Kling 2022-03-08 16:32:29 +01:00
parent d074aae422
commit aa381c4a67
2 changed files with 2 additions and 2 deletions
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2
Kernel/API/Syscall.h
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@ -68,7 +68,7 @@ enum class NeedsBigProcessLock {
S(exit, NeedsBigProcessLock::Yes) \ S(exit, NeedsBigProcessLock::Yes) \
S(exit_thread, NeedsBigProcessLock::Yes) \ S(exit_thread, NeedsBigProcessLock::Yes) \
S(fchdir, NeedsBigProcessLock::No) \ S(fchdir, NeedsBigProcessLock::No) \
S(fchmod, NeedsBigProcessLock::Yes) \ S(fchmod, NeedsBigProcessLock::No) \
S(fchown, NeedsBigProcessLock::Yes) \ S(fchown, NeedsBigProcessLock::Yes) \
S(fcntl, NeedsBigProcessLock::Yes) \ S(fcntl, NeedsBigProcessLock::Yes) \
S(fork, NeedsBigProcessLock::Yes) \ S(fork, NeedsBigProcessLock::Yes) \

2
Kernel/Syscalls/chmod.cpp
View file

@ -34,7 +34,7 @@ ErrorOr<FlatPtr> Process::sys$chmod(Userspace<Syscall::SC_chmod_params const*> u
ErrorOr<FlatPtr> Process::sys$fchmod(int fd, mode_t mode) ErrorOr<FlatPtr> Process::sys$fchmod(int fd, mode_t mode)
{ {
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this); VERIFY_NO_PROCESS_BIG_LOCK(this);
TRY(require_promise(Pledge::fattr)); TRY(require_promise(Pledge::fattr));
auto description = TRY(open_file_description(fd)); auto description = TRY(open_file_description(fd));
TRY(description->chmod(mode)); TRY(description->chmod(mode));