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Fix #4890

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`strings.to_cstring` previously would not check if the buffer could
handle the extra null byte and could lead to segmentation violations
when using the resulting string in an API expecting the terminator.
This commit is contained in:
Feoramund committed 2025-02-27 18:54:38 -05:00
1 parent 94152ca701
commit b2e3b34ce0
5 files changed
+39 -16
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core/os/os2/process_posix.odin
+4 -4
View File
@@ -71,7 +71,7 @@ _process_start :: proc(desc: Process_Desc) -> (process: Process, err: Error) {
strings.write_byte(&exe_builder, '/')
strings.write_string(&exe_builder, exe_name)
if exe_fd := posix.open(strings.to_cstring(&exe_builder), {.CLOEXEC, .EXEC}); exe_fd == -1 {
if exe_fd := posix.open(strings.to_cstring(&exe_builder) or_return, {.CLOEXEC, .EXEC}); exe_fd == -1 {
continue
} else {
posix.close(exe_fd)
@@ -91,7 +91,7 @@ _process_start :: proc(desc: Process_Desc) -> (process: Process, err: Error) {
// "hello/./world" is fine right?
if exe_fd := posix.open(strings.to_cstring(&exe_builder), {.CLOEXEC, .EXEC}); exe_fd == -1 {
if exe_fd := posix.open(strings.to_cstring(&exe_builder) or_return, {.CLOEXEC, .EXEC}); exe_fd == -1 {
err = .Not_Exist
return
} else {
@@ -102,7 +102,7 @@ _process_start :: proc(desc: Process_Desc) -> (process: Process, err: Error) {
strings.builder_reset(&exe_builder)
strings.write_string(&exe_builder, exe_name)
if exe_fd := posix.open(strings.to_cstring(&exe_builder), {.CLOEXEC, .EXEC}); exe_fd == -1 {
if exe_fd := posix.open(strings.to_cstring(&exe_builder) or_return, {.CLOEXEC, .EXEC}); exe_fd == -1 {
err = .Not_Exist
return
} else {
@@ -181,7 +181,7 @@ _process_start :: proc(desc: Process_Desc) -> (process: Process, err: Error) {
if posix.chdir(cwd) != .OK { abort(pipe[WRITE]) }
}
res := posix.execve(strings.to_cstring(&exe_builder), raw_data(cmd), env)
res := posix.execve(strings.to_cstring(&exe_builder) or_return, raw_data(cmd), env)
assert(res == -1)
abort(pipe[WRITE])