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command: dupe mode name memory

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The hashmap doesn't take ownership of the memory pointer to by these
slices, so we need to dupe them to avoid use-after-free.
This commit is contained in:
Isaac Freund
2020-06-26 12:46:18 +02:00
parent 08d630567f
commit dfb03fd0cb
2 changed files with 8 additions and 2 deletions
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7
river/command/declare_mode.zig
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@ -18,6 +18,7 @@
const std = @import("std");
const c = @import("../c.zig");
const util = @import("../util.zig");
const Error = @import("../command.zig").Error;
const Mapping = @import("../Mapping.zig");
@ -45,7 +46,9 @@ pub fn declareMode(
return Error.CommandFailed;
}
try config.mode_to_id.putNoClobber(new_mode_name, config.modes.items.len);
errdefer _ = config.mode_to_id.remove(new_mode_name);
const owned_name = try std.mem.dupe(util.gpa, u8, new_mode_name);
errdefer util.gpa.free(owned_name);
try config.mode_to_id.putNoClobber(owned_name, config.modes.items.len);
errdefer _ = config.mode_to_id.remove(owned_name);
try config.modes.append(std.ArrayList(Mapping).init(allocator));
}