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Michael Weiser 730efbc89c Prevent use-after-free on first bar subcommand error ... If any error is encountered during execution of the first subcommand of a freshly created bar configuration, parsing apparently is to be aborted and the current bar config is freed. The pointer to that memory is left dangling though, leading to a use-after-free on successive bar subcommands. This quite reliably ends in a crash like so: sway -c reproducer.config 00:00:00.083 [sway/config.c:865] Error on line 2 'foo bar': Unknown/invalid command 'foo' (s) free(): double free detected in tcache 2 00:00:00.608 [swaynag/swaynag.c:451] failed to register with the wayland display Aborted (core dumped) Minimal reproducer config: bar { foo bar position top } Other messages: malloc(): unaligned fastbin chunk detected double free or corruption (fasttop) The invalid command has to be the first for a newly created bar config. Removing the command or switching order so it's not the first one masks the problem. Prevent this from occuring by resetting the pointer to NULL after freeing the memory. Signed-off-by: Michael Weiser <michael.weiser@gmx.de>		4 years ago
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commands	Prevent use-after-free on first bar subcommand error	4 years ago
config	output: Reconfigure xcursor when applying output config	4 years ago
desktop	desktop/layer_shell: fix centering for opposing anchors	4 years ago
input	Implement input method keyboard grab	4 years ago
tree	container: don't set fullscreen on children	4 years ago
commands.c	Fix for_window criteria and mouse button bindings	4 years ago
config.c	config: allow whitespaces in config path	4 years ago
criteria.c	container: Move pending state to state struct	4 years ago
decoration.c	Fix double free when unmapping any view	6 years ago
ipc-json.c	container: Move pending state to state struct	4 years ago
ipc-server.c	Fix incorrect format specifiers	4 years ago
main.c	Log wlroots version on startup	4 years ago
meson.build	Automatically map built-in touchscreens/tablets to built-in panels	4 years ago
server.c	Remove WLR_HAS_XDG_FOREIGN checks	4 years ago
sway-bar.5.scd	Add support for workspace_min_width bar option.	4 years ago
sway-input.5.scd	man: document `input XXX map_to_output *`	4 years ago
sway-ipc.7.scd	document parse_error	4 years ago
sway-output.5.scd	Add toggle logic inside DPMS handler	4 years ago
sway.1.scd	man: update maintainer	4 years ago
sway.5.scd	Change workspace_layout to match i3 behavior	4 years ago
swaynag.c	Rename symbol set_cloexec to sway_set_cloexec, remove duplicates.	5 years ago
xdg_decoration.c	Fix xdg-decoration unconfigured if set before first commit	6 years ago