Fix readme#2
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Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
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This is a tentative to fix the following crash: #0 0x00007f0a572da874 in calc_line_len (line=0x231) at ../libtsm/src/tsm/tsm-selection.c:188 kmscon#1 copy_line (line=0x231, buf=buf@entry=0x5614ec13aa7b "", start=0, len=256) at ../libtsm/src/tsm/tsm-selection.c:207 kmscon#2 0x00007f0a572dad65 in copy_lines (con=0x5614eb42c730, start=<optimized out>, end=<optimized out>, buf=0x5614ec139160 "iled on output DP-2\n00:13:24.870 [wlr] [backend/drm/atomic.c:83] connector DP-2: Atomic commit failed: Device or resource busy\n00:13:24.870 [sway/desktop/output.c:307] Page-flip failed on output DP-2\n"..., pos=6427) at ../libtsm/src/tsm/tsm-selection.c:459 kmscon#3 tsm_screen_selection_copy (con=0x5614eb42c730, out=out@entry=0x5614eb3f2618) at ../libtsm/src/tsm/tsm-selection.c:520 kmscon#4 0x00005614bb685484 in copy_selection (term=<optimized out>) at ../kmscon/src/kmscon_terminal.c:608 kmscon#5 handle_pointer_button (term=0x5614eb3f24f0, ev=0x7ffc8c54e730) at ../kmscon/src/kmscon_terminal.c:666 kmscon#6 pointer_event (input=<optimized out>, ev=0x7ffc8c54e730, data=0x5614eb3f24f0) at ../kmscon/src/kmscon_terminal.c:711 kmscon#7 0x00005614bb688ce6 in shl_hook_call (hook=0x5614eb3f0290, parent=0x5614eb3f0220, arg=0x7ffc8c54e730) at ../kmscon/src/shl_hook.h:216 kmscon#8 shl_hook_call (hook=0x5614eb3f0290, parent=0x5614eb3f0220, arg=0x7ffc8c54e730) at ../kmscon/src/shl_hook.h:200 kmscon#9 pointer_dev_send_button (button=button@entry=0 '\000', pressed=<optimized out>, dbl_click=<optimized out>, dev=0x5614eb7d9270) at ../kmscon/src/uterm_input_pointer.c:60 kmscon#10 0x00005614bb68fa67 in pointer_dev_button (dev=<optimized out>, code=272, value=0) at ../kmscon/src/uterm_input_pointer.c:188 kmscon#11 notify_event (dev=<optimized out>, type=<optimized out>, code=272, value=0) at ../kmscon/src/uterm_input.c:61 kmscon#12 input_data_dev (data=<optimized out>, mask=<optimized out>, fd=<optimized out>) at ../kmscon/src/uterm_input.c:104 kmscon#13 0x00005614bb68be80 in ev_eloop_dispatch (loop=loop@entry=0x5614eb3ed830, timeout=timeout@entry=-1) at ../kmscon/src/eloop.c:830 kmscon#14 0x00005614bb68c53b in ev_eloop_run (loop=0x5614eb3ed830, timeout=-1) at ../kmscon/src/eloop.c:884 kmscon#15 0x00005614bb67b8d6 in main (argc=<optimized out>, argv=<optimized out>) at ../kmscon/src/kmscon_main.c:616 Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
kdj0c
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Mar 31, 2026
This is a tentative to fix the following crash: #0 0x00007f0a572da874 in calc_line_len (line=0x231) at ../libtsm/src/tsm/tsm-selection.c:188 kmscon#1 copy_line (line=0x231, buf=buf@entry=0x5614ec13aa7b "", start=0, len=256) at ../libtsm/src/tsm/tsm-selection.c:207 kmscon#2 0x00007f0a572dad65 in copy_lines (con=0x5614eb42c730, start=<optimized out>, end=<optimized out>, buf=0x5614ec139160 "iled on output DP-2\n00:13:24.870 [wlr] [backend/drm/atomic.c:83] connector DP-2: Atomic commit failed: Device or resource busy\n00:13:24.870 [sway/desktop/output.c:307] Page-flip failed on output DP-2\n"..., pos=6427) at ../libtsm/src/tsm/tsm-selection.c:459 kmscon#3 tsm_screen_selection_copy (con=0x5614eb42c730, out=out@entry=0x5614eb3f2618) at ../libtsm/src/tsm/tsm-selection.c:520 kmscon#4 0x00005614bb685484 in copy_selection (term=<optimized out>) at ../kmscon/src/kmscon_terminal.c:608 kmscon#5 handle_pointer_button (term=0x5614eb3f24f0, ev=0x7ffc8c54e730) at ../kmscon/src/kmscon_terminal.c:666 kmscon#6 pointer_event (input=<optimized out>, ev=0x7ffc8c54e730, data=0x5614eb3f24f0) at ../kmscon/src/kmscon_terminal.c:711 kmscon#7 0x00005614bb688ce6 in shl_hook_call (hook=0x5614eb3f0290, parent=0x5614eb3f0220, arg=0x7ffc8c54e730) at ../kmscon/src/shl_hook.h:216 kmscon#8 shl_hook_call (hook=0x5614eb3f0290, parent=0x5614eb3f0220, arg=0x7ffc8c54e730) at ../kmscon/src/shl_hook.h:200 kmscon#9 pointer_dev_send_button (button=button@entry=0 '\000', pressed=<optimized out>, dbl_click=<optimized out>, dev=0x5614eb7d9270) at ../kmscon/src/uterm_input_pointer.c:60 kmscon#10 0x00005614bb68fa67 in pointer_dev_button (dev=<optimized out>, code=272, value=0) at ../kmscon/src/uterm_input_pointer.c:188 kmscon#11 notify_event (dev=<optimized out>, type=<optimized out>, code=272, value=0) at ../kmscon/src/uterm_input.c:61 kmscon#12 input_data_dev (data=<optimized out>, mask=<optimized out>, fd=<optimized out>) at ../kmscon/src/uterm_input.c:104 kmscon#13 0x00005614bb68be80 in ev_eloop_dispatch (loop=loop@entry=0x5614eb3ed830, timeout=timeout@entry=-1) at ../kmscon/src/eloop.c:830 kmscon#14 0x00005614bb68c53b in ev_eloop_run (loop=0x5614eb3ed830, timeout=-1) at ../kmscon/src/eloop.c:884 kmscon#15 0x00005614bb67b8d6 in main (argc=<optimized out>, argv=<optimized out>) at ../kmscon/src/kmscon_main.c:616 Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
kdj0c
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Apr 21, 2026
sb.pos, sb.pos_num and sb.count must stay coherent.
Fix the few corner case where sb.pos_num can be greater than sb.count
Which can cause a heap overvlow in set_selection like this:
==1236==ERROR: AddressSanitizer: heap-use-after-free on address 0x7cad23ff0058 at pc 0x7f4d26389bb0 bp 0x7ffee6280cc0 sp 0x7ffee6280cb0
READ of size 8 at 0x7cad23ff0058 thread T0
#0 0x7f4d26389baf in selection_set ../libtsm/src/tsm/tsm-selection.c:78
#1 0x7f4d263a1754 in tsm_screen_selection_start ../libtsm/src/tsm/tsm-selection.c:242
#2 0x5559ccbbdfb2 in start_selection
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
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