History log of /linux-6.15/drivers/accessibility/speakup/selection.c (Results 1 – 2 of 2)
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Revision tags: v6.15, v6.15-rc7, v6.15-rc6, v6.15-rc5, v6.15-rc4, v6.15-rc3, v6.15-rc2, v6.15-rc1, v6.14, v6.14-rc7, v6.14-rc6, v6.14-rc5, v6.14-rc4, v6.14-rc3, v6.14-rc2, v6.14-rc1, v6.13, v6.13-rc7, v6.13-rc6, v6.13-rc5, v6.13-rc4, v6.13-rc3, v6.13-rc2, v6.13-rc1, v6.12, v6.12-rc7, v6.12-rc6, v6.12-rc5, v6.12-rc4, v6.12-rc3, v6.12-rc2, v6.12-rc1, v6.11, v6.11-rc7, v6.11-rc6, v6.11-rc5, v6.11-rc4, v6.11-rc3, v6.11-rc2, v6.11-rc1, v6.10, v6.10-rc7, v6.10-rc6, v6.10-rc5, v6.10-rc4, v6.10-rc3, v6.10-rc2, v6.10-rc1, v6.9, v6.9-rc7, v6.9-rc6, v6.9-rc5, v6.9-rc4, v6.9-rc3, v6.9-rc2, v6.9-rc1, v6.8, v6.8-rc7, v6.8-rc6, v6.8-rc5, v6.8-rc4, v6.8-rc3, v6.8-rc2, v6.8-rc1, v6.7, v6.7-rc8, v6.7-rc7, v6.7-rc6, v6.7-rc5, v6.7-rc4, v6.7-rc3, v6.7-rc2, v6.7-rc1, v6.6, v6.6-rc7, v6.6-rc6, v6.6-rc5, v6.6-rc4, v6.6-rc3, v6.6-rc2, v6.6-rc1, v6.5, v6.5-rc7, v6.5-rc6, v6.5-rc5, v6.5-rc4, v6.5-rc3, v6.5-rc2, v6.5-rc1, v6.4, v6.4-rc7, v6.4-rc6, v6.4-rc5, v6.4-rc4, v6.4-rc3, v6.4-rc2, v6.4-rc1, v6.3, v6.3-rc7, v6.3-rc6, v6.3-rc5, v6.3-rc4, v6.3-rc3, v6.3-rc2, v6.3-rc1, v6.2, v6.2-rc8, v6.2-rc7, v6.2-rc6, v6.2-rc5, v6.2-rc4, v6.2-rc3, v6.2-rc2, v6.2-rc1, v6.1, v6.1-rc8, v6.1-rc7, v6.1-rc6, v6.1-rc5, v6.1-rc4, v6.1-rc3, v6.1-rc2, v6.1-rc1, v6.0, v6.0-rc7, v6.0-rc6, v6.0-rc5, v6.0-rc4, v6.0-rc3, v6.0-rc2, v6.0-rc1, v5.19, v5.19-rc8, v5.19-rc7, v5.19-rc6, v5.19-rc5, v5.19-rc4, v5.19-rc3, v5.19-rc2, v5.19-rc1, v5.18, v5.18-rc7, v5.18-rc6, v5.18-rc5, v5.18-rc4, v5.18-rc3, v5.18-rc2, v5.18-rc1, v5.17, v5.17-rc8, v5.17-rc7, v5.17-rc6, v5.17-rc5, v5.17-rc4, v5.17-rc3, v5.17-rc2, v5.17-rc1, v5.16, v5.16-rc8, v5.16-rc7, v5.16-rc6, v5.16-rc5, v5.16-rc4, v5.16-rc3, v5.16-rc2, v5.16-rc1, v5.15, v5.15-rc7, v5.15-rc6, v5.15-rc5, v5.15-rc4, v5.15-rc3, v5.15-rc2, v5.15-rc1, v5.14, v5.14-rc7, v5.14-rc6, v5.14-rc5, v5.14-rc4, v5.14-rc3, v5.14-rc2, v5.14-rc1, v5.13, v5.13-rc7, v5.13-rc6, v5.13-rc5, v5.13-rc4, v5.13-rc3, v5.13-rc2, v5.13-rc1, v5.12, v5.12-rc8, v5.12-rc7, v5.12-rc6, v5.12-rc5, v5.12-rc4, v5.12-rc3, v5.12-rc2, v5.12-rc1, v5.12-rc1-dontuse, v5.11, v5.11-rc7, v5.11-rc6, v5.11-rc5, v5.11-rc4, v5.11-rc3, v5.11-rc2, v5.11-rc1, v5.10, v5.10-rc7, v5.10-rc6, v5.10-rc5, v5.10-rc4, v5.10-rc3
# 640969a6 07-Nov-2020 Samuel Thibault <[email protected]>

speakup: Fix clearing selection in safe context

speakup_cut() calls speakup_clear_selection() which calls console_lock.
Problem is: speakup_cut() is called from a keyboard interrupt
context. This wo

speakup: Fix clearing selection in safe context

speakup_cut() calls speakup_clear_selection() which calls console_lock.
Problem is: speakup_cut() is called from a keyboard interrupt
context. This would hang if speakup_cut is pressed while the console
lock is unfortunately already held.

We can however as well just defer calling clear_selection() until the
already-deferred set_selection_kernel() call.

This was spotted by the lock hardener:

Possible unsafe locking scenario:\x0a
CPU0
----
lock(console_lock);
<Interrupt>
lock(console_lock);
\x0a *** DEADLOCK ***\x0a
[...]
Call Trace:
<IRQ>
dump_stack+0xc2/0x11a
print_usage_bug.cold+0x3e0/0x4b1
mark_lock+0xd95/0x1390
? print_irq_inversion_bug+0xa0/0xa0
__lock_acquire+0x21eb/0x5730
? __kasan_check_read+0x11/0x20
? check_chain_key+0x215/0x5e0
? register_lock_class+0x1580/0x1580
? lock_downgrade+0x7a0/0x7a0
? __rwlock_init+0x140/0x140
lock_acquire+0x13f/0x370
? speakup_clear_selection+0xe/0x20 [speakup]
console_lock+0x33/0x50
? speakup_clear_selection+0xe/0x20 [speakup]
speakup_clear_selection+0xe/0x20 [speakup]
speakup_cut+0x19e/0x4b0 [speakup]
keyboard_notifier_call+0x1f04/0x4a40 [speakup]
? read_all_doc+0x240/0x240 [speakup]
notifier_call_chain+0xbf/0x130
__atomic_notifier_call_chain+0x80/0x130
atomic_notifier_call_chain+0x16/0x20
kbd_event+0x7d7/0x3b20
? k_pad+0x850/0x850
? sysrq_filter+0x450/0xd40
input_to_handler+0x362/0x4b0
? rcu_read_lock_sched_held+0xe0/0xe0
input_pass_values+0x408/0x5a0
? __rwlock_init+0x140/0x140
? lock_acquire+0x13f/0x370
input_handle_event+0x70e/0x1380
input_event+0x67/0x90
atkbd_interrupt+0xe62/0x1d4e [atkbd]
? __kasan_check_write+0x14/0x20
? atkbd_event_work+0x130/0x130 [atkbd]
? _raw_spin_lock_irqsave+0x26/0x70
serio_interrupt+0x93/0x120 [serio]
i8042_interrupt+0x232/0x510 [i8042]
? rcu_read_lock_bh_held+0xd0/0xd0
? handle_irq_event+0xa5/0x13a
? i8042_remove+0x1f0/0x1f0 [i8042]
__handle_irq_event_percpu+0xe6/0x6c0
handle_irq_event_percpu+0x71/0x150
? __handle_irq_event_percpu+0x6c0/0x6c0
? __kasan_check_read+0x11/0x20
? do_raw_spin_unlock+0x5c/0x240
handle_irq_event+0xad/0x13a
handle_edge_irq+0x233/0xa90
do_IRQ+0x10b/0x310
common_interrupt+0xf/0xf
</IRQ>

Cc: [email protected]
Reported-by: Jookia <[email protected]>
Signed-off-by: Samuel Thibault <[email protected]>
Link: https://lore.kernel.org/r/20201107233310.7iisvaozpiqj3yvy@function
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...


Revision tags: v5.10-rc2, v5.10-rc1, v5.9, v5.9-rc8, v5.9-rc7, v5.9-rc6, v5.9-rc5, v5.9-rc4, v5.9-rc3, v5.9-rc2, v5.9-rc1, v5.8
# 2067fd92 29-Jul-2020 Samuel Thibault <[email protected]>

staging/speakup: Move out of staging

The nasty TODO items are done.

Signed-off-by: Samuel Thibault <[email protected]>
Link: https://lore.kernel.org/r/20200729003531.907370-1-samuel.thib

staging/speakup: Move out of staging

The nasty TODO items are done.

Signed-off-by: Samuel Thibault <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...