Sumit Garg ed5d02f0a7 kdb: Make memory allocations more robust ... commit 93f7a6d818deef69d0ba652d46bae6fbabbf365c upstream. Currently kdb uses in_interrupt() to determine whether its library code has been called from the kgdb trap handler or from a saner calling context such as driver init. This approach is broken because in_interrupt() alone isn't able to determine kgdb trap handler entry from normal task context. This can happen during normal use of basic features such as breakpoints and can also be trivially reproduced using: echo g > /proc/sysrq-trigger We can improve this by adding check for in_dbg_master() instead which explicitly determines if we are running in debugger context. Cc: stable@vger.kernel.org Signed-off-by: Sumit Garg <sumit.garg@linaro.org> Link: https://lore.kernel.org/r/1611313556-4004-1-git-send-email-sumit.garg@linaro.org Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-03-04 11:37:18 +01:00
..
kdb	kdb: Make memory allocations more robust	2021-03-04 11:37:18 +01:00
debug_core.c	kernel: debug: Centralize dbg_[de]activate_sw_breakpoints	2020-10-01 14:23:45 +01:00
debug_core.h	kdb: Fix stack crawling on 'running' CPUs that aren't the master	2019-10-10 16:28:48 +01:00
gdbstub.c	kernel: debug: Centralize dbg_[de]activate_sw_breakpoints	2020-10-01 14:23:45 +01:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00