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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-16 21:47:18 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-16 21:47:18 +0200 |
commit | 49dc6fbce33011733601e4e81c551e066f1682fc (patch) | |
tree | d23df2a2d5f655597c1882c8c345f29ec4668e2c /lib | |
parent | Merge tag 'mips_5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/l... (diff) | |
parent | kdb: Fix pager search for multi-line strings (diff) | |
download | linux-49dc6fbce33011733601e4e81c551e066f1682fc.tar.xz linux-49dc6fbce33011733601e4e81c551e066f1682fc.zip |
Merge tag 'kgdb-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux
Pull kgdb updates from Daniel Thompson:
"A fairly modest set of changes for this cycle.
Of particular note are an earlycon fix from Doug Anderson and my own
changes to get kgdb/kdb to honour the kprobe blocklist. The later
creates a safety rail that strongly encourages developers not to place
breakpoints in, for example, arch specific trap handling code.
Also included are a couple of small fixes and tweaks: an API update,
eliminate a coverity dead code warning, improved handling of search
during multi-line printk and a couple of typo corrections"
* tag 'kgdb-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux:
kdb: Fix pager search for multi-line strings
kernel: debug: Centralize dbg_[de]activate_sw_breakpoints
kgdb: Add NOKPROBE labels on the trap handler functions
kgdb: Honour the kprobe blocklist when setting breakpoints
kernel/debug: Fix spelling mistake in debug_core.c
kdb: Use newer api for tasklist scanning
kgdb: Make "kgdbcon" work properly with "kgdb_earlycon"
kdb: remove unnecessary null check of dbg_io_ops
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Kconfig.kgdb | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/Kconfig.kgdb b/lib/Kconfig.kgdb index 256f2486f9bd..05dae05b6cc9 100644 --- a/lib/Kconfig.kgdb +++ b/lib/Kconfig.kgdb @@ -24,6 +24,21 @@ menuconfig KGDB if KGDB +config KGDB_HONOUR_BLOCKLIST + bool "KGDB: use kprobe blocklist to prohibit unsafe breakpoints" + depends on HAVE_KPROBES + depends on MODULES + select KPROBES + default y + help + If set to Y the debug core will use the kprobe blocklist to + identify symbols where it is unsafe to set breakpoints. + In particular this disallows instrumentation of functions + called during debug trap handling and thus makes it very + difficult to inadvertently provoke recursive trap handling. + + If unsure, say Y. + config KGDB_SERIAL_CONSOLE tristate "KGDB: use kgdb over the serial console" select CONSOLE_POLL |