lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

kgdb: Prevent infinite recursive entries to the debugger

Browse Source 
[ Upstream commit 3ca676e4ca60d1834bb77535dafe24169cadacef ]

If we detect that we recursively entered the debugger we should hack
our I/O ops to NULL so that the panic() in the next line won't
actually cause another recursion into the debugger.  The first line of
kgdb_panic() will check this and return.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20200507130644.v4.6.I89de39f68736c9de610e6f241e68d8dbc44bc266@changeid
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Douglas Anderson 2020-05-07 13:08:44 -07:00 committed by Greg Kroah-Hartman
parent 1343e0a859
commit 308c2095da
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
kernel/debug/debug_core.c
View File

@ -501,6 +501,7 @@ static int kgdb_reenter_check(struct kgdb_state *ks)
if (exception_level > 1) {
dump_stack();
kgdb_io_module_registered = false;
panic("Recursive entry to debugger");
}