[ARM] Fix stacktrace FP range checking
Fix an oops in the stacktrace code, caused by improper range checking. We subtract 12 off 'fp' before testing to see if it's below the low bound. However, if 'fp' were zero before, it becomes a very large positive number, causing this test to succeed where it should fail. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
parent
b91d8a1205
commit
5b10c8e436
|
@ -13,7 +13,7 @@ int walk_stackframe(unsigned long fp, unsigned long low, unsigned long high,
|
|||
/*
|
||||
* Check current frame pointer is within bounds
|
||||
*/
|
||||
if ((fp - 12) < low || fp + 4 >= high)
|
||||
if (fp < (low + 12) || fp + 4 >= high)
|
||||
break;
|
||||
|
||||
frame = (struct stackframe *)(fp - 12);
|
||||
|
|
Loading…
Reference in a new issue