mirror of https://github.com/torvalds/linux.git
6ee9b3d847
find_vm_area() couldn't be called in atomic_context. If find_vm_area() is
called to reports vm area information, kasan can trigger deadlock like:
CPU0 CPU1
vmalloc();
alloc_vmap_area();
spin_lock(&vn->busy.lock)
spin_lock_bh(&some_lock);
<interrupt occurs>
<in softirq>
spin_lock(&some_lock);
<access invalid address>
kasan_report();
print_report();
print_address_description();
kasan_find_vm_area();
find_vm_area();
spin_lock(&vn->busy.lock) // deadlock!
To prevent possible deadlock while kasan reports, remove kasan_find_vm_area().
Link: https://lkml.kernel.org/r/20250703181018.580833-1-yeoreum.yun@arm.com
Fixes:
|
||
|---|---|---|
| .. | ||
| Makefile | ||
| common.c | ||
| generic.c | ||
| hw_tags.c | ||
| init.c | ||
| kasan.h | ||
| kasan_test_c.c | ||
| kasan_test_rust.rs | ||
| quarantine.c | ||
| report.c | ||
| report_generic.c | ||
| report_hw_tags.c | ||
| report_sw_tags.c | ||
| report_tags.c | ||
| shadow.c | ||
| sw_tags.c | ||
| tags.c | ||