==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:72 [inline]
BUG: KASAN: null-ptr-deref in atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
BUG: KASAN: null-ptr-deref in buffer_busy fs/buffer.c:2784 [inline]
BUG: KASAN: null-ptr-deref in drop_buffers+0x65/0x6a0 fs/buffer.c:2796
Read of size 4 at addr 0000000000000060 by task kswapd0/83

CPU: 0 PID: 83 Comm: kswapd0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
 kasan_report+0x10b/0x140 mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x235/0x290 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
 buffer_busy fs/buffer.c:2784 [inline]
 drop_buffers+0x65/0x6a0 fs/buffer.c:2796
 try_to_free_buffers+0x230/0x560 fs/buffer.c:2830
 shrink_folio_list+0x2127/0x7aa0 mm/vmscan.c:2003
 evict_folios+0xa80/0x22a0 mm/vmscan.c:5046
 lru_gen_shrink_lruvec mm/vmscan.c:5229 [inline]
 shrink_lruvec+0xc90/0x3d50 mm/vmscan.c:5924
 shrink_node_memcgs mm/vmscan.c:6145 [inline]
 shrink_node+0x680/0x28d0 mm/vmscan.c:6176
 kswapd_shrink_node mm/vmscan.c:6968 [inline]
 balance_pgdat mm/vmscan.c:7158 [inline]
 kswapd+0x1c3e/0x3360 mm/vmscan.c:7418
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
==================================================================
Kernel panic - not syncing: KASAN: panic_on_warn set ...
CPU: 0 PID: 83 Comm: kswapd0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
 panic+0x2e5/0x730 kernel/panic.c:339
 check_panic_on_warn+0x80/0xa0 kernel/panic.c:235
 end_report+0x66/0x110 mm/kasan/report.c:200
 kasan_report+0x118/0x140 mm/kasan/report.c:526
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x235/0x290 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
 buffer_busy fs/buffer.c:2784 [inline]
 drop_buffers+0x65/0x6a0 fs/buffer.c:2796
 try_to_free_buffers+0x230/0x560 fs/buffer.c:2830
 shrink_folio_list+0x2127/0x7aa0 mm/vmscan.c:2003
 evict_folios+0xa80/0x22a0 mm/vmscan.c:5046
 lru_gen_shrink_lruvec mm/vmscan.c:5229 [inline]
 shrink_lruvec+0xc90/0x3d50 mm/vmscan.c:5924
 shrink_node_memcgs mm/vmscan.c:6145 [inline]
 shrink_node+0x680/0x28d0 mm/vmscan.c:6176
 kswapd_shrink_node mm/vmscan.c:6968 [inline]
 balance_pgdat mm/vmscan.c:7158 [inline]
 kswapd+0x1c3e/0x3360 mm/vmscan.c:7418
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Kernel Offset: disabled