================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: null-ptr-deref in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] BUG: KASAN: null-ptr-deref in buffer_busy fs/buffer.c:2886 [inline] BUG: KASAN: null-ptr-deref in drop_buffers+0x6f/0x710 fs/buffer.c:2898 Read of size 4 at addr 0000000000000060 by task kswapd0/86 CPU: 1 UID: 0 PID: 86 Comm: kswapd0 Not tainted 6.10.0-rc7-next-20240712-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_report+0xe8/0x550 mm/kasan/report.c:491 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:68 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline] buffer_busy fs/buffer.c:2886 [inline] drop_buffers+0x6f/0x710 fs/buffer.c:2898 try_to_free_buffers+0x295/0x5f0 fs/buffer.c:2952 shrink_folio_list+0x26c2/0x8c90 mm/vmscan.c:1413 evict_folios+0x5323/0x78c0 mm/vmscan.c:4559 try_to_shrink_lruvec+0x9ab/0xbb0 mm/vmscan.c:4754 shrink_one+0x3cc/0x880 mm/vmscan.c:4793 shrink_many mm/vmscan.c:4856 [inline] lru_gen_shrink_node mm/vmscan.c:4960 [inline] shrink_node+0x3979/0x4160 mm/vmscan.c:5940 kswapd_shrink_node mm/vmscan.c:6768 [inline] balance_pgdat mm/vmscan.c:6960 [inline] kswapd+0x17ce/0x3640 mm/vmscan.c:7229 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ==================================================================