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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:2902 [inline]
BUG: KASAN: null-ptr-deref in drop_buffers.constprop.0+0x99/0x510 fs/buffer.c:2914
Read of size 4 at addr 0000000000000060 by task syz-executor.1/22688

CPU: 0 PID: 22688 Comm: syz-executor.1 Not tainted 6.5.0-rc3-next-20230728-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 check_region_inline mm/kasan/generic.c:181 [inline]
 kasan_check_range+0xef/0x190 mm/kasan/generic.c:187
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 buffer_busy fs/buffer.c:2902 [inline]
 drop_buffers.constprop.0+0x99/0x510 fs/buffer.c:2914
 try_to_free_buffers+0x21b/0x2d0 fs/buffer.c:2944
 filemap_release_folio+0x20f/0x270 mm/filemap.c:4089
 shrink_folio_list+0x28bc/0x3dc0 mm/vmscan.c:2068
 evict_folios+0x6bc/0x18f0 mm/vmscan.c:5181
 try_to_shrink_lruvec+0x769/0xb00 mm/vmscan.c:5357
 lru_gen_shrink_lruvec mm/vmscan.c:5494 [inline]
 shrink_lruvec+0x314/0x2980 mm/vmscan.c:6269
 shrink_node_memcgs mm/vmscan.c:6489 [inline]
 shrink_node+0x807/0x3730 mm/vmscan.c:6524
 shrink_zones mm/vmscan.c:6763 [inline]
 do_try_to_free_pages+0x3cf/0x1990 mm/vmscan.c:6825
 try_to_free_mem_cgroup_pages+0x36f/0x850 mm/vmscan.c:7140
 try_charge_memcg+0x460/0x1400 mm/memcontrol.c:2692
 try_charge mm/memcontrol.c:2834 [inline]
 charge_memcg+0x8e/0x2e0 mm/memcontrol.c:6975
 __mem_cgroup_charge+0x2b/0x90 mm/memcontrol.c:6996
 mem_cgroup_charge include/linux/memcontrol.h:681 [inline]
 __filemap_add_folio+0x623/0xe40 mm/filemap.c:860
 filemap_add_folio+0xaf/0x1e0 mm/filemap.c:942
 __filemap_get_folio+0x3a8/0xb00 mm/filemap.c:1947
 grow_dev_page fs/buffer.c:1063 [inline]
 grow_buffers fs/buffer.c:1123 [inline]
 __getblk_slow+0x1fb/0x720 fs/buffer.c:1150
 __getblk_gfp fs/buffer.c:1445 [inline]
 __bread_gfp+0x215/0x310 fs/buffer.c:1479
 sb_bread include/linux/buffer_head.h:349 [inline]
 bfs_find_entry.isra.0+0x310/0x420 fs/bfs/dir.c:337
 bfs_lookup+0x1b5/0x2c0 fs/bfs/dir.c:137
 __lookup_slow+0x24d/0x450 fs/namei.c:1690
 lookup_slow fs/namei.c:1707 [inline]
 walk_component+0x349/0x5a0 fs/namei.c:1998
 lookup_last fs/namei.c:2455 [inline]
 path_lookupat+0x17f/0x770 fs/namei.c:2479
 filename_lookup+0x1e7/0x5b0 fs/namei.c:2508
 vfs_statx+0x160/0x430 fs/stat.c:238
 vfs_fstatat+0x90/0xb0 fs/stat.c:276
 __do_sys_newfstatat+0x98/0x110 fs/stat.c:446
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f45bee7cb29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f45bfca50c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007f45bef9bf80 RCX: 00007f45bee7cb29
RDX: 0000000020000040 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f45beec847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000006000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f45bef9bf80 R15: 00007fff271bd3e8
 </TASK>
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