================================================================== 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:2787 [inline] BUG: KASAN: null-ptr-deref in drop_buffers+0x99/0x520 fs/buffer.c:2799 Read of size 4 at addr 0000000000000060 by task syz-executor.1/2809 CPU: 1 PID: 2809 Comm: syz-executor.1 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 kasan_report+0xbb/0x1f0 mm/kasan/report.c:495 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 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:2787 [inline] drop_buffers+0x99/0x520 fs/buffer.c:2799 try_to_free_buffers+0x20c/0x2c0 fs/buffer.c:2829 filemap_release_folio+0x15c/0x1a0 mm/filemap.c:3949 shrink_folio_list+0x1cb4/0x35b0 mm/vmscan.c:1982 shrink_inactive_list mm/vmscan.c:2489 [inline] shrink_list mm/vmscan.c:2716 [inline] shrink_lruvec+0xce7/0x26e0 mm/vmscan.c:5888 shrink_node_memcgs mm/vmscan.c:6075 [inline] shrink_node+0x8d2/0x1f30 mm/vmscan.c:6106 shrink_zones mm/vmscan.c:6344 [inline] do_try_to_free_pages+0x3b4/0x17a0 mm/vmscan.c:6406 try_to_free_mem_cgroup_pages+0x3a0/0xa70 mm/vmscan.c:6721 reclaim_high.constprop.0+0x182/0x230 mm/memcontrol.c:2404 mem_cgroup_handle_over_high+0x18c/0x510 mm/memcontrol.c:2589 try_charge_memcg+0xe12/0x12f0 mm/memcontrol.c:2827 obj_cgroup_charge_pages mm/memcontrol.c:3110 [inline] __memcg_kmem_charge_page+0x16a/0x3b0 mm/memcontrol.c:3136 __alloc_pages+0x1ef/0x5a0 mm/page_alloc.c:5563 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2280 vm_area_alloc_pages mm/vmalloc.c:2975 [inline] __vmalloc_area_node mm/vmalloc.c:3043 [inline] __vmalloc_node_range+0x954/0x13a0 mm/vmalloc.c:3213 __bpf_map_area_alloc+0xd5/0x150 kernel/bpf/syscall.c:332 bloom_map_alloc+0x322/0x620 kernel/bpf/bloom_filter.c:145 find_and_alloc_map kernel/bpf/syscall.c:131 [inline] map_create+0x4d3/0x20c0 kernel/bpf/syscall.c:1106 __sys_bpf+0x754/0x4cf0 kernel/bpf/syscall.c:4947 __do_sys_bpf kernel/bpf/syscall.c:5069 [inline] __se_sys_bpf kernel/bpf/syscall.c:5067 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5067 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f6d3d48a5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6d3e5c1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f6d3d5abf80 RCX: 00007f6d3d48a5a9 RDX: 0000000000000048 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007f6d3d4e5580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff195ad9ff R14: 00007f6d3e5c1300 R15: 0000000000022000 ==================================================================