================================================================== 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:2876 [inline] BUG: KASAN: null-ptr-deref in drop_buffers+0x64/0x4c0 fs/buffer.c:2888 Read of size 4 at addr 0000000000000060 by task syz.5.1356/11210 CPU: 1 UID: 0 PID: 11210 Comm: syz.5.1356 Not tainted 6.13.0-rc7-syzkaller-00191-gfda5e3f28400 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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:492 kasan_report+0x143/0x180 mm/kasan/report.c:602 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:2876 [inline] drop_buffers+0x64/0x4c0 fs/buffer.c:2888 try_to_free_buffers+0x278/0x3b0 fs/buffer.c:2942 shrink_folio_list+0x241e/0x5ca0 mm/vmscan.c:1440 evict_folios+0x3c92/0x58c0 mm/vmscan.c:4600 try_to_shrink_lruvec+0x9a6/0xc70 mm/vmscan.c:4799 lru_gen_shrink_lruvec mm/vmscan.c:4948 [inline] shrink_lruvec+0x53c/0x3160 mm/vmscan.c:5703 shrink_node_memcgs mm/vmscan.c:5939 [inline] shrink_node+0xb15/0x3e50 mm/vmscan.c:5980 shrink_zones mm/vmscan.c:6225 [inline] do_try_to_free_pages+0x78c/0x1cf0 mm/vmscan.c:6287 try_to_free_mem_cgroup_pages+0x48c/0xab0 mm/vmscan.c:6619 try_charge_memcg+0x8c7/0x1150 mm/memcontrol.c:2238 obj_cgroup_charge_pages+0x91/0x230 mm/memcontrol.c:2646 __memcg_kmem_charge_page+0xc8/0x1d0 mm/memcontrol.c:2673 __alloc_pages_noprof+0x2c9/0x710 mm/page_alloc.c:4770 alloc_pages_preferred_many mm/mempolicy.c:2210 [inline] alloc_pages_mpol_noprof+0x277/0x780 mm/mempolicy.c:2234 vm_area_alloc_pages mm/vmalloc.c:3591 [inline] __vmalloc_area_node mm/vmalloc.c:3669 [inline] __vmalloc_node_range_noprof+0x9c9/0x1380 mm/vmalloc.c:3846 __bpf_map_area_alloc kernel/bpf/syscall.c:396 [inline] bpf_map_area_alloc+0xfc/0x120 kernel/bpf/syscall.c:403 bloom_map_alloc+0x21a/0x450 kernel/bpf/bloom_filter.c:146 map_create+0x948/0x11c0 kernel/bpf/syscall.c:1442 __sys_bpf+0x6d1/0x810 kernel/bpf/syscall.c:5772 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline] __se_sys_bpf kernel/bpf/syscall.c:5895 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5895 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7514785d29 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f751564f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f7514975fa0 RCX: 00007f7514785d29 RDX: 0000000000000048 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007f7514801b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7514975fa0 R15: 00007ffc8a6037c8 ==================================================================