==================================================================
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:2882 [inline]
BUG: KASAN: null-ptr-deref in drop_buffers.constprop.0+0x89/0x340 fs/buffer.c:2894
Read of size 4 at addr 0000000000000060 by task syz-executor.3/8400

CPU: 0 PID: 8400 Comm: syz-executor.3 Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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:601
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0xef/0x190 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:2882 [inline]
 drop_buffers.constprop.0+0x89/0x340 fs/buffer.c:2894
 try_to_free_buffers+0x21a/0x2d0 fs/buffer.c:2924
 filemap_release_folio+0x212/0x270 mm/filemap.c:4087
 shrink_folio_list+0x292c/0x3ea0 mm/vmscan.c:1369
 evict_folios+0x6e7/0x1b90 mm/vmscan.c:4521
 try_to_shrink_lruvec+0x638/0xa10 mm/vmscan.c:4726
 lru_gen_shrink_lruvec mm/vmscan.c:4869 [inline]
 shrink_lruvec+0x314/0x2990 mm/vmscan.c:5647
 shrink_node_memcgs mm/vmscan.c:5867 [inline]
 shrink_node+0x81b/0x3740 mm/vmscan.c:5902
 shrink_zones mm/vmscan.c:6141 [inline]
 do_try_to_free_pages+0x36c/0x1940 mm/vmscan.c:6203
 try_to_free_mem_cgroup_pages+0x31a/0x770 mm/vmscan.c:6518
 try_charge_memcg+0x3d3/0x11a0 mm/memcontrol.c:2762
 obj_cgroup_charge_pages mm/memcontrol.c:3275 [inline]
 __memcg_kmem_charge_page+0xdd/0x2a0 mm/memcontrol.c:3301
 __alloc_pages+0x264/0x2440 mm/page_alloc.c:4584
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:122 [inline]
 bpf_ringbuf_alloc kernel/bpf/ringbuf.c:170 [inline]
 ringbuf_map_alloc kernel/bpf/ringbuf.c:204 [inline]
 ringbuf_map_alloc+0x294/0x790 kernel/bpf/ringbuf.c:186
 map_create+0x548/0x1b90 kernel/bpf/syscall.c:1237
 __sys_bpf+0xa32/0x4a00 kernel/bpf/syscall.c:5439
 __do_sys_bpf kernel/bpf/syscall.c:5561 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5559 [inline]
 __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5559
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fd72467cda9
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:00007fd7253a20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fd7247abf80 RCX: 00007fd72467cda9
RDX: 0000000000000048 RSI: 0000000020000740 RDI: 0000000000000000
RBP: 00007fd7246c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fd7247abf80 R15: 00007ffd5ea4dab8
 </TASK>
==================================================================
general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 0 PID: 8400 Comm: syz-executor.3 Tainted: G    B              6.7.0-syzkaller-09928-g052d534373b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
RIP: 0010:buffer_busy fs/buffer.c:2882 [inline]
RIP: 0010:drop_buffers.constprop.0+0x90/0x340 fs/buffer.c:2894
Code: 4d 8b 76 08 4c 39 f3 0f 84 80 00 00 00 e8 d8 72 87 ff 4d 8d 66 60 be 04 00 00 00 4c 89 e7 e8 07 f0 de ff 4c 89 e0 48 c1 e8 03 <0f> b6 0c 28 4c 89 e0 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85 29
RSP: 0018:ffffc9000353e9b8 EFLAGS: 00010216
RAX: 000000000000000c RBX: ffff888078b19210 RCX: ffffc9000b163000
RDX: 0000000000040000 RSI: ffffffff81df6d17 RDI: 0000000000000007
RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000035c70 R12: 0000000000000060
R13: ffffea00008c4a00 R14: 0000000000000000 R15: ffffea00008c4a28
FS:  00007fd7253a26c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7ab777b038 CR3: 000000001ce3f000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 try_to_free_buffers+0x21a/0x2d0 fs/buffer.c:2924
 filemap_release_folio+0x212/0x270 mm/filemap.c:4087
 shrink_folio_list+0x292c/0x3ea0 mm/vmscan.c:1369
 evict_folios+0x6e7/0x1b90 mm/vmscan.c:4521
 try_to_shrink_lruvec+0x638/0xa10 mm/vmscan.c:4726
 lru_gen_shrink_lruvec mm/vmscan.c:4869 [inline]
 shrink_lruvec+0x314/0x2990 mm/vmscan.c:5647
 shrink_node_memcgs mm/vmscan.c:5867 [inline]
 shrink_node+0x81b/0x3740 mm/vmscan.c:5902
 shrink_zones mm/vmscan.c:6141 [inline]
 do_try_to_free_pages+0x36c/0x1940 mm/vmscan.c:6203
 try_to_free_mem_cgroup_pages+0x31a/0x770 mm/vmscan.c:6518
 try_charge_memcg+0x3d3/0x11a0 mm/memcontrol.c:2762
 obj_cgroup_charge_pages mm/memcontrol.c:3275 [inline]
 __memcg_kmem_charge_page+0xdd/0x2a0 mm/memcontrol.c:3301
 __alloc_pages+0x264/0x2440 mm/page_alloc.c:4584
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:122 [inline]
 bpf_ringbuf_alloc kernel/bpf/ringbuf.c:170 [inline]
 ringbuf_map_alloc kernel/bpf/ringbuf.c:204 [inline]
 ringbuf_map_alloc+0x294/0x790 kernel/bpf/ringbuf.c:186
 map_create+0x548/0x1b90 kernel/bpf/syscall.c:1237
 __sys_bpf+0xa32/0x4a00 kernel/bpf/syscall.c:5439
 __do_sys_bpf kernel/bpf/syscall.c:5561 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5559 [inline]
 __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5559
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fd72467cda9
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:00007fd7253a20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fd7247abf80 RCX: 00007fd72467cda9
RDX: 0000000000000048 RSI: 0000000020000740 RDI: 0000000000000000
RBP: 00007fd7246c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fd7247abf80 R15: 00007ffd5ea4dab8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
RIP: 0010:buffer_busy fs/buffer.c:2882 [inline]
RIP: 0010:drop_buffers.constprop.0+0x90/0x340 fs/buffer.c:2894
Code: 4d 8b 76 08 4c 39 f3 0f 84 80 00 00 00 e8 d8 72 87 ff 4d 8d 66 60 be 04 00 00 00 4c 89 e7 e8 07 f0 de ff 4c 89 e0 48 c1 e8 03 <0f> b6 0c 28 4c 89 e0 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85 29
RSP: 0018:ffffc9000353e9b8 EFLAGS: 00010216
RAX: 000000000000000c RBX: ffff888078b19210 RCX: ffffc9000b163000
RDX: 0000000000040000 RSI: ffffffff81df6d17 RDI: 0000000000000007
RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000035c70 R12: 0000000000000060
R13: ffffea00008c4a00 R14: 0000000000000000 R15: ffffea00008c4a28
FS:  00007fd7253a26c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7ab777b038 CR3: 000000001ce3f000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	4d 8b 76 08          	mov    0x8(%r14),%r14
   4:	4c 39 f3             	cmp    %r14,%rbx
   7:	0f 84 80 00 00 00    	je     0x8d
   d:	e8 d8 72 87 ff       	call   0xff8772ea
  12:	4d 8d 66 60          	lea    0x60(%r14),%r12
  16:	be 04 00 00 00       	mov    $0x4,%esi
  1b:	4c 89 e7             	mov    %r12,%rdi
  1e:	e8 07 f0 de ff       	call   0xffdef02a
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 0c 28          	movzbl (%rax,%rbp,1),%ecx <-- trapping instruction
  2e:	4c 89 e0             	mov    %r12,%rax
  31:	83 e0 07             	and    $0x7,%eax
  34:	83 c0 03             	add    $0x3,%eax
  37:	38 c8                	cmp    %cl,%al
  39:	7c 08                	jl     0x43
  3b:	84 c9                	test   %cl,%cl
  3d:	0f                   	.byte 0xf
  3e:	85 29                	test   %ebp,(%rcx)