general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 303 Comm: syz-executor361 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:vsscanf+0x196/0x24b0 lib/vsprintf.c:3450
Code: 48 c7 c6 80 cf 99 86 e8 c8 a4 f7 fe 41 83 fe 25 74 4d 45 85 f6 0f 84 b6 21 00 00 48 ff c3 48 89 5c 24 78 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 4f 1b 00 00 41 0f b6 1f 45 0f b6 f6 44
RSP: 0018:ffffc900009875e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffff854b5541 RCX: 0000000000000001
RDX: ffffffff82721758 RSI: ffffffff8699cf80 RDI: 0000000000000030
RBP: ffffc90000987710 R08: ffff88811df4a780 R09: 0000000000000002
R10: 0000000000000025 R11: 0000000000000000 R12: ffffffff854b5540
R13: dffffc0000000000 R14: 0000000000000030 R15: 0000000000000000
FS:  000055556aba23c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000240 CR3: 0000000125c9e000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sscanf+0xdf/0x130 lib/vsprintf.c:3708
 split_huge_pages_write+0x30d/0xfc0 mm/huge_memory.c:3134
 full_proxy_write+0x10f/0x1c0 fs/debugfs/file.c:244
 vfs_write+0x404/0xfd0 fs/read_write.c:592
 ksys_write+0x14a/0x260 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:656
 x64_sys_call+0x8ef/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f45e65e0c39
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffde66a46d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0067756265642f2e RCX: 00007f45e65e0c39
RDX: 0000000000000005 RSI: 0000200000000600 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffde66a4808
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffde66a47f8
R13: 0000000000000002 R14: 00007f45e6671ca0 R15: 0000000000000002
 </TASK>
Modules linked in:
---[ end trace bfe45dab523c64d9 ]---
RIP: 0010:vsscanf+0x196/0x24b0 lib/vsprintf.c:3450
Code: 48 c7 c6 80 cf 99 86 e8 c8 a4 f7 fe 41 83 fe 25 74 4d 45 85 f6 0f 84 b6 21 00 00 48 ff c3 48 89 5c 24 78 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 4f 1b 00 00 41 0f b6 1f 45 0f b6 f6 44
RSP: 0018:ffffc900009875e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffff854b5541 RCX: 0000000000000001
RDX: ffffffff82721758 RSI: ffffffff8699cf80 RDI: 0000000000000030
RBP: ffffc90000987710 R08: ffff88811df4a780 R09: 0000000000000002
R10: 0000000000000025 R11: 0000000000000000 R12: ffffffff854b5540
R13: dffffc0000000000 R14: 0000000000000030 R15: 0000000000000000
FS:  000055556aba23c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000240 CR3: 0000000125c9e000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 c7 c6 80 cf 99 86 	mov    $0xffffffff8699cf80,%rsi
   7:	e8 c8 a4 f7 fe       	call   0xfef7a4d4
   c:	41 83 fe 25          	cmp    $0x25,%r14d
  10:	74 4d                	je     0x5f
  12:	45 85 f6             	test   %r14d,%r14d
  15:	0f 84 b6 21 00 00    	je     0x21d1
  1b:	48 ff c3             	inc    %rbx
  1e:	48 89 5c 24 78       	mov    %rbx,0x78(%rsp)
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 4f 1b 00 00    	jne    0x1b86
  37:	41 0f b6 1f          	movzbl (%r15),%ebx
  3b:	45 0f b6 f6          	movzbl %r14b,%r14d
  3f:	44                   	rex.R