Hello, syzbot found the following issue on: HEAD commit: f92f4749861b Merge tag 'clk-fixes-for-linus' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=116904f8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=99a5586995ec03b2 dashboard link: https://syzkaller.appspot.com/bug?extid=8a3da2f1bbf59227c289 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15758d44580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=156904f8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b85403132ddc/disk-f92f4749.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/20613d034287/vmlinux-f92f4749.xz kernel image: https://storage.googleapis.com/syzbot-assets/d1ea80bf7e4e/bzImage-f92f4749.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8a3da2f1bbf59227c289@xxxxxxxxxxxxxxxxxxxxxxxxx Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 5823 Comm: syz-executor234 Not tainted 6.13.0-rc2-syzkaller-00031-gf92f4749861b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:vsscanf+0x1a4/0x2a30 lib/vsprintf.c:3466 Code: db 74 5e e8 1e da 82 f6 49 8d 5d 01 48 89 e9 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 48 89 5c 24 70 49 89 dc 41 0f b6 45 00 <0f> b6 14 11 48 89 e9 83 e1 07 38 ca 7f 08 84 d2 0f 85 1e 19 00 00 RSP: 0018:ffffc90003cc7668 EFLAGS: 00010246 RAX: 0000000000000030 RBX: ffffffff8b5c7801 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff8b1663d2 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000030 R11: 00000000000a2001 R12: ffffffff8b5c7801 R13: ffffffff8b5c7800 R14: dffffc0000000000 R15: ffffc90003cc7eb0 FS: 0000555573fa8380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 0000000073a06000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> sscanf+0xc8/0x100 lib/vsprintf.c:3722 split_huge_pages_write+0xa16/0x1f60 mm/huge_memory.c:4178 full_proxy_write+0xfb/0x1b0 fs/debugfs/file.c:356 vfs_write+0x24c/0x1150 fs/read_write.c:677 ksys_write+0x12b/0x250 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9a505582e9 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdae2774c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffdae277698 RCX: 00007f9a505582e9 RDX: 0000000000000004 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00007f9a505cb610 R08: 0000000000000000 R09: 00007ffdae277698 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdae277688 R14: 0000000000000001 R15: 0000000000000001 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vsscanf+0x1a4/0x2a30 lib/vsprintf.c:3466 Code: db 74 5e e8 1e da 82 f6 49 8d 5d 01 48 89 e9 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 48 89 5c 24 70 49 89 dc 41 0f b6 45 00 <0f> b6 14 11 48 89 e9 83 e1 07 38 ca 7f 08 84 d2 0f 85 1e 19 00 00 RSP: 0018:ffffc90003cc7668 EFLAGS: 00010246 RAX: 0000000000000030 RBX: ffffffff8b5c7801 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff8b1663d2 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000030 R11: 00000000000a2001 R12: ffffffff8b5c7801 R13: ffffffff8b5c7800 R14: dffffc0000000000 R15: ffffc90003cc7eb0 FS: 0000555573fa8380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 0000000073a06000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 74 5e je 0x60 2: e8 1e da 82 f6 call 0xf682da25 7: 49 8d 5d 01 lea 0x1(%r13),%rbx b: 48 89 e9 mov %rbp,%rcx e: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 15: fc ff df 18: 48 c1 e9 03 shr $0x3,%rcx 1c: 48 89 5c 24 70 mov %rbx,0x70(%rsp) 21: 49 89 dc mov %rbx,%r12 24: 41 0f b6 45 00 movzbl 0x0(%r13),%eax * 29: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx <-- trapping instruction 2d: 48 89 e9 mov %rbp,%rcx 30: 83 e1 07 and $0x7,%ecx 33: 38 ca cmp %cl,%dl 35: 7f 08 jg 0x3f 37: 84 d2 test %dl,%dl 39: 0f 85 1e 19 00 00 jne 0x195d --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
