Hello, syzbot found the following issue on: HEAD commit: 11a299a7933e Merge tag 'for-6.12/block-20240925' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1549da80580000 kernel config: https://syzkaller.appspot.com/x/.config?x=25e41eb82fab6c0b dashboard link: https://syzkaller.appspot.com/bug?extid=d9efec94dcbfa0de1c07 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1349da80580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15870507980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-11a299a7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b59f47d0c0da/vmlinux-11a299a7.xz kernel image: https://storage.googleapis.com/syzbot-assets/bf395abcfb64/bzImage-11a299a7.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d9efec94dcbfa0de1c07@xxxxxxxxxxxxxxxxxxxxxxxxx RBP: 0000000000000001 R08: 00007fff0dcc56f7 R09: 00000000000000a0 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000001 R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 </TASK> Oops: general protection fault, probably for non-canonical address 0xdffffc0000000022: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000110-0x0000000000000117] CPU: 0 UID: 0 PID: 5106 Comm: syz-executor776 Not tainted 6.11.0-syzkaller-10669-g11a299a7933e #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ovl_llseek+0x2a4/0x3f0 fs/overlayfs/file.c:214 Code: 8d 7c 24 60 e8 ad db e0 fe 48 8b 44 24 60 48 89 44 24 30 48 83 e0 fc 48 89 44 24 20 4c 8d b0 20 01 00 00 4d 89 f7 49 c1 ef 03 <43> 80 3c 27 00 74 08 4c 89 f7 e8 6d dc e0 fe 49 89 1e 48 8b 1c 24 RSP: 0018:ffffc90002d6fe00 EFLAGS: 00010207 RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8c610080 RDI: 0000000000000001 RBP: ffffc90002d6fec8 R08: ffffffff901ce56f R09: 1ffffffff2039cad R10: dffffc0000000000 R11: fffffbfff2039cae R12: dffffc0000000000 R13: 1ffff11007b2e7ac R14: 0000000000000114 R15: 0000000000000022 FS: 0000555590dd5380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcababb3226 CR3: 000000004186a000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> vfs_llseek fs/read_write.c:382 [inline] ksys_lseek fs/read_write.c:395 [inline] __do_sys_lseek fs/read_write.c:406 [inline] __se_sys_lseek fs/read_write.c:404 [inline] __x64_sys_lseek+0x150/0x1e0 fs/read_write.c:404 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: 0033:0x7fcabab5d8e9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 1a 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff0dcc5958 EFLAGS: 00000246 ORIG_RAX: 0000000000000008 RAX: ffffffffffffffda RBX: 00007fff0dcc5970 RCX: 00007fcabab5d8e9 RDX: 0000000000000000 RSI: 0000000000010000 RDI: 0000000000000004 RBP: 0000000000000001 R08: 00007fff0dcc56f7 R09: 00000000000000a0 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000001 R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ovl_llseek+0x2a4/0x3f0 fs/overlayfs/file.c:214 Code: 8d 7c 24 60 e8 ad db e0 fe 48 8b 44 24 60 48 89 44 24 30 48 83 e0 fc 48 89 44 24 20 4c 8d b0 20 01 00 00 4d 89 f7 49 c1 ef 03 <43> 80 3c 27 00 74 08 4c 89 f7 e8 6d dc e0 fe 49 89 1e 48 8b 1c 24 RSP: 0018:ffffc90002d6fe00 EFLAGS: 00010207 RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8c610080 RDI: 0000000000000001 RBP: ffffc90002d6fec8 R08: ffffffff901ce56f R09: 1ffffffff2039cad R10: dffffc0000000000 R11: fffffbfff2039cae R12: dffffc0000000000 R13: 1ffff11007b2e7ac R14: 0000000000000114 R15: 0000000000000022 FS: 0000555590dd5380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcababb3226 CR3: 000000004186a000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8d 7c 24 60 lea 0x60(%rsp),%edi 4: e8 ad db e0 fe call 0xfee0dbb6 9: 48 8b 44 24 60 mov 0x60(%rsp),%rax e: 48 89 44 24 30 mov %rax,0x30(%rsp) 13: 48 83 e0 fc and $0xfffffffffffffffc,%rax 17: 48 89 44 24 20 mov %rax,0x20(%rsp) 1c: 4c 8d b0 20 01 00 00 lea 0x120(%rax),%r14 23: 4d 89 f7 mov %r14,%r15 26: 49 c1 ef 03 shr $0x3,%r15 * 2a: 43 80 3c 27 00 cmpb $0x0,(%r15,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 f7 mov %r14,%rdi 34: e8 6d dc e0 fe call 0xfee0dca6 39: 49 89 1e mov %rbx,(%r14) 3c: 48 8b 1c 24 mov (%rsp),%rbx --- 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
