Hello, syzbot found the following issue on: HEAD commit: 3022e9d00ebe Merge tag 'sched_ext-for-6.12-rc7-fixes' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=119f8ce8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=327b6119dd928cbc dashboard link: https://syzkaller.appspot.com/bug?extid=09b7d050e4806540153d 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=1656a4c0580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=159f8ce8580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-3022e9d0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6539389f3983/vmlinux-3022e9d0.xz kernel image: https://storage.googleapis.com/syzbot-assets/9ee2dbf68ed6/bzImage-3022e9d0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+09b7d050e4806540153d@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 32263067 P4D 32263067 PUD 32264067 PMD 0 Oops: Oops: 0010 [#1] PREEMPT SMP KASAN NOPTI CPU: 3 UID: 0 PID: 5935 Comm: syz-executor262 Not tainted 6.12.0-rc7-syzkaller-00012-g3022e9d00ebe #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc900036a79c8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81c26c1f RDX: ffff8880289da440 RSI: ffffea0000e995c0 RDI: ffff888029a421c0 RBP: ffffea0000e995c0 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff961d8908 R12: 1ffff920006d4f3a R13: ffff888029a421c0 R14: 0000000000000000 R15: dffffc0000000000 FS: 000055557e035380(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000031818000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> filemap_read_folio+0xc6/0x2a0 mm/filemap.c:2367 do_read_cache_folio+0x263/0x5c0 mm/filemap.c:3825 freader_get_folio+0x337/0x8e0 lib/buildid.c:77 freader_fetch+0xc2/0x5f0 lib/buildid.c:120 __build_id_parse.isra.0+0xed/0x7a0 lib/buildid.c:305 do_procmap_query+0xd62/0x1030 fs/proc/task_mmu.c:534 procfs_procmap_ioctl+0x7d/0xb0 fs/proc/task_mmu.c:613 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893 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: 0033:0x7f5f4c4436e9 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:00007ffde11efd68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffde11efd70 RCX: 00007f5f4c4436e9 RDX: 0000000020000180 RSI: 00000000c0686611 RDI: 0000000000000004 RBP: 00007f5f4c4b6610 R08: 0000000000000000 R09: 65732f636f72702f R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffde11effa8 R14: 0000000000000001 R15: 0000000000000001 </TASK> Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc900036a79c8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81c26c1f RDX: ffff8880289da440 RSI: ffffea0000e995c0 RDI: ffff888029a421c0 RBP: ffffea0000e995c0 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff961d8908 R12: 1ffff920006d4f3a R13: ffff888029a421c0 R14: 0000000000000000 R15: dffffc0000000000 FS: 000055557e035380(0000) GS:ffff88806a900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000031818000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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
