Hello, syzbot found the following issue on: HEAD commit: ad1b832bf1cf Merge tag 'devicetree-fixes-for-6.14-1' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=150197df980000 kernel config: https://syzkaller.appspot.com/x/.config?x=c776e555cfbdb82d dashboard link: https://syzkaller.appspot.com/bug?extid=a3f3ed84ec8cc241ff9e 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=113ed5a4580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-ad1b832b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/64103cb6fc45/vmlinux-ad1b832b.xz kernel image: https://storage.googleapis.com/syzbot-assets/9bc34ac014d0/bzImage-ad1b832b.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/9f5f306c6e6e/mount_1.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a3f3ed84ec8cc241ff9e@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: unable to handle page fault for address: ffffffffffffffcf #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD e93c067 P4D e93c067 PUD e93e067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5322 Comm: udevd Not tainted 6.14.0-rc2-syzkaller-00303-gad1b832bf1cf #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:__seqprop_spinlock_sequence include/linux/seqlock.h:227 [inline] RIP: 0010:__d_lookup_rcu+0x18d/0x490 fs/dcache.c:2264 Code: 00 00 00 00 89 44 24 24 4c 89 6c 24 30 4c 89 7c 24 28 48 8d 7d c8 48 89 f8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 bb 01 00 00 <44> 8b 75 c8 48 8d 5d 10 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 RSP: 0018:ffffc9000d13f768 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888042a8cd88 RCX: ffff888000a10000 RDX: 0000000000000000 RSI: ffff888042a8cd78 RDI: ffffffffffffffcf RBP: 0000000000000007 R08: ffffffff82419fdc R09: 1ffff92000076d24 R10: dffffc0000000000 R11: fffff52000076d25 R12: dffffc0000000000 R13: ffff88801d03fbe8 R14: 0000000000000000 R15: 0000000000000004 FS: 00007fd7f3eb2280(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffcf CR3: 0000000012b1a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> lookup_fast+0xca/0x590 fs/namei.c:1727 walk_component fs/namei.c:2110 [inline] link_path_walk+0x672/0xea0 fs/namei.c:2479 path_openat+0x266/0x3590 fs/namei.c:3985 do_filp_open+0x27f/0x4e0 fs/namei.c:4016 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428 do_sys_open fs/open.c:1443 [inline] __do_sys_openat fs/open.c:1459 [inline] __se_sys_openat fs/open.c:1454 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1454 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: 0033:0x7fd7f3f859a4 Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffd67ebfd80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007fd7f3f859a4 RDX: 0000000000080000 RSI: 00007ffd67ebfeb8 RDI: 00000000ffffff9c RBP: 00007ffd67ebfeb8 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000 R13: 0000562f3212db42 R14: 0000000000000001 R15: 0000562f32149160 </TASK> Modules linked in: CR2: ffffffffffffffcf ---[ end trace 0000000000000000 ]--- RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:227 [inline] RIP: 0010:__d_lookup_rcu+0x18d/0x490 fs/dcache.c:2264 Code: 00 00 00 00 89 44 24 24 4c 89 6c 24 30 4c 89 7c 24 28 48 8d 7d c8 48 89 f8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 bb 01 00 00 <44> 8b 75 c8 48 8d 5d 10 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 RSP: 0018:ffffc9000d13f768 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888042a8cd88 RCX: ffff888000a10000 RDX: 0000000000000000 RSI: ffff888042a8cd78 RDI: ffffffffffffffcf RBP: 0000000000000007 R08: ffffffff82419fdc R09: 1ffff92000076d24 R10: dffffc0000000000 R11: fffff52000076d25 R12: dffffc0000000000 R13: ffff88801d03fbe8 R14: 0000000000000000 R15: 0000000000000004 FS: 00007fd7f3eb2280(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffcf CR3: 0000000012b1a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 89 44 24 24 mov %eax,0x24(%rsp) 8: 4c 89 6c 24 30 mov %r13,0x30(%rsp) d: 4c 89 7c 24 28 mov %r15,0x28(%rsp) 12: 48 8d 7d c8 lea -0x38(%rbp),%rdi 16: 48 89 f8 mov %rdi,%rax 19: 48 c1 e8 03 shr $0x3,%rax 1d: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax 22: 84 c0 test %al,%al 24: 0f 85 bb 01 00 00 jne 0x1e5 * 2a: 44 8b 75 c8 mov -0x38(%rbp),%r14d <-- trapping instruction 2e: 48 8d 5d 10 lea 0x10(%rbp),%rbx 32: 48 89 d8 mov %rbx,%rax 35: 48 c1 e8 03 shr $0x3,%rax 39: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 3e: 74 08 je 0x48 --- 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
