Hello, syzbot found the following issue on: HEAD commit: b91872c56940 Merge tag 'dmaengine-fix-6.14' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1485e8b7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=8de9cc84d5960254 dashboard link: https://syzkaller.appspot.com/bug?extid=4364ec1693041cad20de 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=149d55a8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4b855669df70/disk-b91872c5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e44f3c546271/vmlinux-b91872c5.xz kernel image: https://storage.googleapis.com/syzbot-assets/b106e670346a/bzImage-b91872c5.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/68b26fa478ee/mount_0.gz The issue was bisected to: commit 579cd64b9df8a60284ec3422be919c362de40e41 Author: Hector Martin <marcan@xxxxxxxxx> Date: Sat Feb 8 00:54:35 2025 +0000 ASoC: tas2770: Fix volume scale bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14aa03a8580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=16aa03a8580000 console output: https://syzkaller.appspot.com/x/log.txt?x=12aa03a8580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4364ec1693041cad20de@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 579cd64b9df8 ("ASoC: tas2770: Fix volume scale") 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: 5490 Comm: dhcpcd Not tainted 6.14.0-rc4-syzkaller-00295-gb91872c56940 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:sysctl_is_seen fs/proc/proc_sysctl.c:907 [inline] RIP: 0010:proc_sys_compare+0x1ba/0x260 fs/proc/proc_sysctl.c:932 Code: 09 89 c5 31 ff 89 c6 e8 04 b2 5e ff 85 ed 74 56 80 3d d2 ae c2 0d 01 75 6f e8 b2 ad 5e ff e9 74 ff ff ff 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 d7 61 c3 ff 48 8b 5d 00 48 85 db RSP: 0018:ffffc90003547718 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffff8c3b6218 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc900035476a0 RBP: 0000000000000000 R08: 0000000000000003 R09: fffff520006a8ed4 R10: dffffc0000000000 R11: fffff520006a8ed4 R12: 0000000000000004 R13: dffffc0000000000 R14: ffff88806c232c30 R15: ffff88806c040020 FS: 00007f2e2350e740(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056042d48d000 CR3: 000000001e6d2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> d_same_name fs/dcache.c:2137 [inline] __d_lookup+0x533/0x7b0 fs/dcache.c:2361 lookup_fast+0x79/0x590 fs/namei.c:1751 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: 0033:0x7f2e235d89a4 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:00007ffcef5bc920 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00000000000100a0 RCX: 00007f2e235d89a4 RDX: 0000000000000000 RSI: 00007ffcef5ccbb8 RDI: 00000000ffffff9c RBP: 00007ffcef5ccbb8 R08: 0000000000000000 R09: 00007ffcef5ccb28 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcef5bca38 R14: 00007ffcef5bca38 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:sysctl_is_seen fs/proc/proc_sysctl.c:907 [inline] RIP: 0010:proc_sys_compare+0x1ba/0x260 fs/proc/proc_sysctl.c:932 Code: 09 89 c5 31 ff 89 c6 e8 04 b2 5e ff 85 ed 74 56 80 3d d2 ae c2 0d 01 75 6f e8 b2 ad 5e ff e9 74 ff ff ff 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 d7 61 c3 ff 48 8b 5d 00 48 85 db RSP: 0018:ffffc90003547718 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffff8c3b6218 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc900035476a0 RBP: 0000000000000000 R08: 0000000000000003 R09: fffff520006a8ed4 R10: dffffc0000000000 R11: fffff520006a8ed4 R12: 0000000000000004 R13: dffffc0000000000 R14: ffff88806c232c30 R15: ffff88806c040020 FS: 00007f2e2350e740(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056042d48d000 CR3: 000000001e6d2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 89 c5 mov %eax,%ebp 2: 31 ff xor %edi,%edi 4: 89 c6 mov %eax,%esi 6: e8 04 b2 5e ff call 0xff5eb20f b: 85 ed test %ebp,%ebp d: 74 56 je 0x65 f: 80 3d d2 ae c2 0d 01 cmpb $0x1,0xdc2aed2(%rip) # 0xdc2aee8 16: 75 6f jne 0x87 18: e8 b2 ad 5e ff call 0xff5eadcf 1d: e9 74 ff ff ff jmp 0xffffff96 22: 48 89 e8 mov %rbp,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 ef mov %rbp,%rdi 33: e8 d7 61 c3 ff call 0xffc3620f 38: 48 8b 5d 00 mov 0x0(%rbp),%rbx 3c: 48 85 db test %rbx,%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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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
