Hello, syzbot found the following issue on: HEAD commit: be5d4872e528 Add linux-next specific files for 20250905 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=10f70962580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a726684450a7d788 dashboard link: https://syzkaller.appspot.com/bug?extid=634e67b3f57206befe3c compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1247a962580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12751134580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f67121360b62/disk-be5d4872.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4f666ca2e57f/vmlinux-be5d4872.xz kernel image: https://storage.googleapis.com/syzbot-assets/e86b794b985e/bzImage-be5d4872.xz The issue was bisected to: commit db076b5db550aa34169dceee81d0974c7b2a2482 Author: David Hildenbrand <david@xxxxxxxxxx> Date: Mon Sep 1 15:03:40 2025 +0000 mm/gup: remove record_subpages() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=173c0642580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=14bc0642580000 console output: https://syzkaller.appspot.com/x/log.txt?x=10bc0642580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+634e67b3f57206befe3c@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: db076b5db550 ("mm/gup: remove record_subpages()") ================================================================== BUG: KASAN: wild-memory-access in crypto_nhpoly1305_update_helper+0x156/0x390 crypto/nhpoly1305.c:165 Read of size 15 at addr 0005088000000000 by task syz.0.17/6036 CPU: 0 UID: 0 PID: 6036 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 kasan_report+0x118/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 crypto_nhpoly1305_update_helper+0x156/0x390 crypto/nhpoly1305.c:165 nhpoly1305_sse2_update+0x68/0xb0 arch/x86/crypto/nhpoly1305-sse2-glue.c:29 crypto_shash_update include/crypto/hash.h:1006 [inline] shash_ahash_update+0x213/0x2f0 crypto/ahash.c:178 hash_sendmsg+0x96b/0x11d0 crypto/algif_hash.c:149 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:729 ____sys_sendmsg+0x52d/0x830 net/socket.c:2614 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668 __sys_sendmmsg+0x227/0x430 net/socket.c:2757 __do_sys_sendmmsg net/socket.c:2784 [inline] __se_sys_sendmmsg net/socket.c:2781 [inline] __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2781 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdaa258ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc3b406218 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fdaa27c5fa0 RCX: 00007fdaa258ebe9 RDX: 0000000000000001 RSI: 0000200000004140 RDI: 0000000000000006 RBP: 00007fdaa2611e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdaa27c5fa0 R14: 00007fdaa27c5fa0 R15: 0000000000000004 </TASK> ================================================================== --- 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
