Hello, syzbot found the following issue on: HEAD commit: c02d24a5af66 Add linux-next specific files for 20241003 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=1113e307980000 kernel config: https://syzkaller.appspot.com/x/.config?x=94f9caf16c0af42d dashboard link: https://syzkaller.appspot.com/bug?extid=b2f95ad40a2119295cc1 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=14bc33d0580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11772b9f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/641e642c9432/disk-c02d24a5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/98aaf20c29e0/vmlinux-c02d24a5.xz kernel image: https://storage.googleapis.com/syzbot-assets/c23099f2d86b/bzImage-c02d24a5.xz The issue was bisected to: commit d0a38fad51cc70ab3dd3c59b54d8079ac19220b9 Author: Feng Tang <feng.tang@xxxxxxxxx> Date: Wed Sep 11 06:45:34 2024 +0000 mm/slub: Improve redzone check and zeroing for krealloc() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15191307980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=17191307980000 console output: https://syzkaller.appspot.com/x/log.txt?x=13191307980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b2f95ad40a2119295cc1@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: d0a38fad51cc ("mm/slub: Improve redzone check and zeroing for krealloc()") ------------[ cut here ]------------ virt_to_cache: Object is not a Slab page! WARNING: CPU: 0 PID: 5236 at mm/slub.c:4655 virt_to_cache mm/slub.c:4655 [inline] WARNING: CPU: 0 PID: 5236 at mm/slub.c:4655 __do_krealloc mm/slub.c:4753 [inline] WARNING: CPU: 0 PID: 5236 at mm/slub.c:4655 krealloc_noprof+0x1b3/0x2e0 mm/slub.c:4838 Modules linked in: CPU: 0 UID: 0 PID: 5236 Comm: syz-executor185 Not tainted 6.12.0-rc1-next-20241003-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:virt_to_cache mm/slub.c:4655 [inline] RIP: 0010:__do_krealloc mm/slub.c:4753 [inline] RIP: 0010:krealloc_noprof+0x1b3/0x2e0 mm/slub.c:4838 Code: 45 31 ff 45 31 f6 45 31 ed e9 21 ff ff ff c6 05 4e 2a 14 0e 01 90 48 c7 c7 24 f2 0b 8e 48 c7 c6 44 f2 0b 8e e8 3e 19 63 ff 90 <0f> 0b 90 90 e9 d9 fe ff ff f3 0f 1e fa 41 8b 45 08 f7 d0 a8 88 0f RSP: 0018:ffffc900039ce958 EFLAGS: 00010246 RAX: d5f86d2e4537eb00 RBX: 0000000000000000 RCX: ffff88802bd81e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8880276c0000 R08: ffffffff8155d412 R09: 1ffff110170c519a R10: dffffc0000000000 R11: ffffed10170c519b R12: 0000000000004000 R13: 00000000000002ac R14: 0000000000000cc0 R15: 00000000000002ac FS: 000055555e044380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005564fc7f1000 CR3: 0000000079940000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> realloc_array kernel/bpf/verifier.c:1247 [inline] resize_reference_state kernel/bpf/verifier.c:1287 [inline] acquire_reference_state+0x136/0x460 kernel/bpf/verifier.c:1334 check_helper_call+0x65cc/0x7660 kernel/bpf/verifier.c:10897 do_check+0x9954/0xfe40 kernel/bpf/verifier.c:18529 do_check_common+0x14bd/0x1dd0 kernel/bpf/verifier.c:21618 do_check_main kernel/bpf/verifier.c:21709 [inline] bpf_check+0x18a25/0x1e320 kernel/bpf/verifier.c:22421 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2846 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5634 __do_sys_bpf kernel/bpf/syscall.c:5741 [inline] __se_sys_bpf kernel/bpf/syscall.c:5739 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5739 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: 0033:0x7f922052d669 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:00007ffc58143c38 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007ffc58143e08 RCX: 00007f922052d669 RDX: 0000000000000090 RSI: 0000000020000840 RDI: 0000000000000005 RBP: 00007f92205a0610 R08: 00007ffc58143e08 R09: 00007ffc58143e08 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc58143df8 R14: 0000000000000001 R15: 0000000000000001 </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
