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Tue, 18 Nov 2025 00:46:14 -0800 (PST) Date: Tue, 18 Nov 2025 00:46:14 -0800 In-Reply-To: <20251117224701.1279139-1-ackerleytng@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <691c3256.a70a0220.3124cb.00b6.GAE@google.com> Subject: [syzbot ci] Re: Extend xas_split* to support splitting arbitrarily large entries From: syzbot ci To: ackerleytng@google.com, akpm@linux-foundation.org, david@redhat.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, michael.roth@amd.com, vannapurve@google.com, willy@infradead.org Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 1BCC61C0010 X-Stat-Signature: yskhj34gzzhaw1o8xeip9yy38r17hwym X-Rspam-User: X-HE-Tag: 1763455574-29207 X-HE-Meta: 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 OyGbHd2y 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 S+/CI860 81yZNfwZYSvjXiZS/W5Ke+YO5PG/+3QYhoHHog/ZC4TrMcu2vkwbt0GMUKAdre5pWKSzLFTILVzfLRxDslV9OhlgBM9z8cZk+gZBSnuSmI0= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: syzbot ci has tested the following series [v1] Extend xas_split* to support splitting arbitrarily large entries https://lore.kernel.org/all/20251117224701.1279139-1-ackerleytng@google.com * [RFC PATCH 1/4] XArray: Initialize nodes while splitting instead of while allocating * [RFC PATCH 2/4] XArray: Update xas_split_alloc() to allocate enough nodes to split large entries * [RFC PATCH 3/4] XArray: Support splitting for arbitrarily large entries * [RFC PATCH 4/4] XArray: test: Increase split order test range in check_split() and found the following issue: WARNING: kmalloc bug in bpf_prog_alloc_no_stats Full report is available here: https://ci.syzbot.org/series/aa74d39d-0773-4398-bb90-0a6d21365c3d *** WARNING: kmalloc bug in bpf_prog_alloc_no_stats tree: mm-new URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git base: 41218ede767f6b218185af65ce919d0cade75f6b arch: amd64 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 config: https://ci.syzbot.org/builds/c26972f6-b81e-4d6f-bead-3d77003cf075/config ------------[ cut here ]------------ Unexpected gfp: 0x400000 (__GFP_ACCOUNT). Fixing up to gfp: 0xdc0 (GFP_KERNEL|__GFP_ZERO). Fix your code! WARNING: CPU: 0 PID: 6465 at mm/vmalloc.c:3938 vmalloc_fix_flags+0x9c/0xe0 Modules linked in: CPU: 0 UID: 0 PID: 6465 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:vmalloc_fix_flags+0x9c/0xe0 Code: 81 e6 1f 52 ee ff 89 74 24 30 81 e3 e0 ad 11 00 89 5c 24 20 90 48 c7 c7 c0 b9 76 8b 4c 89 fa 89 d9 4d 89 f0 e8 75 2b 6e ff 90 <0f> 0b 90 90 8b 44 24 20 48 c7 04 24 0e 36 e0 45 4b c7 04 2c 00 00 RSP: 0018:ffffc90005d7fb00 EFLAGS: 00010246 RAX: 6e85c22fb4362300 RBX: 0000000000000dc0 RCX: ffff888176898000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: ffffc90005d7fb98 R08: ffff888121224293 R09: 1ffff11024244852 R10: dffffc0000000000 R11: ffffed1024244853 R12: 1ffff92000baff60 R13: dffffc0000000000 R14: ffffc90005d7fb20 R15: ffffc90005d7fb30 FS: 000055555be14500(0000) GS:ffff88818eb36000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f653e85c470 CR3: 00000001139ec000 CR4: 00000000000006f0 Call Trace: __vmalloc_noprof+0xf2/0x120 bpf_prog_alloc_no_stats+0x4a/0x4d0 bpf_prog_alloc+0x3c/0x1a0 bpf_prog_create_from_user+0xa7/0x440 do_seccomp+0x7b1/0xd90 __se_sys_prctl+0xc3c/0x1830 do_syscall_64+0xfa/0xfa0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f653e990b0d Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 18 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 9d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 1b 48 8b 54 24 18 64 48 2b 14 25 28 00 00 00 RSP: 002b:00007fffbd3687c0 EFLAGS: 00000246 ORIG_RAX: 000000000000009d RAX: ffffffffffffffda RBX: 00007f653ea2cf80 RCX: 00007f653e990b0d RDX: 00007fffbd368820 RSI: 0000000000000002 RDI: 0000000000000016 RBP: 00007fffbd368830 R08: 0000000000000006 R09: 0000000000000071 R10: 0000000000000071 R11: 0000000000000246 R12: 000000000000006d R13: 00007fffbd368c58 R14: 00007fffbd368ed8 R15: 0000000000000000 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com.