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Wed, 12 Nov 2025 23:41:37 -0800 (PST) Date: Wed, 12 Nov 2025 23:41:37 -0800 In-Reply-To: <20251112185834.32487-1-vishal.moola@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69158bb1.a70a0220.3124cb.001e.GAE@google.com> Subject: [syzbot ci] Re: make vmalloc gfp flags usage more apparent From: syzbot ci To: akpm@linux-foundation.org, bpf@vger.kernel.org, hch@infradead.org, hch@lst.de, linux-kernel@vger.kernel.org, linux-mm@kvack.org, urezki@gmail.com, vishal.moola@gmail.com Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 7785140006 X-Stat-Signature: 8ojc8neuwep3dayfgesshicecmyigmdh X-Rspam-User: X-HE-Tag: 1763019698-266520 X-HE-Meta: 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 lA4Kcm7j 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 VoAcN1DY J72fgurSZiKiL0nlA77Oq6uV1Et4w3LZRmMps2OlpQHMLcsHdXt0zkzF6E75jby0jxJqMm0/OoSqurLIQiAkkULUGMPtz7raH2pbVd+Wlig= 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 [v2] make vmalloc gfp flags usage more apparent https://lore.kernel.org/all/20251112185834.32487-1-vishal.moola@gmail.com * [PATCH v2 1/4] mm/vmalloc: warn on invalid vmalloc gfp flags * [PATCH v2 2/4] mm/vmalloc: Add a helper to optimize vmalloc allocation gfps * [PATCH v2 3/4] mm/vmalloc: cleanup large_gfp in vm_area_alloc_pages() * [PATCH v2 4/4] mm/vmalloc: cleanup gfp flag use in new_vmap_block() and found the following issue: WARNING: kmalloc bug in bpf_prog_alloc_no_stats Full report is available here: https://ci.syzbot.org/series/46d6cb1a-188d-4ff5-8fab-9c58465d74d3 *** WARNING: kmalloc bug in bpf_prog_alloc_no_stats tree: linux-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next base: b179ce312bafcb8c68dc718e015aee79b7939ff0 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/3449e2a5-35e0-4eac-86c6-97ca0ec741d7/config ------------[ cut here ]------------ Unexpected gfp: 0x400000 (__GFP_ACCOUNT). Fixing up to gfp: 0xdc0 (GFP_KERNEL|__GFP_ZERO). Fix your code! WARNING: mm/vmalloc.c:3938 at vmalloc_fix_flags+0x9c/0xe0, CPU#1: syz-executor/6079 Modules linked in: CPU: 1 UID: 0 PID: 6079 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 40 c3 76 8b 4c 89 fa 89 d9 4d 89 f0 e8 a5 a1 6c 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:ffffc90005557b00 EFLAGS: 00010246 RAX: a6bff5ae8e950700 RBX: 0000000000000dc0 RCX: ffff888173b29d40 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc90005557b98 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bba6ec R12: 1ffff92000aaaf60 R13: dffffc0000000000 R14: ffffc90005557b20 R15: ffffc90005557b30 FS: 000055557c070500(0000) GS:ffff8882a9ec0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f86f6df0000 CR3: 0000000113d64000 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: 0033:0x7fcbe2f90b0d 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:00007ffed4000b80 EFLAGS: 00000246 ORIG_RAX: 000000000000009d RAX: ffffffffffffffda RBX: 00007fcbe302cf80 RCX: 00007fcbe2f90b0d RDX: 00007ffed4000be0 RSI: 0000000000000002 RDI: 0000000000000016 RBP: 00007ffed4000bf0 R08: 0000000000000006 R09: 0000000000000071 R10: 0000000000000071 R11: 0000000000000246 R12: 000000000000006d R13: 00007ffed4001018 R14: 00007ffed4001298 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.