Message-ID: <67037085.050a0220.49194.04fa.GAE@google.com>
Date: Sun, 06 Oct 2024 22:24:21 -0700
From: syzbot <syzbot+b2f95ad40a2119295cc1@...kaller.appspotmail.com>
To: 42.hyeyoo@...il.com, akpm@...ux-foundation.org, andrii@...nel.org, 
	ast@...nel.org, bpf@...r.kernel.org, cl@...ux.com, daniel@...earbox.net, 
	eddyz87@...il.com, feng.tang@...el.com, haoluo@...gle.com, 
	iamjoonsoo.kim@....com, john.fastabend@...il.com, jolsa@...nel.org, 
	kpsingh@...nel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	martin.lau@...ux.dev, penberg@...nel.org, rientjes@...gle.com, 
	roman.gushchin@...ux.dev, sdf@...ichev.me, song@...nel.org, 
	syzkaller-bugs@...glegroups.com, vbabka@...e.cz, yonghong.song@...ux.dev
Subject: [syzbot] [bpf?] WARNING in acquire_reference_state

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@...el.com>
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@...kaller.appspotmail.com
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.
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If the report is already addressed, let syzbot know by replying with:
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