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hannes@cmpxchg.org, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, muchun.song@linux.dev, oliver.sang@intel.com, qi.zheng@linux.dev, roman.gushchin@linux.dev, shakeel.butt@linux.dev Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: B4E281C0007 X-Stat-Signature: jsuheurs4u6eejpsbb9wb3hyr5i6g5qe X-Rspam-User: X-HE-Tag: 1778914714-212652 X-HE-Meta: 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 NaXr56a3 MGYiD+4rrXWINIp6e7mkECcHOR3SilHqFwkg+Aj4clXw90Nd1NOkmw== 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] memcg: cache obj_stock by memcg, not by objcg pointer https://lore.kernel.org/all/20260515171953.2224503-1-shakeel.butt@linux.dev * [PATCH] memcg: cache obj_stock by memcg, not by objcg pointer and found the following issue: WARNING in __refill_obj_stock Full report is available here: https://ci.syzbot.org/series/8efc6e46-4b2e-43ab-90a0-62552bdc14a6 *** WARNING in __refill_obj_stock tree: mm-new URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git base: 0cec77cfd5314c0b3b03530abe1a4b32e991f639 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/fda0a69d-af56-4b9f-8b30-b63ea4756923/config ------------[ cut here ]------------ debug_locks && !(rcu_read_lock_held() || lock_is_held(&(&cgroup_mutex)->dep_map)) WARNING: ./include/linux/memcontrol.h:380 at __refill_obj_stock+0x4fd/0x610, CPU#0: syz.1.48/5712 Modules linked in: CPU: 0 UID: 0 PID: 5712 Comm: syz.1.48 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:__refill_obj_stock+0x4fd/0x610 Code: 89 e7 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 d8 ba 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 <0f> 0b 90 e9 a8 fb ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 60 RSP: 0018:ffffc9000483f4b0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88810beb0f80 RCX: 0000000080000001 RDX: 0000000000000110 RSI: ffffffff8e21e93e RDI: ffffffff8c28b8e0 RBP: 0000000000000001 R08: ffffffff8239a83c R09: ffff88812103c600 R10: dffffc0000000000 R11: ffffed102d89bae9 R12: 1ffff110242078c8 R13: ffff88810beb0d80 R14: dffffc0000000000 R15: ffff88812103c600 FS: 0000000000000000(0000) GS:ffff88818dc89000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f80ad948060 CR3: 000000000e74a000 CR4: 00000000000006f0 Call Trace: __memcg_slab_free_hook+0x2ed/0x4b0 kmem_cache_free+0x381/0x650 __put_anon_vma+0x12b/0x2d0 unlink_anon_vmas+0x58b/0x730 free_pgtables+0x802/0xb40 exit_mmap+0x490/0x9e0 __mmput+0x118/0x430 exit_mm+0x18e/0x250 do_exit+0x6a2/0x22c0 do_group_exit+0x21b/0x2d0 get_signal+0x1284/0x1330 arch_do_signal_or_restart+0xbc/0x840 exit_to_user_mode_loop+0x8c/0x4d0 do_syscall_64+0x33e/0xf80 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6eea99ce59 Code: Unable to access opcode bytes at 0x7f6eea99ce2f. RSP: 002b:00007f6eeb8240e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f6eeac15fa8 RCX: 00007f6eea99ce59 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f6eeac15fac RBP: 00007f6eeac15fa0 R08: 3fffffffffffffff R09: 0000000000000000 R10: 0000200001000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6eeac16038 R14: 00007fffdc60cea0 R15: 00007fffdc60cf88 *** 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. To test a patch for this bug, please reply with `#syz test` (should be on a separate line). The patch should be attached to the email. Note: arguments like custom git repos and branches are not supported.