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Tue, 04 Aug 2026 07:05:36 -0700 (PDT) Date: Tue, 04 Aug 2026 07:05:36 -0700 In-Reply-To: <000000000000ac2392061f7a501b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a71f1b0.40259c87.584f4.04b8.GAE@google.com> Subject: Re: [syzbot] [mm?] kernel panic: System is deadlocked on memory (2) From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, rientjes@google.com, shakeel.butt@linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: 14ajwdpqfb5mimh3gqwpzsfgs19dsu61 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 4615520013 X-Rspam-User: X-HE-Tag: 1785852337-246277 X-HE-Meta: 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 LRL3uNWk 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 cHpl4jqA +6QfMyTe26rpVFBNpQPEmKB9r/6PpyINLrf6/07B6lyfrJ6GiOZYrChP/EDDrUACbP9Nawo+aVeuEw+ss/rKNENFCAz02cWbIPIH2wFxT3L5LI+DEP0n2xsP1ea+pJogwb6sogXlpFCd+E8yHygONuxJT3n0JN9v+VLlWVh6UWLT3qtrIC5JJMoC8zoBxnwIWZAoRwjg6zdwev9uWURU75yAvpsEgpCiFiumIyJSKsfsyyWS+F9NYw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: syzbot has found a reproducer for the following issue on: HEAD commit: 848acc8ffe1b Merge tag 'fsverity-for-linus' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1559b649580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=c61d6962d0b7e698439e compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1531be32580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15938bb9580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-848acc8f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6fb497cc0c8d/vmlinux-848acc8f.xz kernel image: https://storage.googleapis.com/syzbot-assets/663ccee34982/bzImage-848acc8f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c61d6962d0b7e698439e@syzkaller.appspotmail.com kmalloc-96 1483KB 1500KB kmem_cache_node 219KB 220KB kmem_cache 181KB 226KB Out of memory and no killable processes... Kernel panic - not syncing: System is deadlocked on memory CPU: 0 UID: 0 PID: 5149 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 vpanic+0x552/0x970 kernel/panic.c:651 panic+0xd1/0xe0 kernel/panic.c:788 out_of_memory.cold+0xa2/0x170 mm/oom_kill.c:1166 __alloc_pages_may_oom mm/page_alloc.c:4116 [inline] __alloc_pages_slowpath mm/page_alloc.c:4967 [inline] __alloc_frozen_pages_noprof+0x24c2/0x2dc0 mm/page_alloc.c:5317 alloc_pages_mpol+0x1fb/0x540 mm/mempolicy.c:2490 alloc_pages_noprof mm/mempolicy.c:2581 [inline] folio_alloc_noprof+0x22/0x250 mm/mempolicy.c:2591 filemap_alloc_folio_noprof.part.0+0x377/0x450 mm/filemap.c:1013 filemap_alloc_folio_noprof mm/filemap.c:2027 [inline] __filemap_get_folio_mpol+0x653/0x1320 mm/filemap.c:2012 __filemap_get_folio include/linux/pagemap.h:761 [inline] filemap_fault+0x879/0x3130 mm/filemap.c:3592 __do_fault+0x10b/0x440 mm/memory.c:5425 do_read_fault mm/memory.c:5860 [inline] do_fault+0xa99/0x1750 mm/memory.c:5994 do_pte_missing mm/memory.c:4566 [inline] handle_pte_fault mm/memory.c:6379 [inline] __handle_mm_fault+0x187d/0x2a00 mm/memory.c:6517 handle_mm_fault+0x37b/0xa30 mm/memory.c:6686 do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x7f72d08a7407 Code: Unable to access opcode bytes at 0x7f72d08a73dd. RSP: 002b:00007ffff9fa8a10 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00007f72d1003880 RCX: 00007f72d08a7407 RDX: 0000000000000008 RSI: 00007ffff9fa8b70 RDI: 000000000000000b RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000bb8 R11: 0000000000000202 R12: 0000000000000000 R13: 0000558259d38100 R14: 0000000000000001 R15: 00007ffff9fa8c60 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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.