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Sun, 03 May 2026 04:47:26 -0700 (PDT) Date: Sun, 03 May 2026 04:47:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69f735ce.050a0220.312cd3.0031.GAE@google.com> Subject: [syzbot] [mm?] BUG: sleeping function called from invalid context in vma_alloc_folio_noprof (2) From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, shakeel.butt@linux.dev, surenb@google.com, syzkaller-bugs@googlegroups.com, vbabka@kernel.org Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 7E37080009 X-Stat-Signature: 9saofzzzub9e9tq7xp5sa7wn5n9na4tx X-HE-Tag: 1777808847-483370 X-HE-Meta: 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 CjumTcHQ 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 f87j2sc4 8QjuR6r4YfTfsZ0cYYj79BSDlTdkW7bLEUB01u0XJzbe/ETsCokt1HeAY54MXRleWUJER+7c2PmVHMQ9140y8BmhYIIYiUyMeWxQaGIaJ/g5t8jya/3okI6UTbvZOejPh5ejDqWlqqFsQ4q62dbSQfkBxRTvn/+klBQ1jrYfm7lTjUBNk8Jb4Czz9Z2SlLbUdPG4YRspthG2QnZjCa19y5b20fEzVehnTrlprHcS/iN1S5pHLqwprWiNigobpfeGQ26XSZ2glENdxJy33TjPRmU5irtycu23NmMgr9c3frxbvneEJSr6SoNNXtDmaUx1CHbM+McwPKfUhkd4MbUlAHJ7r/gh8rIl0lqfSubY2qpphnlkgjNYd2tJUaKFYFP8enj2vfOgkKlZ5hjq2cNKKnbJOA8RgFxMWQdk6sc+TVCpUOIoreZfmDBtssIhFVkMx2FyaQB/N7Yy/bXm62dOGsXGSeAmB5/X Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: dca922e019dd Merge tag 'xsa48x-7.1-tag' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=100242ce580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d0f0911eedbc130a dashboard link: https://syzkaller.appspot.com/bug?extid=a21650c1666eae7b2aae compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-dca922e0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1e719cb224ff/vmlinux-dca922e0.xz kernel image: https://storage.googleapis.com/syzbot-assets/79a541b03a9e/bzImage-dca922e0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a21650c1666eae7b2aae@syzkaller.appspotmail.com BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:323 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5665, name: dhcpcd-run-hook preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 2 locks held by dhcpcd-run-hook/5665: #0: ffff8880243d01c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x11d/0x590 mm/mmap_lock.c:310 #1: ffffffff8e7e52e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #1: ffffffff8e7e52e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #1: ffffffff8e7e52e0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290 CPU: 0 UID: 0 PID: 5665 Comm: dhcpcd-run-hook 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 __might_resched.cold+0x1ec/0x232 kernel/sched/core.c:9162 might_alloc include/linux/sched/mm.h:323 [inline] prepare_alloc_pages+0x44a/0x5f0 mm/page_alloc.c:4995 __alloc_frozen_pages_noprof+0x19a/0x2bc0 mm/page_alloc.c:5215 alloc_pages_mpol+0x1fb/0x540 mm/mempolicy.c:2490 folio_alloc_mpol_noprof+0x36/0x260 mm/mempolicy.c:2509 vma_alloc_folio_noprof+0xed/0x1d0 mm/mempolicy.c:2544 folio_prealloc mm/memory.c:1193 [inline] wp_page_copy mm/memory.c:3859 [inline] do_wp_page+0x1ee1/0x4350 mm/memory.c:4320 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault+0x1ab6/0x2a00 mm/memory.c:6549 handle_mm_fault+0x36d/0xa20 mm/memory.c:6718 do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f5a6f60980e Code: df e8 d7 c4 ff ff 48 8d 3d 9c 92 05 00 31 c0 e8 e1 ca ff ff 95 75 24 48 8d 05 5e 9c 07 00 44 89 f2 4c 89 e6 48 89 df 48 8b 00 <83> a0 f8 02 00 00 00 e8 de eb ff ff e9 a8 00 00 00 48 85 db 0f 84 RSP: 002b:00007ffc0b5c63f0 EFLAGS: 00010246 RAX: 000055c4ea134910 RBX: 000055c4ea135c60 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 000055c4ea138c30 RDI: 000055c4ea135c60 RBP: 0000000000000000 R08: 00007f5a6f5b4b60 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 000055c4ea138c30 R13: 000055c4ea135c60 R14: 0000000000000000 R15: 0000000000000000 ================================================ WARNING: lock held when returning to user space! syzkaller #0 Tainted: G W ------------------------------------------------ dhcpcd-run-hook/5665 is leaving the kernel with locks still held! 1 lock held by dhcpcd-run-hook/5665: #0: ffffffff8e7e52e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8e7e52e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e7e52e0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup