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Sun, 07 Dec 2025 23:41:30 -0800 (PST) Date: Sun, 07 Dec 2025 23:41:30 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6936812a.a70a0220.38f243.0090.GAE@google.com> Subject: [syzbot] [mm?] BUG: sleeping function called from invalid context in kvm_mmu_notifier_invalidate_range_start 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-Rspam-User: X-Stat-Signature: 4cyfhxn6hd3i7o8f9np9i33ej9oe3mfj X-Rspamd-Queue-Id: 3BA171C0008 X-Rspamd-Server: rspam06 X-HE-Tag: 1765179691-472606 X-HE-Meta: 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 qQr0QgIV 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 kAIv9zTV 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 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: Hello, syzbot found the following issue on: HEAD commit: 37bb2e7217b0 Merge tag 'staging-6.19-rc1' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=159b2992580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8750900a7c493a0b dashboard link: https://syzkaller.appspot.com/bug?extid=c3178b6b512446632bac compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/461486e4058d/disk-37bb2e72.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/844c0aeb98b9/vmlinux-37bb2e72.xz kernel image: https://storage.googleapis.com/syzbot-assets/20fb43a5a012/bzImage-37bb2e72.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c3178b6b512446632bac@syzkaller.appspotmail.com BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 in_atomic(): 0, irqs_disabled(): 0, non_block: 1, pid: 39, name: oom_reaper preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 4 locks held by oom_reaper/39: #0: ffff888030a29070 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:410 [inline] #0: ffff888030a29070 (&mm->mmap_lock){++++}-{4:4}, at: oom_reap_task_mm mm/oom_kill.c:582 [inline] #0: ffff888030a29070 (&mm->mmap_lock){++++}-{4:4}, at: oom_reap_task mm/oom_kill.c:625 [inline] #0: ffff888030a29070 (&mm->mmap_lock){++++}-{4:4}, at: oom_reaper+0x27e/0xa90 mm/oom_kill.c:666 #1: ffffffff8d6ce600 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}, at: mmu_notifier_invalidate_range_start_nonblock include/linux/mmu_notifier.h:456 [inline] #1: ffffffff8d6ce600 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}, at: __oom_reap_task_mm+0x268/0x490 mm/oom_kill.c:558 #2: ffffffff8d6ce658 (srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:185 [inline] #2: ffffffff8d6ce658 (srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:277 [inline] #2: ffffffff8d6ce658 (srcu){.+.+}-{0:0}, at: mn_hlist_invalidate_range_start mm/mmu_notifier.c:468 [inline] #2: ffffffff8d6ce658 (srcu){.+.+}-{0:0}, at: __mmu_notifier_invalidate_range_start+0x30b/0x840 mm/mmu_notifier.c:533 #3: ffff8880276bcaf8 (&kvm->mn_invalidate_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:44 [inline] #3: ffff8880276bcaf8 (&kvm->mn_invalidate_lock){+.+.}-{3:3}, at: kvm_mmu_notifier_invalidate_range_start+0x1bd/0xae0 virt/kvm/kvm_main.c:750 CPU: 1 UID: 0 PID: 39 Comm: oom_reaper Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 __might_resched+0x44b/0x5d0 kernel/sched/core.c:8827 __rt_spin_lock kernel/locking/spinlock_rt.c:48 [inline] rt_spin_lock+0xc7/0x3e0 kernel/locking/spinlock_rt.c:57 spin_lock include/linux/spinlock_rt.h:44 [inline] kvm_mmu_notifier_invalidate_range_start+0x1bd/0xae0 virt/kvm/kvm_main.c:750 mn_hlist_invalidate_range_start mm/mmu_notifier.c:478 [inline] __mmu_notifier_invalidate_range_start+0x440/0x840 mm/mmu_notifier.c:533 mmu_notifier_invalidate_range_start_nonblock include/linux/mmu_notifier.h:459 [inline] __oom_reap_task_mm+0x2cb/0x490 mm/oom_kill.c:558 oom_reap_task_mm mm/oom_kill.c:601 [inline] oom_reap_task mm/oom_kill.c:625 [inline] oom_reaper+0x3aa/0xa90 mm/oom_kill.c:666 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 oom_reaper: reaped process 20496 (syz.8.2014), now anon-rss:24kB, file-rss:21692kB, shmem-rss:128kB --- 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