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AFNElJ9cHLSoL4r6kHZlORiGaT5ltHShwrJQobwk9zduz+E3lUwyBzE0q6WY5CgU14VBeJjBC4isABH1nRPeEpY=@vger.kernel.org X-Gm-Message-State: AOJu0Yz6PcXyEFEbElh4/2QHcck2hxWQ+XEgPbuI9Rt2Y1KNeyDDMVDC MoxN//iqZ9wj6wciK+/b39d/qGRjZ6lSxsiw4ylRU1PPhPvczN/0Q9PGabUJ0YQ/7DEgXOELAMq ITmyKPKYWeDgACZRlKfFfEZTI21YyiluOXYHzQJjwy1f4bjg0N0vcE+VVprc= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1c1a:b0:681:e389:f818 with SMTP id 006d021491bc7-68a6a5b9e1dmr8322757eaf.20.1776226201786; Tue, 14 Apr 2026 21:10:01 -0700 (PDT) Date: Tue, 14 Apr 2026 21:10:01 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69df0f99.a00a0220.468cb.0070.GAE@google.com> Subject: Re: [syzbot] [hfs?] KMSAN: uninit-value in hfsplus_bnode_find From: syzbot To: eadavis@qq.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KMSAN: uninit-value in irqentry_exit_to_kernel_mode_preempt ===================================================== BUG: KMSAN: uninit-value in irqentry_exit_to_kernel_mode_preempt+0xe3/0x120 include/linux/irq-entry-common.h:472 irqentry_exit_to_kernel_mode_preempt+0xe3/0x120 include/linux/irq-entry-common.h:472 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline] irqentry_exit+0x77/0x710 kernel/entry/common.c:164 sysvec_apic_timer_interrupt+0x52/0x90 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:697 smap_save mm/kmsan/instrumentation.c:93 [inline] get_shadow_origin_ptr mm/kmsan/instrumentation.c:35 [inline] __msan_metadata_ptr_for_load_4+0x11/0x40 mm/kmsan/instrumentation.c:93 do_csum lib/checksum.c:64 [inline] ip_fast_csum+0x1e6/0x3f0 lib/checksum.c:99 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:842 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline] nsim_dev_trap_report_work+0x8c0/0x1430 drivers/net/netdevsim/dev.c:922 process_one_work kernel/workqueue.c:3288 [inline] process_scheduled_works+0xb65/0x1e40 kernel/workqueue.c:3371 worker_thread+0xee4/0x1590 kernel/workqueue.c:3452 kthread+0x53f/0x600 kernel/kthread.c:436 ret_from_fork+0x20f/0x8d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was created at: slab_post_alloc_hook mm/slub.c:4545 [inline] slab_alloc_node mm/slub.c:4866 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_node_track_caller_noprof+0x4f6/0x1750 mm/slub.c:5368 kmalloc_reserve net/core/skbuff.c:635 [inline] __alloc_skb+0x90d/0x1190 net/core/skbuff.c:713 alloc_skb include/linux/skbuff.h:1383 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:819 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline] nsim_dev_trap_report_work+0x3f2/0x1430 drivers/net/netdevsim/dev.c:922 process_one_work kernel/workqueue.c:3288 [inline] process_scheduled_works+0xb65/0x1e40 kernel/workqueue.c:3371 worker_thread+0xee4/0x1590 kernel/workqueue.c:3452 kthread+0x53f/0x600 kernel/kthread.c:436 ret_from_fork+0x20f/0x8d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 CPU: 0 UID: 0 PID: 134 Comm: kworker/u8:6 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events_unbound nsim_dev_trap_report_work ===================================================== Tested on: commit: 91a4855d Merge tag 'net-next-7.1' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14f418ce580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9f67daa5723e634c dashboard link: https://syzkaller.appspot.com/bug?extid=217eb327242d08197efb compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=170efb02580000