syzbot


upstream test error: KMSAN: uninit-value in receive_buf

Status: upstream: reported on 2024/05/25 16:12
Subsystems: virt net
[Documentation on labels]
Reported-by: syzbot+799fbb6d9e02a7a1d62b@syzkaller.appspotmail.com
Fix commit: virtio_ring: fix KMSAN error for premapped mode
Patched on: [], missing on: [ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-net-next-test-gce ci2-upstream-usb]
First crash: 35d, last: 10h16m
Discussions (1)
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[syzbot] [net?] [virt?] upstream test error: KMSAN: uninit-value in receive_buf 3 (4) 2024/06/18 02:56

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in receive_mergeable drivers/net/virtio_net.c:1847 [inline]
BUG: KMSAN: uninit-value in receive_buf+0x2620/0x6070 drivers/net/virtio_net.c:1973
 receive_mergeable drivers/net/virtio_net.c:1847 [inline]
 receive_buf+0x2620/0x6070 drivers/net/virtio_net.c:1973
 virtnet_receive drivers/net/virtio_net.c:2277 [inline]
 virtnet_poll+0xd1c/0x23c0 drivers/net/virtio_net.c:2380
 __napi_poll+0xe7/0x980 net/core/dev.c:6722
 napi_poll net/core/dev.c:6791 [inline]
 net_rx_action+0x82a/0x1850 net/core/dev.c:6907
 handle_softirqs+0x1ce/0x800 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0x68/0x120 kernel/softirq.c:637
 irq_exit_rcu+0x12/0x20 kernel/softirq.c:649
 common_interrupt+0x94/0xa0 arch/x86/kernel/irq.c:278
 asm_common_interrupt+0x2b/0x40 arch/x86/include/asm/idtentry.h:693
 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
 acpi_safe_halt+0x25/0x30 drivers/acpi/processor_idle.c:112
 acpi_idle_do_entry+0x22/0x40 drivers/acpi/processor_idle.c:573
 acpi_idle_enter+0xa1/0xc0 drivers/acpi/processor_idle.c:707
 cpuidle_enter_state+0xcb/0x250 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x7f/0xf0 drivers/cpuidle/cpuidle.c:388
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x551/0x750 kernel/sched/idle.c:332
 cpu_startup_entry+0x65/0x80 kernel/sched/idle.c:430
 rest_init+0x1e8/0x260 init/main.c:747
 start_kernel+0x92c/0xa70 init/main.c:1103
 x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:507
 x86_64_start_kernel+0x98/0xa0 arch/x86/kernel/head64.c:488
 common_startup_64+0x12c/0x137

Uninit was created at:
 __alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4701
 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265
 alloc_pages_noprof+0x1bf/0x1e0 mm/mempolicy.c:2336
 skb_page_frag_refill+0x2bf/0x7c0 net/core/sock.c:2920
 virtnet_rq_alloc+0x43/0xbb0 drivers/net/virtio_net.c:882
 add_recvbuf_mergeable drivers/net/virtio_net.c:2128 [inline]
 try_fill_recv+0x3f0/0x2f50 drivers/net/virtio_net.c:2173
 virtnet_open+0x1cc/0xb00 drivers/net/virtio_net.c:2452
 __dev_open+0x546/0x6f0 net/core/dev.c:1472
 __dev_change_flags+0x309/0x9a0 net/core/dev.c:8781
 dev_change_flags+0x8e/0x1d0 net/core/dev.c:8853
 devinet_ioctl+0x13ec/0x22c0 net/ipv4/devinet.c:1177
 inet_ioctl+0x4bd/0x6d0 net/ipv4/af_inet.c:1003
 sock_do_ioctl+0xb7/0x540 net/socket.c:1222
 sock_ioctl+0x727/0xd70 net/socket.c:1341
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x261/0x450 fs/ioctl.c:893
 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:893
 x64_sys_call+0x18c0/0x3b90 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
=====================================================

Crashes (183):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/25 15:46 upstream 55027e689933 da0bd5ca .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/24 23:22 upstream 55027e689933 215eef4a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/24 19:46 upstream 626737a5791b 215eef4a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/24 15:36 upstream 626737a5791b edc5149a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/23 22:15 upstream f2661062f16b edc5149a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/23 16:15 upstream 7c16f0a4ed1c edc5149a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/22 23:50 upstream 5f583a3162ff edc5149a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/22 22:04 upstream 2765de94dd38 edc5149a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/22 18:05 upstream 563a50672d8a edc5149a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/22 16:20 upstream da3b6ef17658 edc5149a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/22 02:02 upstream 35bb670d65fc edc5149a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/21 23:42 upstream 4545981f33be edc5149a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/21 20:37 upstream 66cc544fd75c dac2aa43 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/20 22:06 upstream 50736169ecc8 dac2aa43 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/20 17:02 upstream e5b3efbe1ab1 dac2aa43 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/19 19:43 upstream e5b3efbe1ab1 41b7e219 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/19 05:36 upstream 92e5605a199e 41b7e219 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/18 22:45 upstream 46d1907d1caa 639d6cdf .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/18 16:16 upstream 14d7c92f8df9 639d6cdf .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/17 16:46 upstream 6ba59ff42279 1f11cfd7 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/17 03:36 upstream 6ba59ff42279 f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/16 22:34 upstream b5beaa44747b f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/16 00:09 upstream a3e18a540541 f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/15 19:28 upstream 08a6b55aa0c6 f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/15 09:06 upstream 44ef20baed8e f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/05/25 04:11 upstream 56fb6f92854f a10a183e .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/24 22:40 upstream 55027e689933 215eef4a .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/21 18:55 upstream 66cc544fd75c dac2aa43 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/20 20:38 upstream 50736169ecc8 dac2aa43 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/20 15:14 upstream e5b3efbe1ab1 dac2aa43 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/19 18:29 upstream e5b3efbe1ab1 41b7e219 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/19 03:01 upstream 92e5605a199e 639d6cdf .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/18 20:32 upstream 46d1907d1caa 639d6cdf .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/18 13:10 upstream 14d7c92f8df9 639d6cdf .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/18 11:49 upstream 14d7c92f8df9 ce6011bc .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/18 05:09 upstream 14d7c92f8df9 1f11cfd7 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/17 23:01 upstream 6226e74900d7 1f11cfd7 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/17 17:53 upstream 6ba59ff42279 1f11cfd7 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/17 04:54 upstream 6ba59ff42279 f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/17 00:03 upstream 6456c4256d1c f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/16 19:16 upstream b5beaa44747b f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/16 03:20 upstream a3e18a540541 f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/15 22:15 upstream 08a6b55aa0c6 f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/15 10:13 upstream 44ef20baed8e f429ab00 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/06/15 07:14 upstream 44ef20baed8e 8d849073 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
2024/05/21 16:06 upstream 8f6a15f095a6 1014eca7 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: uninit-value in receive_buf
* Struck through repros no longer work on HEAD.