syzbot


KCSAN: data-race in virtqueue_disable_cb / vring_interrupt (2)

Status: moderation: reported on 2023/12/11 00:04
Subsystems: virt
[Documentation on labels]
Reported-by: syzbot+684fce18097cf19cff5e@syzkaller.appspotmail.com
First crash: 207d, last: 23d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in virtqueue_disable_cb / vring_interrupt virt 130 293d 781d 0/28 auto-obsoleted due to no activity on 2023/09/29 09:42

Sample crash report:
==================================================================
BUG: KCSAN: data-race in virtqueue_disable_cb / vring_interrupt

write to 0xffff888102a8c352 of 1 bytes by interrupt on cpu 1:
 vring_interrupt+0x12b/0x180 drivers/virtio/virtio_ring.c:2591
 __handle_irq_event_percpu+0x95/0x490 kernel/irq/handle.c:158
 handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
 handle_irq_event+0x64/0xf0 kernel/irq/handle.c:210
 handle_edge_irq+0x16d/0x5b0 kernel/irq/chip.c:831
 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
 handle_irq arch/x86/kernel/irq.c:247 [inline]
 call_irq_handler arch/x86/kernel/irq.c:259 [inline]
 __common_interrupt+0x58/0xe0 arch/x86/kernel/irq.c:285
 common_interrupt+0x7c/0x90 arch/x86/kernel/irq.c:278
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
 finish_task_switch+0xbf/0x2b0 kernel/sched/core.c:5282
 context_switch kernel/sched/core.c:5411 [inline]
 __schedule+0x5e8/0x940 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x55/0xc0 kernel/sched/core.c:6837
 worker_thread+0x5fc/0x730 kernel/workqueue.c:3408
 kthread+0x1d1/0x210 kernel/kthread.c:389
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read to 0xffff888102a8c352 of 1 bytes by task 3087 on cpu 0:
 virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:892 [inline]
 virtqueue_disable_cb+0x92/0x180 drivers/virtio/virtio_ring.c:2446
 start_xmit+0x125/0xb70 drivers/net/virtio_net.c:2568
 __netdev_start_xmit include/linux/netdevice.h:4882 [inline]
 netdev_start_xmit include/linux/netdevice.h:4896 [inline]
 xmit_one net/core/dev.c:3578 [inline]
 dev_hard_start_xmit+0x119/0x3f0 net/core/dev.c:3594
 sch_direct_xmit+0x1b0/0x580 net/sched/sch_generic.c:343
 __dev_xmit_skb net/core/dev.c:3807 [inline]
 __dev_queue_xmit+0xee7/0x1e50 net/core/dev.c:4359
 dev_queue_xmit include/linux/netdevice.h:3095 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip_finish_output2+0x73b/0x8b0 net/ipv4/ip_output.c:235
 ip_finish_output+0x11a/0x2a0 net/ipv4/ip_output.c:323
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip_output+0xab/0x170 net/ipv4/ip_output.c:433
 dst_output include/net/dst.h:450 [inline]
 ip_local_out net/ipv4/ip_output.c:129 [inline]
 __ip_queue_xmit+0xbca/0xbf0 net/ipv4/ip_output.c:535
 ip_queue_xmit+0x38/0x50 net/ipv4/ip_output.c:549
 __tcp_transmit_skb+0x15b0/0x1970 net/ipv4/tcp_output.c:1466
 tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
 tcp_write_xmit+0x1273/0x31c0 net/ipv4/tcp_output.c:2829
 tcp_push_one+0x7d/0xa0 net/ipv4/tcp_output.c:3028
 tcp_sendmsg_locked+0x1a21/0x26d0 net/ipv4/tcp.c:1296
 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1348
 inet_sendmsg+0x77/0xd0 net/ipv4/af_inet.c:851
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x102/0x180 net/socket.c:745
 sock_write_iter+0x164/0x1b0 net/socket.c:1160
 call_write_iter include/linux/fs.h:2114 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x78f/0x900 fs/read_write.c:590
 ksys_write+0xeb/0x1b0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:652
 x64_sys_call+0x27b7/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00 -> 0x01

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3087 Comm: syz-fuzzer Not tainted 6.9.0-syzkaller-10713-g2a8120d7b482 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
==================================================================

Crashes (25):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/22 00:25 upstream 2a8120d7b482 1014eca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/05/19 05:16 upstream 0450d2083be6 c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/05/16 19:40 upstream 3c999d1ae3c7 c2e07261 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/05/14 03:24 upstream 8815da98e06a fdb4c10c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/05/10 14:37 upstream 448b3fe5a0ea f7c35481 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/05/08 15:46 upstream dccb07f2914c 20bf80e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/05/06 11:15 upstream dd5a440a31fa d884b519 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/05/05 01:30 upstream 7367539ad4b0 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/05/03 14:33 upstream f03359bca01b dd26401e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/05/02 20:57 upstream 49a73b1652c5 ddfc15a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/04/23 09:23 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/04/22 10:14 upstream ed30a4a51bb1 36c961ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/04/20 21:08 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/04/07 15:22 upstream f2f80ac80987 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/04/06 04:24 upstream 104db052b62d ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/04/05 14:45 upstream 8cb4a9a82b21 77230c29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/04/05 01:56 upstream c88b9b4cde17 0ee3535e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/04/04 17:29 upstream c85af715cac0 0ee3535e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/03/28 08:28 upstream 8d025e2092e2 120789fd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/03/01 05:04 upstream 87adedeba51a 352ab904 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/02/04 16:33 upstream 54be6c6c5ae8 a67b2c42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2024/01/08 00:43 upstream 0dd3ee311255 d0304e9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2023/12/12 01:19 upstream 26aff849438c 28b24332 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2023/11/30 01:54 upstream 3b47bc037bd4 f819d6f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
2023/11/19 23:47 upstream eb3479bc23fa cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in virtqueue_disable_cb / vring_interrupt
* Struck through repros no longer work on HEAD.