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Message-ID: <000000000000d830f0061f503c6a@google.com> Date: Sat, 10 Aug 2024 01:42:18 -0700 From: syzbot <syzbot+98afa303be379af6cdb2@...kaller.appspotmail.com> To: kvalo@...nel.org, linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com, toke@...e.dk Subject: [syzbot] [wireless?] KMSAN: uninit-value in skb_trim (2) Hello, syzbot found the following issue on: HEAD commit: b446a2dae984 Merge tag 'linux_kselftest-fixes-6.11-rc3' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13eb467d980000 kernel config: https://syzkaller.appspot.com/x/.config?x=305509ad8eb5f9b8 dashboard link: https://syzkaller.appspot.com/bug?extid=98afa303be379af6cdb2 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/49d96e53e1c4/disk-b446a2da.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f05350d128a7/vmlinux-b446a2da.xz kernel image: https://storage.googleapis.com/syzbot-assets/805c7d86a2db/bzImage-b446a2da.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+98afa303be379af6cdb2@...kaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in skb_trim+0x13a/0x190 net/core/skbuff.c:2673 skb_trim+0x13a/0x190 net/core/skbuff.c:2673 ath9k_hif_usb_reg_in_cb+0x582/0x970 drivers/net/wireless/ath/ath9k/hif_usb.c:758 __usb_hcd_giveback_urb+0x572/0x840 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x157/0x720 drivers/usb/core/hcd.c:1734 dummy_timer+0xd3f/0x6aa0 drivers/usb/gadget/udc/dummy_hcd.c:1987 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x564/0xe40 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x3ab/0x1490 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0xa6/0x3a0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x7e/0x90 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 __nr_to_section include/linux/mmzone.h:1862 [inline] __pfn_to_section include/linux/mmzone.h:1970 [inline] pfn_valid include/linux/mmzone.h:2023 [inline] kmsan_virt_addr_valid arch/x86/include/asm/kmsan.h:94 [inline] virt_to_page_or_null+0x7a/0x150 mm/kmsan/shadow.c:75 kmsan_get_metadata+0x13e/0x1c0 mm/kmsan/shadow.c:141 kmsan_get_shadow_origin_ptr+0x38/0xb0 mm/kmsan/shadow.c:97 get_shadow_origin_ptr mm/kmsan/instrumentation.c:38 [inline] __msan_metadata_ptr_for_load_4+0x24/0x40 mm/kmsan/instrumentation.c:93 stack_trace_consume_entry+0x16f/0x1e0 kernel/stacktrace.c:94 arch_stack_walk+0x1ca/0x2d0 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0xaa/0xe0 kernel/stacktrace.c:122 kmsan_save_stack_with_flags mm/kmsan/core.c:73 [inline] kmsan_internal_poison_memory+0x49/0x90 mm/kmsan/core.c:57 kmsan_slab_alloc+0xdf/0x160 mm/kmsan/hooks.c:66 slab_post_alloc_hook mm/slub.c:3994 [inline] slab_alloc_node mm/slub.c:4037 [inline] __do_kmalloc_node mm/slub.c:4157 [inline] __kmalloc_node_track_caller_noprof+0x6c7/0xf90 mm/slub.c:4177 kmalloc_reserve+0x23e/0x4a0 net/core/skbuff.c:605 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:674 alloc_skb include/linux/skbuff.h:1320 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] nsim_dev_trap_report_work+0x3f5/0x1230 drivers/net/netdevsim/dev.c:850 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea5/0x1520 kernel/workqueue.c:3390 kthread+0x3dd/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was created at: __alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4723 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page mm/slub.c:2321 [inline] allocate_slab+0x203/0x1220 mm/slub.c:2484 new_slab mm/slub.c:2537 [inline] ___slab_alloc+0x12ef/0x35e0 mm/slub.c:3723 __slab_alloc mm/slub.c:3813 [inline] __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] kmem_cache_alloc_noprof+0x57a/0xb20 mm/slub.c:4044 skb_clone+0x303/0x550 net/core/skbuff.c:2071 deliver_clone net/bridge/br_forward.c:125 [inline] maybe_deliver+0x3ad/0x590 net/bridge/br_forward.c:190 br_flood+0x574/0xbd0 net/bridge/br_forward.c:236 br_dev_xmit+0x1bfa/0x1f10 __netdev_start_xmit include/linux/netdevice.h:4913 [inline] netdev_start_xmit include/linux/netdevice.h:4922 [inline] xmit_one net/core/dev.c:3580 [inline] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3596 __dev_queue_xmit+0x358c/0x5610 net/core/dev.c:4423 dev_queue_xmit include/linux/netdevice.h:3105 [inline] neigh_resolve_output+0x9ca/0xae0 net/core/neighbour.c:1565 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0x233e/0x2ba0 net/ipv6/ip6_output.c:137 __ip6_finish_output net/ipv6/ip6_output.c:211 [inline] ip6_finish_output+0xbb8/0x14b0 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x356/0x620 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xb9f/0x14c0 net/ipv6/ndisc.c:511 ndisc_send_rs+0x97b/0xae0 net/ipv6/ndisc.c:721 addrconf_rs_timer+0x488/0x6f0 net/ipv6/addrconf.c:4040 call_timer_fn+0x49/0x580 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x84e/0xe90 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0x3a/0x70 kernel/time/timer.c:2447 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 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x83/0x90 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 CPU: 1 UID: 0 PID: 5253 Comm: kworker/1:6 Not tainted 6.11.0-rc2-syzkaller-00004-gb446a2dae984 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: events nsim_dev_trap_report_work ===================================================== --- 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@...glegroups.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
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