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[syzbot] [net?] KMSAN: uninit-value in __vxlan_find_mac (2) | 0 (1) | 2025/04/08 14:28 |
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[syzbot] [net?] KMSAN: uninit-value in __vxlan_find_mac (2) | 0 (1) | 2025/04/08 14:28 |
===================================================== BUG: KMSAN: uninit-value in __vxlan_find_mac+0x49a/0x4f0 drivers/net/vxlan/vxlan_core.c:-1 __vxlan_find_mac+0x49a/0x4f0 drivers/net/vxlan/vxlan_core.c:-1 vxlan_find_mac drivers/net/vxlan/vxlan_core.c:437 [inline] vxlan_xmit+0x174c/0x3e40 drivers/net/vxlan/vxlan_core.c:2785 __netdev_start_xmit include/linux/netdevice.h:5201 [inline] netdev_start_xmit include/linux/netdevice.h:5210 [inline] xmit_one net/core/dev.c:3780 [inline] dev_hard_start_xmit+0x296/0xa40 net/core/dev.c:3796 __dev_queue_xmit+0x3679/0x57e0 net/core/dev.c:4633 dev_queue_xmit include/linux/netdevice.h:3350 [inline] __bpf_tx_skb net/core/filter.c:2135 [inline] __bpf_redirect_common net/core/filter.c:2179 [inline] __bpf_redirect+0x1514/0x1690 net/core/filter.c:2186 ____bpf_clone_redirect net/core/filter.c:2460 [inline] bpf_clone_redirect+0x37f/0x500 net/core/filter.c:2430 ___bpf_prog_run+0x12fd/0xf0b0 kernel/bpf/core.c:2018 __bpf_prog_run512+0xc5/0xf0 kernel/bpf/core.c:2313 bpf_dispatcher_nop_func include/linux/bpf.h:1316 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] bpf_test_run+0x546/0xd20 net/bpf/test_run.c:434 bpf_prog_test_run_skb+0x1906/0x25b0 net/bpf/test_run.c:1093 bpf_prog_test_run+0x5e5/0xa30 kernel/bpf/syscall.c:4427 __sys_bpf+0x6ce/0xdf0 kernel/bpf/syscall.c:5852 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5939 ia32_sys_call+0x2126/0x41f0 arch/x86/include/generated/asm/syscalls_32.h:358 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Uninit was created at: slab_post_alloc_hook mm/slub.c:4157 [inline] slab_alloc_node mm/slub.c:4200 [inline] kmem_cache_alloc_node_noprof+0x921/0xe10 mm/slub.c:4252 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:577 pskb_expand_head+0x21f/0x1c10 net/core/skbuff.c:2247 skb_ensure_writable+0x496/0x520 net/core/skbuff.c:6241 __bpf_try_make_writable net/core/filter.c:1665 [inline] bpf_try_make_writable net/core/filter.c:1671 [inline] bpf_try_make_head_writable net/core/filter.c:1679 [inline] ____bpf_clone_redirect net/core/filter.c:2454 [inline] bpf_clone_redirect+0x1c5/0x500 net/core/filter.c:2430 ___bpf_prog_run+0x12fd/0xf0b0 kernel/bpf/core.c:2018 __bpf_prog_run512+0xc5/0xf0 kernel/bpf/core.c:2313 bpf_dispatcher_nop_func include/linux/bpf.h:1316 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] bpf_test_run+0x546/0xd20 net/bpf/test_run.c:434 bpf_prog_test_run_skb+0x1906/0x25b0 net/bpf/test_run.c:1093 bpf_prog_test_run+0x5e5/0xa30 kernel/bpf/syscall.c:4427 __sys_bpf+0x6ce/0xdf0 kernel/bpf/syscall.c:5852 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5939 ia32_sys_call+0x2126/0x41f0 arch/x86/include/generated/asm/syscalls_32.h:358 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369 entry_SYSENTER_compat_after_hwframe+0x84/0x8e CPU: 0 UID: 0 PID: 9482 Comm: syz.5.941 Not tainted 6.14.0-syzkaller-12508-g92b71befc349 #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 =====================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/04/03 12:29 | upstream | 92b71befc349 | 996a9618 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kmsan-gce-386-root | KMSAN: uninit-value in __vxlan_find_mac |