batman_adv: batadv0: Interface activated: batadv_slave_1 ===================================================== BUG: KMSAN: uninit-value in br_dev_xmit+0x5eb/0x1960 net/bridge/br_device.c:64 br_dev_xmit+0x5eb/0x1960 net/bridge/br_device.c:64 __netdev_start_xmit include/linux/netdevice.h:4819 [inline] netdev_start_xmit include/linux/netdevice.h:4833 [inline] xmit_one+0x14e/0x5f0 net/core/dev.c:3590 dev_hard_start_xmit+0xe5/0x370 net/core/dev.c:3606 __dev_queue_xmit+0x1dec/0x31f0 net/core/dev.c:4256 dev_queue_xmit include/linux/netdevice.h:3008 [inline] __bpf_tx_skb net/core/filter.c:2115 [inline] __bpf_redirect_common net/core/filter.c:2154 [inline] __bpf_redirect+0x1293/0x13b0 net/core/filter.c:2161 ____bpf_clone_redirect net/core/filter.c:2430 [inline] bpf_clone_redirect+0x324/0x470 net/core/filter.c:2402 ___bpf_prog_run+0x7ed/0xaee0 kernel/bpf/core.c:1813 __bpf_prog_run512+0xc2/0x110 kernel/bpf/core.c:2038 bpf_dispatcher_nop_func include/linux/bpf.h:903 [inline] __bpf_prog_run include/linux/filter.h:594 [inline] bpf_prog_run include/linux/filter.h:601 [inline] bpf_test_run+0x592/0xd20 net/bpf/test_run.c:402 bpf_prog_test_run_skb+0x1625/0x20b0 net/bpf/test_run.c:1141 bpf_prog_test_run+0x6a0/0x730 kernel/bpf/syscall.c:3620 __sys_bpf+0x88d/0xe70 kernel/bpf/syscall.c:4971 __do_sys_bpf kernel/bpf/syscall.c:5057 [inline] __se_sys_bpf kernel/bpf/syscall.c:5055 [inline] __ia32_sys_bpf+0x9c/0xe0 kernel/bpf/syscall.c:5055 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 Uninit was created at: slab_post_alloc_hook mm/slab.h:732 [inline] slab_alloc_node mm/slub.c:3258 [inline] __kmalloc_node_track_caller+0x814/0x1250 mm/slub.c:4970 kmalloc_reserve net/core/skbuff.c:358 [inline] pskb_expand_head+0x24a/0x1a80 net/core/skbuff.c:1725 skb_ensure_writable+0x3ce/0x460 net/core/skbuff.c:5634 __bpf_try_make_writable net/core/filter.c:1656 [inline] bpf_try_make_writable net/core/filter.c:1662 [inline] bpf_try_make_head_writable net/core/filter.c:1670 [inline] ____bpf_clone_redirect net/core/filter.c:2424 [inline] bpf_clone_redirect+0x17b/0x470 net/core/filter.c:2402 ___bpf_prog_run+0x7ed/0xaee0 kernel/bpf/core.c:1813 __bpf_prog_run512+0xc2/0x110 kernel/bpf/core.c:2038 bpf_dispatcher_nop_func include/linux/bpf.h:903 [inline] __bpf_prog_run include/linux/filter.h:594 [inline] bpf_prog_run include/linux/filter.h:601 [inline] bpf_test_run+0x592/0xd20 net/bpf/test_run.c:402 bpf_prog_test_run_skb+0x1625/0x20b0 net/bpf/test_run.c:1141 bpf_prog_test_run+0x6a0/0x730 kernel/bpf/syscall.c:3620 __sys_bpf+0x88d/0xe70 kernel/bpf/syscall.c:4971 __do_sys_bpf kernel/bpf/syscall.c:5057 [inline] __se_sys_bpf kernel/bpf/syscall.c:5055 [inline] __ia32_sys_bpf+0x9c/0xe0 kernel/bpf/syscall.c:5055 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246 entry_SYSENTER_compat_after_hwframe+0x70/0x82 CPU: 0 PID: 14187 Comm: syz-executor181 Not tainted 6.0.0-rc3-syzkaller-00049-gad8e4e812ba8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 =====================================================