===================================================== BUG: KMSAN: uninit-value in ip_tunnel_xmit+0x476/0x3610 net/ipv4/ip_tunnel.c:658 ip_tunnel_xmit+0x476/0x3610 net/ipv4/ip_tunnel.c:658 __gre_xmit net/ipv4/ip_gre.c:469 [inline] ipgre_xmit+0xd62/0xe70 net/ipv4/ip_gre.c:661 __netdev_start_xmit include/linux/netdevice.h:4805 [inline] netdev_start_xmit include/linux/netdevice.h:4819 [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:4255 dev_queue_xmit include/linux/netdevice.h:2994 [inline] garp_queue_xmit net/802/garp.c:272 [inline] garp_join_timer+0x18a/0x2e0 net/802/garp.c:423 call_timer_fn+0x43/0x480 kernel/time/timer.c:1474 expire_timers+0x272/0x610 kernel/time/timer.c:1519 __run_timers+0x5bc/0x8c0 kernel/time/timer.c:1790 run_timer_softirq+0x64/0xe0 kernel/time/timer.c:1803 __do_softirq+0x1cc/0x7fb kernel/softirq.c:571 invoke_softirq+0x8f/0x100 kernel/softirq.c:445 __irq_exit_rcu kernel/softirq.c:650 [inline] irq_exit_rcu+0x5a/0x110 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x20/0x30 kmsan_internal_is_module_addr+0x1b/0x20 mm/kmsan/core.c:462 kmsan_get_shadow_origin_ptr+0x34/0xa0 mm/kmsan/shadow.c:98 get_shadow_origin_ptr mm/kmsan/instrumentation.c:35 [inline] __msan_metadata_ptr_for_load_4+0x20/0x30 mm/kmsan/instrumentation.c:76 stack_trace_consume_entry+0x16b/0x1e0 kernel/stacktrace.c:94 arch_stack_walk+0x195/0x280 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0xb2/0x100 kernel/stacktrace.c:122 kmsan_save_stack_with_flags mm/kmsan/core.c:80 [inline] kmsan_internal_poison_memory+0x45/0x90 mm/kmsan/core.c:65 kmsan_slab_alloc+0xd9/0x150 mm/kmsan/hooks.c:69 slab_post_alloc_hook mm/slab.h:755 [inline] slab_alloc_node mm/slub.c:3258 [inline] slab_alloc mm/slub.c:3266 [inline] __kmalloc+0x7bd/0x10d0 mm/slub.c:4458 kmalloc include/linux/slab.h:605 [inline] tomoyo_realpath_from_path+0x123/0xaf0 security/tomoyo/realpath.c:254 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x27d/0xb40 security/tomoyo/file.c:822 tomoyo_inode_getattr+0x30/0x40 security/tomoyo/tomoyo.c:122 security_inode_getattr+0x121/0x1f0 security/security.c:1344 vfs_getattr fs/stat.c:157 [inline] vfs_statx+0x19d/0x5d0 fs/stat.c:232 vfs_fstatat fs/stat.c:255 [inline] __do_sys_newfstatat fs/stat.c:425 [inline] __se_sys_newfstatat+0xd0/0x940 fs/stat.c:419 __x64_sys_newfstatat+0xb9/0x110 fs/stat.c:419 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Uninit was created at: slab_post_alloc_hook mm/slab.h:755 [inline] slab_alloc_node mm/slub.c:3258 [inline] __kmalloc_node_track_caller+0x86c/0x1230 mm/slub.c:4995 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x34a/0xd70 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1426 [inline] garp_pdu_init net/802/garp.c:225 [inline] garp_pdu_append_attr+0x299/0x11c0 net/802/garp.c:296 garp_attr_event+0x146/0x280 net/802/garp.c:338 garp_gid_event net/802/garp.c:402 [inline] garp_join_timer+0xc1/0x2e0 net/802/garp.c:419 call_timer_fn+0x43/0x480 kernel/time/timer.c:1474 expire_timers+0x272/0x610 kernel/time/timer.c:1519 __run_timers+0x5bc/0x8c0 kernel/time/timer.c:1790 run_timer_softirq+0x64/0xe0 kernel/time/timer.c:1803 __do_softirq+0x1cc/0x7fb kernel/softirq.c:571 CPU: 0 PID: 2847 Comm: udevd Not tainted 5.19.0-rc4-syzkaller-31331-gef4d99f50920 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 =====================================================