vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl fs/ioctl.c:771 [inline] __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl+0x2e9/0x410 fs/ioctl.c:778 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:778 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: ===================================================== BUG: KMSAN: uninit-value in is_kernel include/linux/kallsyms.h:41 [inline] BUG: KMSAN: uninit-value in is_ksym_addr include/linux/kallsyms.h:49 [inline] BUG: KMSAN: uninit-value in kallsyms_lookup+0x148/0x8e0 kernel/kallsyms.c:290 CPU: 0 PID: 494 Comm: syz-executor.5 Not tainted 5.7.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 is_kernel include/linux/kallsyms.h:41 [inline] is_ksym_addr include/linux/kallsyms.h:49 [inline] kallsyms_lookup+0x148/0x8e0 kernel/kallsyms.c:290 __sprint_symbol+0x140/0x590 kernel/kallsyms.c:363 sprint_symbol+0x7c/0x90 kernel/kallsyms.c:394 symbol_string+0x157/0x420 lib/vsprintf.c:961 pointer+0x1560/0x1e40 lib/vsprintf.c:2188 vsnprintf+0x1a2a/0x31b0 lib/vsprintf.c:2578 vscnprintf+0xc2/0x180 lib/vsprintf.c:2677 vprintk_store+0xef/0x11d0 kernel/printk/printk.c:1942 vprintk_emit+0x2c0/0x8b0 kernel/printk/printk.c:2009 vprintk_default+0x90/0xa0 kernel/printk/printk.c:2054 vprintk_func+0x1ec/0x220 kernel/printk/printk_safe.c:385 printk+0x18b/0x1d3 kernel/printk/printk.c:2087 stack_trace_print+0x1b1/0x1f0 kernel/stacktrace.c:32 kmsan_print_origin+0xf5/0x190 mm/kmsan/kmsan_report.c:52 kmsan_internal_chain_origin+0x76/0x130 mm/kmsan/kmsan.c:302 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116 kvm_memslot_move_forward arch/x86/kvm/../../../virt/kvm/kvm_main.c:961 [inline] update_memslots arch/x86/kvm/../../../virt/kvm/kvm_main.c:1021 [inline] kvm_set_memslot+0x15b8/0x1b90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1152 __kvm_set_memory_region+0x1b3b/0x1dc0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1300 kvm_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1321 [inline] kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1333 [inline] kvm_vm_ioctl+0x131c/0x4350 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3604 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl fs/ioctl.c:771 [inline] __do_sys_ioctl fs/ioctl.c:780 [inline] __se_sys_ioctl+0x2e9/0x410 fs/ioctl.c:778 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:778 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c6f7 Code: 48 83 c4 08 48 89 d8 5b 5d c3 66 0f 1f 84 00 00 00 00 00 48 89 e8 48 f7 d8 48 39 c3 0f 92 c0 eb 92 66 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 0d b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb926cf7068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000000000c RCX: 000000000045c6f7 RDX: 00007fb926cf7510 RSI: 000000004020ae46 RDI: 0000000000000004 RBP: 0000000020ff2000 R08: 00007fb926cf7070 R09: 000000000078bf00 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000fec00000 R13: 0000000000000004 R14: 00000000004cdffa R15: 00007fb926cf96d4 Uninit was created at: kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:144 kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:280 [inline] kmsan_alloc_page+0xb9/0x180 mm/kmsan/kmsan_shadow.c:304 __alloc_pages_nodemask+0x56a2/0x5dc0 mm/page_alloc.c:4848 __alloc_pages include/linux/gfp.h:504 [inline] __alloc_pages_node include/linux/gfp.h:517 [inline] alloc_pages_node include/linux/gfp.h:531 [inline] __page_frag_cache_refill mm/page_alloc.c:4923 [inline] page_frag_alloc+0x3ae/0x910 mm/page_alloc.c:4953 __netdev_alloc_skb+0x703/0xbb0 net/core/skbuff.c:456 __netdev_alloc_skb_ip_align include/linux/skbuff.h:2852 [inline] netdev_alloc_skb_ip_align include/linux/skbuff.h:2862 [inline] batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:558 [inline] batadv_iv_ogm_queue_add+0x10da/0x1900 net/batman-adv/bat_iv_ogm.c:670 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:849 [inline] batadv_iv_ogm_schedule+0x10cb/0x1430 net/batman-adv/bat_iv_ogm.c:869 batadv_iv_send_outstanding_bat_ogm_packet+0xbae/0xd50 net/batman-adv/bat_iv_ogm.c:1722 process_one_work+0x1555/0x1f40 kernel/workqueue.c:2268 worker_thread+0xef6/0x2450 kernel/workqueue.c:2414 kthread+0x4b5/0x4f0 kernel/kthread.c:269 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:353 =====================================================