do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline] do_fast_syscall_32+0x3c7/0x6e0 arch/x86/entry/common.c:410 entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139 Uninit was created 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:292 CPU: 0 PID: 4633 Comm: syz-executor.1 Not tainted 5.6.0-rc7-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:292 __sprint_symbol+0x140/0x590 kernel/kallsyms.c:365 sprint_symbol+0x7c/0x90 kernel/kallsyms.c:396 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:1917 vprintk_emit+0x2c0/0x860 kernel/printk/printk.c:1984 vprintk_default+0x90/0xa0 kernel/printk/printk.c:2029 vprintk_func+0x636/0x820 kernel/printk/printk_safe.c:386 printk+0x18b/0x1d3 kernel/printk/printk.c:2062 stack_trace_print+0x1b1/0x1f0 kernel/stacktrace.c:32 kmsan_print_origin+0x180/0x190 mm/kmsan/kmsan_report.c:59 kmsan_internal_chain_origin+0x76/0x130 mm/kmsan/kmsan.c:302 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memmove_metadata+0xe/0x10 mm/kmsan/kmsan.c:272 __msan_memmove+0x43/0x50 mm/kmsan/kmsan_instr.c:92 vc_uniscr_insert drivers/tty/vt/vt.c:389 [inline] insert_char+0x20c/0x750 drivers/tty/vt/vt.c:838 do_con_write+0x50be/0x13160 drivers/tty/vt/vt.c:2769 con_write+0x8e/0xe0 drivers/tty/vt/vt.c:3144 process_output_block drivers/tty/n_tty.c:595 [inline] n_tty_write+0x13c7/0x1d40 drivers/tty/n_tty.c:2333 do_tty_write drivers/tty/tty_io.c:962 [inline] tty_write+0xc06/0x12e0 drivers/tty/tty_io.c:1046 __vfs_write+0x1a9/0xca0 fs/read_write.c:494 __kernel_write+0x208/0x5f0 fs/read_write.c:515 write_pipe_buf+0x1f9/0x2a0 fs/splice.c:809 splice_from_pipe_feed fs/splice.c:512 [inline] __splice_from_pipe+0x539/0xed0 fs/splice.c:636 splice_from_pipe fs/splice.c:671 [inline] default_file_splice_write+0x1ee/0x3c0 fs/splice.c:821 do_splice_from fs/splice.c:863 [inline] direct_splice_actor+0x19e/0x200 fs/splice.c:1037 splice_direct_to_actor+0x8a9/0x11e0 fs/splice.c:992 do_splice_direct+0x342/0x580 fs/splice.c:1080 do_sendfile+0xff5/0x1d10 fs/read_write.c:1520 __do_compat_sys_sendfile fs/read_write.c:1602 [inline] __se_compat_sys_sendfile+0x301/0x3c0 fs/read_write.c:1585 __ia32_compat_sys_sendfile+0x11a/0x160 fs/read_write.c:1585 do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline] do_fast_syscall_32+0x3c7/0x6e0 arch/x86/entry/common.c:410 entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff4d99 Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5def0cc EFLAGS: 00000296 ORIG_RAX: 00000000000000bb RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000003 RDX: 0000000000000000 RSI: 0000000080004103 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 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:317 [inline] kmsan_alloc_page+0xb9/0x180 mm/kmsan/kmsan_shadow.c:349 __alloc_pages_nodemask+0x5712/0x5e80 mm/page_alloc.c:4777 __alloc_pages include/linux/gfp.h:498 [inline] __alloc_pages_node include/linux/gfp.h:511 [inline] alloc_pages_node include/linux/gfp.h:525 [inline] __page_frag_cache_refill mm/page_alloc.c:4852 [inline] page_frag_alloc+0x3ae/0x910 mm/page_alloc.c:4882 __netdev_alloc_skb+0x703/0xbb0 net/core/skbuff.c:456 __netdev_alloc_skb_ip_align include/linux/skbuff.h:2850 [inline] netdev_alloc_skb_ip_align include/linux/skbuff.h:2860 [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:2266 worker_thread+0xef6/0x2450 kernel/workqueue.c:2412 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:353 =====================================================