do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline] __do_fast_syscall_32+0x102/0x160 arch/x86/entry/common.c:139 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Uninit was created at: ===================================================== BUG: KMSAN: uninit-value in is_kernel include/linux/kallsyms.h:42 [inline] BUG: KMSAN: uninit-value in is_ksym_addr include/linux/kallsyms.h:50 [inline] BUG: KMSAN: uninit-value in kallsyms_lookup+0x1b5/0x910 kernel/kallsyms.c:291 CPU: 1 PID: 3668 Comm: syz-executor.2 Not tainted 5.10.0-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+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197 is_kernel include/linux/kallsyms.h:42 [inline] is_ksym_addr include/linux/kallsyms.h:50 [inline] kallsyms_lookup+0x1b5/0x910 kernel/kallsyms.c:291 __sprint_symbol+0x140/0x5b0 kernel/kallsyms.c:364 sprint_symbol+0x7c/0x90 kernel/kallsyms.c:395 symbol_string+0x197/0x4c0 lib/vsprintf.c:972 pointer+0x60c/0x1ca0 lib/vsprintf.c:2224 vsnprintf+0x15f2/0x3600 lib/vsprintf.c:2622 vscnprintf+0xbe/0x1c0 lib/vsprintf.c:2721 vprintk_store+0xff/0x1490 kernel/printk/printk.c:1954 vprintk_emit+0x2ae/0x820 kernel/printk/printk.c:2018 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2052 vprintk_func+0x2ed/0x2f0 kernel/printk/printk_safe.c:393 printk+0x180/0x1cd kernel/printk/printk.c:2083 stack_trace_print+0x1a3/0x1f0 kernel/stacktrace.c:32 kmsan_print_origin+0x1a0/0x1b0 mm/kmsan/kmsan_report.c:59 kmsan_internal_chain_origin+0x76/0x130 mm/kmsan/kmsan.c:281 kmsan_memcpy_memmove_metadata+0x25e/0x2d0 mm/kmsan/kmsan.c:226 kmsan_memmove_metadata+0xe/0x10 mm/kmsan/kmsan.c:251 __msan_memmove+0x46/0x60 mm/kmsan/kmsan_instr.c:92 vc_uniscr_insert drivers/tty/vt/vt.c:388 [inline] insert_char+0x204/0x7d0 drivers/tty/vt/vt.c:844 vc_con_write_normal drivers/tty/vt/vt.c:2814 [inline] do_con_write+0x33a3/0x12450 drivers/tty/vt/vt.c:2915 con_write+0x9c/0x190 drivers/tty/vt/vt.c:3255 process_output_block drivers/tty/n_tty.c:595 [inline] n_tty_write+0x166a/0x21d0 drivers/tty/n_tty.c:2333 do_tty_write drivers/tty/tty_io.c:962 [inline] tty_write+0x974/0x1550 drivers/tty/tty_io.c:1046 vfs_write+0x6cc/0x1b00 fs/read_write.c:603 ksys_write+0x275/0x500 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write+0x92/0xb0 fs/read_write.c:667 __ia32_sys_write+0x4a/0x70 fs/read_write.c:667 do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline] __do_fast_syscall_32+0x102/0x160 arch/x86/entry/common.c:139 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f99549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 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:00000000f55930cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000000 RDX: 0000000000001006 RSI: 0000000000000000 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:121 kmsan_alloc_page+0xd3/0x1f0 mm/kmsan/kmsan_shadow.c:274 __alloc_pages_nodemask+0x827/0xf90 mm/page_alloc.c:4989 __alloc_pages include/linux/gfp.h:511 [inline] __alloc_pages_node include/linux/gfp.h:524 [inline] alloc_pages_node include/linux/gfp.h:538 [inline] __page_frag_cache_refill mm/page_alloc.c:5065 [inline] page_frag_alloc+0x357/0x890 mm/page_alloc.c:5095 __netdev_alloc_skb+0xbe2/0xc40 net/core/skbuff.c:456 __netdev_alloc_skb_ip_align include/linux/skbuff.h:2846 [inline] netdev_alloc_skb_ip_align include/linux/skbuff.h:2856 [inline] batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:559 [inline] batadv_iv_ogm_queue_add+0x1386/0x1c50 net/batman-adv/bat_iv_ogm.c:671 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:850 [inline] batadv_iv_ogm_schedule+0x128d/0x1670 net/batman-adv/bat_iv_ogm.c:870 batadv_iv_send_outstanding_bat_ogm_packet+0xd6e/0xef0 net/batman-adv/bat_iv_ogm.c:1724 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2272 worker_thread+0x123c/0x2730 kernel/workqueue.c:2418 kthread+0x51c/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 =====================================================