sk_stream_wait_memory+0x987/0x1310 net/core/stream.c:145 tcp_sendmsg_locked+0x1bdd/0x6d00 net/ipv4/tcp.c:1393 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1433 inet_sendmsg+0x178/0x2e0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] __sys_sendto+0xaba/0xc50 net/socket.c:2000 __do_sys_sendto net/socket.c:2012 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:2008 __x64_sys_sendto+0x6e/0x90 net/socket.c:2008 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 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+0x148/0x770 kernel/kallsyms.c:290 CPU: 1 PID: 23477 Comm: syz-executor.2 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:121 __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+0x148/0x770 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+0x1a0/0x1b0 mm/kmsan/kmsan_report.c:62 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 skb_copy_from_linear_data_offset include/linux/skbuff.h:3662 [inline] skb_copy_bits+0x217/0xdd0 net/core/skbuff.c:2200 tcp_collapse+0x1a15/0x25e0 net/ipv4/tcp_input.c:5002 tcp_prune_queue net/ipv4/tcp_input.c:5149 [inline] tcp_try_rmem_schedule+0x12b7/0x1f10 net/ipv4/tcp_input.c:4544 tcp_data_queue_ofo net/ipv4/tcp_input.c:4565 [inline] tcp_data_queue+0xcd1/0x9c40 net/ipv4/tcp_input.c:4869 tcp_rcv_established+0x13d5/0x31e0 net/ipv4/tcp_input.c:5727 tcp_v4_do_rcv+0x6ce/0xd70 net/ipv4/tcp_ipv4.c:1621 sk_backlog_rcv include/net/sock.h:996 [inline] __release_sock+0x2a3/0x5c0 net/core/sock.c:2460 release_sock+0x99/0x2a0 net/core/sock.c:2976 sk_stream_wait_memory+0x987/0x1310 net/core/stream.c:145 tcp_sendmsg_locked+0x1bdd/0x6d00 net/ipv4/tcp.c:1393 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1433 inet_sendmsg+0x178/0x2e0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] __sys_sendto+0xaba/0xc50 net/socket.c:2000 __do_sys_sendto net/socket.c:2012 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:2008 __x64_sys_sendto+0x6e/0x90 net/socket.c:2008 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cba9 Code: 8d b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2fe1d44c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000503ac0 RCX: 000000000045cba9 RDX: 000000000000fe6a RSI: 00000000200012c0 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000027 R10: 0000000000000011 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a77 R14: 00000000004cd522 R15: 00007f2fe1d456d4 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:269 [inline] kmsan_alloc_page+0xb9/0x180 mm/kmsan/kmsan_shadow.c:293 __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 =====================================================