name failslab, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 12154 Comm: syz-executor0 Not tainted 4.19.0+ #80 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: ================================================================== BUG: KMSAN: uninit-value in get_stack_info+0x720/0x9d0 arch/x86/kernel/dumpstack_64.c:139 CPU: 1 PID: 12154 Comm: syz-executor0 Not tainted 4.19.0+ #80 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+0x419/0x480 lib/dump_stack.c:113 kmsan_report+0x19f/0x300 mm/kmsan/kmsan.c:911 __msan_warning+0x76/0xd0 mm/kmsan/kmsan_instr.c:415 get_stack_info+0x720/0x9d0 arch/x86/kernel/dumpstack_64.c:139 __unwind_start+0x7d/0xe0 arch/x86/kernel/unwind_frame.c:402 unwind_start arch/x86/include/asm/unwind.h:54 [inline] show_trace_log_lvl+0x20e/0x11e0 arch/x86/kernel/dumpstack.c:173 show_stack+0x12e/0x170 arch/x86/kernel/dumpstack.c:293 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x32d/0x480 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x11e5/0x13c0 lib/fault-inject.c:149 __should_failslab+0x278/0x2a0 mm/failslab.c:32 should_failslab+0x29/0x70 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc_node mm/slub.c:2653 [inline] slab_alloc mm/slub.c:2735 [inline] __kmalloc+0xcf/0x4d0 mm/slub.c:3783 kmalloc include/linux/slab.h:518 [inline] kzalloc include/linux/slab.h:707 [inline] tcp_sendmsg_fastopen net/ipv4/tcp.c:1144 [inline] tcp_sendmsg_locked+0x640c/0x6c30 net/ipv4/tcp.c:1208 tcp_sendmsg+0xb2/0x100 net/ipv4/tcp.c:1443 inet_sendmsg+0x4e9/0x800 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] __sys_sendto+0x97b/0xb80 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:1796 __x64_sys_sendto+0x6e/0x90 net/socket.c:1796 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457569 Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f08859c2c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f08859c2c90 RCX: 0000000000457569 RDX: fffffffffffffeb4 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 000000000072bf00 R08: 0000000020db4ff0 R09: 0000000000000010 R10: 0000000020008002 R11: 0000000000000246 R12: 00007f08859c36d4 R13: 00000000004c3b86 R14: 00000000004d5cc8 R15: 0000000000000005 Local variable description: ----state@show_trace_log_lvl Variable was created at: show_trace_log_lvl+0xb3/0x11e0 arch/x86/kernel/dumpstack.c:164 show_stack+0x12e/0x170 arch/x86/kernel/dumpstack.c:293 ==================================================================