name fail_page_alloc, interval 1, probability 0, space 0, times 1
CPU: 1 PID: 9456 Comm: syz-executor1 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: 9456 Comm: syz-executor1 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_fail_alloc_page mm/page_alloc.c:3072 [inline]
 prepare_alloc_pages mm/page_alloc.c:4341 [inline]
 __alloc_pages_nodemask+0x6fd/0x6640 mm/page_alloc.c:4379
 alloc_pages_vma+0xee6/0x1c70 mm/mempolicy.c:2057
 wp_page_copy+0x5ba/0x2fe0 mm/memory.c:2508
 do_wp_page+0x1160/0x39d0 mm/memory.c:2745
 handle_pte_fault mm/memory.c:4001 [inline]
 __handle_mm_fault mm/memory.c:4109 [inline]
 handle_mm_fault+0x4819/0xa560 mm/memory.c:4146
 __do_page_fault+0x10f8/0x1bb0 arch/x86/mm/fault.c:1396
 do_page_fault+0x98/0xd0 arch/x86/mm/fault.c:1473
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1170
RIP: 0010:copy_user_generic_unrolled+0x89/0xc0 arch/x86/lib/copy_user_64.S:66
Code: 38 4c 89 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 <4c> 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a
RSP: 0018:ffff88005b1dfbc8 EFLAGS: 00010202
RAX: 40103e94cfc5b600 RBX: 0000000000000008 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff88019c1dfdcc RDI: 0000000000706000
RBP: ffff88005b1dfc40 R08: 0000000000000000 R09: ffff88019f67fce8
R10: 0000000000000000 R11: ffffffff8519aee0 R12: ffff8801375d2788
R13: 0000000000000000 R14: 0000000000706000 R15: ffff88019c1dfdcc
 copy_to_user include/linux/uaccess.h:183 [inline]
 tiocgwinsz drivers/tty/tty_io.c:2197 [inline]
 tty_ioctl+0xc13/0x32a0 drivers/tty/tty_io.c:2564
 do_vfs_ioctl+0xf77/0x2d30 fs/ioctl.c:46
 ksys_ioctl fs/ioctl.c:702 [inline]
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:707
 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:707
 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:00007faad2243c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007faad2243c90 RCX: 0000000000457569
RDX: 0000000000706000 RSI: 0000000000005413 RDI: 0000000000000005
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007faad22446d4
R13: 00000000004c0f93 R14: 00000000004d1be8 R15: 0000000000000006

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
==================================================================