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KMSAN: uninit-value in vmalloc_to_page

Status: auto-closed as invalid on 2019/07/23 05:47
Subsystems: kernel
[Documentation on labels]
First crash: 1916d, last: 1916d

Sample crash report:
IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
8021q: adding VLAN 0 to HW filter on device batadv0
==================================================================
BUG: KMSAN: uninit-value in vmalloc_to_page+0x668/0x6a0 mm/vmalloc.c:308
CPU: 1 PID: 11893 Comm: syz-executor5 Not tainted 5.0.0-rc1+ #7
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+0x173/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600
 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313
 vmalloc_to_page+0x668/0x6a0 mm/vmalloc.c:308
 vmalloc_to_page_or_null mm/kmsan/kmsan.c:518 [inline]
 kmsan_get_shadow_origin_ptr+0x120/0x440 mm/kmsan/kmsan.c:827
 __msan_metadata_ptr_for_store_8+0x13/0x20 mm/kmsan/kmsan_instr.c:55
 write_ldt+0xae6/0xf00 arch/x86/kernel/ldt.c:520
 __do_sys_modify_ldt arch/x86/kernel/ldt.c:569 [inline]
 __se_sys_modify_ldt+0xe8/0x580 arch/x86/kernel/ldt.c:553
 __x64_sys_modify_ldt+0x45/0x60 arch/x86/kernel/ldt.c:553
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x458099
Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb560db7c78 EFLAGS: 00000246 ORIG_RAX: 000000000000009a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099
RDX: 0000000000000010 RSI: 0000000020000000 RDI: 0000000000000011
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb560db86d4
R13: 00000000004c3ddf R14: 00000000004d6d90 R15: 00000000ffffffff

Uninit was created at:
No stack
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/01/24 05:41 https://github.com/google/kmsan.git master 02f2d5aea531 56558f63 .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.