TITLE: KMSAN: uninit-value in prepend_path
ALT: bad-access in prepend_path
TYPE: KMSAN-UNINIT-VALUE
CORRUPTED: Y

[  370.741346][ T8537] =====================================================
[  370.748447][ T8537] BUG: KMSAN: uninit-value in prepend_path+0x4ff/0x12b0
[  370.767511][ T8537]  prepend_path+0x4ff/0x12b0
[  370.767565][ T8537]  d_absolute_path+0x193/0x340
[  370.777589][ T8537]  tomoyo_realpath_from_path+0x693/0xc30
[  370.787645][ T8537]  tomoyo_path_number_perm+0x2c1/0xb00
[  370.787695][ T8537]  tomoyo_path_mknod+0x2d2/0x370
[  370.798829][ T8537]  security_path_mknod+0x250/0x340
[  370.809225][ T8537]  path_openat+0x1bb8/0x5dd0
[  370.822492][ T8537]  do_filp_open+0x306/0x760
[  370.822546][ T8537]  do_sys_openat2+0x263/0x8f0
[  370.837151][ T8537]  __x64_sys_open+0x314/0x380
[  370.837196][ T8537]  do_syscall_64+0x54/0xd0
[  370.846688][ T8537]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[  370.853694][ T8537] 
[  370.853702][ T8537] ------------[ cut here ]------------
[  370.853712][ T8537] slab index 52784 out of bounds (433) for stack id 02aece30
[  370.854304][ T8537] WARNING: CPU: 1 PID: 8537 at lib/stackdepot.c:293 stack_depot_fetch+0x33/0x60
[  370.862785][ T8537] Modules linked in:
[  370.862803][ T8537] CPU: 1 PID: 8537 Comm: systemd-udevd Not tainted 5.16.0-rc3-syzkaller #0
[  370.875525][ T8537] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  370.875550][ T8537] RIP: 0010:stack_depot_fetch+0x33/0x60
[  370.897482][ T8537] Code: 00 00 00 31 db 85 ff 74 49 89 f9 0f b7 c1 8b 15 63 6e 8e 0b 39 d0 7e 16 31 db 48 c7 c7 a5 e2 ed 90 89 c6 31 c0 e8 1d bb fa fa <0f> 0b eb 24 89 c0 48 8b 04 c5 d0 87 fc 91 48 85 c0 74 15 c1 e9 0c
[  370.897526][ T8537] RSP: 0018:ffff8880955030c8 EFLAGS: 00010046
[  370.910323][ T8537] 
[  370.910334][ T8537] RAX: e3593401f7992d00 RBX: 0000000000000000 RCX: ffff888095490000
[  370.910371][ T8537] RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
[  370.925439][ T8537] RBP: ffff8880955030d0 R08: ffffffff81966aa7 R09: 0000000000000000
[  370.925476][ T8537] R10: 0000000000000012 R11: ffff888095490000 R12: ffff888095503228
[  370.937924][ T8537] R13: ffff888095490000 R14: 000000000000000c R15: 0000000002aece30
[  370.937958][ T8537] FS:  00007fcc353458c0(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000
[  370.950326][ T8537] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  370.950361][ T8537] CR2: 00007f73e61a41b8 CR3: 000000001e1cf000 CR4: 00000000003506e0
[  370.963855][ T8537] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  370.963887][ T8537] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  370.963916][ T8537] Call Trace:
[  370.989560][ T8537]  <TASK>
[  370.989578][ T8537]  kmsan_print_origin+0x41/0x310
[  371.015831][ T8537]  kmsan_report+0x1ed/0x310
[  371.465751][ T8537]  __msan_warning+0xb8/0x130
[  371.470382][ T8537]  prepend_path+0x4ff/0x12b0
[  371.475031][ T8537]  d_absolute_path+0x193/0x340
[  371.484520][ T8537]  tomoyo_realpath_from_path+0x693/0xc30
[  371.495209][ T8537]  tomoyo_path_number_perm+0x2c1/0xb00
[  371.511737][ T8537]  tomoyo_path_mknod+0x2d2/0x370
[  371.522045][ T8537]  security_path_mknod+0x250/0x340
[  371.527201][ T8537]  path_openat+0x1bb8/0x5dd0
[  371.531869][ T8537]  do_filp_open+0x306/0x760
[  371.536443][ T8537]  do_sys_openat2+0x263/0x8f0
[  371.552603][ T8537]  __x64_sys_open+0x314/0x380
[  371.557323][ T8537]  do_syscall_64+0x54/0xd0
[  371.566401][ T8537]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[  371.572345][ T8537] RIP: 0033:0x7fcc341b76f0
[  371.576779][ T8537] Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 19 30 2c 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe 9d 01 00 48 89 04 24
[  371.596417][ T8537] RSP: 002b:00007ffd094d6588 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
[  371.604858][ T8537] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcc341b76f0
[  371.612850][ T8537] RDX: 0000000000000180 RSI: 00000000000800c2 RDI: 000055cbd62fa370
[  371.620843][ T8537] RBP: 000000000003a2f8 R08: 000000000000feff R09: 0000000000000030
[  371.628832][ T8537] R10: 0000000000000000 R11: 0000000000000246 R12: 000055cbd62fa385
[  371.636820][ T8537] R13: 8421084210842109 R14: 00000000000800c2 R15: 00007fcc34245540
[  371.644844][ T8537]  </TASK>
[  371.647870][ T8537] ---[ end trace c6bc523568e2a7ac ]---
[  371.653336][ T8537] Uninit was created at:
[  371.657571][ T8537] (stack is not available)
[  371.661979][ T8537] 
[  371.664302][ T8537] CPU: 1 PID: 8537 Comm: systemd-udevd Tainted: G      D W         5.16.0-rc3-syzkaller #0
[  371.674308][ T8537] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  371.684375][ T8537] =====================================================
