BUG: unable to handle page fault for address: 000011d0ffffea08
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8464 Comm: systemd-udevd Not tainted 5.12.0-rc8-next-20210422-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:find_stack lib/stackdepot.c:209 [inline]
RIP: 0010:stack_depot_save+0x12b/0x4e0 lib/stackdepot.c:281
Code: 05 da 55 b8 0c 89 da 81 e2 ff ff 0f 00 4c 8d 3c d0 4d 8b 37 4d 85 f6 75 11 e9 94 00 00 00 4d 8b 36 4d 85 f6 0f 84 88 00 00 00 <41> 39 5e 08 75 ee 45 3b 66 0c 75 e8 31 c0 49 8b 4c c6 18 48 39 4c
RSP: 0018:ffffc9000171f790 EFLAGS: 00010206
RAX: ffff88823b000000 RBX: 00000000c3959de3 RCX: 0000000000000003
RDX: 0000000000059de3 RSI: 0000000000000800 RDI: 00000000c0bd4def
RBP: ffffc9000171f800 R08: 0000000095f83906 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 000000000000000c
R13: 000000000000000c R14: 000011d0ffffea00 R15: ffff88823b2cef18
FS:  00007f76660568c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000011d0ffffea08 CR3: 00000000153c5000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kasan_save_stack+0x32/0x40 mm/kasan/common.c:40
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357
 ____kasan_slab_free mm/kasan/common.c:360 [inline]
 ____kasan_slab_free mm/kasan/common.c:325 [inline]
 __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:368
 kasan_slab_free include/linux/kasan.h:212 [inline]
 slab_free_hook mm/slub.c:1593 [inline]
 slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1618
 slab_free mm/slub.c:3178 [inline]
 kfree+0xe5/0x7f0 mm/slub.c:4245
 tomoyo_path_number_perm+0x441/0x590 security/tomoyo/file.c:736
 security_path_chmod+0xe0/0x150 security/security.c:1205
 chmod_common+0x156/0x440 fs/open.c:580
 vfs_fchmod fs/open.c:601 [inline]
 __do_sys_fchmod fs/open.c:610 [inline]
 __se_sys_fchmod fs/open.c:604 [inline]
 __x64_sys_fchmod+0x10e/0x190 fs/open.c:604
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7664ec85c7
Code: 73 01 c3 48 8b 0d d1 d8 2b 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 b8 5b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d8 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007fff48f51e48 EFLAGS: 00000213 ORIG_RAX: 000000000000005b
RAX: ffffffffffffffda RBX: 0000000000000124 RCX: 00007f7664ec85c7
RDX: 0000000000000124 RSI: 0000000000000124 RDI: 000000000000000f
RBP: 000000000000000f R08: 000000000000c0c1 R09: 0000000000000000
R10: 00007fff48f51e80 R11: 0000000000000213 R12: 0000000000000018
R13: 00007fff48f51e70 R14: 0000565397997920 R15: 000000000000000e
Modules linked in:
CR2: 000011d0ffffea08
---[ end trace 45515646a23d9650 ]---
RIP: 0010:find_stack lib/stackdepot.c:209 [inline]
RIP: 0010:stack_depot_save+0x12b/0x4e0 lib/stackdepot.c:281
Code: 05 da 55 b8 0c 89 da 81 e2 ff ff 0f 00 4c 8d 3c d0 4d 8b 37 4d 85 f6 75 11 e9 94 00 00 00 4d 8b 36 4d 85 f6 0f 84 88 00 00 00 <41> 39 5e 08 75 ee 45 3b 66 0c 75 e8 31 c0 49 8b 4c c6 18 48 39 4c
RSP: 0018:ffffc9000171f790 EFLAGS: 00010206
RAX: ffff88823b000000 RBX: 00000000c3959de3 RCX: 0000000000000003
RDX: 0000000000059de3 RSI: 0000000000000800 RDI: 00000000c0bd4def
RBP: ffffc9000171f800 R08: 0000000095f83906 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 000000000000000c
R13: 000000000000000c R14: 000011d0ffffea00 R15: ffff88823b2cef18
FS:  00007f76660568c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000838000 CR3: 00000000153c5000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400