loop7: detected capacity change from 0 to 4097
cgroup2: Unknown parameter 'blkio'
9p: Unknown Cache mode n
SELinux: security_context_str_to_sid (root) failed with errno=-22
==================================================================
BUG: KASAN: use-after-free in __kernfs_remove+0x9dd/0xb30
Read of size 2 at addr ffff888044a71b78 by task syz-executor.1/5038
CPU: 1 PID: 5038 Comm: syz-executor.1 Not tainted 6.0.0-rc3-next-20220829 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
dump_stack_lvl+0x8b/0xb3
print_report.cold+0x5e/0x5e5
kasan_report+0xb1/0x1c0
__kernfs_remove+0x9dd/0xb30
kernfs_remove_by_name_ns+0xa8/0x110
sysfs_slab_add+0x142/0x1f0
__kmem_cache_create+0x49d/0x600
kmem_cache_create_usercopy+0x1fd/0x2e0
p9_client_create+0xc85/0x1050
v9fs_session_init+0x1dd/0x1670
v9fs_mount+0xb9/0xbd0
legacy_get_tree+0x105/0x220
vfs_get_tree+0x8e/0x300
path_mount+0x1310/0x1e20
__x64_sys_mount+0x282/0x300
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4ae40a8b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4ae161e188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4ae41bbf60 RCX: 00007f4ae40a8b19
RDX: 00000000200025c0 RSI: 0000000020000240 RDI: 0000000000000000
RBP: 00007f4ae4102f6d R08: 0000000020000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd17bf93cf R14: 00007f4ae161e300 R15: 0000000000022000
Allocated by task 5039:
kasan_save_stack+0x1e/0x40
__kasan_slab_alloc+0x66/0x80
kmem_cache_alloc+0x1b1/0x3e0
__kernfs_new_node+0xd4/0x8c0
kernfs_create_dir_ns+0x9c/0x230
sysfs_create_dir_ns+0x127/0x290
kobject_add_internal+0x24c/0x8e0
kobject_init_and_add+0x101/0x160
sysfs_slab_add+0x165/0x1f0
__kmem_cache_create+0x49d/0x600
kmem_cache_create_usercopy+0x1fd/0x2e0
p9_client_create+0xc85/0x1050
v9fs_session_init+0x1dd/0x1670
v9fs_mount+0xb9/0xbd0
legacy_get_tree+0x105/0x220
vfs_get_tree+0x8e/0x300
path_mount+0x1310/0x1e20
__x64_sys_mount+0x282/0x300
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 5038:
kasan_save_stack+0x1e/0x40
kasan_set_track+0x21/0x30
kasan_set_free_info+0x20/0x40
__kasan_slab_free+0x108/0x190
kmem_cache_free+0xf7/0x610
kernfs_put.part.0+0x2c7/0x540
kernfs_put+0x42/0x50
__kernfs_remove+0x7d4/0xb30
kernfs_remove_by_name_ns+0xa8/0x110
sysfs_slab_add+0x142/0x1f0
__kmem_cache_create+0x49d/0x600
kmem_cache_create_usercopy+0x1fd/0x2e0
p9_client_create+0xc85/0x1050
v9fs_session_init+0x1dd/0x1670
v9fs_mount+0xb9/0xbd0
legacy_get_tree+0x105/0x220
vfs_get_tree+0x8e/0x300
path_mount+0x1310/0x1e20
__x64_sys_mount+0x282/0x300
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff888044a71ae0
which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 152 bytes inside of
168-byte region [ffff888044a71ae0, ffff888044a71b88)
The buggy address belongs to the physical page:
page:00000000c762c616 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x44a71
flags: 0x100000000000200(slab|node=0|zone=1)
raw: 0100000000000200 0000000000000000 dead000000000122 ffff88800847b8c0
raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888044a71a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888044a71a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb
>ffff888044a71b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888044a71b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb
ffff888044a71c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
==================================================================
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=5031 comm=syz-executor.7
syz-executor.2: attempt to access beyond end of device
loop2: rw=2049, sector=40, nr_sectors = 4 limit=40
cgroup2: Unknown parameter 'blkio'
SELinux: security_context_str_to_sid (root) failed with errno=-22
cgroup2: Unknown parameter 'blkio'
SELinux: security_context_str_to_sid (root) failed with errno=-22
loop7: detected capacity change from 0 to 4097
loop2: detected capacity change from 0 to 40
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=5070 comm=syz-executor.7
syz-executor.2: attempt to access beyond end of device
loop2: rw=2049, sector=40, nr_sectors = 4 limit=40
general protection fault, probably for non-canonical address 0x2bbebdc22011708: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 5077 Comm: systemd-udevd Tainted: G B 6.0.0-rc3-next-20220829 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:qlist_free_all+0xaf/0x1a0
Code: 80 4c 01 c2 0f 82 f8 00 00 00 48 c7 c0 00 00 00 80 48 2b 05 f3 3c 9b 03 48 01 d0 48 c1 e8 0c 48 c1 e0 06 48 03 05 d1 3c 9b 03 <48> 8b 48 08 48 89 c2 f6 c1 01 0f 85 ba 00 00 00 0f 1f 44 00 00 48
RSP: 0018:ffff8880453b7c70 EFLAGS: 00010207
RAX: 02bbebdc22011700 RBX: aeffff888045c055 RCX: 0000000000070003
RDX: aeffff890045c055 RSI: ffffea0000240000 RDI: 0000000040000000
RBP: 0000000000000000 R08: aeffff888045c055 R09: 0000000000070003
R10: ffffea0000240000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880453b7cb0 R14: 0000000000000000 R15: ffff888009002201
FS: 00007fef0bc3a8c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561ebb9560e0 CR3: 00000000175dc000 CR4: 0000000000350ee0
Call Trace:
kasan_quarantine_reduce+0x184/0x210
__kasan_slab_alloc+0x7c/0x80
kmem_cache_alloc+0x1b1/0x3e0
getname_flags.part.0+0x50/0x4f0
getname+0x8e/0xd0
do_sys_openat2+0xf9/0x4c0
__x64_sys_openat+0x13f/0x1f0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fef0c0e9d62
Code: c0 f6 c2 40 75 52 89 d0 45 31 d2 25 00 00 41 00 3d 00 00 41 00 74 41 64 8b 04 25 18 00 00 00 85 c0 75 65 b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 a2 00 00 00 48 8b 4c 24 38 64 48 2b 0c 25
RSP: 002b:00007fff92a1e7a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fef0c0e9d62
RDX: 00000000002a0000 RSI: 0000561ebb9800d1 RDI: 0000000000000010
RBP: 0000561ebb9800d0 R08: 0000561eba9878f0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000561ebb975684
R13: 0000000000000010 R14: 0000000000000004 R15: 0000561ebb9800d1
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:qlist_free_all+0xaf/0x1a0
Code: 80 4c 01 c2 0f 82 f8 00 00 00 48 c7 c0 00 00 00 80 48 2b 05 f3 3c 9b 03 48 01 d0 48 c1 e8 0c 48 c1 e0 06 48 03 05 d1 3c 9b 03 <48> 8b 48 08 48 89 c2 f6 c1 01 0f 85 ba 00 00 00 0f 1f 44 00 00 48
RSP: 0018:ffff8880453b7c70 EFLAGS: 00010207
RAX: 02bbebdc22011700 RBX: aeffff888045c055 RCX: 0000000000070003
RDX: aeffff890045c055 RSI: ffffea0000240000 RDI: 0000000040000000
RBP: 0000000000000000 R08: aeffff888045c055 R09: 0000000000070003
R10: ffffea0000240000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880453b7cb0 R14: 0000000000000000 R15: ffff888009002201
FS: 00007fef0bc3a8c0(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561ebb9560e0 CR3: 00000000175dc000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 4c 01 c2 add %r8,%rdx
3: 0f 82 f8 00 00 00 jb 0x101
9: 48 c7 c0 00 00 00 80 mov $0xffffffff80000000,%rax
10: 48 2b 05 f3 3c 9b 03 sub 0x39b3cf3(%rip),%rax # 0x39b3d0a
17: 48 01 d0 add %rdx,%rax
1a: 48 c1 e8 0c shr $0xc,%rax
1e: 48 c1 e0 06 shl $0x6,%rax
22: 48 03 05 d1 3c 9b 03 add 0x39b3cd1(%rip),%rax # 0x39b3cfa
* 29: 48 8b 48 08 mov 0x8(%rax),%rcx <-- trapping instruction
2d: 48 89 c2 mov %rax,%rdx
30: f6 c1 01 test $0x1,%cl
33: 0f 85 ba 00 00 00 jne 0xf3
39: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
3e: 48 rex.W