RBP: 00007f4f472e01d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000100000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe10b316af R14: 00007f4f472e0300 R15: 0000000000022000
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 10951 Comm: syz-executor.2 Not tainted 6.3.0-rc6-next-20230413 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:folio_wait_stable+0x23/0xe0
Code: 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 fd 53 e8 62 58 e7 ff 48 8d 7d 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a4 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffff888046c47488 EFLAGS: 00010213
RAX: dffffc0000000000 RBX: ffff88801bf41680 RCX: ffffc900013e9000
RDX: 0000000000000001 RSI: ffffffff81646e3e RDI: 000000000000000c
RBP: fffffffffffffff4 R08: 0000000000000001 R09: ffffffff856c1213
R10: fffffbfff0ad8242 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88801bf418a8 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f4f472e0700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
loop6: detected capacity change from 0 to 2048
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f472dff78 CR3: 0000000018610000 CR4: 0000000000350ee0
Call Trace:
ext4_da_write_begin+0x38d/0x830
generic_perform_write+0x25a/0x580
ext4_buffered_write_iter+0x164/0x460
ext4_file_write_iter+0xaa1/0x1950
do_iter_readv_writev+0x211/0x3c0
do_iter_write+0x189/0x7e0
vfs_iter_write+0x74/0xb0
iter_file_splice_write+0x73f/0xcb0
direct_splice_actor+0x113/0x180
splice_direct_to_actor+0x33a/0x8c0
do_splice_direct+0x1bc/0x290
do_sendfile+0xb1d/0x12b0
__x64_sys_sendfile64+0x1d5/0x210
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f4f49d6ab19
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:00007f4f472e0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f4f49e7df60 RCX: 00007f4f49d6ab19
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f4f472e01d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000100000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe10b316af R14: 00007f4f472e0300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_wait_stable+0x23/0xe0
Code: 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 fd 53 e8 62 58 e7 ff 48 8d 7d 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a4 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffff888046c47488 EFLAGS: 00010213
RAX: dffffc0000000000 RBX: ffff88801bf41680 RCX: ffffc900013e9000
RDX: 0000000000000001 RSI: ffffffff81646e3e RDI: 000000000000000c
RBP: fffffffffffffff4 R08: 0000000000000001 R09: ffffffff856c1213
R10: fffffbfff0ad8242 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88801bf418a8 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f4f472e0700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f472dff78 CR3: 0000000018610000 CR4: 0000000000350ee0
loop7: detected capacity change from 0 to 2048
loop3: detected capacity change from 0 to 2048
Quota error (device loop6): v2_read_file_info: Free block number too big (0 >= 0).
EXT4-fs warning (device loop6): ext4_enable_quotas:7008: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix.
EXT4-fs warning (device loop4): ext4_enable_quotas:7008: Failed to enable quota tracking (type=0, err=-22, ino=3). Please run e2fsck to fix.
Quota error (device loop7): v2_read_file_info: Free block number too big (0 >= 0).
EXT4-fs (loop4): mount failed
EXT4-fs warning (device loop7): ext4_enable_quotas:7008: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix.
EXT4-fs (loop6): mount failed
EXT4-fs warning (device loop3): ext4_enable_quotas:7008: Failed to enable quota tracking (type=0, err=-22, ino=3). Please run e2fsck to fix.
EXT4-fs (loop3): mount failed
EXT4-fs (loop7): mount failed
==================================================================
BUG: KASAN: slab-use-after-free in rwsem_down_write_slowpath+0x13a6/0x14a0
Read of size 4 at addr ffff88801d38d074 by task syz-executor.2/269
CPU: 0 PID: 269 Comm: syz-executor.2 Tainted: G D 6.3.0-rc6-next-20230413 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0x91/0xf0
print_report+0xcc/0x620
kasan_report+0xc0/0xf0
rwsem_down_write_slowpath+0x13a6/0x14a0
down_write+0x1c3/0x1f0
vfs_unlink+0xd9/0x930
do_unlinkat+0x3b9/0x650
__x64_sys_unlink+0xca/0x110
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f4f49d6a457
Code: 73 01 c3 48 c7 c1 bc ff ff ff 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 57 00 00 00 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:00007ffe10b307f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4f49d6a457
RDX: 00007ffe10b30830 RSI: 00007ffe10b30830 RDI: 00007ffe10b308c0
RBP: 00007ffe10b308c0 R08: 0000000000000001 R09: 00007ffe10b30690
R10: 0000555555f9bd13 R11: 0000000000000206 R12: 00007f4f49dc4105
R13: 00007ffe10b31980 R14: 0000555555f9bc20 R15: 00007ffe10b319c0
Allocated by task 10946:
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
__kasan_slab_alloc+0x59/0x70
kmem_cache_alloc_node+0x189/0x3a0
copy_process+0x3c2/0x7330
kernel_clone+0xeb/0x7d0
__do_sys_clone+0xba/0x100
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
Freed by task 10946:
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
kasan_save_free_info+0x2e/0x50
__kasan_slab_free+0x10a/0x190
kmem_cache_free+0xff/0x4a0
_free_event+0xab4/0x1150
perf_event_release_kernel+0x5b8/0x7a0
perf_release+0x37/0x50
__fput+0x263/0xa40
task_work_run+0x174/0x280
exit_to_user_mode_prepare+0x17d/0x180
syscall_exit_to_user_mode+0x1d/0x50
do_syscall_64+0x4c/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
Last potentially related work creation:
kasan_save_stack+0x22/0x50
__kasan_record_aux_stack+0x95/0xb0
__call_rcu_common.constprop.0+0x6a/0xb90
put_task_struct_rcu_user+0x87/0xd0
__schedule+0x995/0x2a00
__cond_resched+0x46/0x70
__kmem_cache_alloc_node+0x2a3/0x310
__kmalloc_node_track_caller+0x4b/0x160
kvasprintf+0xbe/0x160
kvasprintf_const+0x64/0x1a0
kobject_set_name_vargs+0x5a/0x160
kobject_init_and_add+0xcd/0x170
netdev_queue_update_kobjects+0x186/0x450
netdev_register_kobject+0x2f2/0x3b0
register_netdevice+0xd60/0x1530
register_netdev+0x31/0x60
sit_init_net+0x268/0x570
ops_init+0xbb/0x6b0
setup_net+0x3d9/0x990
copy_net_ns+0x321/0x770
create_new_namespaces+0x3f6/0xb30
copy_namespaces+0x414/0x500
copy_process+0x2b05/0x7330
kernel_clone+0xeb/0x7d0
__do_sys_clone3+0x1d5/0x2e0
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
Second to last potentially related work creation:
kasan_save_stack+0x22/0x50
__kasan_record_aux_stack+0x95/0xb0
__call_rcu_common.constprop.0+0x6a/0xb90
put_task_struct_rcu_user+0x87/0xd0
__schedule+0x995/0x2a00
__cond_resched+0x46/0x70
__wait_for_common+0x96/0x550
kthread_stop+0x171/0x510
destroy_workqueue+0x15a/0x860
ext4_fill_super+0x7d5d/0xb160
get_tree_bdev+0x42c/0x750
vfs_get_tree+0x92/0x360
path_mount+0x1335/0x1e40
__x64_sys_mount+0x286/0x310
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
The buggy address belongs to the object at ffff88801d38d040
which belongs to the cache task_struct of size 6592
The buggy address is located 52 bytes inside of
freed 6592-byte region [ffff88801d38d040, ffff88801d38ea00)
The buggy address belongs to the physical page:
page:00000000a5a0efb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d388
head:00000000a5a0efb2 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88800ed33cc1
flags: 0x100000000010200(slab|head|node=0|zone=1)
page_type: 0xffffffff()
raw: 0100000000010200 ffff888008792640 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff88800ed33cc1
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88801d38cf00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
ffff88801d38cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88801d38d000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
^
ffff88801d38d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801d38d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: f3 0f 1e fa endbr64
b: 55 push %rbp
c: 48 89 fd mov %rdi,%rbp
f: 53 push %rbx
10: e8 62 58 e7 ff callq 0xffe75877
15: 48 8d 7d 18 lea 0x18(%rbp),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 a4 00 00 00 jne 0xd8
34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
3b: fc ff df
3e: 48 rex.W
3f: 8b .byte 0x8b