BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD fb52067 P4D fb52067 PUD d854067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 12929 Comm: syz-executor.2 Not tainted 6.2.0-rc8-next-20230214 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffff88800fbaf630 EFLAGS: 00010246
RAX: 0000000000000001 RBX: ffffea00011e1580 RCX: ffffffff8161fd5c
RDX: fffff9400023c2b1 RSI: ffffea00011e1580 RDI: ffff88800ee42c80
RBP: ffff88800ee42c80 R08: 0000000000000001 R09: ffffea00011e1587
R10: fffff9400023c2b0 R11: 0000000000000001 R12: 0000000000000000
R13: ffffea00011e1580 R14: ffff888043e5d428 R15: ffff888043e5d4c0
FS:  00007fc048d79700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000146ba000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 filemap_read_folio+0x5c/0x1f0
 filemap_get_pages+0x46f/0x1560
 generic_file_buffered_splice_read.constprop.0+0x2ce/0xcf0
 generic_file_splice_read+0x198/0xb70
 do_splice_to+0x1bc/0x240
 splice_direct_to_actor+0x2b0/0x8c0
 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: 0033:0x7fc04b803b19
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:00007fc048d79188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fc04b916f60 RCX: 00007fc04b803b19
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007fc04b85df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000007fff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe8879b7ff R14: 00007fc048d79300 R15: 0000000000022000
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffff88800fbaf630 EFLAGS: 00010246
RAX: 0000000000000001 RBX: ffffea00011e1580 RCX: ffffffff8161fd5c
RDX: fffff9400023c2b1 RSI: ffffea00011e1580 RDI: ffff88800ee42c80
RBP: ffff88800ee42c80 R08: 0000000000000001 R09: ffffea00011e1587
R10: fffff9400023c2b0 R11: 0000000000000001 R12: 0000000000000000
R13: ffffea00011e1580 R14: ffff888043e5d428 R15: ffff888043e5d4c0
FS:  00007fc048d79700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000146ba000 CR4: 0000000000350ee0
note: syz-executor.2[12929] exited with irqs disabled
loop5: detected capacity change from 0 to 512
EXT4-fs (loop5): unsupported inode size: 0
EXT4-fs (loop5): blocksize: 2048
loop1: detected capacity change from 0 to 512
loop3: detected capacity change from 0 to 512
EXT4-fs (loop1): ext4_check_descriptors: Inode table for group 0 overlaps superblock
EXT4-fs (loop1): group descriptors corrupted!
loop5: detected capacity change from 0 to 512
EXT4-fs (loop5): unsupported inode size: 0
EXT4-fs (loop5): blocksize: 2048
EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none.
EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000.
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD fb52067 P4D fb52067 PUD d854067 PMD 0 
Oops: 0010 [#2] PREEMPT SMP KASAN NOPTI
CPU: 0 PID: 12978 Comm: syz-executor.2 Tainted: G      D            6.2.0-rc8-next-20230214 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffff8880421a7630 EFLAGS: 00010246
RAX: 0000000000000001 RBX: ffffea0001106600 RCX: ffffffff8161fd5c
RDX: fffff94000220cc1 RSI: ffffea0001106600 RDI: ffff88800c5e4000
RBP: ffff88800c5e4000 R08: 0000000000000001 R09: ffffea0001106607
R10: fffff94000220cc0 R11: 0000000000000001 R12: 0000000000000000
R13: ffffea0001106600 R14: ffff888044bf2f08 R15: ffff888044bf2fa0
FS:  00007fc048cf5700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000146ba000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 filemap_read_folio+0x5c/0x1f0
 filemap_get_pages+0x46f/0x1560
 generic_file_buffered_splice_read.constprop.0+0x2ce/0xcf0
 generic_file_splice_read+0x198/0xb70
 do_splice_to+0x1bc/0x240
 splice_direct_to_actor+0x2b0/0x8c0
 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: 0033:0x7fc04b803b19
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:00007fc048cf5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fc04b917260 RCX: 00007fc04b803b19
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000006
RBP: 00007fc04b85df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000007fff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe8879b7ff R14: 00007fc048cf5300 R15: 0000000000022000
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffff88800fbaf630 EFLAGS: 00010246
RAX: 0000000000000001 RBX: ffffea00011e1580 RCX: ffffffff8161fd5c
RDX: fffff9400023c2b1 RSI: ffffea00011e1580 RDI: ffff88800ee42c80
RBP: ffff88800ee42c80 R08: 0000000000000001 R09: ffffea00011e1587
R10: fffff9400023c2b0 R11: 0000000000000001 R12: 0000000000000000
R13: ffffea00011e1580 R14: ffff888043e5d428 R15: ffff888043e5d4c0
FS:  00007fc048cf5700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000146ba000 CR4: 0000000000350ef0
note: syz-executor.2[12978] exited with irqs disabled