RAX: ffffffffffffffda RBX: 00007f7de7ba56d4 RCX: 0000000000457099
RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000050 R11: 0000000000000246 R12: 0000000000000004
R13: 00000000004cbfc8 R14: 00000000004c357a R15: 0000000000000001
BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
PGD 800000013029b067 P4D 800000013029b067 PUD 129c22067 PMD 0 
Oops: 0000 [#1] SMP PTI
CPU: 1 PID: 7937 Comm: syz-executor6 Not tainted 4.19.0-rc1+ #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:197 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:142 [inline]
RIP: 0010:PageLocked include/linux/page-flags.h:272 [inline]
RIP: 0010:grow_dev_page fs/buffer.c:950 [inline]
RIP: 0010:grow_buffers fs/buffer.c:1017 [inline]
RIP: 0010:__getblk_slow fs/buffer.c:1044 [inline]
RIP: 0010:__getblk_gfp+0x573/0x1110 fs/buffer.c:1324
Code: 75 a0 44 89 f1 e8 9d 24 ad ff 49 89 c6 4c 8b a3 20 03 00 00 8b 83 a8 0f 00 00 89 45 d0 49 8d 5e 08 4d 85 e4 0f 85 2a 01 00 00 <4d> 8b 7e 08 48 89 9d 08 ff ff ff 48 89 df e8 5a dc db ff 48 8b 08
RSP: 0018:ffff88012761f688 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000040000
RDX: ffffc90003189000 RSI: 000000000003c30a RDI: 000000000003c30b
RBP: ffff88012761f790 R08: 0000000000000000 R09: ffff88021fd39200
R10: 0000000000000000 R11: ffffffff85429350 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801d2a08248
FS:  00007f7de7ba5700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f089cd0edb8 CR3: 00000001ac0cc000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __bread_gfp+0xf6/0x820 fs/buffer.c:1360
 sb_bread include/linux/buffer_head.h:307 [inline]
 ext4_xattr_get_block fs/ext4/xattr.c:2275 [inline]
 ext4_xattr_set_credits+0x250/0x610 fs/ext4/xattr.c:2457
 ext4_xattr_set+0x23e/0x560 fs/ext4/xattr.c:2493
 ext4_xattr_user_set+0x19e/0x1d0 fs/ext4/xattr_user.c:40
 __vfs_setxattr+0x7fa/0x850 fs/xattr.c:149
 __vfs_setxattr_noperm+0x2fc/0x980 fs/xattr.c:180
 vfs_setxattr fs/xattr.c:223 [inline]
 setxattr+0x823/0x9b0 fs/xattr.c:450
 __do_sys_fsetxattr fs/xattr.c:505 [inline]
 __se_sys_fsetxattr+0x2b0/0x3a0 fs/xattr.c:494
 __x64_sys_fsetxattr+0x15d/0x1b0 fs/xattr.c:494
 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457099
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f7de7ba4c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000be
RAX: ffffffffffffffda RBX: 00007f7de7ba56d4 RCX: 0000000000457099
RDX: 0000000020000180 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000050 R11: 0000000000000246 R12: 0000000000000004
R13: 00000000004cbfc8 R14: 00000000004c357a R15: 0000000000000001
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: 0000000000000008
---[ end trace 7150740b9e34581e ]---
RIP: 0010:__read_once_size include/linux/compiler.h:197 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:142 [inline]
RIP: 0010:PageLocked include/linux/page-flags.h:272 [inline]
RIP: 0010:grow_dev_page fs/buffer.c:950 [inline]
RIP: 0010:grow_buffers fs/buffer.c:1017 [inline]
RIP: 0010:__getblk_slow fs/buffer.c:1044 [inline]
RIP: 0010:__getblk_gfp+0x573/0x1110 fs/buffer.c:1324
Code: 75 a0 44 89 f1 e8 9d 24 ad ff 49 89 c6 4c 8b a3 20 03 00 00 8b 83 a8 0f 00 00 89 45 d0 49 8d 5e 08 4d 85 e4 0f 85 2a 01 00 00 <4d> 8b 7e 08 48 89 9d 08 ff ff ff 48 89 df e8 5a dc db ff 48 8b 08
RSP: 0018:ffff88012761f688 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000040000
RDX: ffffc90003189000 RSI: 000000000003c30a RDI: 000000000003c30b
RBP: ffff88012761f790 R08: 0000000000000000 R09: ffff88021fd39200
R10: 0000000000000000 R11: ffffffff85429350 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801d2a08248
FS:  00007f7de7ba5700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f089cd0edb8 CR3: 00000001ac0cc000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400