BUG: unable to handle kernel paging request at ffff888090b05000 #PF error: [PROT] [WRITE] PGD b201067 P4D b201067 PUD 21ffff067 PMD 8eb00063 PTE 8000000090b05161 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 1 PID: 7686 Comm: rs:main Q:Reg Not tainted 5.0.0+ #24 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:66 Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 RSP: 0018:ffff8880843ef748 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000020 RCX: 0000000000bc3380 RDX: 0000000000ffffe0 RSI: 0000000000000000 RDI: ffff888090b05000 RBP: ffff8880843ef768 R08: ffffed10120e4808 R09: ffff8880906c83a0 R10: ffffed10122d906f R11: ffff8880916c837f R12: ffff8880906c83a0 R13: 0000000000ffffe0 R14: 0000000000000000 R15: ffff8880906c83a0 FS: 00007f5376e31700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888090b05000 CR3: 00000000a4e24000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memset include/linux/string.h:337 [inline] __ext4_expand_extra_isize+0x16c/0x240 fs/ext4/inode.c:5914 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5966 [inline] ext4_mark_inode_dirty+0x6e9/0x940 fs/ext4/inode.c:6042 ext4_da_write_end+0x84d/0xa50 fs/ext4/inode.c:3187 generic_perform_write+0x2f0/0x530 mm/filemap.c:3310 __generic_file_write_iter+0x25e/0x630 mm/filemap.c:3428 ext4_file_write_iter+0x346/0x11a0 fs/ext4/file.c:266 call_write_iter include/linux/fs.h:1863 [inline] new_sync_write+0x4c7/0x760 fs/read_write.c:474 __vfs_write+0xe4/0x110 fs/read_write.c:487 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_write+0xea/0x1f0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f537888f19d Code: d1 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 be fa ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 07 fb ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f5376e30000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000000016f RCX: 00007f537888f19d RDX: 000000000000016f RSI: 0000000001af0340 RDI: 0000000000000006 RBP: 0000000001af0340 R08: 0000000001af049f R09: 00007f537820c937 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f5376e30480 R14: 0000000000000003 R15: 0000000001af0140 Modules linked in: CR2: ffff888090b05000 ---[ end trace c3880c99759236c9 ]--- RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:66 Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 RSP: 0018:ffff8880843ef748 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000020 RCX: 0000000000bc3380 RDX: 0000000000ffffe0 RSI: 0000000000000000 RDI: ffff888090b05000 RBP: ffff8880843ef768 R08: ffffed10120e4808 R09: ffff8880906c83a0 R10: ffffed10122d906f R11: ffff8880916c837f R12: ffff8880906c83a0 R13: 0000000000ffffe0 R14: 0000000000000000 R15: ffff8880906c83a0 FS: 00007f5376e31700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888090b05000 CR3: 00000000a4e24000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400