RSP: 002b:00007fbb2c466c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000dd RAX: ffffffffffffffda RBX: 00007fbb2c466c90 RCX: 000000000045a669 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 00007fbb2c4676d4 R13: 00000000004c0ff7 R14: 00000000004d3b68 R15: 0000000000000005 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 14023 Comm: syz-executor.1 Not tainted 5.4.0-rc7-next-20191115 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mpage_map_and_submit_extent fs/ext4/inode.c:2410 [inline] RIP: 0010:ext4_writepages+0x17fa/0x2f90 fs/ext4/inode.c:2764 Code: ff ff e8 c9 81 b0 ff 48 8b 85 30 fe ff ff 48 8b 8d 00 fe ff ff 48 8d 78 10 48 89 fa 48 c1 ea 03 0f b6 89 c2 00 00 00 48 d3 e3 <42> 80 3c 2a 00 0f 85 be 16 00 00 48 89 58 10 48 c7 c0 28 24 c5 89 RSP: 0018:ffff88805855f9d0 EFLAGS: 00010246 RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 000000000000000c RDX: 0000000000000000 RSI: ffffffff8205fbcd RDI: 0000000000000004 RBP: ffff88805855fc00 R08: 0000000000000000 R09: ffffed1015d0703d R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff888215a00000 R13: dffffc0000000000 R14: 00000000000007ff R15: ffff888093e8c348 FS: 00007fbb2c467700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd2e39c4000 CR3: 00000000a44e3000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344 __filemap_fdatawrite_range+0x2bc/0x3b0 mm/filemap.c:421 generic_fadvise+0x681/0x760 mm/fadvise.c:115 vfs_fadvise+0xa8/0xc0 mm/fadvise.c:187 ksys_fadvise64_64+0x58/0xa0 mm/fadvise.c:201 __do_sys_fadvise64 mm/fadvise.c:216 [inline] __se_sys_fadvise64 mm/fadvise.c:214 [inline] __x64_sys_fadvise64+0x97/0xf0 mm/fadvise.c:214 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a669 Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fbb2c466c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000dd RAX: ffffffffffffffda RBX: 00007fbb2c466c90 RCX: 000000000045a669 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 00007fbb2c4676d4 R13: 00000000004c0ff7 R14: 00000000004d3b68 R15: 0000000000000005 Modules linked in: ---[ end trace 93849019343752e4 ]--- RIP: 0010:mpage_map_and_submit_extent fs/ext4/inode.c:2410 [inline] RIP: 0010:ext4_writepages+0x17fa/0x2f90 fs/ext4/inode.c:2764 Code: ff ff e8 c9 81 b0 ff 48 8b 85 30 fe ff ff 48 8b 8d 00 fe ff ff 48 8d 78 10 48 89 fa 48 c1 ea 03 0f b6 89 c2 00 00 00 48 d3 e3 <42> 80 3c 2a 00 0f 85 be 16 00 00 48 89 58 10 48 c7 c0 28 24 c5 89 RSP: 0018:ffff88805855f9d0 EFLAGS: 00010246 RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 000000000000000c RDX: 0000000000000000 RSI: ffffffff8205fbcd RDI: 0000000000000004 RBP: ffff88805855fc00 R08: 0000000000000000 R09: ffffed1015d0703d R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff888215a00000 R13: dffffc0000000000 R14: 00000000000007ff R15: ffff888093e8c348 FS: 00007fbb2c467700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd2e39c4000 CR3: 00000000a44e3000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400