bisecting fixing commit since c3038e718a19fc596f7b1baba0f83d5146dc7784 building syzkaller on d01bb02a96019cda0fa8c46e5c6d5eb66a273f17 testing commit c3038e718a19fc596f7b1baba0f83d5146dc7784 with gcc (GCC) 8.1.0 kernel signature: 0164cbb77fcca37c98e1313b0dd54c5faafa4ff6039ba38e592fb9f89f7f67c5 all runs: crashed: general protection fault in do_blockdev_direct_IO testing current HEAD 5692097116094a4a7045abcc1dbc172dbdc5657e testing commit 5692097116094a4a7045abcc1dbc172dbdc5657e with gcc (GCC) 8.1.0 kernel signature: 6a1fa95b8ecfd0d8f26947e0b5923b45afd0fe6759768d9f84025268fb682375 run #0: crashed: general protection fault in do_blockdev_direct_IO run #1: crashed: general protection fault in do_blockdev_direct_IO run #2: crashed: KASAN: global-out-of-bounds Read in do_blockdev_direct_IO run #3: crashed: general protection fault in do_blockdev_direct_IO run #4: crashed: general protection fault in do_blockdev_direct_IO run #5: crashed: KASAN: slab-out-of-bounds Read in do_blockdev_direct_IO run #6: crashed: general protection fault in do_blockdev_direct_IO run #7: crashed: general protection fault in do_blockdev_direct_IO run #8: crashed: general protection fault in do_blockdev_direct_IO run #9: crashed: general protection fault in do_blockdev_direct_IO revisions tested: 2, total time: 27m2.834569288s (build: 19m15.108783052s, test: 6m23.376537427s) the crash still happens on HEAD commit msg: Linux 4.19.109 crash: general protection fault in do_blockdev_direct_IO IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready general protection fault: 0000 [#1] PREEMPT SMP KASAN IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready CPU: 1 PID: 7212 Comm: syz-executor.4 Not tainted 4.19.109-syzkaller #0 8021q: adding VLAN 0 to HW filter on device batadv0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:193 [inline] RIP: 0010:compound_head include/linux/page-flags.h:142 [inline] RIP: 0010:get_page include/linux/mm.h:919 [inline] RIP: 0010:submit_page_section fs/direct-io.c:889 [inline] RIP: 0010:do_direct_IO fs/direct-io.c:1096 [inline] RIP: 0010:do_blockdev_direct_IO+0x1c83/0x6d00 fs/direct-io.c:1332 Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 b5 0b d6 ff e9 39 ff ff ff 48 8b 84 24 f0 00 00 00 48 8d 78 08 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 7f 40 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 RSP: 0018:ffff8880768af450 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a6bfa8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008 RBP: ffff8880768af790 R08: fffff9400048bd87 R09: fffff9400048bd86 R10: fffff9400048bd86 R11: ffffea000245ec37 R12: dffffc0000000000 R13: ffffea000245ec00 R14: ffffea000245ec34 R15: ffff8880a8605a40 FS: 00007f973a6e9700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020788ffc CR3: 00000000a0a66000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready __blockdev_direct_IO+0x72/0xd9 fs/direct-io.c:1418 ext4_direct_IO_write fs/ext4/inode.c:3769 [inline] ext4_direct_IO+0x85c/0x1700 fs/ext4/inode.c:3902 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244 ext4_file_write_iter+0x282/0xe60 fs/ext4/file.c:272 call_write_iter include/linux/fs.h:1820 [inline] do_iter_readv_writev+0x4ae/0x960 fs/read_write.c:681 do_iter_write+0x12a/0x510 fs/read_write.c:960 vfs_iter_write+0x5b/0xb0 fs/read_write.c:973 iter_file_splice_write+0x558/0xc30 fs/splice.c:750 do_splice_from fs/splice.c:852 [inline] do_splice+0x4fd/0x12d0 fs/splice.c:1154 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459ef9 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:00007f973a6e8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459ef9 IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004 8021q: adding VLAN 0 to HW filter on device batadv0 RBP: 000000000075bf20 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f973a6e96d4 R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff Modules linked in: ---[ end trace 8d9a0b57fc3437c8 ]--- page:ffff88808d4d7b78 count:0 mapcount:1102416564 mapping:ffff8880768baa78 index:0x82 IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready flags: 0xffff88808d4d7c30(dirty|lru|arch_1|reserved|private|private_2|writeback|mappedtodisk|swapbacked|unevictable|young) 8021q: adding VLAN 0 to HW filter on device batadv0 raw: ffff88808d4d7c30 0000000000000082 ffff8880768baa78 ffff8880768baa78 RIP: 0010:__read_once_size include/linux/compiler.h:193 [inline] RIP: 0010:compound_head include/linux/page-flags.h:142 [inline] RIP: 0010:get_page include/linux/mm.h:919 [inline] RIP: 0010:submit_page_section fs/direct-io.c:889 [inline] RIP: 0010:do_direct_IO fs/direct-io.c:1096 [inline] RIP: 0010:do_blockdev_direct_IO+0x1c83/0x6d00 fs/direct-io.c:1332 raw: 0000000000000082 ffffffff867c1110 0000000041b58ab3 ffffffff87ab7b6f Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 b5 0b d6 ff e9 39 ff ff ff 48 8b 84 24 f0 00 00 00 48 8d 78 08 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 7f 40 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 page dumped because: VM_BUG_ON_PAGE(((unsigned int) page_ref_count(page) + 127u <= 127u)) RSP: 0018:ffff8880768af450 EFLAGS: 00010202 kasan: CONFIG_KASAN_INLINE enabled kasan: CONFIG_KASAN_INLINE enabled kasan: CONFIG_KASAN_INLINE enabled page->mem_cgroup:ffffffff87ab7b6f ------------[ cut here ]------------ kernel BUG at include/linux/mm.h:924! invalid opcode: 0000 [#2] PREEMPT SMP KASAN CPU: 1 PID: 7215 Comm: syz-executor.5 Tainted: G D 4.19.109-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_page include/linux/mm.h:924 [inline] RIP: 0010:submit_page_section fs/direct-io.c:889 [inline] RIP: 0010:do_direct_IO fs/direct-io.c:1096 [inline] RIP: 0010:do_blockdev_direct_IO+0x3bd9/0x6d00 fs/direct-io.c:1332 Code: 11 84 c9 74 0d 89 44 24 10 e8 b3 d4 e9 ff 8b 44 24 10 41 89 47 0c e9 0e d2 ff ff 48 c7 c6 a0 12 d5 86 48 89 df e8 a7 b9 dd ff <0f> 0b 48 8b b4 24 e8 00 00 00 48 89 f0 48 c1 e8 03 42 0f b6 14 20 RSP: 0018:ffff8880930ff450 EFLAGS: 00010282 RAX: 0000000000000021 RBX: ffff88808d4d7b78 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff89a816e0 RBP: ffff8880930ff790 R08: ffffed1015d63ee3 R09: ffffed1015d63ee2 R10: ffffed1015d63ee2 R11: ffff8880aeb1f717 R12: dffffc0000000000 R13: ffff88808d4d7bac R14: ffffea00022e4834 R15: ffff88808d4d7a80 FS: 00007f7362cae700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020788ffc CR3: 0000000089d68000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __blockdev_direct_IO+0x72/0xd9 fs/direct-io.c:1418 ext4_direct_IO_write fs/ext4/inode.c:3769 [inline] ext4_direct_IO+0x85c/0x1700 fs/ext4/inode.c:3902 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244 ext4_file_write_iter+0x282/0xe60 fs/ext4/file.c:272 kasan: GPF could be caused by NULL-ptr deref or user memory access call_write_iter include/linux/fs.h:1820 [inline] do_iter_readv_writev+0x4ae/0x960 fs/read_write.c:681 do_iter_write+0x12a/0x510 fs/read_write.c:960 vfs_iter_write+0x5b/0xb0 fs/read_write.c:973 iter_file_splice_write+0x558/0xc30 fs/splice.c:750 do_splice_from fs/splice.c:852 [inline] do_splice+0x4fd/0x12d0 fs/splice.c:1154 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459ef9 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:00007f7362cadc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459ef9 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7362cae6d4 R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff Modules linked in: general protection fault: 0000 [#3] PREEMPT SMP KASAN CPU: 0 PID: 7225 Comm: syz-executor.2 Tainted: G D 4.19.109-syzkaller #0 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a6bfa8 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:193 [inline] RIP: 0010:compound_head include/linux/page-flags.h:142 [inline] RIP: 0010:get_page include/linux/mm.h:919 [inline] RIP: 0010:submit_page_section fs/direct-io.c:889 [inline] RIP: 0010:do_direct_IO fs/direct-io.c:1096 [inline] RIP: 0010:do_blockdev_direct_IO+0x1c83/0x6d00 fs/direct-io.c:1332 Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 b5 0b d6 ff e9 39 ff ff ff 48 8b 84 24 f0 00 00 00 48 8d 78 08 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 7f 40 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 RSP: 0018:ffff88808e5d7450 EFLAGS: 00010206 RAX: 03fffe22023535d4 RBX: 0000000000000000 RCX: ffffffff81a6bfa8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 1ffff11011a9aea0 RBP: ffff88808e5d7790 R08: fffff940004600c7 R09: fffff940004600c6 R10: fffff940004600c6 R11: ffffea0002300637 R12: dffffc0000000000 R13: ffffea0002300600 R14: ffffea0002300634 R15: ffff88808d4d7400 FS: 00007f49710e9700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 kasan: GPF could be caused by NULL-ptr deref or user memory access CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001f88718 CR3: 00000000890fc000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008 __blockdev_direct_IO+0x72/0xd9 fs/direct-io.c:1418 ext4_direct_IO_write fs/ext4/inode.c:3769 [inline] ext4_direct_IO+0x85c/0x1700 fs/ext4/inode.c:3902 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244 ext4_file_write_iter+0x282/0xe60 fs/ext4/file.c:272 call_write_iter include/linux/fs.h:1820 [inline] do_iter_readv_writev+0x4ae/0x960 fs/read_write.c:681 do_iter_write+0x12a/0x510 fs/read_write.c:960 vfs_iter_write+0x5b/0xb0 fs/read_write.c:973 iter_file_splice_write+0x558/0xc30 fs/splice.c:750 do_splice_from fs/splice.c:852 [inline] do_splice+0x4fd/0x12d0 fs/splice.c:1154 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459ef9 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:00007f49710e8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459ef9 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f49710e96d4 R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff Modules linked in: general protection fault: 0000 [#4] PREEMPT SMP KASAN CPU: 1 PID: 7221 Comm: syz-executor.0 Tainted: G D 4.19.109-syzkaller #0 kasan: GPF could be caused by NULL-ptr deref or user memory access Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:193 [inline] RIP: 0010:compound_head include/linux/page-flags.h:142 [inline] RIP: 0010:get_page include/linux/mm.h:919 [inline] RIP: 0010:submit_page_section fs/direct-io.c:889 [inline] RIP: 0010:do_direct_IO fs/direct-io.c:1096 [inline] RIP: 0010:do_blockdev_direct_IO+0x1c83/0x6d00 fs/direct-io.c:1332 Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 b5 0b d6 ff e9 39 ff ff ff 48 8b 84 24 f0 00 00 00 48 8d 78 08 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 7f 40 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 RSP: 0018:ffff88808c527450 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a6bfa8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008 RBP: ffff88808c527790 R08: fffff9400045c107 R09: fffff9400045c106 R10: fffff9400045c106 R11: ffffea00022e0837 R12: dffffc0000000000 R13: ffffea00022e0800 R14: ffffea00022e0834 R15: ffff8880a8605700 FS: 00007f7029cc0700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f13601518 CR3: 000000008acb5000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __blockdev_direct_IO+0x72/0xd9 fs/direct-io.c:1418 ext4_direct_IO_write fs/ext4/inode.c:3769 [inline] ext4_direct_IO+0x85c/0x1700 fs/ext4/inode.c:3902 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244 ext4_file_write_iter+0x282/0xe60 fs/ext4/file.c:272 call_write_iter include/linux/fs.h:1820 [inline] do_iter_readv_writev+0x4ae/0x960 fs/read_write.c:681 do_iter_write+0x12a/0x510 fs/read_write.c:960 vfs_iter_write+0x5b/0xb0 fs/read_write.c:973 iter_file_splice_write+0x558/0xc30 fs/splice.c:750 do_splice_from fs/splice.c:852 [inline] do_splice+0x4fd/0x12d0 fs/splice.c:1154 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459ef9 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:00007f7029cbfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459ef9 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7029cc06d4 R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff Modules linked in: general protection fault: 0000 [#5] PREEMPT SMP KASAN CPU: 0 PID: 7222 Comm: syz-executor.3 Tainted: G D 4.19.109-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RBP: ffff8880768af790 R08: fffff9400048bd87 R09: fffff9400048bd86 RIP: 0010:__read_once_size include/linux/compiler.h:193 [inline] RIP: 0010:compound_head include/linux/page-flags.h:142 [inline] RIP: 0010:get_page include/linux/mm.h:919 [inline] RIP: 0010:submit_page_section fs/direct-io.c:889 [inline] RIP: 0010:do_direct_IO fs/direct-io.c:1096 [inline] RIP: 0010:do_blockdev_direct_IO+0x1c83/0x6d00 fs/direct-io.c:1332 Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 b5 0b d6 ff e9 39 ff ff ff 48 8b 84 24 f0 00 00 00 48 8d 78 08 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 7f 40 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 R10: fffff9400048bd86 R11: ffffea000245ec37 R12: dffffc0000000000 RSP: 0018:ffff88808b81f450 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a6bfa8 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 000000000000000b RBP: ffff88808b81f790 R08: fffff940003b6e87 R09: fffff940003b6e86 R10: fffff940003b6e86 R11: ffffea0001db7437 R12: dffffc0000000000 R13: ffffea0001db7400 R14: ffffea0001db7434 R15: ffff88808d4d7740 FS: 00007fef0cd06700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000625208 CR3: 000000008c88c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: R13: ffffea000245ec00 R14: ffffea000245ec34 R15: ffff8880a8605a40 FS: 00007f973a6e9700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 __blockdev_direct_IO+0x72/0xd9 fs/direct-io.c:1418 ext4_direct_IO_write fs/ext4/inode.c:3769 [inline] ext4_direct_IO+0x85c/0x1700 fs/ext4/inode.c:3902 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244 ext4_file_write_iter+0x282/0xe60 fs/ext4/file.c:272 CR2: 0000000001f885c8 CR3: 00000000a0a66000 CR4: 00000000001406e0 call_write_iter include/linux/fs.h:1820 [inline] do_iter_readv_writev+0x4ae/0x960 fs/read_write.c:681 do_iter_write+0x12a/0x510 fs/read_write.c:960 vfs_iter_write+0x5b/0xb0 fs/read_write.c:973 iter_file_splice_write+0x558/0xc30 fs/splice.c:750 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 do_splice_from fs/splice.c:852 [inline] do_splice+0x4fd/0x12d0 fs/splice.c:1154 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice fs/splice.c:1408 [inline] __x64_sys_splice+0x248/0x300 fs/splice.c:1408 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459ef9 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:00007fef0cd05c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459ef9 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fef0cd066d4 R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff Modules linked in: