bisecting fixing commit since c3038e718a19fc596f7b1baba0f83d5146dc7784
building syzkaller on d01bb02a96019cda0fa8c46e5c6d5eb66a273f17
testing commit c3038e718a19fc596f7b1baba0f83d5146dc7784 with gcc (GCC) 8.1.0
kernel signature: 02deb3c2663370a2c1470bdd695799e4e93b73ac
all runs: crashed: general protection fault in do_blockdev_direct_IO
testing current HEAD 312017a460d5ea31d646e7148e400e13db799ddc
testing commit 312017a460d5ea31d646e7148e400e13db799ddc with gcc (GCC) 8.1.0
kernel signature: f74b01451a31c2c29f36177ad7c0f3fed6226f35
all runs: crashed: general protection fault in do_blockdev_direct_IO
revisions tested: 2, total time: 24m49.937642426s (build: 16m48.83121658s, test: 7m2.40681009s)
the crash still happens on HEAD
commit msg: Linux 4.19.89
crash: general protection fault in do_blockdev_direct_IO
kasan: CONFIG_KASAN_INLINE enabled
8021q: adding VLAN 0 to HW filter on device batadv0
kasan: GPF could be caused by NULL-ptr deref or user memory access
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
kasan: CONFIG_KASAN_INLINE enabled
CPU: 1 PID: 7100 Comm: syz-executor.1 Not tainted 4.19.89-syzkaller #0
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+0x1c8d/0x6d00 fs/direct-io.c:1332
Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 8b 11 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
kobject: 'vlan0' (000000003eba7d6f): kobject_add_internal: parent: 'mesh', set: '<NULL>'
RSP: 0018:ffff888088a07450 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a681c2
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff888088a07790 R08: fffff94000501ac7 R09: fffff94000501ac6
R10: fffff94000501ac6 R11: ffffea000280d637 R12: dffffc0000000000
R13: ffffea000280d600 R14: ffffea000280d634 R15: ffff888089c45a80
FS:  00007f507a153700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fab1caf6330 CR3: 000000009a9ed000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kasan: GPF could be caused by NULL-ptr deref or user memory access
 __blockdev_direct_IO+0x72/0xd9 fs/direct-io.c:1418
kasan: GPF could be caused by NULL-ptr deref or user memory access
 ext4_direct_IO_write fs/ext4/inode.c:3754 [inline]
 ext4_direct_IO+0x7c8/0x1780 fs/ext4/inode.c:3881
 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065
 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244
 ext4_file_write_iter+0x281/0xe80 fs/ext4/file.c:270
 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/0x1250 fs/splice.c:1153
 __do_sys_splice fs/splice.c:1420 [inline]
 __se_sys_splice fs/splice.c:1400 [inline]
 __x64_sys_splice+0x248/0x300 fs/splice.c:1400
 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:00007f507a152c78 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: 00007f507a1536d4
R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff
Modules linked in:
general protection fault: 0000 [#2] PREEMPT SMP KASAN
CPU: 0 PID: 7097 Comm: syz-executor.0 Tainted: G      D           4.19.89-syzkaller #0
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+0x1c8d/0x6d00 fs/direct-io.c:1332
Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 8b 11 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:ffff88808616f450 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a681c2
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff88808616f790 R08: fffff940004f9547 R09: fffff940004f9546
R10: fffff940004f9546 R11: ffffea00027caa37 R12: dffffc0000000000
R13: ffffea00027caa00 R14: ffffea00027caa34 R15: ffff88808884fa40
FS:  00007f4551e23700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000013a5750 CR3: 00000000a4dbb000 CR4: 00000000001406f0
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:3754 [inline]
 ext4_direct_IO+0x7c8/0x1780 fs/ext4/inode.c:3881
 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065
 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244
 ext4_file_write_iter+0x281/0xe80 fs/ext4/file.c:270
 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/0x1250 fs/splice.c:1153
 __do_sys_splice fs/splice.c:1420 [inline]
 __se_sys_splice fs/splice.c:1400 [inline]
 __x64_sys_splice+0x248/0x300 fs/splice.c:1400
 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:00007f4551e22c78 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: 00007f4551e236d4
R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff
Modules linked in:
general protection fault: 0000 [#3] PREEMPT SMP KASAN
---[ end trace 9382048e2a0eaa4d ]---
CPU: 1 PID: 7106 Comm: syz-executor.5 Tainted: G      D           4.19.89-syzkaller #0
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+0x1c8d/0x6d00 fs/direct-io.c:1332
Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 8b 11 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
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+0x1c8d/0x6d00 fs/direct-io.c:1332
RSP: 0018:ffff88809c867450 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a681c2
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff88809c867790 R08: fffff94000435b47 R09: fffff94000435b46
R10: fffff94000435b46 R11: ffffea00021ada37 R12: dffffc0000000000
R13: ffffea00021ada00 R14: ffffea00021ada34 R15: ffff88808884f3c0
FS:  00007f87ca078700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000237b000 CR3: 00000000916ca000 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:3754 [inline]
 ext4_direct_IO+0x7c8/0x1780 fs/ext4/inode.c:3881
 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065
 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244
 ext4_file_write_iter+0x281/0xe80 fs/ext4/file.c:270
 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/0x1250 fs/splice.c:1153
 __do_sys_splice fs/splice.c:1420 [inline]
 __se_sys_splice fs/splice.c:1400 [inline]
 __x64_sys_splice+0x248/0x300 fs/splice.c:1400
 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:00007f87ca077c78 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: 00007f87ca0786d4
R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff
Modules linked in:
general protection fault: 0000 [#4] PREEMPT SMP KASAN
CPU: 0 PID: 7105 Comm: syz-executor.2 Tainted: G      D           4.19.89-syzkaller #0
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+0x1c8d/0x6d00 fs/direct-io.c:1332
Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 8b 11 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
---[ end trace 9382048e2a0eaa4e ]---
RSP: 0018:ffff8880a1007450 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a681c2
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff8880a1007790 R08: fffff9400040aa07 R09: fffff9400040aa06
R10: fffff9400040aa06 R11: ffffea0002055037 R12: dffffc0000000000
R13: ffffea0002055000 R14: ffffea0002055034 R15: ffff88808884f700
FS:  00007f5aaa39a700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000013a5750 CR3: 00000000a4ab9000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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+0x1c8d/0x6d00 fs/direct-io.c:1332
 __blockdev_direct_IO+0x72/0xd9 fs/direct-io.c:1418
 ext4_direct_IO_write fs/ext4/inode.c:3754 [inline]
 ext4_direct_IO+0x7c8/0x1780 fs/ext4/inode.c:3881
 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065
 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244
 ext4_file_write_iter+0x281/0xe80 fs/ext4/file.c:270
 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
Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 8b 11 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:ffff888088a07450 EFLAGS: 00010202
 do_splice_from fs/splice.c:852 [inline]
 do_splice+0x4fd/0x1250 fs/splice.c:1153
 __do_sys_splice fs/splice.c:1420 [inline]
 __se_sys_splice fs/splice.c:1400 [inline]
 __x64_sys_splice+0x248/0x300 fs/splice.c:1400
 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:00007f5aaa399c78 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: 00007f5aaa39a6d4
R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff
Modules linked in:
Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 8b 11 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
kasan: CONFIG_KASAN_INLINE enabled
kobject: 'loop4' (000000006a600cda): kobject_uevent_env
kasan: CONFIG_KASAN_INLINE enabled
kobject: 'loop4' (000000006a600cda): fill_kobj_path: path = '/devices/virtual/block/loop4'
kasan: GPF could be caused by NULL-ptr deref or user memory access
kobject: 'loop3' (00000000ba6cf03a): kobject_uevent_env
general protection fault: 0000 [#5] PREEMPT SMP KASAN
kobject: 'loop3' (00000000ba6cf03a): fill_kobj_path: path = '/devices/virtual/block/loop3'
CPU: 1 PID: 7110 Comm: syz-executor.4 Tainted: G      D           4.19.89-syzkaller #0
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+0x1c8d/0x6d00 fs/direct-io.c:1332
Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 8b 11 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:ffff888081bff450 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a681c2
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff888081bff790 R08: fffff94000525207 R09: fffff94000525206
R10: fffff94000525206 R11: ffffea0002929037 R12: dffffc0000000000
R13: ffffea0002929000 R14: ffffea0002929034 R15: ffff888089c45740
FS:  00007facc9f64700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020788ffc CR3: 0000000086198000 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:3754 [inline]
 ext4_direct_IO+0x7c8/0x1780 fs/ext4/inode.c:3881
 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065
 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244
 ext4_file_write_iter+0x281/0xe80 fs/ext4/file.c:270
 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
RSP: 0018:ffff888088a07450 EFLAGS: 00010202
 do_splice_from fs/splice.c:852 [inline]
 do_splice+0x4fd/0x1250 fs/splice.c:1153
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a681c2
 __do_sys_splice fs/splice.c:1420 [inline]
 __se_sys_splice fs/splice.c:1400 [inline]
 __x64_sys_splice+0x248/0x300 fs/splice.c:1400
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
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:00007facc9f63c78 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: 00007facc9f646d4
R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff
Modules linked in:
kasan: GPF could be caused by NULL-ptr deref or user memory access
RBP: ffff888088a07790 R08: fffff94000501ac7 R09: fffff94000501ac6
general protection fault: 0000 [#6] PREEMPT SMP KASAN
R10: fffff94000501ac6 R11: ffffea000280d637 R12: dffffc0000000000
CPU: 1 PID: 7109 Comm: syz-executor.3 Tainted: G      D           4.19.89-syzkaller #0
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+0x1c8d/0x6d00 fs/direct-io.c:1332
Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 8b 11 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:ffff8880821df450 EFLAGS: 00010202
R13: ffffea000280d600 R14: ffffea000280d634 R15: ffff888089c45a80
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a681c2
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff8880821df790 R08: fffff94000527007 R09: fffff94000527006
R10: fffff94000527006 R11: ffffea0002938037 R12: dffffc0000000000
R13: ffffea0002938000 R14: ffffea0002938034 R15: ffff888089c45400
FS:  00007f2cd6d86700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
FS:  00007f507a153700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CR2: 00000000013afa78 CR3: 000000009aaa6000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 __blockdev_direct_IO+0x72/0xd9 fs/direct-io.c:1418
CR2: 00007f7692dfe000 CR3: 000000009a9ed000 CR4: 00000000001406f0
 ext4_direct_IO_write fs/ext4/inode.c:3754 [inline]
 ext4_direct_IO+0x7c8/0x1780 fs/ext4/inode.c:3881
 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244
 ext4_file_write_iter+0x281/0xe80 fs/ext4/file.c:270
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400