bisecting fixing commit since c3038e718a19fc596f7b1baba0f83d5146dc7784 building syzkaller on d01bb02a96019cda0fa8c46e5c6d5eb66a273f17 testing commit c3038e718a19fc596f7b1baba0f83d5146dc7784 with gcc (GCC) 8.1.0 kernel signature: 6ce23c10f611cef70b6310870f0b2a69667daf77be63aaf7ae1e2e3b9392032c all runs: crashed: general protection fault in do_blockdev_direct_IO testing current HEAD dce0f88600e49746b4bda873965b671a23ff4313 testing commit dce0f88600e49746b4bda873965b671a23ff4313 with gcc (GCC) 8.1.0 kernel signature: bcd6060329ddcaf58b3add53e8e449772e5ece2b4b518b5961b3a4113eaf2bc7 all runs: crashed: general protection fault in do_blockdev_direct_IO revisions tested: 2, total time: 24m2.196706512s (build: 16m43.116926169s, test: 6m23.962338569s) the crash still happens on HEAD commit msg: Linux 4.19.132 crash: general protection fault in do_blockdev_direct_IO 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 7253 Comm: syz-executor.1 Not tainted 4.19.132-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready 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:931 [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+0x1bc4/0x6d30 fs/direct-io.c:1332 Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 e4 d5 d5 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 1d 42 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 RSP: 0018:ffff888095837450 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a7f209 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008 RBP: ffff888095837790 R08: fffff940004ae0c7 R09: fffff940004ae0c6 R10: fffff940004ae0c6 R11: ffffea0002570637 R12: dffffc0000000000 R13: ffffea0002570600 R14: ffffea0002570634 R15: ffff888096ba5a40 FS: 00007febdc83f700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020788ffc CR3: 00000000887a6000 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: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:1821 [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 IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready do_splice_from fs/splice.c:852 [inline] do_splice+0x4fd/0x12d0 fs/splice.c:1154 IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready __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: 0033:0x459f79 Code: 2d 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007febdc83ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459f79 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007febdc83f6d4 R13: 00000000004c9bcf R14: 00000000004e0790 R15: 00000000ffffffff Modules linked in: kasan: CONFIG_KASAN_INLINE enabled kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#2] PREEMPT SMP KASAN CPU: 0 PID: 7262 Comm: syz-executor.2 Tainted: G D 4.19.132-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:931 [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+0x1bc4/0x6d30 fs/direct-io.c:1332 Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 e4 d5 d5 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 1d 42 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 RSP: 0018:ffff888084587450 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a7f209 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008 RBP: ffff888084587790 R08: fffff940004a8307 R09: fffff940004a8306 R10: fffff940004a8306 R11: ffffea0002541837 R12: dffffc0000000000 R13: ffffea0002541800 R14: ffffea0002541834 R15: ffff888096ba5700 FS: 00007f2892eb8700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020788ffc CR3: 000000009570d000 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: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:1821 [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: 0033:0x459f79 Code: 2d 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2892eb7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459f79 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2892eb86d4 R13: 00000000004c9bcf R14: 00000000004e0790 R15: 00000000ffffffff Modules linked in: general protection fault: 0000 [#3] PREEMPT SMP KASAN CPU: 1 PID: 7263 Comm: syz-executor.5 Tainted: G D 4.19.132-syzkaller #0 ---[ end trace a8ce555c8e1f735a ]--- 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:931 [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+0x1bc4/0x6d30 fs/direct-io.c:1332 Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 e4 d5 d5 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 1d 42 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 RSP: 0018:ffff88808b247450 EFLAGS: 00010202 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:931 [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+0x1bc4/0x6d30 fs/direct-io.c:1332 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a7f209 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008 RBP: ffff88808b247790 R08: fffff9400050b687 R09: fffff9400050b686 R10: fffff9400050b686 R11: ffffea000285b437 R12: dffffc0000000000 R13: ffffea000285b400 R14: ffffea000285b434 R15: ffff88809578fa80 FS: 00007f88648de700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2fc6dde740 CR3: 0000000095560000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 e4 d5 d5 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 1d 42 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 __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 RSP: 0018:ffff888095837450 EFLAGS: 00010202 call_write_iter include/linux/fs.h:1821 [inline] do_iter_readv_writev+0x4ae/0x960 fs/read_write.c:681 do_iter_write+0x12a/0x510 fs/read_write.c:960 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a7f209 vfs_iter_write+0x5b/0xb0 fs/read_write.c:973 iter_file_splice_write+0x558/0xc30 fs/splice.c:750 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008 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 RBP: ffff888095837790 R08: fffff940004ae0c7 R09: fffff940004ae0c6 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459f79 Code: 2d 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f88648ddc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 R10: fffff940004ae0c6 R11: ffffea0002570637 R12: dffffc0000000000 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459f79 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f88648de6d4 R13: 00000000004c9bcf R14: 00000000004e0790 R15: 00000000ffffffff Modules linked in: ---[ end trace a8ce555c8e1f735b ]--- IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready 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:931 [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+0x1bc4/0x6d30 fs/direct-io.c:1332 hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 e4 d5 d5 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 1d 42 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 R13: ffffea0002570600 R14: ffffea0002570634 R15: ffff888096ba5a40 RSP: 0018:ffff888095837450 EFLAGS: 00010202 kasan: CONFIG_KASAN_INLINE enabled RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a7f209 FS: 00007febdc83f700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 RBP: ffff888095837790 R08: fffff940004ae0c7 R09: fffff940004ae0c6 kasan: GPF could be caused by NULL-ptr deref or user memory access R10: fffff940004ae0c6 R11: ffffea0002570637 R12: dffffc0000000000 CR2: 0000000020788ffc CR3: 00000000887a6000 CR4: 00000000001406f0 R13: ffffea0002570600 R14: ffffea0002570634 R15: ffff888096ba5a40 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 FS: 00007f2892eb8700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 general protection fault: 0000 [#4] PREEMPT SMP KASAN CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CPU: 0 PID: 7267 Comm: syz-executor.0 Tainted: G D 4.19.132-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:931 [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+0x1bc4/0x6d30 fs/direct-io.c:1332 Code: 41 ff 0c 24 0f 85 46 ff ff ff 4c 89 ef e8 e4 d5 d5 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 1d 42 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 RSP: 0018:ffff888094f07450 EFLAGS: 00010202 CR2: 0000557af7decad0 CR3: 000000009570d000 CR4: 00000000001406e0 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a7f209 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008 RBP: ffff888094f07790 R08: fffff9400042ff87 R09: fffff9400042ff86 R10: fffff9400042ff86 R11: ffffea000217fc37 R12: dffffc0000000000 R13: ffffea000217fc00 R14: ffffea000217fc34 R15: ffff888096ba53c0 FS: 00007fd9ae665700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0f56382008 CR3: 000000009f302000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400