bisecting fixing commit since c3038e718a19fc596f7b1baba0f83d5146dc7784
building syzkaller on d01bb02a96019cda0fa8c46e5c6d5eb66a273f17
testing commit c3038e718a19fc596f7b1baba0f83d5146dc7784 with gcc (GCC) 8.1.0
kernel signature: e45d9933cf7783aaa52682f42749ed3352b125d5
all runs: crashed: general protection fault in do_blockdev_direct_IO
testing current HEAD dcd888983542055210f5e68f1b1f1f8fe11a369a
testing commit dcd888983542055210f5e68f1b1f1f8fe11a369a with gcc (GCC) 8.1.0
kernel signature: 08caf18037e3b3dbcdd94de92f2a0f81bbf47ccf
all runs: crashed: general protection fault in do_blockdev_direct_IO
revisions tested: 2, total time: 24m24.561892985s (build: 17m6.678182348s, test: 6m24.825433237s)
the crash still happens on HEAD
commit msg: Linux 4.19.95
crash: general protection fault in do_blockdev_direct_IO
IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
kasan: CONFIG_KASAN_INLINE enabled
IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready
kasan: GPF could be caused by NULL-ptr deref or user memory access
IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready
general protection fault: 0000 [#1] PREEMPT SMP KASAN
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
CPU: 0 PID: 7199 Comm: syz-executor.1 Not tainted 4.19.95-syzkaller #0
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready
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 5b 0c 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:ffff888077267450 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a68be2
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff888077267790 R08: fffff940003ecfc7 R09: fffff940003ecfc6
R10: fffff940003ecfc6 R11: ffffea0001f67e37 R12: dffffc0000000000
IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
R13: ffffea0001f67e00 R14: ffffea0001f67e34 R15: ffff88809f0b1a40
FS:  00007f7c8e4d9700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7873371000 CR3: 000000008b6d7000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: 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/0x16b0 fs/ext4/inode.c:3902
IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3065
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready
 __generic_file_write_iter+0x270/0x580 mm/filemap.c:3244
 ext4_file_write_iter+0x281/0xe80 fs/ext4/file.c:270
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
 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
IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
 vfs_iter_write+0x5b/0xb0 fs/read_write.c:973
 iter_file_splice_write+0x558/0xc30 fs/splice.c:750
IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not 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
 __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
IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready
 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:00007f7c8e4d8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459ef9
RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7c8e4d96d4
R13: 00000000004c9b4f R14: 00000000004e0710 R15: 00000000ffffffff
Modules linked in:
hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
---[ end trace 39536d37a957fd21 ]---
IPv6: ADDRCONF(NETDEV_UP): hsr0: 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: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 5b 0c 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
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
RSP: 0018:ffff888077267450 EFLAGS: 00010202
IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81a68be2
IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
RBP: ffff888077267790 R08: fffff940003ecfc7 R09: fffff940003ecfc6
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
R10: fffff940003ecfc6 R11: ffffea0001f67e37 R12: dffffc0000000000
IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
R13: ffffea0001f67e00 R14: ffffea0001f67e34 R15: ffff88809f0b1a40
bridge0: port 2(bridge_slave_1) entered blocking state
FS:  00007f7c8e4d9700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
bridge0: port 2(bridge_slave_1) entered forwarding state
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
CR2: 00007f7873371000 CR3: 000000008b6d7000 CR4: 00000000001406f0
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready