bisecting fixing commit since c3038e718a19fc596f7b1baba0f83d5146dc7784
building syzkaller on d01bb02a96019cda0fa8c46e5c6d5eb66a273f17
testing commit c3038e718a19fc596f7b1baba0f83d5146dc7784 with gcc (GCC) 8.4.1 20210217
kernel signature: 0ad361cd36ef2a28663117016491d7a94973e2457df030f4f47c0b0cc88a98db
run #0: crashed: KASAN: wild-memory-access in do_blockdev_direct_IO
run #1: crashed: general protection fault in do_blockdev_direct_IO
run #2: crashed: general protection fault in do_blockdev_direct_IO
run #3: crashed: general protection fault in do_blockdev_direct_IO
run #4: crashed: KASAN: slab-out-of-bounds Read in do_blockdev_direct_IO
run #5: crashed: general protection fault in do_blockdev_direct_IO
run #6: crashed: general protection fault in do_blockdev_direct_IO
run #7: crashed: KASAN: slab-out-of-bounds Read 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
run #10: crashed: general protection fault in do_blockdev_direct_IO
run #11: crashed: general protection fault in do_blockdev_direct_IO
run #12: crashed: general protection fault in do_blockdev_direct_IO
run #13: crashed: KASAN: slab-out-of-bounds Read in do_blockdev_direct_IO
run #14: crashed: general protection fault in do_blockdev_direct_IO
run #15: crashed: general protection fault in do_blockdev_direct_IO
run #16: crashed: general protection fault in do_blockdev_direct_IO
run #17: crashed: general protection fault in do_blockdev_direct_IO
run #18: crashed: general protection fault in do_blockdev_direct_IO
run #19: crashed: general protection fault in do_blockdev_direct_IO
testing current HEAD eb575cd5d7f60241d016fdd13a9e86d962093c9b
testing commit eb575cd5d7f60241d016fdd13a9e86d962093c9b with gcc (GCC) 8.4.1 20210217
kernel signature: 816a579d8c96cf551671f7e127e04016aaf58c9c7285906d84dbfb1f5810b8ba
all runs: crashed: general protection fault in do_blockdev_direct_IO
revisions tested: 2, total time: 25m34.638116538s (build: 18m35.783695089s, test: 6m10.327036681s)
the crash still happens on HEAD
commit msg: Linux 4.19.195
crash: general protection fault in do_blockdev_direct_IO
IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready
general protection fault: 0000 [#1] PREEMPT SMP KASAN
IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
CPU: 0 PID: 6547 Comm: syz-executor.3 Not tainted 4.19.195-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:261 [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:890 [inline]
RIP: 0010:do_direct_IO fs/direct-io.c:1097 [inline]
RIP: 0010:do_blockdev_direct_IO+0xeb0/0x6f70 fs/direct-io.c:1333
Code: 00 00 48 c7 84 24 90 02 00 00 00 00 00 00 45 85 e4 0f 85 35 0c 00 00 48 8b 84 24 f0 00 00 00 48 8d 78 08 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 ba 51 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 08
RSP: 0018:ffff8881d1dbf450 EFLAGS: 00010202
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffffffff81a5605e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff8881d1dbf790 R08: fffff94000e8ecc7 R09: fffff94000e8ecc6
R10: fffff94000e8ecc6 R11: ffffea0007476637 R12: 0000000000000000
R13: ffffea0007476600 R14: ffffea0007476634 R15: ffff8881e5a19a40
FS:  00007f11aa26a700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffec1f0dc60 CR3: 00000001e646c005 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
 __blockdev_direct_IO+0x72/0xe0 fs/direct-io.c:1419
 ext4_direct_IO_write fs/ext4/inode.c:3777 [inline]
 ext4_direct_IO+0x87f/0x17d0 fs/ext4/inode.c:3915
 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3073
 __generic_file_write_iter+0x279/0x590 mm/filemap.c:3252
 ext4_file_write_iter+0x282/0xe60 fs/ext4/file.c:272
IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready
 call_write_iter include/linux/fs.h:1821 [inline]
 do_iter_readv_writev+0x4ae/0x960 fs/read_write.c:681
 do_iter_write fs/read_write.c:960 [inline]
 do_iter_write+0x12a/0x510 fs/read_write.c:941
 vfs_iter_write+0x5b/0xb0 fs/read_write.c:973
 iter_file_splice_write+0x55d/0xc40 fs/splice.c:750
IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready
 do_splice_from fs/splice.c:852 [inline]
 do_splice+0xa25/0x12b0 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: 0033:0x461949
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f11aa26a1a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 0000000000461949
RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000006 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004f8f90 R14: 00000000004b50c4 R15: 00007f11aa26a6bc
Modules linked in:
---[ end trace 9b072514c46430cc ]---
kasan: CONFIG_KASAN_INLINE enabled
RIP: 0010:__read_once_size include/linux/compiler.h:261 [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:890 [inline]
RIP: 0010:do_direct_IO fs/direct-io.c:1097 [inline]
RIP: 0010:do_blockdev_direct_IO+0xeb0/0x6f70 fs/direct-io.c:1333
kasan: GPF could be caused by NULL-ptr deref or user memory access
Code: 00 00 48 c7 84 24 90 02 00 00 00 00 00 00 45 85 e4 0f 85 35 0c 00 00 48 8b 84 24 f0 00 00 00 48 8d 78 08 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 ba 51 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 08
general protection fault: 0000 [#2] PREEMPT SMP KASAN
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
CPU: 1 PID: 6553 Comm: syz-executor.1 Tainted: G      D           4.19.195-syzkaller #0
IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RSP: 0018:ffff8881d1dbf450 EFLAGS: 00010202
RIP: 0010:__read_once_size include/linux/compiler.h:261 [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:890 [inline]
RIP: 0010:do_direct_IO fs/direct-io.c:1097 [inline]
RIP: 0010:do_blockdev_direct_IO+0xeb0/0x6f70 fs/direct-io.c:1333
Code: 00 00 48 c7 84 24 90 02 00 00 00 00 00 00 45 85 e4 0f 85 35 0c 00 00 48 8b 84 24 f0 00 00 00 48 8d 78 08 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 ba 51 00 00 48 8b b4 24 f0 00 00 00 48 8b 46 08
RSP: 0018:ffff8881cf38f450 EFLAGS: 00010202
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffffffff81a5605e
IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
RBP: ffff8881cf38f790 R08: fffff94000e91647 R09: fffff94000e91646
R10: fffff94000e91646 R11: ffffea000748b237 R12: 0000000000000000
R13: ffffea000748b200 R14: ffffea000748b234 R15: ffff8881e5be5a80
FS:  00007f18ce459700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
CR2: 00007f8aeb12f000 CR3: 00000001e4363004 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffffffff81a5605e
 __blockdev_direct_IO+0x72/0xe0 fs/direct-io.c:1419
 ext4_direct_IO_write fs/ext4/inode.c:3777 [inline]
 ext4_direct_IO+0x87f/0x17d0 fs/ext4/inode.c:3915
 generic_file_direct_write+0x1ee/0x410 mm/filemap.c:3073
IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready
 __generic_file_write_iter+0x279/0x590 mm/filemap.c:3252
 ext4_file_write_iter+0x282/0xe60 fs/ext4/file.c:272
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready
RBP: ffff8881d1dbf790 R08: fffff94000e8ecc7 R09: fffff94000e8ecc6
 call_write_iter include/linux/fs.h:1821 [inline]
 do_iter_readv_writev+0x4ae/0x960 fs/read_write.c:681
8021q: adding VLAN 0 to HW filter on device batadv0
 do_iter_write fs/read_write.c:960 [inline]
 do_iter_write+0x12a/0x510 fs/read_write.c:941
R10: fffff94000e8ecc6 R11: ffffea0007476637 R12: 0000000000000000
 vfs_iter_write+0x5b/0xb0 fs/read_write.c:973
 iter_file_splice_write+0x55d/0xc40 fs/splice.c:750
R13: ffffea0007476600 R14: ffffea0007476634 R15: ffff8881e5a19a40
 do_splice_from fs/splice.c:852 [inline]
 do_splice+0xa25/0x12b0 fs/splice.c:1154
FS:  00007f11aa26a700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000
 __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
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x461949
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
CR2: 0000000000500000 CR3: 00000001e646c006 CR4: 00000000001606f0
RSP: 002b:00007f18ce4591a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 0000000000461949
RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000006 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004f8f90 R14: 00000000004b50c4 R15: 00007f18ce4596bc
Modules linked in:
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
8021q: adding VLAN 0 to HW filter on device batadv0
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kasan: CONFIG_KASAN_INLINE enabled