bisecting fixing commit since 6f2f486d57c4d562cdf4932320b66fbb878ab1c4
building syzkaller on 4a77ae0bdc5cd75ebe88ce7c896aae6bbf457a29
testing commit 6f2f486d57c4d562cdf4932320b66fbb878ab1c4 with gcc (GCC) 8.1.0
kernel signature: 0550101130c0b286999768390158b3a978149f9126fb08f0fcfe52dce244aac1
run #0: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #1: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #2: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #3: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #4: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #5: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #6: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #7: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #8: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #9: OK
testing current HEAD 3552c3709c0e78144c11748718180441ac647ece
testing commit 3552c3709c0e78144c11748718180441ac647ece with gcc (GCC) 8.1.0
kernel signature: 9075cc14d14ececf2ae866928fbf558118e8a307fe9f9e320b8d11b7704ee406
run #0: crashed: BUG: sleeping function called from invalid context in sta_info_move_state
run #1: crashed: BUG: sleeping function called from invalid context in sta_info_move_state
run #2: crashed: BUG: sleeping function called from invalid context in sta_info_move_state
run #3: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #4: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #5: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #6: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #7: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #8: crashed: kernel BUG at fs/ext4/inline.c:LINE!
run #9: crashed: kernel BUG at fs/ext4/inline.c:LINE!
revisions tested: 2, total time: 27m43.046356171s (build: 10m6.547891064s, test: 17m3.909365812s)
the crash still happens on HEAD
commit msg: Merge tag 'nfsd-5.10-1' of git://linux-nfs.org/~bfields/linux
crash: kernel BUG at fs/ext4/inline.c:LINE!
------------[ cut here ]------------
kernel BUG at fs/ext4/inline.c:751!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 13983 Comm: syz-executor.5 Not tainted 5.10.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ext4_write_inline_data_end+0x1b0/0x220 fs/ext4/inline.c:751
Code: 48 83 c4 30 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 8b 7b 28 89 c1 ba e9 02 00 00 48 c7 c6 50 27 86 83 e8 a4 28 04 00 31 c0 eb c2 <0f> 0b f0 80 a3 1c fd ff ff f7 eb 8f 49 8b 50 08 48 8d 42 ff 83 e2
RSP: 0018:ffffc90005b2fba0 EFLAGS: 00010246
RAX: 0000000c00000000 RBX: ffff88811f85c638 RCX: 0000000000000001
RDX: 0000000080000001 RSI: 0000000000000000 RDI: 00000000ffffffff
RBP: ffffea000471e080 R08: 0000000000000001 R09: 0000000000000001
R10: ffffc90005b2fba0 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: ffff88811f85c358 R15: 0000000000000000
FS:  00007fed5c5fb700(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001188080 CR3: 0000000121e46000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_write_end+0x1d7/0x4d0 fs/ext4/inode.c:1282
 generic_perform_write+0x134/0x1c0 mm/filemap.c:3322
 ext4_buffered_write_iter+0x92/0x140 fs/ext4/file.c:270
 ext4_file_write_iter+0x69/0x6d0 fs/ext4/file.c:664
 call_write_iter include/linux/fs.h:1887 [inline]
 do_iter_readv_writev+0x15b/0x1b0 fs/read_write.c:740
 do_iter_write+0x7e/0x1b0 fs/read_write.c:866
 vfs_writev+0x9e/0x100 fs/read_write.c:939
 do_pwritev+0x87/0xd0 fs/read_write.c:1036
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45de59
Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fed5c5fac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 0000000000026400 RCX: 000000000045de59
RDX: 0000000000000001 RSI: 00000000200014c0 RDI: 0000000000000006
RBP: 000000000118c018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfd4
R13: 00007ffc3dc89d6f R14: 00007fed5c5fb9c0 R15: 000000000118bfd4
Modules linked in:
---[ end trace bd7c315f0c8f9488 ]---
RIP: 0010:ext4_write_inline_data_end+0x1b0/0x220 fs/ext4/inline.c:751
Code: 48 83 c4 30 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 8b 7b 28 89 c1 ba e9 02 00 00 48 c7 c6 50 27 86 83 e8 a4 28 04 00 31 c0 eb c2 <0f> 0b f0 80 a3 1c fd ff ff f7 eb 8f 49 8b 50 08 48 8d 42 ff 83 e2
RSP: 0018:ffffc90005b2fba0 EFLAGS: 00010246
RAX: 0000000c00000000 RBX: ffff88811f85c638 RCX: 0000000000000001
RDX: 0000000080000001 RSI: 0000000000000000 RDI: 00000000ffffffff
RBP: ffffea000471e080 R08: 0000000000000001 R09: 0000000000000001
R10: ffffc90005b2fba0 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: ffff88811f85c358 R15: 0000000000000000
FS:  00007fed5c5fb700(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001590004 CR3: 0000000121e46000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400