bisecting fixing commit since 6f2f486d57c4d562cdf4932320b66fbb878ab1c4
building syzkaller on 4a77ae0bdc5cd75ebe88ce7c896aae6bbf457a29
testing commit 6f2f486d57c4d562cdf4932320b66fbb878ab1c4 with gcc (GCC) 8.1.0
kernel signature: f60186b6c83f272f50cb41a42cca013b02d30dd863f962bfc28baac1f144fc73
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 a087241716a6cea8518ca33839276a9648d91cef
testing commit a087241716a6cea8518ca33839276a9648d91cef with gcc (GCC) 8.1.0
kernel signature: e360d3c2818486193b330c50ff2e4ee87d8a02e59b8a5f8f2592ffc4e890975c
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: OK
run #8: OK
run #9: OK
revisions tested: 2, total time: 29m13.922877711s (build: 9m52.810626513s, test: 18m40.132810798s)
the crash still happens on HEAD
commit msg: Merge tag 's390-5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
crash: kernel BUG at fs/ext4/inline.c:LINE!
loop5: detected capacity change from 512 to 0
------------[ cut here ]------------
kernel BUG at fs/ext4/inline.c:751!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 6009 Comm: syz-executor.5 Not tainted 5.10.0-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 10 35 a6 83 e8 d4 44 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:ffffc90001d8fb58 EFLAGS: 00010246
RAX: 0000000c00000000 RBX: ffff888112dd66b8 RCX: 0000000000000001
RDX: 0000000080000001 RSI: 0000000000000000 RDI: 00000000ffffffff
RBP: ffffea0004396c00 R08: 0000000000000001 R09: 0000000000000000
R10: ffffc90001d8fb58 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: ffff888112dd63d8 R15: 0000000000000000
FS:  00007fe180fa1700(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd1c0827e0 CR3: 0000000119902003 CR4: 00000000001706f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_write_end+0x1d7/0x460 fs/ext4/inode.c:1282
 generic_perform_write+0x134/0x1c0 mm/filemap.c:3416
 ext4_buffered_write_iter+0x92/0x140 fs/ext4/file.c:270
 ext4_file_write_iter+0x6c/0x820 fs/ext4/file.c:664
 call_write_iter include/linux/fs.h:1901 [inline]
 do_iter_readv_writev+0x15b/0x1b0 fs/read_write.c:740
 do_iter_write+0x7e/0x1b0 fs/read_write.c:866
 vfs_writev+0x99/0x2a0 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:00007fe180fa0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 0000000000026400 RCX: 000000000045de59
RDX: 0000000000000001 RSI: 00000000200014c0 RDI: 0000000000000003
RBP: 000000000118bf70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffc1664a63f R14: 00007fe180fa19c0 R15: 000000000118bf2c
Modules linked in:
---[ end trace a8029e200bb34fd7 ]---
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 10 35 a6 83 e8 d4 44 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:ffffc90001d8fb58 EFLAGS: 00010246
RAX: 0000000c00000000 RBX: ffff888112dd66b8 RCX: 0000000000000001
RDX: 0000000080000001 RSI: 0000000000000000 RDI: 00000000ffffffff
RBP: ffffea0004396c00 R08: 0000000000000001 R09: 0000000000000000
R10: ffffc90001d8fb58 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: ffff888112dd63d8 R15: 0000000000000000
FS:  00007fe180fa1700(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fad6c03c108 CR3: 0000000119902003 CR4: 00000000001706f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400