bisecting cause commit starting from 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/buffer.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: crashed: kernel BUG at fs/ext4/inline.c:LINE!
testing release v5.8
testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.1.0
kernel signature: c8e76bd576d17a3da7d4c04675d695d50c50a29d2841a6f17b484f81b639c306
all runs: crashed: kernel BUG at fs/ext4/inline.c:LINE!
testing release v5.7
testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.1.0
kernel signature: 6c79a1274846e1dd35e051f11e5da60649d2f713717c461e4116c55f65b7924c
all runs: crashed: kernel BUG at fs/ext4/inline.c:LINE!
testing release v5.6
testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.1.0
kernel signature: 31cb6ec86e01e8d2d4c6c243fb9d4b5e3a51b51fb0a78db6365b00d2381e9dc2
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: OK
run #9: OK
testing release v5.5
testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 with gcc (GCC) 8.1.0
kernel signature: ee6d31c410c6a9c95c364337774192866a3f8e6eb95d2e0a8e905e81ddddb9a3
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
testing release v5.4
testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.1.0
kernel signature: c884ac6ac81875c7ea10781f22397d722e91708db5eed37129946e0cfe28bc72
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 release v5.3
testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0
kernel signature: 65d2cbf91e25155d7a7b2b15f0c9e9a7fd39b232e78d8edb58ea3e8cc3e3d4c3
all runs: crashed: kernel BUG at fs/ext4/inline.c:LINE!
testing release v5.2
testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0
kernel signature: acfbe3f2a17e328a185a3e5d3df112e857a8808e3bd5bf95db1a2be729f32f18
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/buffer.c:LINE!
run #9: OK
testing release v5.1
testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0
kernel signature: 73d1766980e639fa5d0a5b0cd6b21ba7d56f30b781ea31ce17e077b6c18918f2
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 release v5.0
testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0
kernel signature: d40f7b5b06a0e44d9d5e451d2b2e184d5566e2d3b8a42a1bf54cdeafa1f9ba4c
all runs: crashed: kernel BUG at fs/ext4/inline.c:LINE!
testing release v4.20
testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0
certs/signing_key.pem: Permission denied
testing release v4.19
testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.1.0
certs/signing_key.pem: Permission denied
testing release v4.18
testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.1.0
certs/signing_key.pem: Permission denied
testing release v4.17
testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.1.0
certs/signing_key.pem: Permission denied
testing release v4.16
testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.1.0
certs/signing_key.pem: Permission denied
testing release v4.15
testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.1.0
certs/signing_key.pem: Permission denied
testing release v4.14
testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0
certs/signing_key.pem: Permission denied
testing release v4.13
testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0
certs/signing_key.pem: Permission denied
testing release v4.12
testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0
certs/signing_key.pem: Permission denied
testing release v4.11
testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.3.0
certs/signing_key.pem: Permission denied
testing release v4.10
testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0
certs/signing_key.pem: Permission denied
testing release v4.9
testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0
certs/signing_key.pem: Permission denied
testing release v4.8
testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0
certs/signing_key.pem: Permission denied
testing release v4.7
testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0
certs/signing_key.pem: Permission denied
testing release v4.6
testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0
certs/signing_key.pem: Permission denied
revisions tested: 25, total time: 2h50m58.856607435s (build: 1h24m31.375007178s, test: 1h22m54.272561261s)
the crash already happened on the oldest tested release
commit msg: Linux 5.0
crash: kernel BUG at fs/ext4/inline.c:LINE!
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
NOHZ: local_softirq_pending 08
EXT4-fs: failed to create workqueue
EXT4-fs (loop1): mount failed
------------[ cut here ]------------
kernel BUG at fs/ext4/inline.c:751!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 26649 Comm: syz-executor.2 Not tainted 5.0.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ext4_write_inline_data_end+0x398/0x530 fs/ext4/inline.c:751
Code: f9 48 c1 e9 03 80 3c 11 00 0f 85 5e 01 00 00 48 8b 7b 28 89 c1 ba e9 02 00 00 48 c7 c6 c0 6e 78 87 e8 7c 7c 0d 00 31 c0 eb 8e <0f> 0b 49 8d 78 08 48 89 f8 48 c1 e8 03 80 3c 10 00 0f 85 5c 01 00
RSP: 0018:ffff888089f7f628 EFLAGS: 00010246
RAX: 0000000c00000000 RBX: ffff88807535c970 RCX: 1ffff1100ea6b8fa
RDX: dffffc0000000000 RSI: 0000000400000000 RDI: ffff88807535c830
RBP: ffff888089f7f6d8 R08: 0000000000000144 R09: ffffffff8a0995a0
R10: ffff8880a56eb010 R11: 0000000000000001 R12: ffffea0001c4a680
R13: 1ffff110113efeca R14: ffff888089f7f670 R15: ffff888089f7f6b0
FS:  00007f4f98ed1700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f98eafdb8 CR3: 0000000096d0d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_write_end+0x167/0xae0 fs/ext4/inode.c:1396
 ext4_da_write_end+0x5f3/0x970 fs/ext4/inode.c:3173
 generic_perform_write+0x2e3/0x480 mm/filemap.c:3219
 __generic_file_write_iter+0x201/0x580 mm/filemap.c:3333
 ext4_file_write_iter+0x295/0xfe0 fs/ext4/file.c:266
 call_write_iter include/linux/fs.h:1863 [inline]
 do_iter_readv_writev+0x512/0xa50 fs/read_write.c:680
 do_iter_write+0x12a/0x510 fs/read_write.c:956
 vfs_writev+0x125/0x2d0 fs/read_write.c:1001
 do_pwritev+0x158/0x230 fs/read_write.c:1090
 __do_sys_pwritev fs/read_write.c:1137 [inline]
 __se_sys_pwritev fs/read_write.c:1132 [inline]
 __x64_sys_pwritev+0x95/0xf0 fs/read_write.c:1132
 do_syscall_64+0xd0/0x4d0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
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:00007f4f98ed0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 0000000000026400 RCX: 000000000045de59
RDX: 0000000000000001 RSI: 00000000200014c0 RDI: 0000000000000005
RBP: 000000000118c018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bfd4
R13: 00007ffdc108a38f R14: 00007f4f98ed19c0 R15: 000000000118bfd4
Modules linked in:
---[ end trace 2c3a2e2dee15d94a ]---
RIP: 0010:ext4_write_inline_data_end+0x398/0x530 fs/ext4/inline.c:751
Code: f9 48 c1 e9 03 80 3c 11 00 0f 85 5e 01 00 00 48 8b 7b 28 89 c1 ba e9 02 00 00 48 c7 c6 c0 6e 78 87 e8 7c 7c 0d 00 31 c0 eb 8e <0f> 0b 49 8d 78 08 48 89 f8 48 c1 e8 03 80 3c 10 00 0f 85 5c 01 00
RSP: 0018:ffff888089f7f628 EFLAGS: 00010246
RAX: 0000000c00000000 RBX: ffff88807535c970 RCX: 1ffff1100ea6b8fa
RDX: dffffc0000000000 RSI: 0000000400000000 RDI: ffff88807535c830
RBP: ffff888089f7f6d8 R08: 0000000000000144 R09: ffffffff8a0995a0
R10: ffff8880a56eb010 R11: 0000000000000001 R12: ffffea0001c4a680
R13: 1ffff110113efeca R14: ffff888089f7f670 R15: ffff888089f7f6b0
FS:  00007f4f98ed1700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd7cd11e9c CR3: 0000000096d0d000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400