bisecting fixing commit since 614cb2751d3150850d459bee596c397f344a7936
building syzkaller on a2fe1cb58994e43fb14f141ecd6e6dcce9bb697a
testing commit 614cb2751d3150850d459bee596c397f344a7936
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: a3a85bce4f45999e30949326e2fab7cc4578e19f6b96ef7dbd2ad10521d11990
all runs: crashed: kernel BUG in ext4_get_group_info
testing current HEAD 59250f8a7f3a60a2661b84cbafc1e0eb5d05ec9b
testing commit 59250f8a7f3a60a2661b84cbafc1e0eb5d05ec9b
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 73143b8924697ecba3de88d9d737a8e00728737f577d1b450c129742a068be18
all runs: crashed: kernel BUG in ext4_get_group_info
revisions tested: 2, total time: 19m45.217644332s (build: 12m2.935603558s, test: 6m51.842137157s)
the crash still happens on HEAD
commit msg: Merge branch 'akpm' (patches from Andrew)
crash: kernel BUG in ext4_get_group_info
EXT4-fs error (device loop0): ext4_ext_map_blocks:4112: inode #17: comm syz-executor.0: bad extent address lblock: 216, depth: 1 pblock 0
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4.h:3366!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5313 Comm: syz-executor.0 Not tainted 5.18.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ext4_get_group_info+0x280/0x2e0 fs/ext4/ext4.h:3366
Code: 0f 85 a8 fe ff ff 48 c7 c2 60 1b 00 89 be b7 02 00 00 48 c7 c7 c0 1b 00 89 c6 05 f4 70 97 0a 01 e8 8c 45 4e 06 e9 84 fe ff ff <0f> 0b e8 69 be b2 ff e9 d4 fd ff ff e8 5f be b2 ff e9 fc fd ff ff
RSP: 0018:ffffc9000b3df5c8 EFLAGS: 00010213
RAX: 0000000000000000 RBX: ffff88801d41a000 RCX: 0000000000000001
RDX: 1ffff11003a83408 RSI: 00000000fffff95a RDI: ffff88801d41a040
RBP: ffff88801d41c000 R08: 0000000000000000 R09: ffff888062b887b3
R10: ffffed100c5710f6 R11: 000000000000005c R12: 00000000fffff95a
R13: ffff88801d41c678 R14: 00000000fffff95a R15: 00000000fffff95a
FS:  00007f04d0048700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f869a23ffe8 CR3: 0000000022789000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_mb_load_buddy_gfp+0xc4/0xf50 fs/ext4/mballoc.c:1494
 ext4_discard_preallocations+0x819/0xe40 fs/ext4/mballoc.c:5030
 ext4_truncate+0x4c5/0x10c0 fs/ext4/inode.c:4221
 ext4_truncate_failed_write fs/ext4/truncate.h:22 [inline]
 ext4_write_begin+0x7a1/0xc50 fs/ext4/inode.c:1235
 ext4_da_write_begin+0x46b/0x880 fs/ext4/inode.c:2950
 generic_perform_write+0x209/0x490 mm/filemap.c:3787
 ext4_buffered_write_iter+0x122/0x2c0 fs/ext4/file.c:270
 ext4_file_write_iter+0x39d/0x1190 fs/ext4/file.c:679
 call_write_iter include/linux/fs.h:2050 [inline]
 new_sync_write+0x2e0/0x520 fs/read_write.c:504
 vfs_write+0x607/0x8f0 fs/read_write.c:591
 ksys_write+0xee/0x1c0 fs/read_write.c:644
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
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:00007f04d0048188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 000000000d4ba0ff RSI: 00000000200009c0 RDI: 0000000000000007
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffc76962c6f R14: 00007f04d0048300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_get_group_info+0x280/0x2e0 fs/ext4/ext4.h:3366
Code: 0f 85 a8 fe ff ff 48 c7 c2 60 1b 00 89 be b7 02 00 00 48 c7 c7 c0 1b 00 89 c6 05 f4 70 97 0a 01 e8 8c 45 4e 06 e9 84 fe ff ff <0f> 0b e8 69 be b2 ff e9 d4 fd ff ff e8 5f be b2 ff e9 fc fd ff ff
RSP: 0018:ffffc9000b3df5c8 EFLAGS: 00010213
RAX: 0000000000000000 RBX: ffff88801d41a000 RCX: 0000000000000001
RDX: 1ffff11003a83408 RSI: 00000000fffff95a RDI: ffff88801d41a040
RBP: ffff88801d41c000 R08: 0000000000000000 R09: ffff888062b887b3
R10: ffffed100c5710f6 R11: 000000000000005c R12: 00000000fffff95a
R13: ffff88801d41c678 R14: 00000000fffff95a R15: 00000000fffff95a
FS:  00007f04d0048700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000022789000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400