bisecting fixing commit since 21ad423fe5210f5aa50bd43f9ae99b655090a227
building syzkaller on 0b33604d8e2793b82ec89abecf82d92b82e3d410
testing commit 21ad423fe5210f5aa50bd43f9ae99b655090a227
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 41c5e6e115a6a1122f3fb672eb5128e31e4da9f48d25cd9f9387e54e8f57b073
run #0: crashed: unregister_netdevice: waiting for DEV to become free
run #1: crashed: unregister_netdevice: waiting for DEV to become free
run #2: crashed: unregister_netdevice: waiting for DEV to become free
run #3: crashed: unregister_netdevice: waiting for DEV to become free
run #4: crashed: kernel BUG in ext4_ind_remove_space
run #5: crashed: unregister_netdevice: waiting for DEV to become free
run #6: crashed: kernel BUG in ext4_ind_remove_space
run #7: crashed: unregister_netdevice: waiting for DEV to become free
run #8: crashed: unregister_netdevice: waiting for DEV to become free
run #9: crashed: unregister_netdevice: waiting for DEV to become free
run #10: crashed: unregister_netdevice: waiting for DEV to become free
run #11: crashed: kernel BUG in ext4_ind_remove_space
run #12: crashed: unregister_netdevice: waiting for DEV to become free
run #13: crashed: unregister_netdevice: waiting for DEV to become free
run #14: crashed: unregister_netdevice: waiting for DEV to become free
run #15: crashed: unregister_netdevice: waiting for DEV to become free
run #16: crashed: unregister_netdevice: waiting for DEV to become free
run #17: crashed: unregister_netdevice: waiting for DEV to become free
run #18: crashed: unregister_netdevice: waiting for DEV to become free
run #19: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD af48f51cb5934738a3ee97e951d7dededf029488
testing commit af48f51cb5934738a3ee97e951d7dededf029488
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4227ee8ca817182bf8aabc22e45890d4193ef60092d17ff07a41dbc739e761f8
run #0: crashed: kernel BUG in ext4_ind_remove_space
run #1: crashed: unregister_netdevice: waiting for DEV to become free
run #2: crashed: kernel BUG in ext4_ind_remove_space
run #3: crashed: unregister_netdevice: waiting for DEV to become free
run #4: crashed: unregister_netdevice: waiting for DEV to become free
run #5: crashed: unregister_netdevice: waiting for DEV to become free
run #6: crashed: kernel BUG in ext4_ind_remove_space
run #7: crashed: unregister_netdevice: waiting for DEV to become free
run #8: crashed: unregister_netdevice: waiting for DEV to become free
run #9: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m49.100523426s (build: 15m44.183020048s, test: 6m37.142948478s)
the crash still happens on HEAD
commit msg: Linux 4.14.271
crash: unregister_netdevice: waiting for DEV to become free
IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
syz-executor.0 (7955) used greatest stack depth: 24264 bytes left
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
audit: type=1800 audit(1647018918.663:2): pid=8289 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor235" name="bus" dev="sda1" ino=13876 res=0
EXT4-fs warning (device sda1): ext4_block_to_path:107: block 1074791436 > max in inode 13876
------------[ cut here ]------------
kernel BUG at fs/ext4/indirect.c:1236!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 8289 Comm: syz-executor235 Not tainted 4.14.271-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880ab196600 task.stack: ffff8880ab080000
RIP: 0010:ext4_ind_remove_space+0xe9f/0x1570 fs/ext4/indirect.c:1236
RSP: 0018:ffff8880ab087a58 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff878b9920 RDI: ffffed1015610f17
RBP: ffff8880ab087d18 R08: ffff8880ab196f20 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000000 R12: ffff8880ab087b70
R13: 000000004010040c R14: 0000000000001000 R15: ffff88808a57d4f0
FS:  0000555556610300(0000) GS:ffff8880ba700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000084 CR3: 00000000aa890000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_punch_hole+0xd55/0x1040 fs/ext4/inode.c:4318
 ext4_fallocate+0x292/0x19f0 fs/ext4/extents.c:4968
 vfs_fallocate+0x2ba/0x770 fs/open.c:319
 SYSC_fallocate fs/open.c:342 [inline]
 SyS_fallocate+0x3f/0x60 fs/open.c:336
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7ff95c08dc09
RSP: 002b:00007ffe305d57c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff95c08dc09
RDX: 0000000001000000 RSI: 0000000000000003 RDI: 0000000000000005
RBP: 00007ff95c051db0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000ffeffeff000 R11: 0000000000000246 R12: 00007ff95c051e40
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Code: 89 95 a0 fd ff ff 48 89 85 b0 fd ff ff e8 6a 15 c6 ff 4c 8b 8d 90 fd ff ff 8b 95 a0 fd ff ff 48 8b 85 b0 fd ff ff e9 eb f2 ff ff <0f> 0b 4c 3b bd b0 fd ff ff 0f 84 ad 00 00 00 48 8b 9d 90 fd ff 
RIP: ext4_ind_remove_space+0xe9f/0x1570 fs/ext4/indirect.c:1236 RSP: ffff8880ab087a58
---[ end trace 4863973828e49c97 ]---