EXT4-fs (loop0): mounted filesystem without journal. Opts: errors=remount-ro,nodiscard,noquota,init_itable,stripe=0x0000000000000079,resgid=0x0000000000000000,sysvgroups,delalloc,usrquota, ext4 filesystem being mounted at /root/syzkaller-testdir1588081837/syzkaller.NMQJhJ/0/file1 supports timestamps until 2038 (0x7fffffff) ------------[ cut here ]------------ kernel BUG at fs/ext4/ext4.h:2984! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 401 Comm: syz-executor.0 Not tainted 5.4.274-syzkaller-00016-gdd432c37afcd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2984 [inline] RIP: 0010:ext4_mb_load_buddy_gfp+0xf29/0xf40 fs/ext4/mballoc.c:1117 Code: ff e8 ab af c9 ff e9 0a f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 52 f3 ff ff e8 b1 af c9 ff e9 48 f3 ff ff e8 57 ca 99 ff <0f> 0b e8 50 ca 99 ff 0f 0b e8 49 ca 99 ff 0f 0b e8 42 ca 99 ff 0f RSP: 0018:ffff8881ee817bc8 EFLAGS: 00010287 RAX: ffffffff81ca71c9 RBX: 0000000000000001 RCX: 0000000000040000 RDX: ffffc90001146000 RSI: 00000000000006ea RDI: 00000000000006eb RBP: ffff8881ef723000 R08: ffffffff81ca6372 R09: ffffed103b2419c0 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1103dee4c7e R13: dffffc0000000000 R14: 000000001f337701 R15: ffff8881ef7263f0 FS: 00007f1158a926c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8bb983cd58 CR3: 00000001ee97d000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_discard_preallocations+0x603/0xb90 fs/ext4/mballoc.c:4128 ext4_punch_hole+0x5f0/0xad0 fs/ext4/inode.c:4482 ext4_fallocate+0x265/0x570 fs/ext4/extents.c:4946 vfs_fallocate+0x551/0x6b0 fs/open.c:309 ksys_fallocate fs/open.c:332 [inline] __do_sys_fallocate fs/open.c:340 [inline] __se_sys_fallocate fs/open.c:338 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:338 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f1159717f69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1158a920c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f115984ef80 RCX: 00007f1159717f69 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00007f11597756fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001a00 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f115984ef80 R15: 00007ffe8b629398 Modules linked in: ---[ end trace 4041931486527bc9 ]--- RIP: 0010:ext4_get_group_info fs/ext4/ext4.h:2984 [inline] RIP: 0010:ext4_mb_load_buddy_gfp+0xf29/0xf40 fs/ext4/mballoc.c:1117 Code: ff e8 ab af c9 ff e9 0a f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 52 f3 ff ff e8 b1 af c9 ff e9 48 f3 ff ff e8 57 ca 99 ff <0f> 0b e8 50 ca 99 ff 0f 0b e8 49 ca 99 ff 0f 0b e8 42 ca 99 ff 0f RSP: 0018:ffff8881ee817bc8 EFLAGS: 00010287 RAX: ffffffff81ca71c9 RBX: 0000000000000001 RCX: 0000000000040000 RDX: ffffc90001146000 RSI: 00000000000006ea RDI: 00000000000006eb RBP: ffff8881ef723000 R08: ffffffff81ca6372 R09: ffffed103b2419c0