md: could not open device unknown-block(1,0).
md: invalid raid superblock magic on ram1
md: ram1 does not have a valid v0.90 superblock, not importing!
------------[ cut here ]------------
WARNING: CPU: 1 PID: 10752 at block/bio.c:501 bio_alloc_bioset+0xe10/0x12d0 block/bio.c:501
Modules linked in:
CPU: 1 PID: 10752 Comm: syz.6.812 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:bio_alloc_bioset+0xe10/0x12d0 block/bio.c:501
Code: 89 de 81 e6 bf db f6 ff 81 ce 00 20 09 00 e8 57 80 ca fd 48 85 c0 74 69 49 89 c7 e8 fa d2 72 fd e9 0d f7 ff ff e8 f0 d2 72 fd <0f> 0b e9 58 fa ff ff e8 e4 d2 72 fd e8 8f e4 eb fc e9 ed fb ff ff
RSP: 0018:ffffc9000c237910 EFLAGS: 00010283
RAX: ffffffff8414b860 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc900111c3000 RSI: 0000000000003bbe RDI: 0000000000003bbf
RBP: dffffc0000000000 R08: ffff88801ea74a30 R09: 1ffff1100be0e217
R10: dffffc0000000000 R11: ffffed100be0e218 R12: 0000000000069801
R13: ffff88801ea74a30 R14: 0000000000000001 R15: 0000000000000001
FS:  00007f2917ab46c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3cf260 CR3: 0000000079977000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 md_super_write+0x11c/0x2f0 drivers/md/md.c:963
 md_update_sb+0x1369/0x2310 drivers/md/md.c:2808
 state_store+0xbf8/0x1b10 drivers/md/md.c:3129
 rdev_attr_store+0x27c/0x420 drivers/md/md.c:3645
 kernfs_fop_write_iter+0x3a4/0x520 fs/kernfs/file.c:352
 call_write_iter include/linux/fs.h:2018 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x474/0x9a0 fs/read_write.c:584
 ksys_write+0x151/0x260 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2916b9e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2917ab4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2916e25fa0 RCX: 00007f2916b9e159
RDX: 000000000000000c RSI: 00002000000003c0 RDI: 0000000000000008
RBP: 00007f2916c3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2916e26038 R14: 00007f2916e25fa0 R15: 00007ffc1e5dfa58
 </TASK>