loop7: detected capacity change from 0 to 40 sg_write: data in/out 912/1 bytes for SCSI command 0x10-- guessing data in; program syz-executor.3 not setting count and/or reply_len properly ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8946 at lib/iov_iter.c:629 _copy_from_iter+0x2f1/0x1130 Modules linked in: CPU: 0 PID: 8946 Comm: syz-executor.3 Not tainted 6.1.0-next-20221219 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:_copy_from_iter+0x2f1/0x1130 Code: 37 ff 44 89 f3 e9 2f ff ff ff e8 7a 13 37 ff be 79 02 00 00 48 c7 c7 80 c8 9e 84 e8 99 91 5a ff e9 13 fe ff ff e8 5f 13 37 ff <0f> 0b 45 31 f6 e9 77 ff ff ff e8 50 13 37 ff 31 ff 89 ee e8 17 0f RSP: 0018:ffff888008e375e8 EFLAGS: 00010216 RAX: 000000000000178f RBX: 0000000000000000 RCX: ffffc90005df2000 RDX: 0000000000040000 RSI: ffffffff82121a51 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000390 R13: ffffea000119d200 R14: 0000000000000390 R15: ffff888008e37818 FS: 00007f847fbba700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f847fbb9d58 CR3: 00000000474b2000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: <TASK> copy_page_from_iter+0xe3/0x180 blk_rq_map_user_iov+0xb0c/0x1650 blk_rq_map_user_io+0x1ee/0x220 sg_common_write.constprop.0+0xd84/0x15e0 sg_write.part.0+0x706/0xb20 sg_write+0x88/0xe0 vfs_write+0x358/0xe40 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f8482665b19 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:00007f847fbba188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f8482779020 RCX: 00007f8482665b19 RDX: 000000000000002b RSI: 0000000020000380 RDI: 0000000000000007 RBP: 00007f84826bff6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffca50d24f R14: 00007f847fbba300 R15: 0000000000022000 </TASK> irq event stamp: 1589 hardirqs last enabled at (1599): [<ffffffff812e05a8>] __up_console_sem+0x78/0x80 hardirqs last disabled at (1610): [<ffffffff812e058d>] __up_console_sem+0x5d/0x80 softirqs last enabled at (882): [<ffffffff81182e7b>] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (811): [<ffffffff81182e7b>] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]---