sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.7 not setting count and/or reply_len properly ------------[ cut here ]------------ WARNING: CPU: 1 PID: 44569 at lib/iov_iter.c:376 _copy_from_iter+0x2bf/0x1200 Modules linked in: CPU: 1 PID: 44569 Comm: syz-executor.7 Not tainted 6.3.0-rc5-next-20230406 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:_copy_from_iter+0x2bf/0x1200 Code: 5d 41 5e 41 5f e9 85 25 35 02 e8 bc 68 36 ff be 7c 01 00 00 48 c7 c7 20 ce 9e 84 e8 0b 74 5a ff e9 48 fe ff ff e8 a1 68 36 ff <0f> 0b 45 31 f6 eb 87 e8 95 68 36 ff 31 ff 89 ee e8 cc 63 36 ff 40 RSP: 0018:ffff888047edf608 EFLAGS: 00010212 RAX: 0000000000004765 RBX: 0000000000000000 RCX: ffffc90009320000 RDX: 0000000000040000 RSI: ffffffff82154e9f RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888047edf838 R13: ffffea0000aa9a00 R14: 0000000000001000 R15: ffff888047edf838 FS: 00007fde9c573700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd8202a0019 CR3: 0000000048cc2000 CR4: 0000000000350ee0 Call Trace: <TASK> copy_page_from_iter+0xe3/0x180 blk_rq_map_user_iov+0xb39/0x16c0 blk_rq_map_user_io+0x1d1/0x200 sg_common_write.constprop.0+0xd8d/0x15f0 sg_write.part.0+0x698/0xac0 sg_write+0x8d/0xe0 vfs_write+0x2d8/0xdc0 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fde9effdb19 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:00007fde9c573188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fde9f110f60 RCX: 00007fde9effdb19 RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005 RBP: 00007fde9f057f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce5cfa03f R14: 00007fde9c573300 R15: 0000000000022000 </TASK> irq event stamp: 2775 hardirqs last enabled at (2785): [<ffffffff812fb878>] __up_console_sem+0x78/0x80 hardirqs last disabled at (2802): [<ffffffff84481e2f>] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (2066): [<ffffffff8118db0c>] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (1989): [<ffffffff8118db0c>] __irq_exit_rcu+0xcc/0x110 ---[ end trace 0000000000000000 ]--- sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.7 not setting count and/or reply_len properly sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.7 not setting count and/or reply_len properly warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow lo: entered promiscuous mode lo: entered allmulticast mode warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow EXT4-fs (sda): can't enable nombcache during remount EXT4-fs (sda): can't enable nombcache during remount EXT4-fs (sda): can't enable nombcache during remount EXT4-fs (sda): can't enable nombcache during remount lo: left promiscuous mode lo: left allmulticast mode