sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.4 not setting count and/or reply_len properly ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6234 at lib/iov_iter.c:629 _copy_from_iter+0x2f1/0x1130 Modules linked in: CPU: 1 PID: 6234 Comm: syz-executor.4 Not tainted 6.1.0-next-20221214 #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 ea 3a 37 ff be 79 02 00 00 48 c7 c7 80 c5 9e 84 e8 19 b7 5a ff e9 13 fe ff ff e8 cf 3a 37 ff <0f> 0b 45 31 f6 e9 77 ff ff ff e8 c0 3a 37 ff 31 ff 89 ee e8 87 36 RSP: 0018:ffff8880214075e8 EFLAGS: 00010212 RAX: 000000000000457a RBX: 0000000000000000 RCX: ffffc900071fc000 RDX: 0000000000040000 RSI: ffffffff8211ef01 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000 R13: ffffea00012ab200 R14: 0000000000001000 R15: ffff888021407818 FS: 00007f000af2c700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f287d6f6018 CR3: 000000001862a000 CR4: 0000000000350ee0 Call Trace: 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: 0033:0x7f000d9b6b19 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:00007f000af2c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f000dac9f60 RCX: 00007f000d9b6b19 RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000004 RBP: 00007f000da10f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff39e399df R14: 00007f000af2c300 R15: 0000000000022000 irq event stamp: 5407 hardirqs last enabled at (5445): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (5492): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (1042): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (893): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- loop6: detected capacity change from 0 to 264192 FAT-fs (loop6): invalid media value (0xcc) FAT-fs (loop6): Can't find a valid FAT filesystem loop6: detected capacity change from 0 to 264192 FAT-fs (loop6): Unrecognized mount option "./file0" or missing value loop6: detected capacity change from 0 to 16 EXT4-fs (loop6): failed to parse options in superblock: ¨ EXT4-fs (loop6): fragment/cluster size (65536) != block size (4096) sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.4 not setting count and/or reply_len properly sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 40 00 blk_print_req_error: 50 callbacks suppressed I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 32 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 0, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 1, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 2, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 3 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 3, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 4 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 4, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 5 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 5, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 6 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 6, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 7 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 7, async page read