loop5: detected capacity change from 0 to 16383 sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.2 not setting count and/or reply_len properly ------------[ cut here ]------------ WARNING: CPU: 1 PID: 9188 at lib/iov_iter.c:376 _copy_from_iter+0x2b2/0x1140 Modules linked in: CPU: 1 PID: 9188 Comm: syz-executor.2 Not tainted 6.3.0-rc3-next-20230324 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:_copy_from_iter+0x2b2/0x1140 Code: 5d 41 5e 41 5f e9 82 ce 33 02 e8 19 91 36 ff be 7c 01 00 00 48 c7 c7 e0 c4 9e 84 e8 48 86 5a ff e9 51 fe ff ff e8 fe 90 36 ff <0f> 0b 45 31 f6 eb 87 e8 f2 90 36 ff 31 ff 89 ee e8 29 8c 36 ff 40 RSP: 0018:ffff8880449bf608 EFLAGS: 00010212 RAX: 00000000000041b4 RBX: 0000000000000000 RCX: ffffc9000380b000 RDX: 0000000000040000 RSI: ffffffff8214f722 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000 R13: ffff8880449bf838 R14: 0000000000001000 R15: ffff8880449bf838 FS: 00007f14ee6ee700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c226000 CR3: 000000001d1d4000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: copy_page_from_iter+0xe3/0x180 blk_rq_map_user_iov+0xb41/0x16c0 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+0x2d8/0xdd0 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f14f1178b19 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:00007f14ee6ee188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f14f128bf60 RCX: 00007f14f1178b19 RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005 RBP: 00007f14f11d2f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc47091a5f R14: 00007f14ee6ee300 R15: 0000000000022000 irq event stamp: 5241 hardirqs last enabled at (5253): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (5296): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (4768): [] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (4685): [] __irq_exit_rcu+0xcc/0x110 ---[ end trace 0000000000000000 ]--- loop5: detected capacity change from 0 to 16383