sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.5 not setting count and/or reply_len properly ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4546 at lib/iov_iter.c:376 _copy_from_iter+0x2b2/0x1140 Modules linked in: CPU: 0 PID: 4546 Comm: syz-executor.5 Not tainted 6.3.0-rc3-next-20230327 #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 52 46 34 02 e8 a9 89 36 ff be 7c 01 00 00 48 c7 c7 60 c4 9e 84 e8 d8 7e 5a ff e9 51 fe ff ff e8 8e 89 36 ff <0f> 0b 45 31 f6 eb 87 e8 82 89 36 ff 31 ff 89 ee e8 b9 84 36 ff 40 RSP: 0018:ffff888042267608 EFLAGS: 00010212 RAX: 000000000000425f RBX: 0000000000000000 RCX: ffffc90003411000 RDX: 0000000000040000 RSI: ffffffff8214ff52 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000 R13: ffff888042267838 R14: 0000000000001000 R15: ffff888042267838 FS: 00007f3a4153d700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f878036baf0 CR3: 000000001ca84000 CR4: 0000000000350ef0 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: 0033:0x7f3a43fc7b19 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:00007f3a4153d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f3a440daf60 RCX: 00007f3a43fc7b19 RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005 RBP: 00007f3a44021f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd242941f R14: 00007f3a4153d300 R15: 0000000000022000 irq event stamp: 3369 hardirqs last enabled at (3393): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (3418): [] __up_console_sem+0x5d/0x80 softirqs last enabled at (2092): [] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (1933): [] __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.5 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.0 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.6 not setting count and/or reply_len properly loop1: detected capacity change from 0 to 256 loop1: detected capacity change from 0 to 256 loop1: detected capacity change from 0 to 256 loop1: detected capacity change from 0 to 256 loop7: detected capacity change from 0 to 256 loop1: detected capacity change from 0 to 256 loop7: detected capacity change from 0 to 256 loop7: detected capacity change from 0 to 256 loop1: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 40 loop0: detected capacity change from 0 to 40 loop4: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 40 perf: interrupt took too long (2533 > 2500), lowering kernel.perf_event_max_sample_rate to 78000 9pnet: Could not find request transport: rdma loop0: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 40 9pnet: Could not find request transport: rdma loop4: detected capacity change from 0 to 40 perf: interrupt took too long (3189 > 3166), lowering kernel.perf_event_max_sample_rate to 62000 9pnet: Could not find request transport: rdma loop0: detected capacity change from 0 to 40 perf: interrupt took too long (3989 > 3986), lowering kernel.perf_event_max_sample_rate to 50000 EXT4-fs warning (device sda): verify_group_input:150: Cannot add at group 0 (only 16 groups) SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pid=4898 comm=syz-executor.7 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=45 sclass=netlink_tcpdiag_socket pid=4898 comm=syz-executor.7 EXT4-fs warning (device sda): verify_group_input:150: Cannot add at group 0 (only 16 groups) loop4: detected capacity change from 0 to 40 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pid=4898 comm=syz-executor.7 9pnet: Could not find request transport: rdma SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pid=4920 comm=syz-executor.7 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=45 sclass=netlink_tcpdiag_socket pid=4920 comm=syz-executor.7 9pnet: Could not find request transport: rdma SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pid=4937 comm=syz-executor.7 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=45 sclass=netlink_tcpdiag_socket pid=4937 comm=syz-executor.7 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pid=4973 comm=syz-executor.7 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=45 sclass=netlink_tcpdiag_socket pid=4973 comm=syz-executor.7 lo: entered promiscuous mode lo: entered allmulticast mode lo: left promiscuous mode lo: left allmulticast mode lo: entered promiscuous mode lo: entered allmulticast mode lo: entered promiscuous mode lo: entered allmulticast mode lo: left promiscuous mode lo: left allmulticast mode lo: left promiscuous mode lo: left allmulticast mode lo: entered promiscuous mode lo: entered allmulticast mode lo: entered promiscuous mode lo: entered allmulticast mode lo: left promiscuous mode lo: left allmulticast mode loop3: detected capacity change from 0 to 592 lo: left promiscuous mode lo: left allmulticast mode lo: entered promiscuous mode lo: entered allmulticast mode lo: entered promiscuous mode lo: entered allmulticast mode