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: 21359 at lib/iov_iter.c:644 _copy_from_iter+0x2f1/0x1320 Modules linked in: CPU: 1 PID: 21359 Comm: syz-executor.2 Not tainted 6.4.0-rc1-next-20230511 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:_copy_from_iter+0x2f1/0x1320 Code: 92 ff ff 89 c3 e9 1f ff ff ff e8 fa 0b 36 ff be 88 02 00 00 48 c7 c7 e0 d4 9e 84 e8 49 16 5a ff e9 13 fe ff ff e8 df 0b 36 ff <0f> 0b 45 31 f6 e9 67 ff ff ff e8 d0 0b 36 ff 31 ff 89 ee e8 07 07 RSP: 0018:ffff888018217608 EFLAGS: 00010212 RAX: 00000000000023c5 RBX: 0000000000000000 RCX: ffffc90003803000 RDX: 0000000000040000 RSI: ffffffff8215dfc1 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000 R13: ffffea0001189e00 R14: 0000000000001000 R15: ffff888018217838 FS: 00007f04747f9700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c124000 CR3: 0000000048a92000 CR4: 0000000000350ee0 Call Trace: 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+0x2b8/0xd40 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f0477283b19 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:00007f04747f9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0477396f60 RCX: 00007f0477283b19 RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005 RBP: 00007f04772ddf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffec7fb404f R14: 00007f04747f9300 R15: 0000000000022000 irq event stamp: 9513 hardirqs last enabled at (9565): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (9630): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (9466): [] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (9445): [] __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.4 not setting count and/or reply_len properly SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=21379 comm=syz-executor.3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=21377 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=21389 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=21390 comm=syz-executor.0 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=21406 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=21518 comm=syz-executor.3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=21510 comm=syz-executor.2 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=21628 comm=syz-executor.0 No source specified SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=21634 comm=syz-executor.3 No source specified 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 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 No source specified No source specified No source specified No source specified No source specified No source specified syz_tun: entered promiscuous mode syz_tun: left promiscuous mode audit: type=1400 audit(1683804237.921:59): avc: denied { relabelfrom } for pid=22598 comm="syz-executor.1" name="file1" dev="sda" ino=16111 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:mouse_device_t:s0 tclass=file permissive=1