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 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4591 at lib/iov_iter.c:644 _copy_from_iter+0x2f1/0x1330 Modules linked in: CPU: 1 PID: 4591 Comm: syz-executor.0 Not tainted 6.3.0-next-20230426 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:_copy_from_iter+0x2f1/0x1330 Code: 36 ff 44 89 f3 e9 2f ff ff ff e8 8a 1f 36 ff be 88 02 00 00 48 c7 c7 c0 da 9e 84 e8 99 15 5a ff e9 13 fe ff ff e8 6f 1f 36 ff <0f> 0b 45 31 f6 e9 77 ff ff ff e8 60 1f 36 ff 31 ff 89 ee e8 97 1a RSP: 0018:ffff888044d7f608 EFLAGS: 00010212 RAX: 0000000000004702 RBX: 0000000000000000 RCX: ffffc90000bd5000 RDX: 0000000000040000 RSI: ffffffff8215de41 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000 R13: ffffea00010ba600 R14: 0000000000001000 R15: ffff888044d7f838 FS: 00007f157bb25700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31a22000 CR3: 000000003768a000 CR4: 0000000000350ee0 Call Trace: copy_page_from_iter+0xe3/0x180 blk_rq_map_user_iov+0xb39/0x16c0 blk_rq_map_user_io+0x1d1/0x200 Invalid option length (497) for dns_resolver key 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: 0033:0x7f157e5afb19 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:00007f157bb25188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f157e6c2f60 RCX: 00007f157e5afb19 RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005 RBP: 00007f157e609f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff6ac7fe2f R14: 00007f157bb25300 R15: 0000000000022000 irq event stamp: 4069 hardirqs last enabled at (4099): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (4130): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (1542): [] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (1475): [] __irq_exit_rcu+0xcc/0x110 ---[ end trace 0000000000000000 ]--- Invalid option length (497) for dns_resolver key SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=4604 comm=syz-executor.0 audit: type=1400 audit(1682626118.986:10): avc: denied { read } for pid=4587 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 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.0 not setting count and/or reply_len properly SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=4617 comm=syz-executor.0 loop1: detected capacity change from 0 to 40 loop3: detected capacity change from 0 to 40 syz-executor.3: attempt to access beyond end of device loop3: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop3, logical block 10, lost async page write syz-executor.3: attempt to access beyond end of device loop3: rw=2049, sector=44, nr_sectors = 8 limit=40 loop2: detected capacity change from 0 to 264192 EXT4-fs (loop2): VFS: Can't find ext4 filesystem loop2: detected capacity change from 0 to 264192 EXT4-fs (loop2): VFS: Can't find ext4 filesystem