sr 1:0:0:0: [sr0] tag#0 unaligned transfer 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: 1 PID: 5382 at lib/iov_iter.c:644 _copy_from_iter+0x2f1/0x1330 Modules linked in: CPU: 1 PID: 5382 Comm: syz-executor.5 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:ffff8880158ef608 EFLAGS: 00010206 RAX: 0000000000003810 RBX: 0000000000000000 RCX: ffffc900019e0000 RDX: 0000000000040000 RSI: ffffffff8215de41 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000 R13: ffffea0000fbb200 R14: 0000000000001000 R15: ffff8880158ef838 FS: 00007fbeca7c1700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9eeda0000 CR3: 000000000caa6000 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+0x2d8/0xdd0 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fbecd24bb19 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:00007fbeca7c1188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fbecd35ef60 RCX: 00007fbecd24bb19 RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005 RBP: 00007fbecd2a5f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe6abb846f R14: 00007fbeca7c1300 R15: 0000000000022000 irq event stamp: 3719 hardirqs last enabled at (3747): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (3774): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (954): [] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (665): [] __irq_exit_rcu+0xcc/0x110 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1682560536.442:12): avc: denied { read } for pid=5381 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. 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 EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5411 comm=syz-executor.5 loop7: detected capacity change from 0 to 512 loop3: detected capacity change from 0 to 40 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop3: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 184 loop3: detected capacity change from 0 to 40 loop0: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 184 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5449 comm=syz-executor.5 loop1: detected capacity change from 0 to 184 loop0: detected capacity change from 0 to 40 loop3: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 184 loop0: detected capacity change from 0 to 40 sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.1 not setting count and/or reply_len properly SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5477 comm=syz-executor.1 loop3: detected capacity change from 0 to 184 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5487 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5486 comm=syz-executor.0 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 loop3: detected capacity change from 0 to 184 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5490 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5495 comm=syz-executor.1 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5501 comm=syz-executor.2 loop3: detected capacity change from 0 to 184 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5512 comm=syz-executor.1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=61 sclass=netlink_route_socket pid=5513 comm=syz-executor.0 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.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.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.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.1 not setting count and/or reply_len properly audit: type=1400 audit(1682560541.145:13): avc: denied { relabelto } for pid=5549 comm="syz-executor.4" name="RAW" dev="sockfs" ino=19151 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmp_t:s0 tclass=rawip_socket permissive=1 sg_write: 2 callbacks suppressed sg_write: data in/out 917468/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.1 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.3 not setting count and/or reply_len properly loop4: detected capacity change from 0 to 40 audit: type=1400 audit(1682560544.249:14): avc: denied { write } for pid=5770 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 buffer_io_error: 134 callbacks suppressed Buffer I/O error on dev loop4, logical block 10, lost async page write loop4: detected capacity change from 0 to 40 syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop4, logical block 10, lost async page write syz-executor.0 (5780) used greatest stack depth: 23448 bytes left loop4: detected capacity change from 0 to 40 syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop4, logical block 10, lost async page write loop4: detected capacity change from 0 to 40 loop5: detected capacity change from 0 to 40 syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop4, logical block 10, lost async page write syz-executor.5: attempt to access beyond end of device loop5: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop5, logical block 10, lost async page write loop5: detected capacity change from 0 to 40 syz-executor.5: attempt to access beyond end of device loop5: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop5, logical block 10, lost async page write