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 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5115 at lib/iov_iter.c:385 _copy_from_iter+0x2f1/0x1320 Modules linked in: CPU: 1 PID: 5115 Comm: syz-executor.6 Not tainted 6.4.0-rc3-next-20230525 #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: b2 ff ff 89 c3 e9 1f ff ff ff e8 5a e4 35 ff be 85 01 00 00 48 c7 c7 c0 e6 9e 84 e8 b9 36 5a ff e9 13 fe ff ff e8 3f e4 35 ff <0f> 0b 45 31 f6 e9 67 ff ff ff e8 30 e4 35 ff 31 ff 89 ee e8 67 df RSP: 0018:ffff888043e3f608 EFLAGS: 00010216 RAX: 000000000000475b RBX: 0000000000000000 RCX: ffffc9000e83b000 RDX: 0000000000040000 RSI: ffffffff821618b1 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8180f6c5 R12: 0000000000001000 R13: ffffea0000f51e00 R14: 0000000000001000 R15: ffff888043e3f838 FS: 00007f9f82d18700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f21ab385710 CR3: 000000000f06c000 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: 0033:0x7f9f857a2b19 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:00007f9f82d18188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f9f858b5f60 RCX: 00007f9f857a2b19 RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005 RBP: 00007f9f857fcf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdb980c68f R14: 00007f9f82d18300 R15: 0000000000022000 irq event stamp: 6437 hardirqs last enabled at (6465): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (6490): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (5390): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (5291): [] irq_exit_rcu+0x93/0xc0 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1685286286.685:18): avc: denied { read } for pid=5112 comm="syz-executor.6" 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.6 not setting count and/or reply_len properly SELinux: unrecognized netlink message: protocol=0 nlmsg_type=55 sclass=netlink_route_socket pid=5105 comm=syz-executor.7 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=55 sclass=netlink_route_socket pid=5120 comm=syz-executor.7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=51 sclass=netlink_route_socket pid=5134 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=51 sclass=netlink_route_socket pid=5135 comm=syz-executor.0 loop7: detected capacity change from 0 to 40 kworker/u4:3: attempt to access beyond end of device loop7: rw=1, sector=124, nr_sectors = 4 limit=40 buffer_io_error: 70 callbacks suppressed Buffer I/O error on dev loop7, logical block 31, lost async page write netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. loop1: detected capacity change from 0 to 264192 FAT-fs (loop1): Unrecognized mount option "fmaâk=00èÔx60000000000ƒTg>ò÷‡" or missing value loop1: detected capacity change from 0 to 264192 FAT-fs (loop1): Unrecognized mount option "fmaâk=00èÔx60000000000ƒTg>ò÷‡" or missing value