program syz-executor.5 not setting count and/or reply_len properly ------------[ cut here ]------------ WARNING: CPU: 1 PID: 12417 at lib/iov_iter.c:629 _copy_from_iter+0x2f1/0x1130 Modules linked in: CPU: 1 PID: 12417 Comm: syz-executor.5 Not tainted 6.1.0-rc7-next-20221202 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:_copy_from_iter+0x2f1/0x1130 Code: 37 ff 44 89 f3 e9 2f ff ff ff e8 5a 16 37 ff be 79 02 00 00 48 c7 c7 40 bd 9e 84 e8 b9 94 5a ff e9 13 fe ff ff e8 3f 16 37 ff <0f> 0b 45 31 f6 e9 77 ff ff ff e8 30 16 37 ff 31 ff 89 ee e8 f7 11 RSP: 0018:ffff888043e275e8 EFLAGS: 00010212 RAX: 00000000000084a5 RBX: 0000000000000000 RCX: ffffc900031e8000 RDX: 0000000000040000 RSI: ffffffff8211fe11 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000001000 R13: ffffea000117b000 R14: 0000000000001000 R15: ffff888043e27818 FS: 00007ff2f6e21700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3699d083a4 CR3: 00000000469e4000 CR4: 0000000000350ee0 Call Trace: copy_page_from_iter+0xe3/0x180 blk_rq_map_user_iov+0xb0c/0x1650 blk_rq_map_user_io+0x1ee/0x220 sg_common_write.constprop.0+0xd84/0x15e0 sg_write.part.0+0x706/0xb20 sg_write+0x88/0xe0 vfs_write+0x358/0xe40 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7ff2f98abb19 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:00007ff2f6e21188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff2f99bef60 RCX: 00007ff2f98abb19 RDX: 0000000000000125 RSI: 00000000200003c0 RDI: 0000000000000005 RBP: 00007ff2f9905f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd557afcef R14: 00007ff2f6e21300 R15: 0000000000022000 irq event stamp: 10169 hardirqs last enabled at (10233): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (10328): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (3184): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (2517): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.5 not setting count and/or reply_len properly 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 loop1: detected capacity change from 0 to 112 sg_write: data in/out 524252/251 bytes for SCSI command 0x0-- guessing data in; program syz-executor.5 not setting count and/or reply_len properly loop4: detected capacity change from 0 to 40 loop1: detected capacity change from 0 to 112 loop1: detected capacity change from 0 to 112 syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 buffer_io_error: 15 callbacks suppressed Buffer I/O error on dev loop4, logical block 10, lost async page write loop4: detected capacity change from 0 to 40 loop0: 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 loop3: detected capacity change from 0 to 40 syz-executor.0: attempt to access beyond end of device loop0: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop0, logical block 10, lost async page write loop4: detected capacity change from 0 to 40 loop0: 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 loop0: detected capacity change from 0 to 40 loop3: detected capacity change from 0 to 40 Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout syz-executor.0: attempt to access beyond end of device loop0: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop0, logical block 10, lost async page write netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.