sg_write: data in/out 912/1 bytes for SCSI command 0x10-- guessing data in; program syz-executor.4 not setting count and/or reply_len properly ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4461 at lib/iov_iter.c:364 _copy_from_iter+0x2b2/0x1140 Modules linked in: CPU: 1 PID: 4461 Comm: syz-executor.4 Not tainted 6.2.0-rc7-next-20230213 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:_copy_from_iter+0x2b2/0x1140 Code: 5d 41 5e 41 5f e9 22 70 33 02 e8 09 04 36 ff be 70 01 00 00 48 c7 c7 60 d1 9e 84 e8 28 dc 59 ff e9 51 fe ff ff e8 ee 03 36 ff <0f> 0b 45 31 f6 eb 87 e8 e2 03 36 ff 31 ff 89 ee e8 49 ff 35 ff 40 RSP: 0018:ffff88801ed8f608 EFLAGS: 00010212 RAX: 00000000000010f8 RBX: 0000000000000000 RCX: ffffc9000481b000 RDX: 0000000000040000 RSI: ffffffff82156c82 RDI: 0000000000000001 RBP: 0000000000000390 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88801ed8f838 R14: 0000000000000390 R15: ffff88801ed8f838 FS: 00007fabd33b2700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fabd33b2718 CR3: 00000000423c8000 CR4: 0000000000350ee0 Call Trace: copy_page_from_iter+0x251/0x430 blk_rq_map_user_iov+0xb41/0x16c0 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+0x2cf/0xdc0 ksys_write+0x12b/0x260 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fabd5e7eb19 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:00007fabd33b2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fabd5f920e0 RCX: 00007fabd5e7eb19 RDX: 000000000000002b RSI: 0000000020000380 RDI: 0000000000000007 RBP: 00007fabd5ed8f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe098850bf R14: 00007fabd33b2300 R15: 0000000000022000 irq event stamp: 817 hardirqs last enabled at (827): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (838): [] __up_console_sem+0x5d/0x80 softirqs last enabled at (724): [] __irq_exit_rcu+0xcc/0x110 softirqs last disabled at (717): [] __irq_exit_rcu+0xcc/0x110 ---[ end trace 0000000000000000 ]--- loop7: detected capacity change from 0 to 16383 sg_write: data in/out 912/1 bytes for SCSI command 0x10-- guessing data in; program syz-executor.4 not setting count and/or reply_len properly sg_write: data in/out 912/1 bytes for SCSI command 0x10-- guessing data in; program syz-executor.4 not setting count and/or reply_len properly loop7: detected capacity change from 0 to 16383 sg_write: data in/out 912/1 bytes for SCSI command 0x10-- guessing data in; program syz-executor.4 not setting count and/or reply_len properly sg_write: data in/out 912/1 bytes for SCSI command 0x10-- guessing data in; program syz-executor.1 not setting count and/or reply_len properly sg_write: data in/out 912/1 bytes for SCSI command 0x10-- guessing data in; program syz-executor.4 not setting count and/or reply_len properly audit: type=1400 audit(1676288873.220:11): avc: denied { read } for pid=4543 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 sg_write: data in/out 912/1 bytes for SCSI command 0x10-- guessing data in; program syz-executor.1 not setting count and/or reply_len properly sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 40 00 I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 31 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 0, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 1, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 2, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 3 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 3, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 4 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 4, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 5 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 5, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 6 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 6, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 7 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 7, async page read sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 40 00 I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 32 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev sr0, logical block 0, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev sr0, logical block 1, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer syz-executor.7 (4599) used greatest stack depth: 24040 bytes left syz-executor.4 (4659) used greatest stack depth: 23912 bytes left loop2: detected capacity change from 0 to 40 loop0: detected capacity change from 0 to 256 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) syz-executor.7 (4667) used greatest stack depth: 23640 bytes left loop2: detected capacity change from 0 to 40 loop0: detected capacity change from 0 to 256 tmpfs: Bad value for 'huge' tmpfs: Bad value for 'huge' FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop2: detected capacity change from 0 to 40 syz-executor.7 (4711) used greatest stack depth: 23448 bytes left loop0: detected capacity change from 0 to 256 FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium