EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none. EXT4-fs (loop1): unmounting filesystem. nfs4: Unknown parameter '\\\' ================================================================== BUG: KASAN: slab-out-of-bounds in _copy_to_iter+0x493/0x1420 Read of size 4096 at addr ffff888008b8f000 by task syz-executor.6/3295 CPU: 0 PID: 3295 Comm: syz-executor.6 Not tainted 5.19.0-rc6-next-20220715 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack_lvl+0x8b/0xb3 print_report.cold+0x5e/0x5e5 kasan_report+0xb1/0x1c0 kasan_check_range+0x35/0x1c0 memcpy+0x20/0x60 _copy_to_iter+0x493/0x1420 seq_read_iter+0xdcb/0x12b0 generic_file_splice_read+0x187/0x4d0 do_splice_to+0x1bc/0x240 splice_file_to_pipe+0x104/0x120 do_sendfile+0x42a/0x1280 __x64_sys_sendfile64+0x1d1/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7549374b19 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:00007f75468ea188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f7549487f60 RCX: 00007f7549374b19 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000005 RBP: 00007f75493cef6d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000db8a R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd3f4018f R14: 00007f75468ea300 R15: 0000000000022000 Allocated by task 3295: kasan_save_stack+0x1e/0x40 __kasan_kmalloc+0x81/0xa0 kvmalloc_node+0x41/0x1e0 seq_read_iter+0x81c/0x12b0 generic_file_splice_read+0x187/0x4d0 do_splice_to+0x1bc/0x240 splice_file_to_pipe+0x104/0x120 do_sendfile+0x42a/0x1280 __x64_sys_sendfile64+0x1d1/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888008b8e000 which belongs to the cache kmalloc-cg-4k of size 4096 The buggy address is located 0 bytes to the right of 4096-byte region [ffff888008b8e000, ffff888008b8f000) The buggy address belongs to the physical page: page:00000000ee92b33e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8b88 head:00000000ee92b33e order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff8880096e1f81 flags: 0x100000000010200(slab|head|node=0|zone=1) raw: 0100000000010200 dead000000000100 dead000000000122 ffff88800784c280 raw: 0000000000000000 0000000080040004 00000001ffffffff ffff8880096e1f81 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888008b8ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888008b8ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888008b8f000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888008b8f080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888008b8f100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== nfs4: Unknown parameter '\\\' process 'syz-executor.6' launched './file1' with NULL argv: empty string added wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready loop4: detected capacity change from 0 to 264192 SELinux: security_context_str_to_sid (system_u) failed with errno=-22 loop4: detected capacity change from 0 to 264192 SELinux: security_context_str_to_sid (system_u) failed with errno=-22 I/O error, dev loop4, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev loop4, logical block 0, async page read loop4: unable to read partition table loop4: partition table beyond EOD, truncated wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready loop3: detected capacity change from 0 to 264192 9pnet_fd: Insufficient options for proto=fd loop3: detected capacity change from 0 to 264192 9pnet_fd: Insufficient options for proto=fd wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready