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 ================================================================== BUG: KASAN: stack-out-of-bounds in _copy_to_iter+0x493/0x1420 Read of size 4094 at addr ffff88801d097b12 by task syz-executor.2/3922 CPU: 1 PID: 3922 Comm: syz-executor.2 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 tty_read+0x29a/0x5d0 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: 0033:0x7f818aef7b19 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:00007f818846d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f818b00af60 RCX: 00007f818aef7b19 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007f818af51f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd1330160f R14: 00007f818846d300 R15: 0000000000022000 The buggy address belongs to stack of task syz-executor.2/3922 and is located at offset 66 in frame: tty_read+0x0/0x5d0 This frame has 2 objects: [32, 40) 'cookie' [64, 128) 'kernel_buf' The buggy address belongs to the physical page: page:000000004ceb0067 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d097 flags: 0x100000000000000(node=0|zone=1) raw: 0100000000000000 0000000000000000 ffffea00007425c8 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88801d097a00: 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 ffff88801d097a80: 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 >ffff88801d097b00: f2 f2 00 00 00 00 00 00 00 00 f3 f3 f3 f3 00 00 ^ ffff88801d097b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 ffff88801d097c00: f1 f1 f1 00 00 00 00 00 f2 f2 f2 f2 f2 00 00 00 ================================================================== 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 loop0: detected capacity change from 0 to 608 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 audit: type=1400 audit(1657902203.326:7): avc: denied { open } for pid=3959 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 audit: type=1400 audit(1657902203.326:8): avc: denied { kernel } for pid=3959 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 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 loop1: detected capacity change from 0 to 4096 EXT4-fs (loop1): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop1): group descriptors corrupted! loop1: detected capacity change from 0 to 4096 EXT4-fs (loop1): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop1): group descriptors corrupted! loop0: detected capacity change from 0 to 608 loop1: detected capacity change from 0 to 4096 EXT4-fs (loop1): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop1): group descriptors corrupted! loop0: detected capacity change from 0 to 608 loop1: detected capacity change from 0 to 4096 EXT4-fs (loop1): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop1): group descriptors corrupted! loop0: detected capacity change from 0 to 608 loop1: detected capacity change from 0 to 4096 EXT4-fs (loop1): ext4_check_descriptors: Inode table for group 0 overlaps superblock EXT4-fs (loop1): group descriptors corrupted! loop2: detected capacity change from 0 to 1 FAT-fs (loop2): bread failed, FSINFO block (sector = 1) loop2: detected capacity change from 0 to 1 FAT-fs (loop2): bread failed, FSINFO block (sector = 1) loop2: detected capacity change from 0 to 1 FAT-fs (loop2): bread failed, FSINFO block (sector = 1) loop2: detected capacity change from 0 to 1 FAT-fs (loop2): bread failed, FSINFO block (sector = 1) loop2: detected capacity change from 0 to 1 FAT-fs (loop2): bread failed, FSINFO block (sector = 1) loop6: detected capacity change from 0 to 4096 EXT4-fs (loop6): mounted filesystem without journal. Quota mode: none. EXT4-fs (loop6): unmounting filesystem. loop6: detected capacity change from 0 to 4096 EXT4-fs (loop6): mounted filesystem without journal. Quota mode: none. EXT4-fs (loop6): unmounting filesystem. loop6: detected capacity change from 0 to 4096 EXT4-fs (loop6): mounted filesystem without journal. Quota mode: none. EXT4-fs (loop6): unmounting filesystem. loop6: detected capacity change from 0 to 4096 EXT4-fs (loop6): mounted filesystem without journal. Quota mode: none. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. loop7: detected capacity change from 0 to 40 EXT4-fs (loop6): unmounting filesystem. loop7: detected capacity change from 0 to 40 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. loop7: detected capacity change from 0 to 40 random: crng reseeded on system resumption netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. hrtimer: interrupt took 26960 ns random: crng reseeded on system resumption loop7: detected capacity change from 0 to 40 random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption