syz-executor.1 (4206) used greatest stack depth: 23816 bytes left loop4: detected capacity change from 0 to 264192 ================================================================== BUG: KASAN: slab-out-of-bounds in _copy_to_iter+0x493/0x1420 Read of size 4087 at addr ffff88804201e011 by task syz-executor.0/4213 CPU: 0 PID: 4213 Comm: syz-executor.0 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+0x71a/0x12b0 generic_file_splice_read+0x187/0x4d0 do_splice_to+0x1bc/0x240 splice_direct_to_actor+0x2ac/0x8c0 do_splice_direct+0x1b8/0x290 do_sendfile+0xb1d/0x1280 __x64_sys_sendfile64+0x149/0x210 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd7d1161b19 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:00007fd7ce6b6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fd7d1275020 RCX: 00007fd7d1161b19 RDX: 0000000020000140 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 00007fd7d11bbf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc650f901f R14: 00007fd7ce6b6300 R15: 0000000000022000 Allocated by task 4190: kasan_save_stack+0x1e/0x40 __kasan_kmalloc+0x81/0xa0 kvmalloc_node+0x41/0x1e0 seq_read_iter+0x81c/0x12b0 do_iter_readv_writev+0x2f0/0x3c0 do_iter_read+0x2fb/0x750 vfs_readv+0xe5/0x160 __x64_sys_preadv+0x22f/0x310 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88804201e000 which belongs to the cache kmalloc-cg-4k of size 4096 The buggy address is located 17 bytes inside of 4096-byte region [ffff88804201e000, ffff88804201f000) The buggy address belongs to the physical page: page:0000000028462cdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42018 head:0000000028462cdd order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff888016f1ad01 flags: 0x100000000010200(slab|head|node=0|zone=1) raw: 0100000000010200 0000000000000000 dead000000000122 ffff88800784c280 raw: 0000000000000000 0000000080040004 00000001ffffffff ffff888016f1ad01 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88804201ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804201ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88804201f000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88804201f080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804201f100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== loop2: detected capacity change from 0 to 1024 FAT-fs (loop2): bogus number of reserved sectors FAT-fs (loop2): Can't find a valid FAT filesystem I/O error, dev loop2, sector 1 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev loop2, logical block 1, async page read loop5: detected capacity change from 0 to 255 I/O error, dev loop2, sector 2 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev loop2, logical block 2, async page read FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) I/O error, dev loop2, sector 3 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev loop2, logical block 3, async page read I/O error, dev loop2, sector 4 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev loop2, logical block 4, async page read I/O error, dev loop2, sector 5 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev loop2, logical block 5, async page read I/O error, dev loop2, sector 6 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev loop2, logical block 6, async page read I/O error, dev loop2, sector 7 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev loop2, logical block 7, async page read Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout loop5: detected capacity change from 0 to 255 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)