[ 16.641699][ T265] ================================================================== [ 16.642201][ T265] BUG: KASAN: slab-use-after-free in emit_its_trampoline+0xa5/0x300 [ 16.642593][ T265] Read of size 1 at addr ffff888001926720 by task modprobe/265 [ 16.642864][ T265] [ 16.642960][ T265] CPU: 3 UID: 0 PID: 265 Comm: modprobe Not tainted 6.16.0-rc2-virtme #1 PREEMPT(full) [ 16.642965][ T265] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.642967][ T265] Call Trace: [ 16.642969][ T265] [ 16.642971][ T265] dump_stack_lvl+0x82/0xd0 [ 16.642981][ T265] print_address_description.constprop.0+0x2c/0x400 [ 16.642987][ T265] ? emit_its_trampoline+0xa5/0x300 [ 16.642991][ T265] print_report+0xb4/0x270 [ 16.642994][ T265] ? emit_its_trampoline+0xa5/0x300 [ 16.642997][ T265] ? kasan_addr_to_slab+0x25/0x80 [ 16.643002][ T265] ? emit_its_trampoline+0xa5/0x300 [ 16.643005][ T265] kasan_report+0xca/0x100 [ 16.643008][ T265] ? emit_its_trampoline+0xa5/0x300 [ 16.643013][ T265] ? emit_its_trampoline+0xa5/0x300 [ 16.643016][ T265] __kasan_check_byte+0x3a/0x50 [ 16.643019][ T265] krealloc_noprof+0x3d/0x320 [ 16.643024][ T265] ? execmem_alloc+0xc0/0x240 [ 16.643030][ T265] emit_its_trampoline+0xa5/0x300 [ 16.643034][ T265] ? __x86_indirect_paranoid_thunk_rcx+0x2/0x2 [ 16.643040][ T265] ? __pi___x86_indirect_thunk_rax+0x20/0x20 [ 16.643044][ T265] apply_retpolines+0xcf/0x550 [ 16.643049][ T265] ? __pfx_apply_retpolines+0x10/0x10 [ 16.643053][ T265] ? __pfx___mutex_lock+0x10/0x10 [ 16.643064][ T265] module_finalize+0x3d5/0x9d0 [ 16.643070][ T265] ? add_kallsyms+0x7bf/0xf40 [ 16.643078][ T265] ? __pfx_module_finalize+0x10/0x10 [ 16.643082][ T265] ? __pfx_cmp_ex_sort+0x10/0x10 [ 16.643085][ T265] ? __pfx_swap_ex+0x10/0x10 [ 16.643089][ T265] load_module+0x139a/0x2660 [ 16.643096][ T265] ? __pfx_load_module+0x10/0x10 [ 16.643099][ T265] ? kernel_read_file+0x3f5/0x550 [ 16.643107][ T265] ? kernel_read_file+0x3d0/0x550 [ 16.643111][ T265] ? __pfx_kernel_read_file+0x10/0x10 [ 16.643115][ T265] ? add_chain_cache+0x110/0x370 [ 16.643120][ T265] ? init_module_from_file+0xe9/0x150 [ 16.643123][ T265] init_module_from_file+0xe9/0x150 [ 16.643127][ T265] ? __pfx_init_module_from_file+0x10/0x10 [ 16.643134][ T265] ? idempotent_init_module+0x31a/0x620 [ 16.643137][ T265] ? __lock_release+0x5d/0x170 [ 16.643142][ T265] ? do_raw_spin_unlock+0x58/0x220 [ 16.643146][ T265] idempotent_init_module+0x335/0x620 [ 16.643151][ T265] ? __pfx_idempotent_init_module+0x10/0x10 [ 16.643157][ T265] ? cap_capable+0x94/0x230 [ 16.643165][ T265] __x64_sys_finit_module+0xca/0x150 [ 16.643168][ T265] ? do_syscall_64+0x85/0x380 [ 16.643173][ T265] do_syscall_64+0xc1/0x380 [ 16.643177][ T265] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.643181][ T265] RIP: 0033:0x7f07ceddee5d [ 16.643185][ T265] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48 [ 16.643188][ T265] RSP: 002b:00007ffe17083088 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 16.643193][ T265] RAX: ffffffffffffffda RBX: 00005570df1f9960 RCX: 00007f07ceddee5d [ 16.643195][ T265] RDX: 0000000000000000 RSI: 00005570ac594a2a RDI: 0000000000000005 [ 16.643197][ T265] RBP: 0000000000040000 R08: 0000000000000000 R09: 00007ffe170831c0 [ 16.643199][ T265] R10: 0000000000000005 R11: 0000000000000246 R12: 00005570ac594a2a [ 16.643200][ T265] R13: 00005570df1f9b10 R14: 00005570df1f9db0 R15: 0000000000000000 [ 16.643207][ T265] [ 16.643208][ T265] [ 16.654373][ T265] Allocated by task 244: [ 16.654511][ T265] kasan_save_stack+0x24/0x50 [ 16.654702][ T265] kasan_save_track+0x14/0x30 [ 16.654887][ T265] __kasan_kmalloc+0x7f/0x90 [ 16.655100][ T265] __kmalloc_noprof+0x1d4/0x470 [ 16.655292][ T265] virtqueue_add_split+0x6a7/0x1900 [ 16.655485][ T265] virtqueue_add_sgs+0x143/0x270 [ 16.655672][ T265] virtio_fs_enqueue_req+0x58c/0xfe0 [ 16.655863][ T265] virtio_fs_send_req+0x13a/0x710 [ 16.656055][ T265] __fuse_simple_request+0x22a/0xb50 [ 16.656260][ T265] fuse_readlink_folio+0x20b/0x400 [ 16.656441][ T265] fuse_get_link+0x12d/0x350 [ 16.656624][ T265] pick_link+0x7a2/0x1160 [ 16.656766][ T265] step_into+0x85a/0xfc0 [ 16.656904][ T265] link_path_walk+0x3c2/0xa10 [ 16.657084][ T265] path_openat+0x14d/0x380 [ 16.657266][ T265] do_filp_open+0x1d7/0x420 [ 16.657449][ T265] do_sys_openat2+0xd4/0x160 [ 16.657635][ T265] __x64_sys_openat+0x122/0x1e0 [ 16.657818][ T265] do_syscall_64+0xc1/0x380 [ 16.658003][ T265] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.658239][ T265] [ 16.658331][ T265] Freed by task 201: [ 16.658466][ T265] kasan_save_stack+0x24/0x50 [ 16.658650][ T265] kasan_save_track+0x14/0x30 [ 16.658833][ T265] kasan_save_free_info+0x3b/0x60 [ 16.659018][ T265] __kasan_slab_free+0x38/0x50 [ 16.659200][ T265] kfree+0x144/0x320 [ 16.659339][ T265] detach_buf_split+0x48d/0x6f0 [ 16.659520][ T265] virtqueue_get_buf_ctx_split+0x294/0x7f0 [ 16.659748][ T265] virtio_fs_requests_done_work+0x231/0x890 [ 16.659976][ T265] process_one_work+0xe43/0x1660 [ 16.660160][ T265] worker_thread+0x591/0xcf0 [ 16.660340][ T265] kthread+0x37b/0x600 [ 16.660480][ T265] ret_from_fork+0x243/0x320 [ 16.660663][ T265] ret_from_fork_asm+0x1a/0x30 [ 16.660849][ T265] [ 16.660943][ T265] The buggy address belongs to the object at ffff888001926720 [ 16.660943][ T265] which belongs to the cache kmalloc-96 of size 96 [ 16.661383][ T265] The buggy address is located 0 bytes inside of [ 16.661383][ T265] freed 96-byte region [ffff888001926720, ffff888001926780) [ 16.661822][ T265] [ 16.661914][ T265] The buggy address belongs to the physical page: [ 16.662139][ T265] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1926 [ 16.662460][ T265] flags: 0x80000000000000(node=0|zone=1) [ 16.662650][ T265] page_type: f5(slab) [ 16.662794][ T265] raw: 0080000000000000 ffff888001042340 ffffea00002553d0 ffffea00000aa290 [ 16.663120][ T265] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 [ 16.663447][ T265] page dumped because: kasan: bad access detected [ 16.663674][ T265] [ 16.663764][ T265] Memory state around the buggy address: [ 16.663939][ T265] ffff888001926600: fc fc fc fc 00 00 00 00 00 00 00 00 00 fc fc fc [ 16.664207][ T265] ffff888001926680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.664473][ T265] >ffff888001926700: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 16.664744][ T265] ^ [ 16.664923][ T265] ffff888001926780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.665215][ T265] ffff888001926800: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 fc [ 16.665492][ T265] ================================================================== [ 16.665796][ T265] Disabling lock debugging due to kernel taint WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr WAIT TIMEOUT stderr