[ 130.111244][ T1349] ================================================================== [ 130.111735][ T1349] BUG: KASAN: slab-use-after-free in emit_its_trampoline+0xa5/0x300 [ 130.112029][ T1349] Read of size 1 at addr ffff888001926720 by task modprobe/1349 [ 130.112408][ T1349] [ 130.112507][ T1349] CPU: 2 UID: 0 PID: 1349 Comm: modprobe Not tainted 6.16.0-rc2-virtme #1 PREEMPT(full) [ 130.112512][ T1349] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 130.112515][ T1349] Call Trace: [ 130.112517][ T1349] [ 130.112519][ T1349] dump_stack_lvl+0x82/0xd0 [ 130.112530][ T1349] print_address_description.constprop.0+0x2c/0x400 [ 130.112536][ T1349] ? emit_its_trampoline+0xa5/0x300 [ 130.112540][ T1349] print_report+0xb4/0x270 [ 130.112543][ T1349] ? emit_its_trampoline+0xa5/0x300 [ 130.112546][ T1349] ? kasan_addr_to_slab+0x25/0x80 [ 130.112553][ T1349] ? emit_its_trampoline+0xa5/0x300 [ 130.112556][ T1349] kasan_report+0xca/0x100 [ 130.112559][ T1349] ? emit_its_trampoline+0xa5/0x300 [ 130.112565][ T1349] ? emit_its_trampoline+0xa5/0x300 [ 130.112568][ T1349] __kasan_check_byte+0x3a/0x50 [ 130.112571][ T1349] krealloc_noprof+0x3d/0x320 [ 130.112577][ T1349] ? execmem_alloc+0xc0/0x240 [ 130.112583][ T1349] emit_its_trampoline+0xa5/0x300 [ 130.112586][ T1349] ? __x86_indirect_paranoid_thunk_rcx+0x2/0x2 [ 130.112594][ T1349] ? __pi___x86_indirect_thunk_rax+0x20/0x20 [ 130.112597][ T1349] apply_retpolines+0xcf/0x550 [ 130.112603][ T1349] ? __pfx_apply_retpolines+0x10/0x10 [ 130.112607][ T1349] ? __pfx___mutex_lock+0x10/0x10 [ 130.112618][ T1349] module_finalize+0x3d5/0x9d0 [ 130.112625][ T1349] ? add_kallsyms+0x7bf/0xf40 [ 130.112632][ T1349] ? __pfx_module_finalize+0x10/0x10 [ 130.112636][ T1349] ? __pfx_cmp_ex_sort+0x10/0x10 [ 130.112640][ T1349] ? __pfx_swap_ex+0x10/0x10 [ 130.112644][ T1349] load_module+0x139a/0x2660 [ 130.112652][ T1349] ? __pfx_load_module+0x10/0x10 [ 130.112655][ T1349] ? kernel_read_file+0x3f5/0x550 [ 130.112663][ T1349] ? kernel_read_file+0x3d0/0x550 [ 130.112668][ T1349] ? __pfx_kernel_read_file+0x10/0x10 [ 130.112672][ T1349] ? add_chain_cache+0x110/0x370 [ 130.112678][ T1349] ? init_module_from_file+0xe9/0x150 [ 130.112681][ T1349] init_module_from_file+0xe9/0x150 [ 130.112685][ T1349] ? __pfx_init_module_from_file+0x10/0x10 [ 130.112693][ T1349] ? idempotent_init_module+0x31a/0x620 [ 130.112696][ T1349] ? __lock_release+0x5d/0x170 [ 130.112701][ T1349] ? do_raw_spin_unlock+0x58/0x220 [ 130.112706][ T1349] idempotent_init_module+0x335/0x620 [ 130.112711][ T1349] ? __pfx_idempotent_init_module+0x10/0x10 [ 130.112718][ T1349] ? cap_capable+0x94/0x230 [ 130.112726][ T1349] __x64_sys_finit_module+0xca/0x150 [ 130.112729][ T1349] ? do_syscall_64+0x85/0x380 [ 130.112735][ T1349] do_syscall_64+0xc1/0x380 [ 130.112738][ T1349] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 130.112742][ T1349] RIP: 0033:0x7fa1ee6e3e5d [ 130.112748][ T1349] 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 [ 130.112751][ T1349] RSP: 002b:00007ffe481e8aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 130.112755][ T1349] RAX: ffffffffffffffda RBX: 0000560cd0094960 RCX: 00007fa1ee6e3e5d [ 130.112758][ T1349] RDX: 0000000000000000 RSI: 0000560cc6d20a2a RDI: 0000000000000005 [ 130.112760][ T1349] RBP: 0000000000040000 R08: 0000000000000000 R09: 00007ffe481e8be0 [ 130.112762][ T1349] R10: 0000000000000005 R11: 0000000000000246 R12: 0000560cc6d20a2a [ 130.112764][ T1349] R13: 0000560cd0094b10 R14: 0000560cd0094db0 R15: 0000000000000000 [ 130.112771][ T1349] [ 130.112772][ T1349] [ 130.125832][ T1349] Allocated by task 1349: [ 130.125976][ T1349] kasan_save_stack+0x24/0x50 [ 130.126168][ T1349] kasan_save_track+0x14/0x30 [ 130.126355][ T1349] __kasan_kmalloc+0x7f/0x90 [ 130.126540][ T1349] __kmalloc_noprof+0x1d4/0x470 [ 130.126833][ T1349] virtqueue_add_split+0x6a3/0x1920 [ 130.127023][ T1349] virtqueue_add_sgs+0x143/0x270 [ 130.127213][ T1349] virtio_fs_enqueue_req+0x58c/0xfe0 [ 130.127404][ T1349] virtio_fs_send_req+0x13a/0x710 [ 130.127693][ T1349] __fuse_simple_request+0x22a/0xb50 [ 130.127885][ T1349] fuse_readlink_folio+0x20b/0x400 [ 130.128073][ T1349] fuse_get_link+0x12d/0x350 [ 130.128261][ T1349] pick_link+0x7a2/0x1160 [ 130.128504][ T1349] step_into+0x85a/0xfc0 [ 130.128644][ T1349] link_path_walk+0x3c2/0xa10 [ 130.128830][ T1349] path_openat+0x14d/0x380 [ 130.129022][ T1349] do_filp_open+0x1d7/0x420 [ 130.129310][ T1349] do_sys_openat2+0xd4/0x160 [ 130.129499][ T1349] __x64_sys_openat+0x122/0x1e0 [ 130.129688][ T1349] do_syscall_64+0xc1/0x380 [ 130.129876][ T1349] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 130.130114][ T1349] [ 130.130212][ T1349] Freed by task 62: [ 130.130349][ T1349] kasan_save_stack+0x24/0x50 [ 130.130539][ T1349] kasan_save_track+0x14/0x30 [ 130.130728][ T1349] kasan_save_free_info+0x3b/0x60 [ 130.131022][ T1349] __kasan_slab_free+0x38/0x50 [ 130.131209][ T1349] kfree+0x144/0x320 [ 130.131370][ T1349] detach_buf_split+0x48d/0x6f0 [ 130.131565][ T1349] virtqueue_get_buf_ctx_split+0x294/0x7f0 [ 130.131924][ T1349] virtio_fs_requests_done_work+0x231/0x890 [ 130.132163][ T1349] process_one_work+0xe43/0x1660 [ 130.132357][ T1349] worker_thread+0x591/0xcf0 [ 130.132654][ T1349] kthread+0x37b/0x600 [ 130.132799][ T1349] ret_from_fork+0x243/0x320 [ 130.132992][ T1349] ret_from_fork_asm+0x1a/0x30 [ 130.133187][ T1349] [ 130.133283][ T1349] The buggy address belongs to the object at ffff888001926720 [ 130.133283][ T1349] which belongs to the cache kmalloc-96 of size 96 [ 130.133845][ T1349] The buggy address is located 0 bytes inside of [ 130.133845][ T1349] freed 96-byte region [ffff888001926720, ffff888001926780) [ 130.134409][ T1349] [ 130.134503][ T1349] The buggy address belongs to the physical page: [ 130.134732][ T1349] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1926 [ 130.135070][ T1349] flags: 0x80000000000000(node=0|zone=1) [ 130.135395][ T1349] page_type: f5(slab) [ 130.135541][ T1349] raw: 0080000000000000 ffff888001042340 ffffea0000413850 ffffea00000a4b90 [ 130.135899][ T1349] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 [ 130.136348][ T1349] page dumped because: kasan: bad access detected [ 130.136580][ T1349] [ 130.136684][ T1349] Memory state around the buggy address: [ 130.136873][ T1349] ffff888001926600: fc fc fc fc 00 00 00 00 00 00 00 00 00 fc fc fc [ 130.137249][ T1349] ffff888001926680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 130.137524][ T1349] >ffff888001926700: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 130.137896][ T1349] ^ [ 130.138078][ T1349] ffff888001926780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 130.138353][ T1349] ffff888001926800: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 fc [ 130.138723][ T1349] ================================================================== [ 130.139058][ T1349] Disabling lock debugging due to kernel taint WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr WAIT TIMEOUT stderr