HARD STOP (0) WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr [ 49.862510][ T292] ip (292) used greatest stack depth: 24712 bytes left [ 69.149107][ T370] modprobe (370) used greatest stack depth: 24592 bytes left [ 69.480276][ T371] ================================================================== [ 69.480997][ T371] BUG: KASAN: slab-use-after-free in emit_its_trampoline+0xa5/0x300 [ 69.481631][ T371] Read of size 1 at addr ffff888001936720 by task modprobe/371 [ 69.482215][ T371] [ 69.482426][ T371] CPU: 3 UID: 0 PID: 371 Comm: modprobe Not tainted 6.16.0-rc2-virtme #1 PREEMPT(full) [ 69.482436][ T371] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 69.482440][ T371] Call Trace: [ 69.482444][ T371] [ 69.482447][ T371] dump_stack_lvl+0x82/0xd0 [ 69.482466][ T371] print_address_description.constprop.0+0x2c/0x400 [ 69.482582][ T371] ? emit_its_trampoline+0xa5/0x300 [ 69.482593][ T371] print_report+0xb4/0x270 [ 69.482600][ T371] ? emit_its_trampoline+0xa5/0x300 [ 69.482605][ T371] ? kasan_addr_to_slab+0x25/0x80 [ 69.482611][ T371] ? emit_its_trampoline+0xa5/0x300 [ 69.482616][ T371] kasan_report+0xca/0x100 [ 69.482624][ T371] ? emit_its_trampoline+0xa5/0x300 [ 69.482635][ T371] ? emit_its_trampoline+0xa5/0x300 [ 69.482640][ T371] __kasan_check_byte+0x3a/0x50 [ 69.482646][ T371] krealloc_noprof+0x3d/0x320 [ 69.482653][ T371] ? execmem_alloc+0xc0/0x240 [ 69.482664][ T371] emit_its_trampoline+0xa5/0x300 [ 69.482670][ T371] ? __x86_indirect_paranoid_thunk_rax+0x2/0x2 [ 69.482681][ T371] ? __do_softirq+0x10/0x10 [ 69.482687][ T371] apply_retpolines+0xcf/0x550 [ 69.482696][ T371] ? __pfx_apply_retpolines+0x10/0x10 [ 69.482702][ T371] ? __pfx___mutex_lock+0x10/0x10 [ 69.482723][ T371] module_finalize+0x3d5/0x9d0 [ 69.482734][ T371] ? add_kallsyms+0x7bf/0xf40 [ 69.482744][ T371] ? __pfx_module_finalize+0x10/0x10 [ 69.482751][ T371] ? __pfx_cmp_ex_sort+0x10/0x10 [ 69.482757][ T371] ? __pfx_swap_ex+0x10/0x10 [ 69.482766][ T371] load_module+0x139a/0x2660 [ 69.482794][ T371] ? __pfx_load_module+0x10/0x10 [ 69.482800][ T371] ? kernel_read_file+0x3f5/0x550 [ 69.482811][ T371] ? kernel_read_file+0x3d0/0x550 [ 69.482819][ T371] ? __pfx_kernel_read_file+0x10/0x10 [ 69.482830][ T371] ? init_module_from_file+0xe9/0x150 [ 69.482835][ T371] init_module_from_file+0xe9/0x150 [ 69.482842][ T371] ? __pfx_init_module_from_file+0x10/0x10 [ 69.482856][ T371] ? idempotent_init_module+0x31a/0x620 [ 69.482861][ T371] ? __lock_release+0x5d/0x170 [ 69.482872][ T371] ? do_raw_spin_unlock+0x58/0x220 [ 69.482879][ T371] idempotent_init_module+0x335/0x620 [ 69.482887][ T371] ? __pfx_idempotent_init_module+0x10/0x10 [ 69.482900][ T371] ? cap_capable+0x94/0x230 [ 69.482913][ T371] __x64_sys_finit_module+0xca/0x150 [ 69.482918][ T371] ? do_syscall_64+0x85/0x380 [ 69.482927][ T371] do_syscall_64+0xc1/0x380 [ 69.482934][ T371] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.482942][ T371] RIP: 0033:0x7f67441d1e5d [ 69.482951][ T371] 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 [ 69.482957][ T371] RSP: 002b:00007fff17178f28 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 69.482965][ T371] RAX: ffffffffffffffda RBX: 000056221f552b70 RCX: 00007f67441d1e5d [ 69.482969][ T371] RDX: 0000000000000000 RSI: 000056221cc3ca2a RDI: 0000000000000005 [ 69.482973][ T371] RBP: 0000000000040000 R08: 0000000000000000 R09: 00007fff17179060 [ 69.482976][ T371] R10: 0000000000000005 R11: 0000000000000246 R12: 000056221cc3ca2a [ 69.482979][ T371] R13: 000056221f552c90 R14: 000056221f552ee0 R15: 0000000000000000 [ 69.482993][ T371] [ 69.482996][ T371] [ 69.579218][ T371] Allocated by task 353: [ 69.579725][ T371] kasan_save_stack+0x24/0x50 [ 69.580379][ T371] kasan_save_track+0x14/0x30 [ 69.581041][ T371] __kasan_kmalloc+0x7f/0x90 [ 69.581716][ T371] __kmalloc_noprof+0x1d4/0x470 [ 69.582345][ T371] virtqueue_add_split+0x6a3/0x1920 [ 69.582982][ T371] virtqueue_add_sgs+0x143/0x270 [ 69.583622][ T371] virtio_fs_enqueue_req+0x58c/0xfe0 [ 69.584275][ T371] virtio_fs_send_req+0x13a/0x710 [ 69.584925][ T371] __fuse_simple_request+0x237/0xc20 [ 69.585567][ T371] fuse_readlink_folio+0x20b/0x400 [ 69.586194][ T371] fuse_get_link+0x12d/0x350 [ 69.586890][ T371] pick_link+0x7a2/0x1160 [ 69.587371][ T371] step_into+0x85a/0xfc0 [ 69.587862][ T371] link_path_walk+0x3c2/0xa10 [ 69.588490][ T371] path_openat+0x14d/0x380 [ 69.589133][ T371] do_filp_open+0x1d7/0x420 [ 69.589783][ T371] do_open_execat+0xaa/0x2e0 [ 69.590391][ T371] open_exec+0x2b/0x50 [ 69.590914][ T371] load_elf_binary+0x51e/0x2960 [ 69.591598][ T371] exec_binprm+0x255/0x640 [ 69.592227][ T371] bprm_execve+0x1af/0x490 [ 69.592875][ T371] do_execveat_common.isra.0+0x3f5/0x550 [ 69.593527][ T371] __x64_sys_execve+0x8e/0xb0 [ 69.594179][ T371] do_syscall_64+0xc1/0x380 [ 69.594855][ T371] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.595690][ T371] [ 69.596025][ T371] Freed by task 52: [ 69.596568][ T371] kasan_save_stack+0x24/0x50 [ 69.609999][ T371] kasan_save_track+0x14/0x30 [ 69.610349][ T371] kasan_save_free_info+0x3b/0x60 [ 69.610708][ T371] __kasan_slab_free+0x38/0x50 [ 69.611043][ T371] kfree+0x144/0x320 [ 69.611287][ T371] detach_buf_split+0x48d/0x6f0 [ 69.611625][ T371] virtqueue_get_buf_ctx_split+0x294/0x7f0 [ 69.612027][ T371] virtio_fs_requests_done_work+0x231/0x890 [ 69.612430][ T371] process_one_work+0xe43/0x1660 [ 69.612758][ T371] worker_thread+0x591/0xcf0 [ 69.613085][ T371] kthread+0x37e/0x600 [ 69.613340][ T371] ret_from_fork+0x243/0x320 [ 69.613783][ T371] ret_from_fork_asm+0x1a/0x30 [ 69.614124][ T371] [ 69.614293][ T371] The buggy address belongs to the object at ffff888001936720 [ 69.614293][ T371] which belongs to the cache kmalloc-96 of size 96 [ 69.615124][ T371] The buggy address is located 0 bytes inside of [ 69.615124][ T371] freed 96-byte region [ffff888001936720, ffff888001936780) [ 69.615916][ T371] [ 69.616079][ T371] The buggy address belongs to the physical page: [ 69.616496][ T371] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1936 [ 69.617102][ T371] flags: 0x80000000000000(node=0|zone=1) [ 69.617441][ T371] page_type: f5(slab) [ 69.617839][ T371] raw: 0080000000000000 ffff888001042340 ffffea0000047250 ffffea0000201ed0 [ 69.618421][ T371] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 [ 69.618991][ T371] page dumped because: kasan: bad access detected [ 69.619390][ T371] [ 69.619552][ T371] Memory state around the buggy address: [ 69.619870][ T371] ffff888001936600: fc fc fc fc 00 00 00 00 00 00 00 00 00 fc fc fc [ 69.620347][ T371] ffff888001936680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.620815][ T371] >ffff888001936700: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 69.621281][ T371] ^ [ 69.621716][ T371] ffff888001936780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.622181][ T371] ffff888001936800: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 fc [ 69.622661][ T371] ================================================================== [ 69.623299][ T371] Disabling lock debugging due to kernel taint WAIT TIMEOUT stderr