HARD STOP (0) WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr [ 197.043828][ T468] ip (468) used greatest stack depth: 23792 bytes left [ 217.289662][ T535] veth0: renamed from veth-hv-1 [ 225.274862][ T561] ================================================================== [ 225.275998][ T561] BUG: KASAN: slab-use-after-free in emit_its_trampoline+0xa5/0x300 [ 225.276973][ T561] Read of size 1 at addr ffff888001936720 by task modprobe/561 [ 225.277892][ T561] [ 225.278186][ T561] CPU: 0 UID: 0 PID: 561 Comm: modprobe Not tainted 6.16.0-rc2-virtme #1 PREEMPT(full) [ 225.278198][ T561] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 225.278206][ T561] Call Trace: [ 225.278215][ T561] [ 225.278218][ T561] dump_stack_lvl+0x82/0xd0 [ 225.278251][ T561] print_address_description.constprop.0+0x2c/0x400 [ 225.278274][ T561] ? emit_its_trampoline+0xa5/0x300 [ 225.278284][ T561] print_report+0xb4/0x270 [ 225.278290][ T561] ? emit_its_trampoline+0xa5/0x300 [ 225.278295][ T561] ? kasan_addr_to_slab+0x25/0x80 [ 225.278301][ T561] ? emit_its_trampoline+0xa5/0x300 [ 225.278306][ T561] kasan_report+0xca/0x100 [ 225.278313][ T561] ? emit_its_trampoline+0xa5/0x300 [ 225.278325][ T561] ? emit_its_trampoline+0xa5/0x300 [ 225.278331][ T561] __kasan_check_byte+0x3a/0x50 [ 225.278337][ T561] krealloc_noprof+0x3d/0x320 [ 225.278344][ T561] ? execmem_alloc+0xc0/0x240 [ 225.278359][ T561] emit_its_trampoline+0xa5/0x300 [ 225.278366][ T561] ? __x86_indirect_paranoid_thunk_rcx+0x2/0x2 [ 225.278380][ T561] ? __pi___x86_indirect_thunk_rax+0x20/0x20 [ 225.278387][ T561] apply_retpolines+0xcf/0x550 [ 225.278396][ T561] ? __pfx_apply_retpolines+0x10/0x10 [ 225.278402][ T561] ? __pfx___mutex_lock+0x10/0x10 [ 225.278493][ T561] module_finalize+0x3d5/0x9d0 [ 225.278510][ T561] ? add_kallsyms+0x7bf/0xf40 [ 225.278526][ T561] ? __pfx_module_finalize+0x10/0x10 [ 225.278533][ T561] ? __pfx_cmp_ex_sort+0x10/0x10 [ 225.278539][ T561] ? __pfx_swap_ex+0x10/0x10 [ 225.278547][ T561] load_module+0x139a/0x2660 [ 225.278560][ T561] ? __pfx_load_module+0x10/0x10 [ 225.278566][ T561] ? kernel_read_file+0x3f5/0x550 [ 225.278588][ T561] ? kernel_read_file+0x3d0/0x550 [ 225.278596][ T561] ? __pfx_kernel_read_file+0x10/0x10 [ 225.278606][ T561] ? init_module_from_file+0xe9/0x150 [ 225.278611][ T561] init_module_from_file+0xe9/0x150 [ 225.278617][ T561] ? __pfx_init_module_from_file+0x10/0x10 [ 225.278634][ T561] ? idempotent_init_module+0x31a/0x620 [ 225.278638][ T561] ? __lock_release+0x5d/0x170 [ 225.278658][ T561] ? do_raw_spin_unlock+0x58/0x220 [ 225.278665][ T561] idempotent_init_module+0x335/0x620 [ 225.278672][ T561] ? __pfx_idempotent_init_module+0x10/0x10 [ 225.278688][ T561] ? cap_capable+0x94/0x230 [ 225.278704][ T561] __x64_sys_finit_module+0xca/0x150 [ 225.278709][ T561] ? do_syscall_64+0x85/0x380 [ 225.278721][ T561] do_syscall_64+0xc1/0x380 [ 225.278728][ T561] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 225.278740][ T561] RIP: 0033:0x7fe638c99e5d [ 225.278747][ T561] 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 [ 225.278751][ T561] RSP: 002b:00007ffdb5109cf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 225.278762][ T561] RAX: ffffffffffffffda RBX: 0000561b28f4fb90 RCX: 00007fe638c99e5d [ 225.278766][ T561] RDX: 0000000000000000 RSI: 0000561b287efa2a RDI: 0000000000000000 [ 225.278769][ T561] RBP: 0000000000040000 R08: 0000000000000000 R09: 00007ffdb5109e30 [ 225.278772][ T561] R10: 0000000000000000 R11: 0000000000000246 R12: 0000561b287efa2a [ 225.278775][ T561] R13: 0000561b28f4feb0 R14: 0000561b28f4ff00 R15: 0000561b28f4fbfe [ 225.278788][ T561] [ 225.278790][ T561] [ 225.318828][ T561] Allocated by task 546: [ 225.319288][ T561] kasan_save_stack+0x24/0x50 [ 225.319989][ T561] kasan_save_track+0x14/0x30 [ 225.320752][ T561] __kasan_kmalloc+0x7f/0x90 [ 225.321340][ T561] __kmalloc_noprof+0x1d4/0x470 [ 225.322019][ T561] virtqueue_add_split+0x6a3/0x1920 [ 225.322831][ T561] virtqueue_add_sgs+0x143/0x270 [ 225.323528][ T561] virtio_fs_enqueue_req+0x58c/0xfe0 [ 225.324176][ T561] virtio_fs_send_req+0x13a/0x710 [ 225.324970][ T561] __fuse_simple_request+0x237/0xc20 [ 225.325680][ T561] fuse_readlink_folio+0x20b/0x400 [ 225.326291][ T561] fuse_get_link+0x12d/0x350 [ 225.326957][ T561] pick_link+0x7a2/0x1160 [ 225.327506][ T561] step_into+0x85a/0xfc0 [ 225.327995][ T561] link_path_walk+0x3c2/0xa10 [ 225.328801][ T561] path_lookupat+0x117/0x630 [ 225.329503][ T561] filename_lookup+0x1c4/0x470 [ 225.330151][ T561] vfs_statx+0xaa/0x2e0 [ 225.330693][ T561] vfs_fstatat+0x68/0xa0 [ 225.331151][ T561] __do_sys_newfstatat+0x6a/0xc0 [ 225.331817][ T561] do_syscall_64+0xc1/0x380 [ 225.332629][ T561] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 225.333371][ T561] [ 225.333731][ T561] Freed by task 76: [ 225.334138][ T561] kasan_save_stack+0x24/0x50 [ 225.334820][ T561] kasan_save_track+0x14/0x30 [ 225.335488][ T561] kasan_save_free_info+0x3b/0x60 [ 225.343157][ T561] __kasan_slab_free+0x38/0x50 [ 225.343984][ T561] kfree+0x144/0x320 [ 225.344515][ T561] detach_buf_split+0x48d/0x6f0 [ 225.345162][ T561] virtqueue_get_buf_ctx_split+0x294/0x7f0 [ 225.345984][ T561] virtio_fs_requests_done_work+0x231/0x890 [ 225.346934][ T561] process_one_work+0xe43/0x1660 [ 225.347665][ T561] worker_thread+0x591/0xcf0 [ 225.348275][ T561] kthread+0x37e/0x600 [ 225.348818][ T561] ret_from_fork+0x243/0x320 [ 225.349496][ T561] ret_from_fork_asm+0x1a/0x30 [ 225.350166][ T561] [ 225.350630][ T561] The buggy address belongs to the object at ffff888001936720 [ 225.350630][ T561] which belongs to the cache kmalloc-96 of size 96 [ 225.352254][ T561] The buggy address is located 0 bytes inside of [ 225.352254][ T561] freed 96-byte region [ffff888001936720, ffff888001936780) [ 225.354105][ T561] [ 225.354557][ T561] The buggy address belongs to the physical page: [ 225.355325][ T561] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1936 [ 225.356495][ T561] flags: 0x80000000000000(node=0|zone=1) [ 225.357155][ T561] page_type: f5(slab) [ 225.357719][ T561] raw: 0080000000000000 ffff888001042340 ffffea00002a1290 ffffea0000328850 [ 225.359043][ T561] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 [ 225.360243][ T561] page dumped because: kasan: bad access detected [ 225.361130][ T561] [ 225.370531][ T561] Memory state around the buggy address: [ 225.371384][ T561] ffff888001936600: fc fc fc fc 00 00 00 00 00 00 00 00 00 fc fc fc [ 225.372928][ T561] ffff888001936680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 225.374504][ T561] >ffff888001936700: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 225.375941][ T561] ^ [ 225.377055][ T561] ffff888001936780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 225.378374][ T561] ffff888001936800: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 fc [ 225.379778][ T561] ================================================================== [ 225.405485][ T561] Disabling lock debugging due to kernel taint WAIT TIMEOUT stderr