[ 13.354327][ T250] ip (250) used greatest stack depth: 24800 bytes left [ 17.257908][ T310] ================================================================== [ 17.258287][ T310] BUG: KASAN: slab-use-after-free in emit_its_trampoline+0xa5/0x300 [ 17.258550][ T310] Read of size 1 at addr ffff888001932720 by task modprobe/310 [ 17.258809][ T310] [ 17.258904][ T310] CPU: 2 UID: 0 PID: 310 Comm: modprobe Not tainted 6.16.0-rc2-virtme #1 PREEMPT(full) [ 17.258908][ T310] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 17.258911][ T310] Call Trace: [ 17.258912][ T310] [ 17.258914][ T310] dump_stack_lvl+0x82/0xd0 [ 17.258921][ T310] print_address_description.constprop.0+0x2c/0x400 [ 17.258927][ T310] ? emit_its_trampoline+0xa5/0x300 [ 17.258931][ T310] print_report+0xb4/0x270 [ 17.258934][ T310] ? emit_its_trampoline+0xa5/0x300 [ 17.258937][ T310] ? kasan_addr_to_slab+0x25/0x80 [ 17.258940][ T310] ? emit_its_trampoline+0xa5/0x300 [ 17.258943][ T310] kasan_report+0xca/0x100 [ 17.258947][ T310] ? emit_its_trampoline+0xa5/0x300 [ 17.258952][ T310] ? emit_its_trampoline+0xa5/0x300 [ 17.258955][ T310] __kasan_check_byte+0x3a/0x50 [ 17.258958][ T310] krealloc_noprof+0x3d/0x320 [ 17.258962][ T310] ? execmem_alloc+0xc0/0x240 [ 17.258968][ T310] emit_its_trampoline+0xa5/0x300 [ 17.258971][ T310] ? __x86_indirect_paranoid_thunk_rax+0x2/0x2 [ 17.258976][ T310] ? __do_softirq+0x10/0x10 [ 17.258981][ T310] apply_retpolines+0xcf/0x550 [ 17.258984][ T310] ? rcu_is_watching+0x12/0xc0 [ 17.258989][ T310] ? __pfx_apply_retpolines+0x10/0x10 [ 17.258992][ T310] ? __pfx___mutex_lock+0x10/0x10 [ 17.258998][ T310] ? memcmp+0x67/0x1d0 [ 17.259004][ T310] module_finalize+0x3d5/0x9d0 [ 17.259011][ T310] ? add_kallsyms+0x8d7/0xf40 [ 17.259015][ T310] ? __pfx_module_finalize+0x10/0x10 [ 17.259019][ T310] ? __pfx_cmp_ex_sort+0x10/0x10 [ 17.259022][ T310] ? __pfx_swap_ex+0x10/0x10 [ 17.259026][ T310] load_module+0x139a/0x2660 [ 17.259032][ T310] ? __pfx_load_module+0x10/0x10 [ 17.259035][ T310] ? kernel_read_file+0x3f5/0x550 [ 17.259041][ T310] ? kernel_read_file+0x3d0/0x550 [ 17.259044][ T310] ? __pfx_kernel_read_file+0x10/0x10 [ 17.259049][ T310] ? init_module_from_file+0xe9/0x150 [ 17.259052][ T310] init_module_from_file+0xe9/0x150 [ 17.259055][ T310] ? __pfx_init_module_from_file+0x10/0x10 [ 17.259062][ T310] ? idempotent_init_module+0x31a/0x620 [ 17.259065][ T310] ? __lock_release+0x5d/0x170 [ 17.259069][ T310] ? do_raw_spin_unlock+0x58/0x220 [ 17.259073][ T310] idempotent_init_module+0x335/0x620 [ 17.259077][ T310] ? __pfx_idempotent_init_module+0x10/0x10 [ 17.259083][ T310] ? cap_capable+0x94/0x230 [ 17.259090][ T310] __x64_sys_finit_module+0xca/0x150 [ 17.259093][ T310] ? do_syscall_64+0x85/0x380 [ 17.259096][ T310] do_syscall_64+0xc1/0x380 [ 17.259099][ T310] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.259102][ T310] RIP: 0033:0x7f346bd0be5d [ 17.259106][ T310] 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 [ 17.259109][ T310] RSP: 002b:00007ffda47141e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 17.259113][ T310] RAX: ffffffffffffffda RBX: 000056030e162c80 RCX: 00007f346bd0be5d [ 17.259115][ T310] RDX: 0000000000000000 RSI: 00005602f93e4a2a RDI: 0000000000000000 [ 17.259116][ T310] RBP: 0000000000040000 R08: 0000000000000000 R09: 00007ffda4714320 [ 17.259118][ T310] R10: 0000000000000000 R11: 0000000000000246 R12: 00005602f93e4a2a [ 17.259120][ T310] R13: 000056030e162d40 R14: 000056030e162dc0 R15: 000056030e162cec [ 17.259126][ T310] [ 17.259127][ T310] [ 17.270102][ T310] Allocated by task 298: [ 17.270237][ T310] kasan_save_stack+0x24/0x50 [ 17.270423][ T310] kasan_save_track+0x14/0x30 [ 17.270604][ T310] __kasan_kmalloc+0x7f/0x90 [ 17.270793][ T310] __kmalloc_noprof+0x1d4/0x470 [ 17.270972][ T310] virtqueue_add_split+0x6a3/0x1920 [ 17.271151][ T310] virtqueue_add_sgs+0x143/0x270 [ 17.271327][ T310] virtio_fs_enqueue_req+0x58c/0xfe0 [ 17.271509][ T310] virtio_fs_send_req+0x13a/0x710 [ 17.271696][ T310] __fuse_simple_request+0x22a/0xb50 [ 17.271882][ T310] fuse_file_put+0x170/0x1f0 [ 17.272051][ T310] fuse_release+0x134/0x1c0 [ 17.272221][ T310] __fput+0x35c/0xa80 [ 17.272349][ T310] task_work_run+0x134/0x220 [ 17.272520][ T310] do_exit+0x594/0xe90 [ 17.272650][ T310] do_group_exit+0xb8/0x260 [ 17.272820][ T310] __x64_sys_exit_group+0x3e/0x50 [ 17.272992][ T310] x64_sys_call+0xf76/0x18a0 [ 17.273161][ T310] do_syscall_64+0xc1/0x380 [ 17.273330][ T310] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.273545][ T310] [ 17.273632][ T310] Freed by task 51: [ 17.273785][ T310] kasan_save_stack+0x24/0x50 [ 17.273965][ T310] kasan_save_track+0x14/0x30 [ 17.274140][ T310] kasan_save_free_info+0x3b/0x60 [ 17.274318][ T310] __kasan_slab_free+0x38/0x50 [ 17.274495][ T310] kfree+0x144/0x320 [ 17.274627][ T310] detach_buf_split+0x48d/0x6f0 [ 17.274803][ T310] virtqueue_get_buf_ctx_split+0x294/0x7f0 [ 17.275033][ T310] virtio_fs_requests_done_work+0x231/0x890 [ 17.275242][ T310] process_one_work+0xe43/0x1660 [ 17.275413][ T310] worker_thread+0x591/0xcf0 [ 17.275581][ T310] kthread+0x37b/0x600 [ 17.275711][ T310] ret_from_fork+0x243/0x320 [ 17.275880][ T310] ret_from_fork_asm+0x1a/0x30 [ 17.276050][ T310] [ 17.276135][ T310] The buggy address belongs to the object at ffff888001932720 [ 17.276135][ T310] which belongs to the cache kmalloc-96 of size 96 [ 17.276586][ T310] The buggy address is located 0 bytes inside of [ 17.276586][ T310] freed 96-byte region [ffff888001932720, ffff888001932780) [ 17.277013][ T310] [ 17.277104][ T310] The buggy address belongs to the physical page: [ 17.277319][ T310] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1932 [ 17.277646][ T310] flags: 0x80000000000000(node=0|zone=1) [ 17.277836][ T310] page_type: f5(slab) [ 17.277984][ T310] raw: 0080000000000000 ffff888001042340 ffffea0000134cd0 ffffea0000097050 [ 17.278319][ T310] raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 [ 17.278636][ T310] page dumped because: kasan: bad access detected [ 17.278858][ T310] [ 17.278945][ T310] Memory state around the buggy address: [ 17.279115][ T310] ffff888001932600: fc fc fc fc 00 00 00 00 00 00 00 00 00 fc fc fc [ 17.279402][ T310] ffff888001932680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.279661][ T310] >ffff888001932700: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 17.279938][ T310] ^ [ 17.280110][ T310] ffff888001932780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.280364][ T310] ffff888001932800: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 fc [ 17.280624][ T310] ================================================================== [ 17.281381][ T310] Disabling lock debugging due to kernel taint HARD STOP (79.891494) WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr