[ 62.336499] sshd (211) used greatest stack depth: 23992 bytes left [ 62.338186] BUG: Bad rss-counter state mm:00000000947846bc type:MM_FILEPAGES val:33 [ 62.339389] BUG: Bad rss-counter state mm:00000000947846bc type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.505186] ================================================================== [ 62.506114] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.507113] Read of size 8 at addr ffff88800ecaded8 by task sshd/218 [ 62.507966] [ 62.508209] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.509097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.510080] Call Trace: [ 62.510430] [ 62.510715] dump_stack_lvl+0x91/0xf0 [ 62.511210] print_report+0xcc/0x620 [ 62.511706] ? __virt_addr_valid+0x102/0x340 [ 62.512257] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.512884] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.513525] kasan_report+0xbe/0xf0 [ 62.514026] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.514685] vma_interval_tree_remove+0xc75/0xec0 [ 62.515304] vma_prepare+0xc54/0x11a0 [ 62.515800] __split_vma+0x5af/0x950 [ 62.516303] ? __pfx___split_vma+0x10/0x10 [ 62.516852] ? find_held_lock+0x2c/0x110 [ 62.517372] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.517944] ? lock_is_held_type+0x9f/0x120 [ 62.518496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.519103] ? mtree_range_walk+0x632/0x900 [ 62.519650] ? mas_walk+0x5c7/0x7c0 [ 62.520126] do_vmi_munmap+0x1f1/0x2b0 [ 62.520624] mmap_region+0x1f9/0x2660 [ 62.521129] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.521677] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.522433] ? __pfx_lock_acquire+0x10/0x10 [ 62.522981] ? __pfx_mmap_region+0x10/0x10 [ 62.523523] ? security_mmap_addr+0x7d/0xa0 [ 62.524084] ? get_unmapped_area+0x1f5/0x3f0 [ 62.524649] do_mmap+0x854/0xf00 [ 62.525111] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.525620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.526204] ksys_mmap_pgoff+0x3af/0x500 [ 62.526737] do_syscall_64+0x3f/0x90 [ 62.527218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.527871] RIP: 0033:0x7f8d84e6fd82 [ 62.528342] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 62.530578] RSP: 002b:00007ffdfe8be3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.531522] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d84e6fd82 [ 62.532403] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d842a9000 [ 62.533282] RBP: 00007f8d842a9000 R08: 0000000000000009 R09: 0000000000001000 [ 62.534162] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e51931ec0 [ 62.535048] R13: 00007ffdfe8be400 R14: 00007ffdfe8be430 R15: 00007ffdfe8be790 [ 62.535936] [ 62.536249] [ 62.536469] Allocated by task 211: [ 62.536913] kasan_save_stack+0x22/0x50 [ 62.537432] kasan_set_track+0x25/0x30 [ 62.537952] __kasan_slab_alloc+0x59/0x70 [ 62.538505] kmem_cache_alloc+0x16b/0x370 [ 62.539016] vm_area_dup+0x20/0x160 [ 62.539483] __split_vma+0x170/0x950 [ 62.539949] split_vma+0xc6/0x110 [ 62.540394] mprotect_fixup+0x8d2/0xb30 [ 62.540893] do_mprotect_pkey+0x87e/0xd40 [ 62.541423] __x64_sys_mprotect+0x78/0xc0 [ 62.541946] do_syscall_64+0x3f/0x90 [ 62.542453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.543101] [ 62.543318] Freed by task 211: [ 62.543719] kasan_save_stack+0x22/0x50 [ 62.544233] kasan_set_track+0x25/0x30 [ 62.544729] kasan_save_free_info+0x2b/0x50 [ 62.545274] __kasan_slab_free+0x10a/0x190 [ 62.545818] kmem_cache_free+0x10d/0x4d0 [ 62.546338] rcu_core+0x8c8/0x2860 [ 62.546789] __do_softirq+0x1b7/0x7d4 [ 62.547283] [ 62.547499] Last potentially related work creation: [ 62.548098] kasan_save_stack+0x22/0x50 [ 62.548604] __kasan_record_aux_stack+0x8e/0xa0 [ 62.549178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.549829] remove_vma+0x139/0x170 [ 62.550307] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.550874] do_vmi_munmap+0x1f1/0x2b0 [ 62.551363] __vm_munmap+0x138/0x3a0 [ 62.551835] __x64_sys_munmap+0x59/0x80 [ 62.552334] do_syscall_64+0x3f/0x90 [ 62.552813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.553467] [ 62.553684] Second to last potentially related work creation: [ 62.554385] kasan_save_stack+0x22/0x50 [ 62.554893] __kasan_record_aux_stack+0x8e/0xa0 [ 62.555476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.556126] remove_vma+0x139/0x170 [ 62.556590] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.557150] do_vmi_munmap+0x1f1/0x2b0 [ 62.557644] __vm_munmap+0x138/0x3a0 [ 62.558115] elf_map+0x26f/0x310 [ 62.558569] load_elf_binary+0xd82/0x5030 [ 62.559101] bprm_execve+0x803/0x1940 [ 62.559579] do_execveat_common+0x734/0x8e0 [ 62.560111] __x64_sys_execve+0x93/0xc0 [ 62.560612] do_syscall_64+0x3f/0x90 [ 62.561092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.561735] [ 62.561956] The buggy address belongs to the object at ffff88800ecade80 [ 62.561956] which belongs to the cache vm_area_struct of size 168 [ 62.563452] The buggy address is located 88 bytes inside of [ 62.563452] freed 168-byte region [ffff88800ecade80, ffff88800ecadf28) [ 62.564889] [ 62.565106] The buggy address belongs to the physical page: [ 62.565772] page:000000007f2532a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecad [ 62.566887] memcg:ffff88800ca21f01 [ 62.567325] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 62.568030] page_type: 0xffffffff() [ 62.568488] raw: 0100000000000200 ffff88800879fc80 ffffea00004fb740 dead000000000003 [ 62.569417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca21f01 [ 62.570354] page dumped because: kasan: bad access detected [ 62.571024] [ 62.571240] Memory state around the buggy address: [ 62.571829] ffff88800ecadd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 62.572706] ffff88800ecade00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 62.573590] >ffff88800ecade80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.574474] ^ [ 62.575207] ffff88800ecadf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 62.576071] ffff88800ecadf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 62.576935] ================================================================== [ 62.577952] Disabling lock debugging due to kernel taint [ 64.512225] BUG: Bad rss-counter state mm:000000005ffa917e type:MM_FILEPAGES val:33 [ 64.513215] BUG: Bad rss-counter state mm:000000005ffa917e type:MM_ANONPAGES val:22 [ 64.984173] BUG: Bad rss-counter state mm:00000000027015aa type:MM_FILEPAGES val:33 [ 64.985166] BUG: Bad rss-counter state mm:00000000027015aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9811' (ECDSA) to the list of known hosts. 2023/06/19 19:40:38 fuzzer started 2023/06/19 19:40:38 dialing manager at localhost:44161 2023/06/19 19:40:38 checking machine... 2023/06/19 19:40:38 checking revisions... [ 65.780001] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:40:38 testing simple program... [ 65.833231] cgroup: Unknown subsys name 'net' [ 65.876896] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:40:36 Registers: info registers vcpu 0 RAX=ffffffff8614755b RBX=0000000000000001 RCX=ffffffff86147558 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8614755a RBP=ffff888006807858 RSP=ffff888006807790 R8 =0000000000000001 R9 =ffff888006807840 R10=0000000000038001 R11=0000000000023842 R12=ffff888006807860 R13=ffff888006807848 R14=ffff888006807c18 R15=ffff888006807800 RIP=ffffffff811311ed RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f21679e2900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f2166e48240 CR3=00000000094c8000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c75f4840288d377000000000000ae988 XMM05=2b3c8a4b333d34350000000000136268 XMM06=dfcdbad4f1609c370000000000134d90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800ab68980 RCX=ffff88800ab68980 RDX=00000000000d000d RSI=ffff88800ab68980 RDI=ffff88800844f780 RBP=ffff888016f57a28 RSP=ffff888016f57990 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea00002ada00 R11=00000000800c0007 R12=ffffea00002ada00 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff818094f2 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb159992900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffebc5a5000 CR3=000000000fcb4000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000