syzkaller login: [ 43.866603] BUG: Bad rss-counter state mm:000000001a172636 type:MM_FILEPAGES val:33 [ 43.867167] BUG: Bad rss-counter state mm:000000001a172636 type:MM_ANONPAGES val:22 [ 43.906746] ================================================================== [ 43.907652] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.908585] Read of size 8 at addr ffff88800e4f76b0 by task sshd/220 [ 43.909411] [ 43.909625] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.910475] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.911429] Call Trace: [ 43.911750] [ 43.912031] dump_stack_lvl+0x91/0xf0 [ 43.912514] print_report+0xcc/0x620 [ 43.912995] ? __virt_addr_valid+0x102/0x340 [ 43.913534] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.914142] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.914748] kasan_report+0xbe/0xf0 [ 43.915218] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.915839] vma_interval_tree_remove+0xc75/0xec0 [ 43.916431] vma_prepare+0xc54/0x11a0 [ 43.916903] __split_vma+0x5af/0x950 [ 43.917370] ? __pfx___split_vma+0x10/0x10 [ 43.917886] ? find_held_lock+0x2c/0x110 [ 43.918398] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.918956] ? lock_is_held_type+0x9f/0x120 [ 43.919486] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.920099] ? mtree_range_walk+0x632/0x900 [ 43.920648] ? mas_walk+0x5c7/0x7c0 [ 43.921117] do_vmi_munmap+0x1f1/0x2b0 [ 43.921607] mmap_region+0x1f9/0x2660 [ 43.922081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.922589] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.923294] ? __pfx_lock_acquire+0x10/0x10 [ 43.923828] ? __pfx_mmap_region+0x10/0x10 [ 43.924347] ? security_mmap_addr+0x7d/0xa0 [ 43.924869] ? get_unmapped_area+0x1f5/0x3f0 [ 43.925416] do_mmap+0x854/0xf00 [ 43.925848] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.926338] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.926891] ksys_mmap_pgoff+0x3af/0x500 [ 43.927390] do_syscall_64+0x3f/0x90 [ 43.927873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.928508] RIP: 0033:0x7fa540052d82 [ 43.928961] 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 [ 43.931064] RSP: 002b:00007fff489d9248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.931982] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa540052d82 [ 43.932816] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa53f48c000 [ 43.933659] RBP: 00007fa53f48c000 R08: 0000000000000009 R09: 0000000000001000 [ 43.934493] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e7ca08b20 [ 43.935333] R13: 00007fff489d9260 R14: 00007fff489d9290 R15: 00007fff489d95f0 [ 43.936189] [ 43.936482] [ 43.936695] Allocated by task 213: [ 43.937125] kasan_save_stack+0x22/0x50 [ 43.937632] kasan_set_track+0x25/0x30 [ 43.938124] __kasan_slab_alloc+0x59/0x70 [ 43.938649] kmem_cache_alloc+0x16b/0x370 [ 43.939159] vm_area_dup+0x20/0x160 [ 43.939625] __split_vma+0x170/0x950 [ 43.940088] split_vma+0xc6/0x110 [ 43.940530] mprotect_fixup+0x8d2/0xb30 [ 43.941029] do_mprotect_pkey+0x87e/0xd40 [ 43.941546] __x64_sys_mprotect+0x78/0xc0 [ 43.942059] do_syscall_64+0x3f/0x90 [ 43.942529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.943172] [ 43.943385] Freed by task 213: [ 43.943796] kasan_save_stack+0x22/0x50 [ 43.944299] kasan_set_track+0x25/0x30 [ 43.944806] kasan_save_free_info+0x2b/0x50 [ 43.945379] __kasan_slab_free+0x10a/0x190 [ 43.945925] kmem_cache_free+0x10d/0x4d0 [ 43.946448] rcu_core+0x8c8/0x2860 [ 43.946904] __do_softirq+0x1b7/0x7d4 [ 43.947392] [ 43.947621] Last potentially related work creation: [ 43.948223] kasan_save_stack+0x22/0x50 [ 43.948735] __kasan_record_aux_stack+0x8e/0xa0 [ 43.949323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.949977] remove_vma+0x139/0x170 [ 43.950442] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.951019] do_vmi_munmap+0x1f1/0x2b0 [ 43.951514] __vm_munmap+0x138/0x3a0 [ 43.952016] __x64_sys_munmap+0x59/0x80 [ 43.952525] do_syscall_64+0x3f/0x90 [ 43.953008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.953674] [ 43.953896] Second to last potentially related work creation: [ 43.954600] kasan_save_stack+0x22/0x50 [ 43.955117] __kasan_record_aux_stack+0x8e/0xa0 [ 43.955710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.956371] remove_vma+0x139/0x170 [ 43.956839] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.957410] do_vmi_munmap+0x1f1/0x2b0 [ 43.957910] __vm_munmap+0x138/0x3a0 [ 43.958390] elf_map+0x26f/0x310 [ 43.958848] load_elf_binary+0xd82/0x5030 [ 43.959385] bprm_execve+0x803/0x1940 [ 43.959889] do_execveat_common+0x734/0x8e0 [ 43.960431] __x64_sys_execve+0x93/0xc0 [ 43.960933] do_syscall_64+0x3f/0x90 [ 43.961409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.962039] [ 43.962256] The buggy address belongs to the object at ffff88800e4f7658 [ 43.962256] which belongs to the cache vm_area_struct of size 168 [ 43.963709] The buggy address is located 88 bytes inside of [ 43.963709] freed 168-byte region [ffff88800e4f7658, ffff88800e4f7700) [ 43.965092] [ 43.965307] The buggy address belongs to the physical page: [ 43.965958] page:000000003c0527d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4f7 [ 43.967020] memcg:ffff88800e5f5101 [ 43.967441] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.968136] page_type: 0xffffffff() [ 43.968579] raw: 0100000000000200 ffff88800879fc80 ffffea000038e2c0 dead000000000005 [ 43.969484] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5f5101 [ 43.970373] page dumped because: kasan: bad access detected [ 43.971022] [ 43.971236] Memory state around the buggy address: [ 43.971810] ffff88800e4f7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.972648] ffff88800e4f7600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 43.973490] >ffff88800e4f7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.974327] ^ [ 43.974900] ffff88800e4f7700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 43.975744] ffff88800e4f7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 43.976583] ================================================================== [ 43.977536] Disabling lock debugging due to kernel taint [ 45.623099] BUG: Bad rss-counter state mm:00000000f69debc8 type:MM_FILEPAGES val:33 [ 45.624271] BUG: Bad rss-counter state mm:00000000f69debc8 type:MM_ANONPAGES val:22 [ 46.078219] BUG: Bad rss-counter state mm:000000002b87ad9a type:MM_FILEPAGES val:33 [ 46.079388] BUG: Bad rss-counter state mm:000000002b87ad9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54037' (ECDSA) to the list of known hosts. 2023/06/20 08:00:16 fuzzer started 2023/06/20 08:00:16 dialing manager at localhost:44161 2023/06/20 08:00:16 checking machine... 2023/06/20 08:00:16 checking revisions... [ 46.726414] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:00:16 testing simple program... [ 46.780879] cgroup: Unknown subsys name 'net' [ 46.820739] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:00:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007f2816498830 CR3=000000000d984000 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=30303a3830203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323334 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016aaf1b8 RCX=0000000000000001 RDX=1ffff11002d55e50 RSI=ffffffff844c1d8e RDI=ffff888016aaf1c4 RBP=ffff888016aaf280 RSP=ffff888016aaf0d0 R8 =0000000000000001 R9 =ffff888016aaf130 R10=0000000000038001 R11=00000000000b3ea1 R12=ffff888016aaf1b8 R13=0000000000000000 R14=ffff88800fdb0000 R15=ffff88800e7ac130 RIP=ffffffff813ad4f7 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 00007f3f40b71900 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=00007f3f40b3b008 CR3=000000000cfd4000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000