syzkaller login: [ 31.756421] BUG: Bad rss-counter state mm:00000000693308b8 type:MM_FILEPAGES val:33 [ 31.757621] BUG: Bad rss-counter state mm:00000000693308b8 type:MM_ANONPAGES val:22 [ 31.793584] ================================================================== [ 31.794548] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.795490] Read of size 8 at addr ffff888009a36880 by task sshd/219 [ 31.796357] [ 31.796580] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.797455] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.798481] Call Trace: [ 31.798812] [ 31.799101] dump_stack_lvl+0x91/0xf0 [ 31.799603] print_report+0xcc/0x620 [ 31.800123] ? __virt_addr_valid+0x102/0x340 [ 31.800687] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.801322] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.801940] kasan_report+0xbe/0xf0 [ 31.802415] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.803039] vma_interval_tree_remove+0xc75/0xec0 [ 31.803638] vma_prepare+0xc54/0x11a0 [ 31.804126] __split_vma+0x5af/0x950 [ 31.804603] ? __pfx___split_vma+0x10/0x10 [ 31.805142] ? find_held_lock+0x2c/0x110 [ 31.805660] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.806228] ? lock_is_held_type+0x9f/0x120 [ 31.806772] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.807388] ? mtree_range_walk+0x632/0x900 [ 31.807945] ? mas_walk+0x5c7/0x7c0 [ 31.808433] do_vmi_munmap+0x1f1/0x2b0 [ 31.808929] mmap_region+0x1f9/0x2660 [ 31.809415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.809933] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.810653] ? __pfx_lock_acquire+0x10/0x10 [ 31.811185] ? __pfx_mmap_region+0x10/0x10 [ 31.811724] ? security_mmap_addr+0x7d/0xa0 [ 31.812281] ? get_unmapped_area+0x1f5/0x3f0 [ 31.812842] do_mmap+0x854/0xf00 [ 31.813284] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.813784] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.814354] ksys_mmap_pgoff+0x3af/0x500 [ 31.814870] do_syscall_64+0x3f/0x90 [ 31.815356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.816020] RIP: 0033:0x7fee3b3ded82 [ 31.816490] 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 [ 31.818646] RSP: 002b:00007ffd1d9eaf68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.819565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee3b3ded82 [ 31.820440] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee3a818000 [ 31.821294] RBP: 00007fee3a818000 R08: 0000000000000009 R09: 0000000000001000 [ 31.822142] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4d5c30f60 [ 31.822997] R13: 00007ffd1d9eaf80 R14: 00007ffd1d9eafb0 R15: 00007ffd1d9eb310 [ 31.823860] [ 31.824160] [ 31.824377] Allocated by task 212: [ 31.824811] kasan_save_stack+0x22/0x50 [ 31.825332] kasan_set_track+0x25/0x30 [ 31.825830] __kasan_slab_alloc+0x59/0x70 [ 31.826364] kmem_cache_alloc+0x16b/0x370 [ 31.826881] vm_area_dup+0x20/0x160 [ 31.827347] __split_vma+0x170/0x950 [ 31.827833] split_vma+0xc6/0x110 [ 31.828305] mprotect_fixup+0x8d2/0xb30 [ 31.828833] do_mprotect_pkey+0x87e/0xd40 [ 31.829372] __x64_sys_mprotect+0x78/0xc0 [ 31.829906] do_syscall_64+0x3f/0x90 [ 31.830391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.831053] [ 31.831271] Freed by task 212: [ 31.831680] kasan_save_stack+0x22/0x50 [ 31.832202] kasan_set_track+0x25/0x30 [ 31.832713] kasan_save_free_info+0x2b/0x50 [ 31.833260] __kasan_slab_free+0x10a/0x190 [ 31.833814] kmem_cache_free+0x10d/0x4d0 [ 31.834329] rcu_core+0x8c8/0x2860 [ 31.834779] __do_softirq+0x1b7/0x7d4 [ 31.835272] [ 31.835486] Last potentially related work creation: [ 31.836085] kasan_save_stack+0x22/0x50 [ 31.836622] __kasan_record_aux_stack+0x8e/0xa0 [ 31.837213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.837867] remove_vma+0x139/0x170 [ 31.838332] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.838889] do_vmi_munmap+0x1f1/0x2b0 [ 31.839384] __vm_munmap+0x138/0x3a0 [ 31.839862] __x64_sys_munmap+0x59/0x80 [ 31.840369] do_syscall_64+0x3f/0x90 [ 31.840848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.841500] [ 31.841716] Second to last potentially related work creation: [ 31.842413] kasan_save_stack+0x22/0x50 [ 31.842933] __kasan_record_aux_stack+0x8e/0xa0 [ 31.843529] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.844212] remove_vma+0x139/0x170 [ 31.844675] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.845244] do_vmi_munmap+0x1f1/0x2b0 [ 31.845740] mmap_region+0x1f9/0x2660 [ 31.846221] do_mmap+0x854/0xf00 [ 31.846658] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.847158] ksys_mmap_pgoff+0x3af/0x500 [ 31.847670] do_syscall_64+0x3f/0x90 [ 31.848183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.848839] [ 31.849059] The buggy address belongs to the object at ffff888009a36828 [ 31.849059] which belongs to the cache vm_area_struct of size 168 [ 31.850569] The buggy address is located 88 bytes inside of [ 31.850569] freed 168-byte region [ffff888009a36828, ffff888009a368d0) [ 31.852003] [ 31.852231] The buggy address belongs to the physical page: [ 31.852910] page:00000000d90f3835 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a36 [ 31.853998] memcg:ffff8880181b9c01 [ 31.854440] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.855164] page_type: 0xffffffff() [ 31.855621] raw: 0100000000000200 ffff8880087a0c80 ffffea00003add80 dead000000000007 [ 31.856591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880181b9c01 [ 31.857516] page dumped because: kasan: bad access detected [ 31.858209] [ 31.858428] Memory state around the buggy address: [ 31.859030] ffff888009a36780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.859910] ffff888009a36800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.860791] >ffff888009a36880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.861657] ^ [ 31.862074] ffff888009a36900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.862945] ffff888009a36980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.863812] ================================================================== [ 31.864886] Disabling lock debugging due to kernel taint [ 34.662423] BUG: Bad rss-counter state mm:00000000f4cad9a6 type:MM_FILEPAGES val:33 [ 34.664007] BUG: Bad rss-counter state mm:00000000f4cad9a6 type:MM_ANONPAGES val:22 [ 35.153015] BUG: Bad rss-counter state mm:0000000001aed91d type:MM_FILEPAGES val:33 [ 35.154090] BUG: Bad rss-counter state mm:0000000001aed91d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1293' (ECDSA) to the list of known hosts. 2023/06/21 02:16:09 fuzzer started 2023/06/21 02:16:09 dialing manager at localhost:36067 2023/06/21 02:16:09 checking machine... 2023/06/21 02:16:09 checking revisions... [ 35.859968] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:16:09 testing simple program... [ 35.912741] cgroup: Unknown subsys name 'net' [ 35.950692] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:16:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffffff0ba7a24 RSI=ffffea000027aa00 RDI=ffffffff85d3d120 RBP=0000000000000000 RSP=ffff88806ce09c40 R8 =0000000000000000 R9 =000000000007ffe0 R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000003 R13=ffffea000027aa00 R14=0000000000009ea8 R15=ffff88807ffdc500 RIP=ffffffff8178963e RFL=00000097 [--S-APC] 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 00007f13813fd700 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=00007fe2de84b9a0 CR3=000000000d8b0000 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=2039303a36313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a36313a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535d53 RSP=ffff888008e37c98 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000202 R13=ffff88800c646760 R14=ffffffff818d9c06 R15=ffff88800e15f700 RIP=ffffffff815343fe RFL=00000047 [---Z-PC] 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 0000000000000000 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=00007f8eda30c008 CR3=000000000da1a000 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