syzkaller login: [ 69.332129] BUG: Bad rss-counter state mm:0000000082d2e46f type:MM_FILEPAGES val:33 [ 69.333106] BUG: Bad rss-counter state mm:0000000082d2e46f type:MM_ANONPAGES val:22 [ 69.495989] ================================================================== [ 69.496887] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.497799] Read of size 8 at addr ffff88800c5cbed8 by task sshd/229 [ 69.498630] [ 69.498844] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 69.499710] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.500687] Call Trace: [ 69.501011] [ 69.501291] dump_stack_lvl+0x91/0xf0 [ 69.501778] print_report+0xcc/0x620 [ 69.502260] ? __virt_addr_valid+0x102/0x340 [ 69.502811] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.503449] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.504061] kasan_report+0xbe/0xf0 [ 69.504532] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.505142] vma_interval_tree_remove+0xc75/0xec0 [ 69.505747] vma_prepare+0xc54/0x11a0 [ 69.506230] __split_vma+0x5af/0x950 [ 69.506697] ? __pfx___split_vma+0x10/0x10 [ 69.507227] ? find_held_lock+0x2c/0x110 [ 69.507739] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.508290] ? lock_is_held_type+0x9f/0x120 [ 69.508820] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.509420] ? mtree_range_walk+0x632/0x900 [ 69.509968] ? mas_walk+0x5c7/0x7c0 [ 69.510437] do_vmi_munmap+0x1f1/0x2b0 [ 69.510938] mmap_region+0x1f9/0x2660 [ 69.511417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.511919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.512625] ? __pfx_lock_acquire+0x10/0x10 [ 69.513169] ? __pfx_mmap_region+0x10/0x10 [ 69.513706] ? security_mmap_addr+0x7d/0xa0 [ 69.514225] ? get_unmapped_area+0x1f5/0x3f0 [ 69.514764] do_mmap+0x854/0xf00 [ 69.515222] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.515718] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.516277] ksys_mmap_pgoff+0x3af/0x500 [ 69.516783] do_syscall_64+0x3f/0x90 [ 69.517253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.517891] RIP: 0033:0x7fdd6102dd82 [ 69.518343] 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 [ 69.520459] RSP: 002b:00007fff05c5df88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.521356] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd6102dd82 [ 69.522199] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd60467000 [ 69.523048] RBP: 00007fdd60467000 R08: 0000000000000009 R09: 0000000000001000 [ 69.523893] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647df3acec0 [ 69.524732] R13: 00007fff05c5dfa0 R14: 00007fff05c5dfd0 R15: 00007fff05c5e330 [ 69.525590] [ 69.525877] [ 69.526089] Allocated by task 221: [ 69.526513] kasan_save_stack+0x22/0x50 [ 69.527027] kasan_set_track+0x25/0x30 [ 69.527512] __kasan_slab_alloc+0x59/0x70 [ 69.528027] kmem_cache_alloc+0x16b/0x370 [ 69.528532] vm_area_dup+0x20/0x160 [ 69.528989] __split_vma+0x170/0x950 [ 69.529450] split_vma+0xc6/0x110 [ 69.529895] mprotect_fixup+0x8d2/0xb30 [ 69.530393] do_mprotect_pkey+0x87e/0xd40 [ 69.530923] __x64_sys_mprotect+0x78/0xc0 [ 69.531442] do_syscall_64+0x3f/0x90 [ 69.531909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.532538] [ 69.532752] Freed by task 221: [ 69.533140] kasan_save_stack+0x22/0x50 [ 69.533638] kasan_set_track+0x25/0x30 [ 69.534123] kasan_save_free_info+0x2b/0x50 [ 69.534650] __kasan_slab_free+0x10a/0x190 [ 69.535195] kmem_cache_free+0x10d/0x4d0 [ 69.535698] rcu_core+0x8c8/0x2860 [ 69.536135] __do_softirq+0x1b7/0x7d4 [ 69.536602] [ 69.536814] Last potentially related work creation: [ 69.537387] kasan_save_stack+0x22/0x50 [ 69.537880] __kasan_record_aux_stack+0x8e/0xa0 [ 69.538446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.539089] remove_vma+0x139/0x170 [ 69.539537] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.540083] do_vmi_munmap+0x1f1/0x2b0 [ 69.540565] __vm_munmap+0x138/0x3a0 [ 69.541024] __x64_sys_munmap+0x59/0x80 [ 69.541514] do_syscall_64+0x3f/0x90 [ 69.541978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.542613] [ 69.542826] The buggy address belongs to the object at ffff88800c5cbe80 [ 69.542826] which belongs to the cache vm_area_struct of size 168 [ 69.544301] The buggy address is located 88 bytes inside of [ 69.544301] freed 168-byte region [ffff88800c5cbe80, ffff88800c5cbf28) [ 69.545680] [ 69.545893] The buggy address belongs to the physical page: [ 69.546543] page:000000006bc8f9e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5cb [ 69.547618] memcg:ffff8880096f6001 [ 69.548040] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.548672] page_type: 0xffffffff() [ 69.549115] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 69.550016] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096f6001 [ 69.550925] page dumped because: kasan: bad access detected [ 69.551576] [ 69.551789] Memory state around the buggy address: [ 69.552372] ffff88800c5cbd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.553212] ffff88800c5cbe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 69.554055] >ffff88800c5cbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.554911] ^ [ 69.555630] ffff88800c5cbf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 69.556469] ffff88800c5cbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.557315] ================================================================== [ 69.558420] Disabling lock debugging due to kernel taint [ 72.029131] BUG: Bad rss-counter state mm:00000000ef43788a type:MM_FILEPAGES val:33 [ 72.030439] BUG: Bad rss-counter state mm:00000000ef43788a type:MM_ANONPAGES val:22 [ 72.497409] BUG: Bad rss-counter state mm:00000000bc5d4ad7 type:MM_FILEPAGES val:33 [ 72.498467] BUG: Bad rss-counter state mm:00000000bc5d4ad7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45027' (ECDSA) to the list of known hosts. 2023/06/19 23:22:15 fuzzer started 2023/06/19 23:22:15 dialing manager at localhost:44161 2023/06/19 23:22:15 checking machine... 2023/06/19 23:22:15 checking revisions... [ 73.218142] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:22:16 testing simple program... [ 73.266858] cgroup: Unknown subsys name 'net' [ 73.303691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:22:14 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818a3288 RDI=dffffc0000000000 RBP=000000068dd0c0d9 RSP=ffff8880147f75c0 R8 =0000000000000001 R9 =000000000000002e R10=0000000000000073 R11=0000000000000001 R12=ffff8880147f778c R13=9b4bc99803755591 R14=ffff8880147f7750 R15=ffff88801613e635 RIP=ffffffff818a32ba 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 00007f18784dc900 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=00007f5329af8650 CR3=000000000cbe4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=86801c65ae96dd1900000000000ae988 XMM05=2726622cf7d6cb5e00000000001360e8 XMM06=ca195ef1fc1c3db60000000000134e88 XMM07=fb795ef6d65770560000000000124880 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fff8a1da918 CR3=0000000005482000 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=00007f2401325510000055591b835790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000