syzkaller login: [ 33.687461] BUG: Bad rss-counter state mm:0000000047df0ae2 type:MM_FILEPAGES val:33 [ 33.689209] BUG: Bad rss-counter state mm:0000000047df0ae2 type:MM_ANONPAGES val:22 [ 33.860990] ================================================================== [ 33.861903] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.862826] Read of size 8 at addr ffff88800f61a3f8 by task sshd/220 [ 33.863595] [ 33.863807] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.864804] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.865775] Call Trace: [ 33.866096] [ 33.866378] dump_stack_lvl+0x91/0xf0 [ 33.866876] print_report+0xcc/0x620 [ 33.867373] ? __virt_addr_valid+0x102/0x340 [ 33.867923] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.868532] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.869142] kasan_report+0xbe/0xf0 [ 33.869619] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.870245] vma_interval_tree_remove+0xc75/0xec0 [ 33.870844] vma_prepare+0xc54/0x11a0 [ 33.871332] __split_vma+0x5af/0x950 [ 33.871802] ? __pfx___split_vma+0x10/0x10 [ 33.872331] ? find_held_lock+0x2c/0x110 [ 33.872855] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.873421] ? lock_is_held_type+0x9f/0x120 [ 33.873951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.874548] ? mtree_range_walk+0x632/0x900 [ 33.875116] ? mas_walk+0x5c7/0x7c0 [ 33.875589] do_vmi_munmap+0x1f1/0x2b0 [ 33.876081] mmap_region+0x1f9/0x2660 [ 33.876558] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.877066] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.877796] ? __pfx_lock_acquire+0x10/0x10 [ 33.878328] ? __pfx_mmap_region+0x10/0x10 [ 33.878848] ? security_mmap_addr+0x7d/0xa0 [ 33.879387] ? get_unmapped_area+0x1f5/0x3f0 [ 33.879945] do_mmap+0x854/0xf00 [ 33.880383] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.880873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.881448] ksys_mmap_pgoff+0x3af/0x500 [ 33.881960] do_syscall_64+0x3f/0x90 [ 33.882433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.883086] RIP: 0033:0x7f9fe92eed82 [ 33.883546] 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 [ 33.885667] RSP: 002b:00007ffffc61b878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.886582] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fe92eed82 [ 33.887450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fe8728000 [ 33.888311] RBP: 00007f9fe8728000 R08: 0000000000000009 R09: 0000000000001000 [ 33.889156] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a4077dec0 [ 33.890011] R13: 00007ffffc61b890 R14: 00007ffffc61b8c0 R15: 00007ffffc61bc20 [ 33.890866] [ 33.891174] [ 33.891396] Allocated by task 213: [ 33.891820] kasan_save_stack+0x22/0x50 [ 33.892325] kasan_set_track+0x25/0x30 [ 33.892813] __kasan_slab_alloc+0x59/0x70 [ 33.893341] kmem_cache_alloc+0x16b/0x370 [ 33.893858] vm_area_dup+0x20/0x160 [ 33.894313] __split_vma+0x170/0x950 [ 33.894783] split_vma+0xc6/0x110 [ 33.895230] mprotect_fixup+0x8d2/0xb30 [ 33.895732] do_mprotect_pkey+0x87e/0xd40 [ 33.896258] __x64_sys_mprotect+0x78/0xc0 [ 33.896783] do_syscall_64+0x3f/0x90 [ 33.897257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.897897] [ 33.898113] Freed by task 203: [ 33.898502] kasan_save_stack+0x22/0x50 [ 33.898998] kasan_set_track+0x25/0x30 [ 33.899694] kasan_save_free_info+0x2b/0x50 [ 33.900366] __kasan_slab_free+0x10a/0x190 [ 33.901019] kmem_cache_free+0x10d/0x4d0 [ 33.901641] rcu_core+0x8c8/0x2860 [ 33.902192] __do_softirq+0x1b7/0x7d4 [ 33.902789] [ 33.903070] Last potentially related work creation: [ 33.903791] kasan_save_stack+0x22/0x50 [ 33.904414] __kasan_record_aux_stack+0x8e/0xa0 [ 33.905117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.905920] remove_vma+0x139/0x170 [ 33.906477] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.907211] do_vmi_munmap+0x1f1/0x2b0 [ 33.907704] __vm_munmap+0x138/0x3a0 [ 33.908177] __x64_sys_munmap+0x59/0x80 [ 33.908672] do_syscall_64+0x3f/0x90 [ 33.909154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.909801] [ 33.910016] The buggy address belongs to the object at ffff88800f61a3a0 [ 33.910016] which belongs to the cache vm_area_struct of size 168 [ 33.911499] The buggy address is located 88 bytes inside of [ 33.911499] freed 168-byte region [ffff88800f61a3a0, ffff88800f61a448) [ 33.912911] [ 33.913133] The buggy address belongs to the physical page: [ 33.913793] page:00000000d3d5145c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf61a [ 33.914878] memcg:ffff88801037c301 [ 33.915319] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.915966] page_type: 0xffffffff() [ 33.916426] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.917347] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801037c301 [ 33.918261] page dumped because: kasan: bad access detected [ 33.918937] [ 33.919175] Memory state around the buggy address: [ 33.919759] ffff88800f61a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.920622] ffff88800f61a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.921482] >ffff88800f61a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.922346] ^ [ 33.923206] ffff88800f61a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.924067] ffff88800f61a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.924925] ================================================================== [ 33.925943] Disabling lock debugging due to kernel taint [ 35.845486] BUG: Bad rss-counter state mm:000000007da1a17d type:MM_FILEPAGES val:33 [ 35.846688] BUG: Bad rss-counter state mm:000000007da1a17d type:MM_ANONPAGES val:22 [ 36.402073] BUG: Bad rss-counter state mm:000000003662ff5d type:MM_FILEPAGES val:33 [ 36.403255] BUG: Bad rss-counter state mm:000000003662ff5d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14914' (ECDSA) to the list of known hosts. 2023/06/20 04:37:54 fuzzer started 2023/06/20 04:37:54 dialing manager at localhost:44161 2023/06/20 04:37:54 checking machine... 2023/06/20 04:37:54 checking revisions... [ 37.029876] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:37:54 testing simple program... [ 37.078768] cgroup: Unknown subsys name 'net' [ 37.119241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:37:50 Registers: info registers vcpu 0 RAX=0000000000000012 RBX=ffffffff85dc2808 RCX=ffffffff813fc5a5 RDX=0000000000000000 RSI=ffffffff860e01f0 RDI=ffffffff85dc27ec RBP=ffffffff85dc2808 RSP=ffff88806ce098b0 R8 =ffffffff860e01f0 R9 =ffff88806ce099a8 R10=0000000000038001 R11=0000000000012506 R12=ffffffff85dc2804 R13=ffffffff85dc27ec R14=0000000000000006 R15=dffffc0000000000 RIP=ffffffff8112fcaf RFL=00000016 [----AP-] 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 00007f0522f41700 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=00007f47823b8618 CR3=000000000d9ce000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732034353a3733 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363239 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=0000000000000007 RBX=0000000000000002 RCX=ffffffff810bd032 RDX=0000000000000007 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffff88806cf09af0 RSP=ffff88806cf099c0 R8 =ffffffff86088c1a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc16 RFL=00000212 [----A--] 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=00007f1ca4e30000 CR3=000000000d9ce000 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=2034353a37333a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a37333a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000