syzkaller login: [ 30.721658] BUG: Bad rss-counter state mm:00000000b31c4c64 type:MM_FILEPAGES val:33 [ 30.723278] BUG: Bad rss-counter state mm:00000000b31c4c64 type:MM_ANONPAGES val:22 [ 30.890007] ================================================================== [ 30.890915] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.891932] Read of size 8 at addr ffff8880198b93f8 by task sshd/221 [ 30.892721] [ 30.892997] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.893893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.894891] Call Trace: [ 30.895268] [ 30.895593] dump_stack_lvl+0x91/0xf0 [ 30.896089] print_report+0xcc/0x620 [ 30.896585] ? __virt_addr_valid+0x102/0x340 [ 30.897146] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.897769] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.898409] kasan_report+0xbe/0xf0 [ 30.898890] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.899588] vma_interval_tree_remove+0xc75/0xec0 [ 30.900203] vma_prepare+0xc54/0x11a0 [ 30.900699] __split_vma+0x5af/0x950 [ 30.901175] ? __pfx___split_vma+0x10/0x10 [ 30.901702] ? find_held_lock+0x2c/0x110 [ 30.902231] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.902806] ? lock_is_held_type+0x9f/0x120 [ 30.903394] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.904036] ? mtree_range_walk+0x632/0x900 [ 30.904592] ? mas_walk+0x5c7/0x7c0 [ 30.905070] do_vmi_munmap+0x1f1/0x2b0 [ 30.905568] mmap_region+0x1f9/0x2660 [ 30.906055] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.906566] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.907353] ? __pfx_lock_acquire+0x10/0x10 [ 30.907931] ? __pfx_mmap_region+0x10/0x10 [ 30.908468] ? security_mmap_addr+0x7d/0xa0 [ 30.909010] ? get_unmapped_area+0x1f5/0x3f0 [ 30.909564] do_mmap+0x854/0xf00 [ 30.910006] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.910513] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.911104] ksys_mmap_pgoff+0x3af/0x500 [ 30.911648] do_syscall_64+0x3f/0x90 [ 30.912141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.912800] RIP: 0033:0x7f8972883d82 [ 30.913259] 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 [ 30.915502] RSP: 002b:00007fff50832fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.916404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8972883d82 [ 30.917260] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8971cbd000 [ 30.918103] RBP: 00007f8971cbd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.918950] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a36afae980 [ 30.919855] R13: 00007fff50833000 R14: 00007fff50833030 R15: 00007fff50833390 [ 30.920715] [ 30.921006] [ 30.921222] Allocated by task 214: [ 30.921650] kasan_save_stack+0x22/0x50 [ 30.922159] kasan_set_track+0x25/0x30 [ 30.922654] __kasan_slab_alloc+0x59/0x70 [ 30.923196] kmem_cache_alloc+0x16b/0x370 [ 30.923754] vm_area_dup+0x20/0x160 [ 30.924222] __split_vma+0x170/0x950 [ 30.924700] split_vma+0xc6/0x110 [ 30.925138] mprotect_fixup+0x8d2/0xb30 [ 30.925639] do_mprotect_pkey+0x87e/0xd40 [ 30.926169] __x64_sys_mprotect+0x78/0xc0 [ 30.926696] do_syscall_64+0x3f/0x90 [ 30.927204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.927886] [ 30.928104] Freed by task 203: [ 30.928493] kasan_save_stack+0x22/0x50 [ 30.929000] kasan_set_track+0x25/0x30 [ 30.929498] kasan_save_free_info+0x2b/0x50 [ 30.930031] __kasan_slab_free+0x10a/0x190 [ 30.930572] kmem_cache_free+0x10d/0x4d0 [ 30.931106] rcu_core+0x8c8/0x2860 [ 30.931595] __do_softirq+0x1b7/0x7d4 [ 30.932130] [ 30.932347] Last potentially related work creation: [ 30.932930] kasan_save_stack+0x22/0x50 [ 30.933433] __kasan_record_aux_stack+0x8e/0xa0 [ 30.934027] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.934668] remove_vma+0x139/0x170 [ 30.935145] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.935741] do_vmi_munmap+0x1f1/0x2b0 [ 30.936234] __vm_munmap+0x138/0x3a0 [ 30.936702] __x64_sys_munmap+0x59/0x80 [ 30.937201] do_syscall_64+0x3f/0x90 [ 30.937676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938318] [ 30.938532] The buggy address belongs to the object at ffff8880198b93a0 [ 30.938532] which belongs to the cache vm_area_struct of size 168 [ 30.940062] The buggy address is located 88 bytes inside of [ 30.940062] freed 168-byte region [ffff8880198b93a0, ffff8880198b9448) [ 30.941505] [ 30.941727] The buggy address belongs to the physical page: [ 30.942396] page:0000000003cce2b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198b9 [ 30.943573] memcg:ffff888015fb4d01 [ 30.944017] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.944693] page_type: 0xffffffff() [ 30.945162] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.946113] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015fb4d01 [ 30.947066] page dumped because: kasan: bad access detected [ 30.947779] [ 30.947999] Memory state around the buggy address: [ 30.948592] ffff8880198b9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.949474] ffff8880198b9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.950340] >ffff8880198b9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.951218] ^ [ 30.952089] ffff8880198b9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.952942] ffff8880198b9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.953793] ================================================================== [ 30.955091] Disabling lock debugging due to kernel taint [ 33.377912] BUG: Bad rss-counter state mm:00000000092f171a type:MM_FILEPAGES val:33 [ 33.378952] BUG: Bad rss-counter state mm:00000000092f171a type:MM_ANONPAGES val:22 [ 33.856626] BUG: Bad rss-counter state mm:000000009172f41d type:MM_FILEPAGES val:33 [ 33.857831] BUG: Bad rss-counter state mm:000000009172f41d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11760' (ECDSA) to the list of known hosts. 2023/06/21 04:20:17 fuzzer started 2023/06/21 04:20:18 dialing manager at localhost:36067 2023/06/21 04:20:18 checking machine... 2023/06/21 04:20:18 checking revisions... [ 34.597707] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:20:18 testing simple program... [ 34.648880] cgroup: Unknown subsys name 'net' [ 34.708186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:20:17 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=ffff888019c17449 RDI=0000000000000001 RBP=ffff888019c17460 RSP=ffff888019c17398 R8 =ffffffff86138e90 R9 =ffff888019c17448 R10=0000000000038001 R11=0000000000020d8f R12=ffff888019c17468 R13=ffff888019c17450 R14=ffff888019c17449 R15=ffff888019c17408 RIP=ffffffff81130ae3 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 00007f243c2d6700 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=00007fb7207f0040 CR3=000000000e01a000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36393236342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363932 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f99547bb044 CR3=000000001ce9e000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000