syzkaller login: [ 38.706670] BUG: Bad rss-counter state mm:000000002e6504e2 type:MM_FILEPAGES val:33 [ 38.708101] BUG: Bad rss-counter state mm:000000002e6504e2 type:MM_ANONPAGES val:22 [ 38.864121] ================================================================== [ 38.865071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.866067] Read of size 8 at addr ffff88800b3bb058 by task sshd/219 [ 38.866835] [ 38.867141] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.868073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.869048] Call Trace: [ 38.869486] [ 38.869858] dump_stack_lvl+0x91/0xf0 [ 38.870461] print_report+0xcc/0x620 [ 38.871047] ? __virt_addr_valid+0x102/0x340 [ 38.871709] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.872451] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.873204] kasan_report+0xbe/0xf0 [ 38.873799] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.874562] vma_interval_tree_remove+0xc75/0xec0 [ 38.875287] vma_prepare+0xc54/0x11a0 [ 38.875848] __split_vma+0x5af/0x950 [ 38.876413] ? __pfx___split_vma+0x10/0x10 [ 38.877045] ? find_held_lock+0x2c/0x110 [ 38.877714] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.878275] ? lock_is_held_type+0x9f/0x120 [ 38.878830] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.879465] ? mtree_range_walk+0x632/0x900 [ 38.880037] ? mas_walk+0x5c7/0x7c0 [ 38.880516] do_vmi_munmap+0x1f1/0x2b0 [ 38.881013] mmap_region+0x1f9/0x2660 [ 38.881516] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.882042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.882784] ? __pfx_lock_acquire+0x10/0x10 [ 38.883328] ? __pfx_mmap_region+0x10/0x10 [ 38.883866] ? security_mmap_addr+0x7d/0xa0 [ 38.884403] ? get_unmapped_area+0x1f5/0x3f0 [ 38.884963] do_mmap+0x854/0xf00 [ 38.885417] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.885922] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.886495] ksys_mmap_pgoff+0x3af/0x500 [ 38.887029] do_syscall_64+0x3f/0x90 [ 38.887528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.888198] RIP: 0033:0x7f0233b6cd82 [ 38.888668] 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 [ 38.890881] RSP: 002b:00007ffe30c697d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.891814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0233b6cd82 [ 38.892688] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0232fa6000 [ 38.893573] RBP: 00007f0232fa6000 R08: 0000000000000009 R09: 0000000000001000 [ 38.894459] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3c2c72ec0 [ 38.895336] R13: 00007ffe30c697f0 R14: 00007ffe30c69820 R15: 00007ffe30c69b80 [ 38.896237] [ 38.896537] [ 38.896760] Allocated by task 212: [ 38.897190] kasan_save_stack+0x22/0x50 [ 38.897716] kasan_set_track+0x25/0x30 [ 38.898216] __kasan_slab_alloc+0x59/0x70 [ 38.898747] kmem_cache_alloc+0x16b/0x370 [ 38.899258] vm_area_dup+0x20/0x160 [ 38.899719] __split_vma+0x170/0x950 [ 38.900194] split_vma+0xc6/0x110 [ 38.900633] mprotect_fixup+0x8d2/0xb30 [ 38.901146] do_mprotect_pkey+0x87e/0xd40 [ 38.901710] __x64_sys_mprotect+0x78/0xc0 [ 38.902255] do_syscall_64+0x3f/0x90 [ 38.902740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903402] [ 38.903628] Freed by task 212: [ 38.904029] kasan_save_stack+0x22/0x50 [ 38.904546] kasan_set_track+0x25/0x30 [ 38.905053] kasan_save_free_info+0x2b/0x50 [ 38.905600] __kasan_slab_free+0x10a/0x190 [ 38.906151] kmem_cache_free+0x10d/0x4d0 [ 38.906685] rcu_core+0x8c8/0x2860 [ 38.907148] __do_softirq+0x1b7/0x7d4 [ 38.907641] [ 38.907865] Last potentially related work creation: [ 38.908474] kasan_save_stack+0x22/0x50 [ 38.909005] __kasan_record_aux_stack+0x8e/0xa0 [ 38.909615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.910308] remove_vma+0x139/0x170 [ 38.910773] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.911348] do_vmi_munmap+0x1f1/0x2b0 [ 38.911842] __vm_munmap+0x138/0x3a0 [ 38.912326] __x64_sys_munmap+0x59/0x80 [ 38.912841] do_syscall_64+0x3f/0x90 [ 38.913331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914010] [ 38.914235] The buggy address belongs to the object at ffff88800b3bb000 [ 38.914235] which belongs to the cache vm_area_struct of size 168 [ 38.915768] The buggy address is located 88 bytes inside of [ 38.915768] freed 168-byte region [ffff88800b3bb000, ffff88800b3bb0a8) [ 38.917232] [ 38.917469] The buggy address belongs to the physical page: [ 38.918160] page:00000000baf84bdb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb3bb [ 38.919283] memcg:ffff88801985c301 [ 38.919729] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.920386] page_type: 0xffffffff() [ 38.920865] raw: 0100000000000200 ffff8880087a0c80 ffffea000035f2c0 dead000000000006 [ 38.921820] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801985c301 [ 38.922761] page dumped because: kasan: bad access detected [ 38.923457] [ 38.923689] Memory state around the buggy address: [ 38.924296] ffff88800b3baf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.925164] ffff88800b3baf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.926032] >ffff88800b3bb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.926908] ^ [ 38.927651] ffff88800b3bb080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.928511] ffff88800b3bb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.929427] ================================================================== [ 38.930510] Disabling lock debugging due to kernel taint [ 41.064418] BUG: Bad rss-counter state mm:00000000a0a20bf7 type:MM_FILEPAGES val:33 [ 41.065410] BUG: Bad rss-counter state mm:00000000a0a20bf7 type:MM_ANONPAGES val:22 [ 41.617139] BUG: Bad rss-counter state mm:0000000039852db8 type:MM_FILEPAGES val:33 [ 41.618144] BUG: Bad rss-counter state mm:0000000039852db8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10084' (ECDSA) to the list of known hosts. 2023/06/20 23:36:58 fuzzer started 2023/06/20 23:36:58 dialing manager at localhost:36067 2023/06/20 23:36:58 checking machine... 2023/06/20 23:36:58 checking revisions... [ 42.280535] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:36:58 testing simple program... [ 42.329920] cgroup: Unknown subsys name 'net' [ 42.372484] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:36:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ff3a2387650 CR3=0000000019e6a000 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=36333a3332203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732038353a3633 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383632 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=1ffffffff0bb2584 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff8880146272a8 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----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 00007f79bf6aa900 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=00007f79beaaf810 CR3=0000000013a38000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ccd3872599f0877d00000000000ae988 XMM05=44cf37aa9137d95000000000001329c8 XMM06=dfcdbad4f1609c3700000000001314f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000