syzkaller login: [ 31.178853] BUG: Bad rss-counter state mm:00000000946e7ad6 type:MM_FILEPAGES val:33 [ 31.180474] BUG: Bad rss-counter state mm:00000000946e7ad6 type:MM_ANONPAGES val:22 [ 31.339380] ================================================================== [ 31.340519] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.341727] Read of size 8 at addr ffff88800eb7c798 by task sshd/219 [ 31.342599] [ 31.342817] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.343688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.344712] Call Trace: [ 31.345038] [ 31.345324] dump_stack_lvl+0x91/0xf0 [ 31.345815] print_report+0xcc/0x620 [ 31.346306] ? __virt_addr_valid+0x102/0x340 [ 31.346870] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347495] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348123] kasan_report+0xbe/0xf0 [ 31.348620] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349242] vma_interval_tree_remove+0xc75/0xec0 [ 31.349843] vma_prepare+0xc54/0x11a0 [ 31.350321] __split_vma+0x5af/0x950 [ 31.350799] ? __pfx___split_vma+0x10/0x10 [ 31.351335] ? find_held_lock+0x2c/0x110 [ 31.351858] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.352449] ? lock_is_held_type+0x9f/0x120 [ 31.352992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.353597] ? mtree_range_walk+0x632/0x900 [ 31.354150] ? mas_walk+0x5c7/0x7c0 [ 31.354623] do_vmi_munmap+0x1f1/0x2b0 [ 31.355117] mmap_region+0x1f9/0x2660 [ 31.355603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.356125] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.356860] ? __pfx_lock_acquire+0x10/0x10 [ 31.357389] ? __pfx_mmap_region+0x10/0x10 [ 31.357914] ? security_mmap_addr+0x7d/0xa0 [ 31.358445] ? get_unmapped_area+0x1f5/0x3f0 [ 31.358996] do_mmap+0x854/0xf00 [ 31.359436] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.359930] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.360516] ksys_mmap_pgoff+0x3af/0x500 [ 31.361021] do_syscall_64+0x3f/0x90 [ 31.361508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362167] RIP: 0033:0x7fd39092dd82 [ 31.362629] 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 [ 31.364766] RSP: 002b:00007fff8cf97818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.365686] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd39092dd82 [ 31.366544] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd38fd67000 [ 31.367412] RBP: 00007fd38fd67000 R08: 0000000000000009 R09: 0000000000001000 [ 31.368272] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e2d0d6b20 [ 31.369127] R13: 00007fff8cf97830 R14: 00007fff8cf97860 R15: 00007fff8cf97bc0 [ 31.369994] [ 31.370290] [ 31.370517] Allocated by task 212: [ 31.370947] kasan_save_stack+0x22/0x50 [ 31.371458] kasan_set_track+0x25/0x30 [ 31.371952] __kasan_slab_alloc+0x59/0x70 [ 31.372504] kmem_cache_alloc+0x16b/0x370 [ 31.373020] vm_area_dup+0x20/0x160 [ 31.373479] __split_vma+0x170/0x950 [ 31.373943] split_vma+0xc6/0x110 [ 31.374385] mprotect_fixup+0x8d2/0xb30 [ 31.374909] do_mprotect_pkey+0x87e/0xd40 [ 31.375457] __x64_sys_mprotect+0x78/0xc0 [ 31.376003] do_syscall_64+0x3f/0x90 [ 31.376514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377191] [ 31.377419] Freed by task 212: [ 31.377833] kasan_save_stack+0x22/0x50 [ 31.378356] kasan_set_track+0x25/0x30 [ 31.378877] kasan_save_free_info+0x2b/0x50 [ 31.379440] __kasan_slab_free+0x10a/0x190 [ 31.379990] kmem_cache_free+0x10d/0x4d0 [ 31.380540] rcu_core+0x8c8/0x2860 [ 31.381004] __do_softirq+0x1b7/0x7d4 [ 31.381506] [ 31.381727] Last potentially related work creation: [ 31.382349] kasan_save_stack+0x22/0x50 [ 31.382878] __kasan_record_aux_stack+0x8e/0xa0 [ 31.383471] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.384140] remove_vma+0x139/0x170 [ 31.384623] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.385202] do_vmi_munmap+0x1f1/0x2b0 [ 31.385709] __vm_munmap+0x138/0x3a0 [ 31.386196] __x64_sys_munmap+0x59/0x80 [ 31.386711] do_syscall_64+0x3f/0x90 [ 31.387207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387875] [ 31.388102] Second to last potentially related work creation: [ 31.388831] kasan_save_stack+0x22/0x50 [ 31.389363] __kasan_record_aux_stack+0x8e/0xa0 [ 31.389954] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.390624] remove_vma+0x139/0x170 [ 31.391097] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.391681] do_vmi_munmap+0x1f1/0x2b0 [ 31.392194] mmap_region+0x1f9/0x2660 [ 31.392691] do_mmap+0x854/0xf00 [ 31.393143] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.393648] ksys_mmap_pgoff+0x3af/0x500 [ 31.394169] do_syscall_64+0x3f/0x90 [ 31.394665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395327] [ 31.395552] The buggy address belongs to the object at ffff88800eb7c740 [ 31.395552] which belongs to the cache vm_area_struct of size 168 [ 31.397105] The buggy address is located 88 bytes inside of [ 31.397105] freed 168-byte region [ffff88800eb7c740, ffff88800eb7c7e8) [ 31.398580] [ 31.398806] The buggy address belongs to the physical page: [ 31.399498] page:0000000052673e8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb7c [ 31.400631] memcg:ffff88800e1cc101 [ 31.401079] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.401803] page_type: 0xffffffff() [ 31.402271] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.403229] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1cc101 [ 31.404196] page dumped because: kasan: bad access detected [ 31.404887] [ 31.405109] Memory state around the buggy address: [ 31.405713] ffff88800eb7c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.406608] ffff88800eb7c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.407506] >ffff88800eb7c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.408402] ^ [ 31.408920] ffff88800eb7c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.409809] ffff88800eb7c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.410700] ================================================================== [ 31.412109] Disabling lock debugging due to kernel taint [ 33.611395] BUG: Bad rss-counter state mm:000000004dbc4d67 type:MM_FILEPAGES val:33 [ 33.612491] BUG: Bad rss-counter state mm:000000004dbc4d67 type:MM_ANONPAGES val:22 [ 34.088272] BUG: Bad rss-counter state mm:00000000dafea021 type:MM_FILEPAGES val:33 [ 34.089388] BUG: Bad rss-counter state mm:00000000dafea021 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45979' (ECDSA) to the list of known hosts. 2023/06/21 02:38:09 fuzzer started 2023/06/21 02:38:09 dialing manager at localhost:36067 2023/06/21 02:38:09 checking machine... 2023/06/21 02:38:09 checking revisions... [ 34.825054] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:38:09 testing simple program... [ 34.864541] cgroup: Unknown subsys name 'net' [ 34.937890] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:38:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002c57f75 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff8880162bfb90 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85ba4dd8 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000056 [---ZAP-] 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 00007fdd718ed900 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=00007ffec5455000 CR3=0000000009072000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=0000000000010b8d RBX=0000000000000001 RCX=ffffffff813ad71f RDX=0000000000010b9e RSI=0000000000003ad7 RDI=ffffffff860d82bc RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =ffffffff860d8256 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000010b8d R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e379b9 R15=ffff888008e37978 RIP=ffffffff81130868 RFL=00000293 [--S-A-C] 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=00007fdc68517fa0 CR3=00000000147e2000 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=2038303a38333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a38333a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000