syzkaller login: [ 30.702112] BUG: Bad rss-counter state mm:00000000fa7ad3d1 type:MM_FILEPAGES val:33 [ 30.703600] BUG: Bad rss-counter state mm:00000000fa7ad3d1 type:MM_ANONPAGES val:22 [ 30.846704] ================================================================== [ 30.847631] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.848581] Read of size 8 at addr ffff88800f0d6968 by task sshd/220 [ 30.849352] [ 30.849665] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.850532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.851554] Call Trace: [ 30.851890] [ 30.852178] dump_stack_lvl+0x91/0xf0 [ 30.852672] print_report+0xcc/0x620 [ 30.853159] ? __virt_addr_valid+0x102/0x340 [ 30.853709] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854324] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854934] kasan_report+0xbe/0xf0 [ 30.855437] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.856069] vma_interval_tree_remove+0xc75/0xec0 [ 30.856705] vma_prepare+0xc54/0x11a0 [ 30.857205] __split_vma+0x5af/0x950 [ 30.857693] ? __pfx___split_vma+0x10/0x10 [ 30.858264] ? find_held_lock+0x2c/0x110 [ 30.858809] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.859413] ? lock_is_held_type+0x9f/0x120 [ 30.859986] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.860636] ? mtree_range_walk+0x632/0x900 [ 30.861219] ? mas_walk+0x5c7/0x7c0 [ 30.861714] do_vmi_munmap+0x1f1/0x2b0 [ 30.862234] mmap_region+0x1f9/0x2660 [ 30.862740] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.863283] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.864056] ? __pfx_lock_acquire+0x10/0x10 [ 30.864610] ? __pfx_mmap_region+0x10/0x10 [ 30.865174] ? security_mmap_addr+0x7d/0xa0 [ 30.865724] ? get_unmapped_area+0x1f5/0x3f0 [ 30.866310] do_mmap+0x854/0xf00 [ 30.866768] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.867291] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.867899] ksys_mmap_pgoff+0x3af/0x500 [ 30.868433] do_syscall_64+0x3f/0x90 [ 30.868940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869623] RIP: 0033:0x7f284c5d6d82 [ 30.870091] 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 [ 30.872287] RSP: 002b:00007ffca5f145b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.873224] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f284c5d6d82 [ 30.874109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f284ba10000 [ 30.874997] RBP: 00007f284ba10000 R08: 0000000000000009 R09: 0000000000001000 [ 30.875905] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572eceacec0 [ 30.876797] R13: 00007ffca5f145d0 R14: 00007ffca5f14600 R15: 00007ffca5f14960 [ 30.877693] [ 30.877996] [ 30.878222] Allocated by task 213: [ 30.878678] kasan_save_stack+0x22/0x50 [ 30.879204] kasan_set_track+0x25/0x30 [ 30.879722] __kasan_slab_alloc+0x59/0x70 [ 30.880268] kmem_cache_alloc+0x16b/0x370 [ 30.880824] vm_area_dup+0x20/0x160 [ 30.881304] __split_vma+0x170/0x950 [ 30.881790] split_vma+0xc6/0x110 [ 30.882261] mprotect_fixup+0x8d2/0xb30 [ 30.882787] do_mprotect_pkey+0x87e/0xd40 [ 30.883353] __x64_sys_mprotect+0x78/0xc0 [ 30.883906] do_syscall_64+0x3f/0x90 [ 30.884406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.885086] [ 30.885316] Freed by task 13: [ 30.885722] kasan_save_stack+0x22/0x50 [ 30.886255] kasan_set_track+0x25/0x30 [ 30.886777] kasan_save_free_info+0x2b/0x50 [ 30.887339] __kasan_slab_free+0x10a/0x190 [ 30.887903] kmem_cache_free+0x10d/0x4d0 [ 30.888438] rcu_core+0x8c8/0x2860 [ 30.888911] __do_softirq+0x1b7/0x7d4 [ 30.889419] [ 30.889644] Last potentially related work creation: [ 30.890264] kasan_save_stack+0x22/0x50 [ 30.890798] __kasan_record_aux_stack+0x8e/0xa0 [ 30.891426] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.892111] remove_vma+0x139/0x170 [ 30.892587] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.893172] do_vmi_munmap+0x1f1/0x2b0 [ 30.893684] __vm_munmap+0x138/0x3a0 [ 30.894176] __x64_sys_munmap+0x59/0x80 [ 30.894712] do_syscall_64+0x3f/0x90 [ 30.895216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895898] [ 30.896124] Second to last potentially related work creation: [ 30.896843] kasan_save_stack+0x22/0x50 [ 30.897378] __kasan_record_aux_stack+0x8e/0xa0 [ 30.897977] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.898641] remove_vma+0x139/0x170 [ 30.899107] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.899703] do_vmi_munmap+0x1f1/0x2b0 [ 30.900208] mmap_region+0x1f9/0x2660 [ 30.900702] do_mmap+0x854/0xf00 [ 30.901148] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.901656] ksys_mmap_pgoff+0x3af/0x500 [ 30.902189] do_syscall_64+0x3f/0x90 [ 30.902683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.903377] [ 30.903600] The buggy address belongs to the object at ffff88800f0d6910 [ 30.903600] which belongs to the cache vm_area_struct of size 168 [ 30.905147] The buggy address is located 88 bytes inside of [ 30.905147] freed 168-byte region [ffff88800f0d6910, ffff88800f0d69b8) [ 30.906583] [ 30.906799] The buggy address belongs to the physical page: [ 30.907467] page:000000006b468021 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0d6 [ 30.908554] memcg:ffff8880096b8101 [ 30.909017] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.909747] page_type: 0xffffffff() [ 30.910202] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.911130] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096b8101 [ 30.912068] page dumped because: kasan: bad access detected [ 30.912753] [ 30.912978] Memory state around the buggy address: [ 30.913590] ffff88800f0d6800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.914496] ffff88800f0d6880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.915413] >ffff88800f0d6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.916333] ^ [ 30.917184] ffff88800f0d6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.918083] ffff88800f0d6a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.918989] ================================================================== [ 30.920247] Disabling lock debugging due to kernel taint [ 32.814357] BUG: Bad rss-counter state mm:00000000d2724ed7 type:MM_FILEPAGES val:33 [ 32.815469] BUG: Bad rss-counter state mm:00000000d2724ed7 type:MM_ANONPAGES val:22 [ 33.269889] BUG: Bad rss-counter state mm:0000000057f7dff6 type:MM_FILEPAGES val:33 [ 33.270675] BUG: Bad rss-counter state mm:0000000057f7dff6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51034' (ECDSA) to the list of known hosts. 2023/06/21 02:56:20 fuzzer started 2023/06/21 02:56:21 dialing manager at localhost:36067 2023/06/21 02:56:21 checking machine... 2023/06/21 02:56:21 checking revisions... [ 33.975664] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:56:21 testing simple program... [ 34.029702] cgroup: Unknown subsys name 'net' [ 34.087744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:56:20 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002060eff RSP=ffff8880103077e8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=736573203a296e6f R12=ffffffff856cd6a0 R13=ffffffff81787d2a R14=0000000000000000 R15=ffffffff81c619e4 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 00007fc5d5eeb700 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=00007f2d56c7eb80 CR3=000000000c728000 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=2030323a36353a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a36353a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f5932e0f5c0 RBX=00007ffe8ca59fb0 RCX=00007ffe8ca59f18 RDX=0000000000000019 RSI=000000000000002c RDI=00007f5933614060 RBP=00007ffe8ca5a0e0 RSP=00007ffe8ca59e50 R8 =00005606c29818c0 R9 =00007ffe8ca59fe0 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=00007f59335fd9ed RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5932a72900 00000000 00000000 GS =0000 0000000000000000 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=00007f5932e0f31c CR3=0000000016ec8000 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=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