syzkaller login: [ 23.748122] BUG: Bad rss-counter state mm:00000000a8005d1b type:MM_FILEPAGES val:33 [ 23.749553] BUG: Bad rss-counter state mm:00000000a8005d1b type:MM_ANONPAGES val:22 [ 23.921714] ================================================================== [ 23.922736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.923867] Read of size 8 at addr ffff88800e5f94e0 by task sshd/221 [ 23.924809] [ 23.925068] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.926270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.927485] Call Trace: [ 23.927898] [ 23.928274] dump_stack_lvl+0x91/0xf0 [ 23.928860] print_report+0xcc/0x620 [ 23.929452] ? __virt_addr_valid+0x102/0x340 [ 23.930128] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.930892] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.931650] kasan_report+0xbe/0xf0 [ 23.932237] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.933001] vma_interval_tree_remove+0xc75/0xec0 [ 23.933744] vma_prepare+0xc54/0x11a0 [ 23.934334] __split_vma+0x5af/0x950 [ 23.934919] ? __pfx___split_vma+0x10/0x10 [ 23.935574] ? find_held_lock+0x2c/0x110 [ 23.936200] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.936884] ? lock_is_held_type+0x9f/0x120 [ 23.937530] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.938264] ? mtree_range_walk+0x632/0x900 [ 23.938943] ? mas_walk+0x5c7/0x7c0 [ 23.939487] do_vmi_munmap+0x1f1/0x2b0 [ 23.939951] mmap_region+0x1f9/0x2660 [ 23.940426] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.940910] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.941584] ? __pfx_lock_acquire+0x10/0x10 [ 23.942087] ? __pfx_mmap_region+0x10/0x10 [ 23.942590] ? security_mmap_addr+0x7d/0xa0 [ 23.943087] ? get_unmapped_area+0x1f5/0x3f0 [ 23.943608] do_mmap+0x854/0xf00 [ 23.944024] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.944497] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.945034] ksys_mmap_pgoff+0x3af/0x500 [ 23.945516] do_syscall_64+0x3f/0x90 [ 23.945976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.946588] RIP: 0033:0x7fc3914efd82 [ 23.947017] 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 [ 23.949032] RSP: 002b:00007ffd2a3a36c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.949913] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3914efd82 [ 23.950744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc390929000 [ 23.951573] RBP: 00007fc390929000 R08: 0000000000000009 R09: 0000000000001000 [ 23.952404] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559445254ec0 [ 23.953240] R13: 00007ffd2a3a36e0 R14: 00007ffd2a3a3710 R15: 00007ffd2a3a3a70 [ 23.954082] [ 23.954363] [ 23.954578] Allocated by task 214: [ 23.954996] kasan_save_stack+0x22/0x50 [ 23.955485] kasan_set_track+0x25/0x30 [ 23.955970] __kasan_slab_alloc+0x59/0x70 [ 23.956483] kmem_cache_alloc+0x16b/0x370 [ 23.956990] vm_area_dup+0x20/0x160 [ 23.957422] __split_vma+0x170/0x950 [ 23.957861] split_vma+0xc6/0x110 [ 23.958274] mprotect_fixup+0x8d2/0xb30 [ 23.958751] do_mprotect_pkey+0x87e/0xd40 [ 23.959239] __x64_sys_mprotect+0x78/0xc0 [ 23.959729] do_syscall_64+0x3f/0x90 [ 23.960179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.960803] [ 23.961009] Freed by task 212: [ 23.961381] kasan_save_stack+0x22/0x50 [ 23.961856] kasan_set_track+0x25/0x30 [ 23.962323] kasan_save_free_info+0x2b/0x50 [ 23.962823] __kasan_slab_free+0x10a/0x190 [ 23.963325] kmem_cache_free+0x10d/0x4d0 [ 23.963805] rcu_core+0x8c8/0x2860 [ 23.964229] __do_softirq+0x1b7/0x7d4 [ 23.964682] [ 23.964887] Last potentially related work creation: [ 23.965438] kasan_save_stack+0x22/0x50 [ 23.965910] __kasan_record_aux_stack+0x8e/0xa0 [ 23.966456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.967103] remove_vma+0x139/0x170 [ 23.967535] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.968063] do_vmi_munmap+0x1f1/0x2b0 [ 23.968543] __vm_munmap+0x138/0x3a0 [ 23.968988] __x64_sys_munmap+0x59/0x80 [ 23.969466] do_syscall_64+0x3f/0x90 [ 23.969929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.970564] [ 23.970774] The buggy address belongs to the object at ffff88800e5f9488 [ 23.970774] which belongs to the cache vm_area_struct of size 168 [ 23.972223] The buggy address is located 88 bytes inside of [ 23.972223] freed 168-byte region [ffff88800e5f9488, ffff88800e5f9530) [ 23.973607] [ 23.973817] The buggy address belongs to the physical page: [ 23.974463] page:0000000088ed0c27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5f9 [ 23.975531] memcg:ffff88800e60c201 [ 23.975954] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.976586] page_type: 0xffffffff() [ 23.977028] raw: 0100000000000200 ffff8880087a0c80 ffffea000039d6c0 dead000000000004 [ 23.977916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e60c201 [ 23.978796] page dumped because: kasan: bad access detected [ 23.979445] [ 23.979654] Memory state around the buggy address: [ 23.980241] ffff88800e5f9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.981097] ffff88800e5f9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 23.981938] >ffff88800e5f9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.982764] ^ [ 23.983501] ffff88800e5f9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 23.984355] ffff88800e5f9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.985174] ================================================================== [ 23.986112] Disabling lock debugging due to kernel taint [ 25.891829] BUG: Bad rss-counter state mm:00000000a63d6d08 type:MM_FILEPAGES val:33 [ 25.892705] BUG: Bad rss-counter state mm:00000000a63d6d08 type:MM_ANONPAGES val:22 [ 26.395345] BUG: Bad rss-counter state mm:00000000492123e8 type:MM_FILEPAGES val:33 [ 26.396304] BUG: Bad rss-counter state mm:00000000492123e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18136' (ECDSA) to the list of known hosts. 2023/06/21 04:52:53 fuzzer started 2023/06/21 04:52:53 dialing manager at localhost:36067 2023/06/21 04:52:53 checking machine... 2023/06/21 04:52:53 checking revisions... [ 27.105526] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:52:53 testing simple program... [ 27.149058] cgroup: Unknown subsys name 'net' [ 27.188221] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:52:53 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880146676f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88800e95dd10 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce3de20 R15=0000000000000000 RIP=ffffffff8180f189 RFL=00000046 [---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 00007f7678040900 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=00007ffe0b11e000 CR3=0000000019e44000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f5089a054d0 CR3=0000000014548000 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=21331d4b9c1f93995149b02e70a2e2b6 XMM02=000000000011dab0eff9b2d0a8fce9cb XMM03=000000000011db802c67c8bc2e329bc3 XMM04=d27bd1e098991f6300000000000ae988 XMM05=e4cb8bb95a7664b60000000000131570 XMM06=06e34e26028524300000000000130748 XMM07=e042d86d42eb936e0000000000121a68 XMM08=eb87505d770d5a8a000000000011db80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000