syzkaller login: [ 30.747415] BUG: Bad rss-counter state mm:0000000003a4ef4b type:MM_FILEPAGES val:33 [ 30.749274] BUG: Bad rss-counter state mm:0000000003a4ef4b type:MM_ANONPAGES val:22 [ 30.902882] ================================================================== [ 30.903970] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.905286] Read of size 8 at addr ffff88800cbe16b0 by task sshd/221 [ 30.906181] [ 30.906429] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.907458] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.908581] Call Trace: [ 30.908974] [ 30.909293] dump_stack_lvl+0x91/0xf0 [ 30.909856] print_report+0xcc/0x620 [ 30.910417] ? __virt_addr_valid+0x102/0x340 [ 30.911072] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.911822] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.912561] kasan_report+0xbe/0xf0 [ 30.913159] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.913915] vma_interval_tree_remove+0xc75/0xec0 [ 30.914639] vma_prepare+0xc54/0x11a0 [ 30.915224] __split_vma+0x5af/0x950 [ 30.915804] ? __pfx___split_vma+0x10/0x10 [ 30.916446] ? find_held_lock+0x2c/0x110 [ 30.917099] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.917792] ? lock_is_held_type+0x9f/0x120 [ 30.918433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.919156] ? mtree_range_walk+0x632/0x900 [ 30.919859] ? mas_walk+0x5c7/0x7c0 [ 30.920422] do_vmi_munmap+0x1f1/0x2b0 [ 30.921024] mmap_region+0x1f9/0x2660 [ 30.921592] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.922244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.923103] ? __pfx_lock_acquire+0x10/0x10 [ 30.923740] ? __pfx_mmap_region+0x10/0x10 [ 30.924393] ? security_mmap_addr+0x7d/0xa0 [ 30.925060] ? get_unmapped_area+0x1f5/0x3f0 [ 30.925704] do_mmap+0x854/0xf00 [ 30.926232] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.926845] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.927513] ksys_mmap_pgoff+0x3af/0x500 [ 30.928136] do_syscall_64+0x3f/0x90 [ 30.928718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.929501] RIP: 0033:0x7fdf755a9d82 [ 30.930055] 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 [ 30.932591] RSP: 002b:00007ffc24687028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.933695] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf755a9d82 [ 30.934698] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf749e3000 [ 30.935726] RBP: 00007fdf749e3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.936763] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c46509ec0 [ 30.937766] R13: 00007ffc24687040 R14: 00007ffc24687070 R15: 00007ffc246873d0 [ 30.938790] [ 30.939146] [ 30.939397] Allocated by task 214: [ 30.939925] kasan_save_stack+0x22/0x50 [ 30.940513] kasan_set_track+0x25/0x30 [ 30.941133] __kasan_slab_alloc+0x59/0x70 [ 30.941748] kmem_cache_alloc+0x16b/0x370 [ 30.942356] vm_area_dup+0x20/0x160 [ 30.942912] __split_vma+0x170/0x950 [ 30.943475] split_vma+0xc6/0x110 [ 30.944010] mprotect_fixup+0x8d2/0xb30 [ 30.944594] do_mprotect_pkey+0x87e/0xd40 [ 30.945232] __x64_sys_mprotect+0x78/0xc0 [ 30.945857] do_syscall_64+0x3f/0x90 [ 30.946457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.947235] [ 30.947494] Freed by task 214: [ 30.947965] kasan_save_stack+0x22/0x50 [ 30.948546] kasan_set_track+0x25/0x30 [ 30.949151] kasan_save_free_info+0x2b/0x50 [ 30.949790] __kasan_slab_free+0x10a/0x190 [ 30.950421] kmem_cache_free+0x10d/0x4d0 [ 30.951047] rcu_core+0x8c8/0x2860 [ 30.951565] __do_softirq+0x1b7/0x7d4 [ 30.952137] [ 30.952384] Last potentially related work creation: [ 30.953080] kasan_save_stack+0x22/0x50 [ 30.953656] __kasan_record_aux_stack+0x8e/0xa0 [ 30.954331] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.955108] remove_vma+0x139/0x170 [ 30.955638] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.956294] do_vmi_munmap+0x1f1/0x2b0 [ 30.956889] __vm_munmap+0x138/0x3a0 [ 30.957430] __x64_sys_munmap+0x59/0x80 [ 30.958021] do_syscall_64+0x3f/0x90 [ 30.958573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.959349] [ 30.959596] The buggy address belongs to the object at ffff88800cbe1658 [ 30.959596] which belongs to the cache vm_area_struct of size 168 [ 30.961330] The buggy address is located 88 bytes inside of [ 30.961330] freed 168-byte region [ffff88800cbe1658, ffff88800cbe1700) [ 30.963004] [ 30.963263] The buggy address belongs to the physical page: [ 30.964037] page:00000000bfa65851 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbe1 [ 30.965326] memcg:ffff888014490901 [ 30.965831] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.966580] page_type: 0xffffffff() [ 30.967137] raw: 0100000000000200 ffff8880087a0c80 ffffea000025d180 dead000000000004 [ 30.968223] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014490901 [ 30.969308] page dumped because: kasan: bad access detected [ 30.970090] [ 30.970341] Memory state around the buggy address: [ 30.971029] ffff88800cbe1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.972021] ffff88800cbe1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.973029] >ffff88800cbe1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.974018] ^ [ 30.974691] ffff88800cbe1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.975703] ffff88800cbe1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.976690] ================================================================== [ 30.977813] Disabling lock debugging due to kernel taint [ 33.055841] BUG: Bad rss-counter state mm:00000000956c3f30 type:MM_FILEPAGES val:33 [ 33.057054] BUG: Bad rss-counter state mm:00000000956c3f30 type:MM_ANONPAGES val:22 [ 33.542220] BUG: Bad rss-counter state mm:000000003a171dd5 type:MM_FILEPAGES val:33 [ 33.543430] BUG: Bad rss-counter state mm:000000003a171dd5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39673' (ECDSA) to the list of known hosts. 2023/06/21 02:59:56 fuzzer started 2023/06/21 02:59:56 dialing manager at localhost:36067 2023/06/21 02:59:56 checking machine... 2023/06/21 02:59:56 checking revisions... [ 34.194180] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:59:57 testing simple program... [ 34.242633] cgroup: Unknown subsys name 'net' [ 34.282422] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:59:56 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffffea00007622c0 RCX=0000000000000000 RDX=ffff88800ee08000 RSI=ffffffff81710e78 RDI=0000000000000005 RBP=ffff88800a12fd90 RSP=ffff88800a12fbf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800f2812b8 R14=ffff88800a12fdb8 R15=ffffea00007622f4 RIP=ffffffff814c086b RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0d48df1900 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=00007fff3a31c000 CR3=000000001b882000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c616e156d2d2d7120152e322e302e00 XMM07=672065736f6c635f6e6f69737365733a 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=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=00007fa21a2797f0 CR3=000000000d62c000 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=2036353a39353a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a39353a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000