syzkaller login: [ 37.738988] BUG: Bad rss-counter state mm:0000000063cf8592 type:MM_FILEPAGES val:33 [ 37.740177] BUG: Bad rss-counter state mm:0000000063cf8592 type:MM_ANONPAGES val:22 [ 37.908694] ================================================================== [ 37.909967] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.910935] Read of size 8 at addr ffff88800ea9c798 by task sshd/219 [ 37.911699] [ 37.911914] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.912779] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.913756] Call Trace: [ 37.914072] [ 37.914357] dump_stack_lvl+0x91/0xf0 [ 37.914842] print_report+0xcc/0x620 [ 37.915326] ? __virt_addr_valid+0x102/0x340 [ 37.915874] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.916492] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.917110] kasan_report+0xbe/0xf0 [ 37.917589] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.918211] vma_interval_tree_remove+0xc75/0xec0 [ 37.918817] vma_prepare+0xc54/0x11a0 [ 37.919306] __split_vma+0x5af/0x950 [ 37.919776] ? __pfx___split_vma+0x10/0x10 [ 37.920305] ? find_held_lock+0x2c/0x110 [ 37.920823] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.921411] ? lock_is_held_type+0x9f/0x120 [ 37.921947] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.922580] ? mtree_range_walk+0x632/0x900 [ 37.923149] ? mas_walk+0x5c7/0x7c0 [ 37.923633] do_vmi_munmap+0x1f1/0x2b0 [ 37.924136] mmap_region+0x1f9/0x2660 [ 37.924624] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.925140] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.925850] ? __pfx_lock_acquire+0x10/0x10 [ 37.926395] ? __pfx_mmap_region+0x10/0x10 [ 37.926938] ? security_mmap_addr+0x7d/0xa0 [ 37.927485] ? get_unmapped_area+0x1f5/0x3f0 [ 37.928040] do_mmap+0x854/0xf00 [ 37.928486] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.928987] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.929595] ksys_mmap_pgoff+0x3af/0x500 [ 37.930112] do_syscall_64+0x3f/0x90 [ 37.930598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.931253] RIP: 0033:0x7fc879569d82 [ 37.931716] 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 [ 37.933865] RSP: 002b:00007ffe199d8ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.934763] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc879569d82 [ 37.935606] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8789a3000 [ 37.936457] RBP: 00007fc8789a3000 R08: 0000000000000009 R09: 0000000000001000 [ 37.937325] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcfb30fec0 [ 37.938181] R13: 00007ffe199d8ae0 R14: 00007ffe199d8b10 R15: 00007ffe199d8e70 [ 37.939050] [ 37.939353] [ 37.939576] Allocated by task 212: [ 37.940013] kasan_save_stack+0x22/0x50 [ 37.940519] kasan_set_track+0x25/0x30 [ 37.941018] __kasan_slab_alloc+0x59/0x70 [ 37.941592] kmem_cache_alloc+0x16b/0x370 [ 37.942126] vm_area_dup+0x20/0x160 [ 37.942590] __split_vma+0x170/0x950 [ 37.943066] split_vma+0xc6/0x110 [ 37.943518] mprotect_fixup+0x8d2/0xb30 [ 37.944024] do_mprotect_pkey+0x87e/0xd40 [ 37.944563] __x64_sys_mprotect+0x78/0xc0 [ 37.945093] do_syscall_64+0x3f/0x90 [ 37.945591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.946289] [ 37.946521] Freed by task 212: [ 37.946928] kasan_save_stack+0x22/0x50 [ 37.947439] kasan_set_track+0x25/0x30 [ 37.947940] kasan_save_free_info+0x2b/0x50 [ 37.948483] __kasan_slab_free+0x10a/0x190 [ 37.949025] kmem_cache_free+0x10d/0x4d0 [ 37.949552] rcu_core+0x8c8/0x2860 [ 37.949995] __do_softirq+0x1b7/0x7d4 [ 37.950472] [ 37.950685] Last potentially related work creation: [ 37.951328] kasan_save_stack+0x22/0x50 [ 37.951832] __kasan_record_aux_stack+0x8e/0xa0 [ 37.952405] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.953048] remove_vma+0x139/0x170 [ 37.953512] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.954067] do_vmi_munmap+0x1f1/0x2b0 [ 37.954551] __vm_munmap+0x138/0x3a0 [ 37.955019] __x64_sys_munmap+0x59/0x80 [ 37.955516] do_syscall_64+0x3f/0x90 [ 37.955993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.956629] [ 37.956842] The buggy address belongs to the object at ffff88800ea9c740 [ 37.956842] which belongs to the cache vm_area_struct of size 168 [ 37.958319] The buggy address is located 88 bytes inside of [ 37.958319] freed 168-byte region [ffff88800ea9c740, ffff88800ea9c7e8) [ 37.959768] [ 37.959989] The buggy address belongs to the physical page: [ 37.960651] page:00000000e6cd2e95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea9c [ 37.961748] memcg:ffff88800e58b001 [ 37.962187] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.962878] page_type: 0xffffffff() [ 37.963327] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 37.964243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e58b001 [ 37.965147] page dumped because: kasan: bad access detected [ 37.965811] [ 37.966026] Memory state around the buggy address: [ 37.966610] ffff88800ea9c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.967460] ffff88800ea9c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.968311] >ffff88800ea9c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.969179] ^ [ 37.969691] ffff88800ea9c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.970586] ffff88800ea9c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.971474] ================================================================== [ 37.972493] Disabling lock debugging due to kernel taint [ 40.353525] BUG: Bad rss-counter state mm:000000008d63e314 type:MM_FILEPAGES val:33 [ 40.354508] BUG: Bad rss-counter state mm:000000008d63e314 type:MM_ANONPAGES val:22 [ 40.812653] BUG: Bad rss-counter state mm:00000000d843fad8 type:MM_FILEPAGES val:33 [ 40.813684] BUG: Bad rss-counter state mm:00000000d843fad8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20828' (ECDSA) to the list of known hosts. 2023/06/20 00:40:39 fuzzer started 2023/06/20 00:40:39 dialing manager at localhost:44161 2023/06/20 00:40:39 checking machine... 2023/06/20 00:40:39 checking revisions... [ 41.584826] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:40:39 testing simple program... [ 41.641638] cgroup: Unknown subsys name 'net' [ 41.697472] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:40:36 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffff888016a251f0 RCX=0000000000000000 RDX=0000000000000002 RSI=ffff8880142bf668 RDI=ffff8880142bf678 RBP=ffff8880142bf678 RSP=ffff8880142bf5d0 R8 =0000000000000005 R9 =0000000000000004 R10=0000000000000004 R11=0000000000000000 R12=ffff8880142bf668 R13=0000000000000002 R14=ffff88800ff4c738 R15=ffff8880142bf678 RIP=ffffffff814c07eb 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7aa4b6d900 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=00007f7aa3f65370 CR3=000000000c504000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=edbae9d4247c1f0400000000000ae988 XMM05=abcbaeca748599440000000000134fa0 XMM06=dfcdbad4f1609c370000000000133d78 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff8604d2dc RCX=ffffffff84506c7e RDX=0000000000000000 RSI=ffffffff864b0222 RDI=ffffffff8604d2b8 RBP=ffffffff8604d2d4 RSP=ffff88800dabeee0 R8 =ffffffff864b0222 R9 =ffff88800dabefd8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffffffff8604d2e8 R13=ffffffff8604d2b8 R14=ffffffff8604d2d0 R15=dffffc0000000000 RIP=ffffffff8112fc8e RFL=00000246 [---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 00007fa593911900 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=000056406a8a7b88 CR3=000000000c53e000 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=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