syzkaller login: [ 37.742223] BUG: Bad rss-counter state mm:0000000044b5dc70 type:MM_FILEPAGES val:33 [ 37.743463] BUG: Bad rss-counter state mm:0000000044b5dc70 type:MM_ANONPAGES val:22 [ 37.922771] ================================================================== [ 37.923854] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.924968] Read of size 8 at addr ffff88800ed0b3f8 by task sshd/220 [ 37.926058] [ 37.926316] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.927355] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.928568] Call Trace: [ 37.928964] [ 37.929353] dump_stack_lvl+0x91/0xf0 [ 37.929927] print_report+0xcc/0x620 [ 37.930501] ? __virt_addr_valid+0x102/0x340 [ 37.931148] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.931883] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.932594] kasan_report+0xbe/0xf0 [ 37.933178] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.933846] vma_interval_tree_remove+0xc75/0xec0 [ 37.934413] vma_prepare+0xc54/0x11a0 [ 37.934879] __split_vma+0x5af/0x950 [ 37.935343] ? __pfx___split_vma+0x10/0x10 [ 37.935864] ? find_held_lock+0x2c/0x110 [ 37.936372] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.936932] ? lock_is_held_type+0x9f/0x120 [ 37.937475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.938065] ? mtree_range_walk+0x632/0x900 [ 37.938609] ? mas_walk+0x5c7/0x7c0 [ 37.939070] do_vmi_munmap+0x1f1/0x2b0 [ 37.939563] mmap_region+0x1f9/0x2660 [ 37.940042] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.940548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.941276] ? __pfx_lock_acquire+0x10/0x10 [ 37.941808] ? __pfx_mmap_region+0x10/0x10 [ 37.942338] ? security_mmap_addr+0x7d/0xa0 [ 37.942857] ? get_unmapped_area+0x1f5/0x3f0 [ 37.943406] do_mmap+0x854/0xf00 [ 37.943841] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.944334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.944896] ksys_mmap_pgoff+0x3af/0x500 [ 37.945418] do_syscall_64+0x3f/0x90 [ 37.945886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.946524] RIP: 0033:0x7f7c66ce7d82 [ 37.946968] 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 [ 37.949068] RSP: 002b:00007ffc153a4338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.949985] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c66ce7d82 [ 37.950809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c66121000 [ 37.951656] RBP: 00007f7c66121000 R08: 0000000000000009 R09: 0000000000001000 [ 37.952503] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560183acef70 [ 37.953364] R13: 00007ffc153a4350 R14: 00007ffc153a4380 R15: 00007ffc153a46e0 [ 37.954211] [ 37.954493] [ 37.954709] Allocated by task 213: [ 37.955122] kasan_save_stack+0x22/0x50 [ 37.955625] kasan_set_track+0x25/0x30 [ 37.956110] __kasan_slab_alloc+0x59/0x70 [ 37.956630] kmem_cache_alloc+0x16b/0x370 [ 37.957156] vm_area_dup+0x20/0x160 [ 37.957619] __split_vma+0x170/0x950 [ 37.958085] split_vma+0xc6/0x110 [ 37.958521] mprotect_fixup+0x8d2/0xb30 [ 37.959022] do_mprotect_pkey+0x87e/0xd40 [ 37.959551] __x64_sys_mprotect+0x78/0xc0 [ 37.960072] do_syscall_64+0x3f/0x90 [ 37.960537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.961192] [ 37.961405] Freed by task 13: [ 37.961782] kasan_save_stack+0x22/0x50 [ 37.962284] kasan_set_track+0x25/0x30 [ 37.962771] kasan_save_free_info+0x2b/0x50 [ 37.963301] __kasan_slab_free+0x10a/0x190 [ 37.963829] kmem_cache_free+0x10d/0x4d0 [ 37.964331] rcu_core+0x8c8/0x2860 [ 37.964766] __do_softirq+0x1b7/0x7d4 [ 37.965258] [ 37.965471] Last potentially related work creation: [ 37.966047] kasan_save_stack+0x22/0x50 [ 37.966541] __kasan_record_aux_stack+0x8e/0xa0 [ 37.967189] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.967824] remove_vma+0x139/0x170 [ 37.968273] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.968823] do_vmi_munmap+0x1f1/0x2b0 [ 37.969334] __vm_munmap+0x138/0x3a0 [ 37.969794] __x64_sys_munmap+0x59/0x80 [ 37.970282] do_syscall_64+0x3f/0x90 [ 37.970744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.971380] [ 37.971588] The buggy address belongs to the object at ffff88800ed0b3a0 [ 37.971588] which belongs to the cache vm_area_struct of size 168 [ 37.973056] The buggy address is located 88 bytes inside of [ 37.973056] freed 168-byte region [ffff88800ed0b3a0, ffff88800ed0b448) [ 37.974475] [ 37.974695] The buggy address belongs to the physical page: [ 37.975340] page:000000003f7eb95c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed0b [ 37.976410] memcg:ffff88800ec5d001 [ 37.976825] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.977496] page_type: 0xffffffff() [ 37.977946] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.978856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec5d001 [ 37.979752] page dumped because: kasan: bad access detected [ 37.980409] [ 37.980621] Memory state around the buggy address: [ 37.981211] ffff88800ed0b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 37.982062] ffff88800ed0b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 37.982917] >ffff88800ed0b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 37.983767] ^ [ 37.984600] ffff88800ed0b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 37.985460] ffff88800ed0b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.986308] ================================================================== [ 37.987488] Disabling lock debugging due to kernel taint [ 40.001865] BUG: Bad rss-counter state mm:000000001de281de type:MM_FILEPAGES val:33 [ 40.002923] BUG: Bad rss-counter state mm:000000001de281de type:MM_ANONPAGES val:22 [ 40.484899] BUG: Bad rss-counter state mm:000000004dd72d72 type:MM_FILEPAGES val:33 [ 40.486005] BUG: Bad rss-counter state mm:000000004dd72d72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6021' (ECDSA) to the list of known hosts. 2023/06/19 17:59:45 fuzzer started 2023/06/19 17:59:45 dialing manager at localhost:44161 2023/06/19 17:59:45 checking machine... 2023/06/19 17:59:45 checking revisions... [ 41.284671] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:59:45 testing simple program... [ 41.339245] cgroup: Unknown subsys name 'net' [ 41.387460] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:59:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85dfca20 RCX=ffffffff8180c584 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfca20 RSP=ffff888019777640 R8 =ffffffff86137508 R9 =ffff888019777738 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca20 R13=ffffffff85dfc9fc R14=ffffffff85dfca1c R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---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 00007fcb55e43900 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=00007ffcc4cc8000 CR3=0000000019850000 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=0000000000000000 RBX=0000564a143b79b0 RCX=00007fcb563030f7 RDX=0000000000000001 RSI=00007fcb56971f8f RDI=00000000000001d8 RBP=00007fcb55e1eb31 RSP=00007ffcc4cce0b8 R8 =0000000000000000 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000206 R12=00007fcb56971f8f R13=0000000000000000 R14=0000000000000001 R15=0000000000000000 RIP=00007fcb562c10f0 RFL=00000246 [---Z-P-] 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 00007fcb55e43900 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=00007fdfc690c3e0 CR3=0000000019850000 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=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