syzkaller login: [ 33.719303] BUG: Bad rss-counter state mm:00000000c778504f type:MM_FILEPAGES val:33 [ 33.720288] BUG: Bad rss-counter state mm:00000000c778504f type:MM_ANONPAGES val:22 [ 33.879516] ================================================================== [ 33.880434] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.881400] Read of size 8 at addr ffff88800e6ad5c8 by task sshd/221 [ 33.882184] [ 33.882400] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.883406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.884389] Call Trace: [ 33.884710] [ 33.884997] dump_stack_lvl+0x91/0xf0 [ 33.885517] print_report+0xcc/0x620 [ 33.886023] ? __virt_addr_valid+0x102/0x340 [ 33.886579] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.887199] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.887830] kasan_report+0xbe/0xf0 [ 33.888312] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.888941] vma_interval_tree_remove+0xc75/0xec0 [ 33.889546] vma_prepare+0xc54/0x11a0 [ 33.890039] __split_vma+0x5af/0x950 [ 33.890520] ? __pfx___split_vma+0x10/0x10 [ 33.891054] ? find_held_lock+0x2c/0x110 [ 33.891577] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.892150] ? lock_is_held_type+0x9f/0x120 [ 33.892698] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.893310] ? mtree_range_walk+0x632/0x900 [ 33.893872] ? mas_walk+0x5c7/0x7c0 [ 33.894356] do_vmi_munmap+0x1f1/0x2b0 [ 33.894855] mmap_region+0x1f9/0x2660 [ 33.895347] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.895874] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.896595] ? __pfx_lock_acquire+0x10/0x10 [ 33.897133] ? __pfx_mmap_region+0x10/0x10 [ 33.897666] ? security_mmap_addr+0x7d/0xa0 [ 33.898214] ? get_unmapped_area+0x1f5/0x3f0 [ 33.898766] do_mmap+0x854/0xf00 [ 33.899209] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.899717] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.900284] ksys_mmap_pgoff+0x3af/0x500 [ 33.900793] do_syscall_64+0x3f/0x90 [ 33.901275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.901923] RIP: 0033:0x7f0129a97d82 [ 33.902388] 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 [ 33.904514] RSP: 002b:00007fffd2afddb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.905435] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0129a97d82 [ 33.906314] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0128ed1000 [ 33.907177] RBP: 00007f0128ed1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.908029] R10: 0000000000000812 R11: 0000000000000206 R12: 000055628dce0b20 [ 33.908890] R13: 00007fffd2afddd0 R14: 00007fffd2afde00 R15: 00007fffd2afe160 [ 33.909746] [ 33.910041] [ 33.910261] Allocated by task 214: [ 33.910692] kasan_save_stack+0x22/0x50 [ 33.911199] kasan_set_track+0x25/0x30 [ 33.911698] __kasan_slab_alloc+0x59/0x70 [ 33.912225] kmem_cache_alloc+0x16b/0x370 [ 33.912747] vm_area_dup+0x20/0x160 [ 33.913209] __split_vma+0x170/0x950 [ 33.913691] split_vma+0xc6/0x110 [ 33.914234] mprotect_fixup+0x8d2/0xb30 [ 33.914869] do_mprotect_pkey+0x87e/0xd40 [ 33.915522] __x64_sys_mprotect+0x78/0xc0 [ 33.916190] do_syscall_64+0x3f/0x90 [ 33.916772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.917592] [ 33.917857] Freed by task 19: [ 33.918369] kasan_save_stack+0x22/0x50 [ 33.919020] kasan_set_track+0x25/0x30 [ 33.919632] kasan_save_free_info+0x2b/0x50 [ 33.920302] __kasan_slab_free+0x10a/0x190 [ 33.920977] kmem_cache_free+0x10d/0x4d0 [ 33.921606] rcu_core+0x8c8/0x2860 [ 33.922221] __do_softirq+0x1b7/0x7d4 [ 33.922776] [ 33.923005] Last potentially related work creation: [ 33.923593] kasan_save_stack+0x22/0x50 [ 33.924182] __kasan_record_aux_stack+0x8e/0xa0 [ 33.924759] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.925418] remove_vma+0x139/0x170 [ 33.925872] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.926455] do_vmi_munmap+0x1f1/0x2b0 [ 33.926960] __vm_munmap+0x138/0x3a0 [ 33.927450] __x64_sys_munmap+0x59/0x80 [ 33.927968] do_syscall_64+0x3f/0x90 [ 33.928447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.929107] [ 33.929321] Second to last potentially related work creation: [ 33.930056] kasan_save_stack+0x22/0x50 [ 33.930569] __kasan_record_aux_stack+0x8e/0xa0 [ 33.931172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.931825] remove_vma+0x139/0x170 [ 33.932295] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.932858] do_vmi_munmap+0x1f1/0x2b0 [ 33.933360] mmap_region+0x1f9/0x2660 [ 33.933853] do_mmap+0x854/0xf00 [ 33.934319] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.934824] ksys_mmap_pgoff+0x3af/0x500 [ 33.935346] do_syscall_64+0x3f/0x90 [ 33.935826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.936499] [ 33.936726] The buggy address belongs to the object at ffff88800e6ad570 [ 33.936726] which belongs to the cache vm_area_struct of size 168 [ 33.938244] The buggy address is located 88 bytes inside of [ 33.938244] freed 168-byte region [ffff88800e6ad570, ffff88800e6ad618) [ 33.939690] [ 33.939912] The buggy address belongs to the physical page: [ 33.940588] page:00000000e859cf2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6ad [ 33.941717] memcg:ffff88800cbd0401 [ 33.942180] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.942883] page_type: 0xffffffff() [ 33.943472] raw: 0100000000000200 ffff88800879fc80 ffffea0000326380 dead00000000000c [ 33.944682] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbd0401 [ 33.945898] page dumped because: kasan: bad access detected [ 33.946609] [ 33.946879] Memory state around the buggy address: [ 33.947669] ffff88800e6ad480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.948627] ffff88800e6ad500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.949507] >ffff88800e6ad580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.950413] ^ [ 33.951110] ffff88800e6ad600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.951984] ffff88800e6ad680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.952853] ================================================================== [ 33.954037] Disabling lock debugging due to kernel taint [ 35.927303] BUG: Bad rss-counter state mm:0000000097c6f6db type:MM_FILEPAGES val:33 [ 35.928165] BUG: Bad rss-counter state mm:0000000097c6f6db type:MM_ANONPAGES val:22 [ 36.429147] BUG: Bad rss-counter state mm:00000000ba9fa715 type:MM_FILEPAGES val:33 [ 36.430290] BUG: Bad rss-counter state mm:00000000ba9fa715 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31853' (ECDSA) to the list of known hosts. 2023/06/20 07:45:42 fuzzer started 2023/06/20 07:45:42 dialing manager at localhost:44161 2023/06/20 07:45:42 checking machine... 2023/06/20 07:45:42 checking revisions... [ 37.127127] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:45:43 testing simple program... [ 37.172404] cgroup: Unknown subsys name 'net' [ 37.210443] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:45:40 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff110011aff83 RSP=ffff888008d7fc10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000283 R13=ffffea00003a1180 R14=ffffffff8186b9c5 R15=ffff8880094ef800 RIP=ffffffff812e004a 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 0000000000000000 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=00007ffe113ab000 CR3=000000001813a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f4a724c5e70 CR3=000000000f360000 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=29e017fcdfefe7b3db49375a609503fe XMM02=000000000011c880ec2efd57dc4c00df XMM03=0000000000123ce86db5ac38684a86f5 XMM04=72590a2187dff24000000000000ae988 XMM05=e4cb8bb95a7664b60000000000134c38 XMM06=c291bd5c70af25b90000000000134ac0 XMM07=e042d86d42eb936e0000000000123f68 XMM08=6db5ac38684a86f5000000000011c8e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000