syzkaller login: [ 30.531835] BUG: Bad rss-counter state mm:00000000d8e1c39c type:MM_FILEPAGES val:33 [ 30.533058] BUG: Bad rss-counter state mm:00000000d8e1c39c type:MM_ANONPAGES val:22 [ 30.577101] ================================================================== [ 30.578023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.578972] Read of size 8 at addr ffff88801a29a140 by task sshd/219 [ 30.579754] [ 30.579973] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.580848] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.581841] Call Trace: [ 30.582162] [ 30.582456] dump_stack_lvl+0x91/0xf0 [ 30.582957] print_report+0xcc/0x620 [ 30.583441] ? __virt_addr_valid+0x102/0x340 [ 30.584002] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.584677] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.585378] kasan_report+0xbe/0xf0 [ 30.585858] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.586481] vma_interval_tree_remove+0xc75/0xec0 [ 30.587104] vma_prepare+0xc54/0x11a0 [ 30.587584] __split_vma+0x5af/0x950 [ 30.588072] ? __pfx___split_vma+0x10/0x10 [ 30.588602] ? find_held_lock+0x2c/0x110 [ 30.589127] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.589702] ? lock_is_held_type+0x9f/0x120 [ 30.590246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.590852] ? mtree_range_walk+0x632/0x900 [ 30.591414] ? mas_walk+0x5c7/0x7c0 [ 30.591904] do_vmi_munmap+0x1f1/0x2b0 [ 30.592396] mmap_region+0x1f9/0x2660 [ 30.592881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.593387] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.594097] ? __pfx_lock_acquire+0x10/0x10 [ 30.594628] ? __pfx_mmap_region+0x10/0x10 [ 30.595165] ? security_mmap_addr+0x7d/0xa0 [ 30.595696] ? get_unmapped_area+0x1f5/0x3f0 [ 30.596274] do_mmap+0x854/0xf00 [ 30.596712] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.597214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.597779] ksys_mmap_pgoff+0x3af/0x500 [ 30.598297] do_syscall_64+0x3f/0x90 [ 30.598777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.599431] RIP: 0033:0x7f4968174d82 [ 30.599894] 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 [ 30.602030] RSP: 002b:00007fffe3da65b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.602933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4968174d82 [ 30.603799] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49675ae000 [ 30.604648] RBP: 00007f49675ae000 R08: 0000000000000009 R09: 0000000000001000 [ 30.605495] R10: 0000000000000812 R11: 0000000000000206 R12: 000056553ee2dec0 [ 30.606348] R13: 00007fffe3da65d0 R14: 00007fffe3da6600 R15: 00007fffe3da6960 [ 30.607217] [ 30.607512] [ 30.607742] Allocated by task 212: [ 30.608181] kasan_save_stack+0x22/0x50 [ 30.608689] kasan_set_track+0x25/0x30 [ 30.609188] __kasan_slab_alloc+0x59/0x70 [ 30.609715] kmem_cache_alloc+0x16b/0x370 [ 30.610233] vm_area_dup+0x20/0x160 [ 30.610685] __split_vma+0x170/0x950 [ 30.611155] split_vma+0xc6/0x110 [ 30.611597] mprotect_fixup+0x8d2/0xb30 [ 30.612103] do_mprotect_pkey+0x87e/0xd40 [ 30.612631] __x64_sys_mprotect+0x78/0xc0 [ 30.613150] do_syscall_64+0x3f/0x90 [ 30.613629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.614276] [ 30.614491] Freed by task 212: [ 30.614885] kasan_save_stack+0x22/0x50 [ 30.615386] kasan_set_track+0x25/0x30 [ 30.615890] kasan_save_free_info+0x2b/0x50 [ 30.616425] __kasan_slab_free+0x10a/0x190 [ 30.616958] kmem_cache_free+0x10d/0x4d0 [ 30.617468] rcu_core+0x8c8/0x2860 [ 30.617913] __do_softirq+0x1b7/0x7d4 [ 30.618400] [ 30.618615] Last potentially related work creation: [ 30.619200] kasan_save_stack+0x22/0x50 [ 30.619698] __kasan_record_aux_stack+0x8e/0xa0 [ 30.620288] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.620929] remove_vma+0x139/0x170 [ 30.621385] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.621943] do_vmi_munmap+0x1f1/0x2b0 [ 30.622429] __vm_munmap+0x138/0x3a0 [ 30.622902] __x64_sys_munmap+0x59/0x80 [ 30.623395] do_syscall_64+0x3f/0x90 [ 30.623879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.624525] [ 30.624746] The buggy address belongs to the object at ffff88801a29a0e8 [ 30.624746] which belongs to the cache vm_area_struct of size 168 [ 30.626292] The buggy address is located 88 bytes inside of [ 30.626292] freed 168-byte region [ffff88801a29a0e8, ffff88801a29a190) [ 30.627699] [ 30.627925] The buggy address belongs to the physical page: [ 30.628590] page:000000007fcf62a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a29a [ 30.629678] memcg:ffff88800977f401 [ 30.630110] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.630757] page_type: 0xffffffff() [ 30.631211] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.632148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800977f401 [ 30.633064] page dumped because: kasan: bad access detected [ 30.633723] [ 30.633941] Memory state around the buggy address: [ 30.634523] ffff88801a29a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.635377] ffff88801a29a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.636236] >ffff88801a29a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.637084] ^ [ 30.637724] ffff88801a29a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.638574] ffff88801a29a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.639429] ================================================================== [ 30.640360] Disabling lock debugging due to kernel taint [ 33.247899] BUG: Bad rss-counter state mm:00000000314c6f35 type:MM_FILEPAGES val:33 [ 33.248429] BUG: Bad rss-counter state mm:00000000314c6f35 type:MM_ANONPAGES val:22 [ 33.674250] BUG: Bad rss-counter state mm:00000000185d8c32 type:MM_FILEPAGES val:33 [ 33.674815] BUG: Bad rss-counter state mm:00000000185d8c32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63761' (ECDSA) to the list of known hosts. 2023/06/21 04:38:56 fuzzer started 2023/06/21 04:38:56 dialing manager at localhost:36067 2023/06/21 04:38:56 checking machine... 2023/06/21 04:38:56 checking revisions... [ 34.363306] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:38:57 testing simple program... [ 34.413095] cgroup: Unknown subsys name 'net' [ 34.450430] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:38:56 Registers: info registers vcpu 0 RAX=1ffffffff0a57f47 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bfa38 RBP=ffff88801588fd28 RSP=ffff88801588fc60 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000000000bf R13=ffff88801588fd60 R14=00000000000000bf R15=ffffc90000655058 RIP=ffffffff815a2a0f 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 00007fd2a64d7900 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=00007fd2a5902dc0 CR3=000000000c96a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b2fb5238fd1a1b1e00000000000ae988 XMM05=0e454865ba14acb100000000001331e8 XMM06=d73926e83cceb0a80000000000131f88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83635ac0 RBX=ffffffff85fa4a98 RCX=ffffffff83635bd6 RDX=0000000000000000 RSI=ffffffff863b2e46 RDI=ffffffff85fa4a98 RBP=ffffffff85fa4a9c RSP=ffff88800da2f6a0 R8 =ffffffff863b2e46 R9 =ffff88800da2f798 R10=0000000000038001 R11=000000000008a835 R12=ffffffff85fa4a98 R13=ffffffff85fa4a98 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f5d56384900 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=00007ffcbea57000 CR3=0000000018256000 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=6720646572637465733a4d41503d706f 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