syzkaller login: [ 31.514463] BUG: Bad rss-counter state mm:000000003efc14da type:MM_FILEPAGES val:33 [ 31.515882] BUG: Bad rss-counter state mm:000000003efc14da type:MM_ANONPAGES val:22 [ 31.684303] ================================================================== [ 31.685386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.686459] Read of size 8 at addr ffff888015827798 by task sshd/221 [ 31.687379] [ 31.687597] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.688477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.689499] Call Trace: [ 31.689823] [ 31.690118] dump_stack_lvl+0x91/0xf0 [ 31.690619] print_report+0xcc/0x620 [ 31.691116] ? __virt_addr_valid+0x102/0x340 [ 31.691677] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.692303] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.692942] kasan_report+0xbe/0xf0 [ 31.693439] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.694092] vma_interval_tree_remove+0xc75/0xec0 [ 31.694705] vma_prepare+0xc54/0x11a0 [ 31.695200] __split_vma+0x5af/0x950 [ 31.695673] ? __pfx___split_vma+0x10/0x10 [ 31.696222] ? find_held_lock+0x2c/0x110 [ 31.696749] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.697331] ? lock_is_held_type+0x9f/0x120 [ 31.697898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.698535] ? mtree_range_walk+0x632/0x900 [ 31.699109] ? mas_walk+0x5c7/0x7c0 [ 31.699600] do_vmi_munmap+0x1f1/0x2b0 [ 31.700100] mmap_region+0x1f9/0x2660 [ 31.700614] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.701157] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.701897] ? __pfx_lock_acquire+0x10/0x10 [ 31.702449] ? __pfx_mmap_region+0x10/0x10 [ 31.702997] ? security_mmap_addr+0x7d/0xa0 [ 31.703542] ? get_unmapped_area+0x1f5/0x3f0 [ 31.704100] do_mmap+0x854/0xf00 [ 31.704552] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.705069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.705664] ksys_mmap_pgoff+0x3af/0x500 [ 31.706174] do_syscall_64+0x3f/0x90 [ 31.706662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.707327] RIP: 0033:0x7f72f5716d82 [ 31.707793] 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 [ 31.709974] RSP: 002b:00007ffe702d1258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.710890] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72f5716d82 [ 31.711759] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72f4b50000 [ 31.712636] RBP: 00007f72f4b50000 R08: 0000000000000009 R09: 0000000000001000 [ 31.713508] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e93d673f70 [ 31.714377] R13: 00007ffe702d1270 R14: 00007ffe702d12a0 R15: 00007ffe702d1600 [ 31.715241] [ 31.715544] [ 31.715758] Allocated by task 214: [ 31.716190] kasan_save_stack+0x22/0x50 [ 31.716706] kasan_set_track+0x25/0x30 [ 31.717209] __kasan_slab_alloc+0x59/0x70 [ 31.717771] kmem_cache_alloc+0x16b/0x370 [ 31.718299] vm_area_dup+0x20/0x160 [ 31.718773] __split_vma+0x170/0x950 [ 31.719248] split_vma+0xc6/0x110 [ 31.719696] mprotect_fixup+0x8d2/0xb30 [ 31.720210] do_mprotect_pkey+0x87e/0xd40 [ 31.720733] __x64_sys_mprotect+0x78/0xc0 [ 31.721271] do_syscall_64+0x3f/0x90 [ 31.721756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.722416] [ 31.722632] Freed by task 204: [ 31.723032] kasan_save_stack+0x22/0x50 [ 31.723540] kasan_set_track+0x25/0x30 [ 31.724038] kasan_save_free_info+0x2b/0x50 [ 31.724570] __kasan_slab_free+0x10a/0x190 [ 31.725104] kmem_cache_free+0x10d/0x4d0 [ 31.725637] rcu_core+0x8c8/0x2860 [ 31.726076] __do_softirq+0x1b7/0x7d4 [ 31.726555] [ 31.726773] Last potentially related work creation: [ 31.727369] kasan_save_stack+0x22/0x50 [ 31.727879] __kasan_record_aux_stack+0x8e/0xa0 [ 31.728455] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.729109] remove_vma+0x139/0x170 [ 31.729567] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.730144] do_vmi_munmap+0x1f1/0x2b0 [ 31.730633] __vm_munmap+0x138/0x3a0 [ 31.731115] __x64_sys_munmap+0x59/0x80 [ 31.731613] do_syscall_64+0x3f/0x90 [ 31.732094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.732750] [ 31.732974] The buggy address belongs to the object at ffff888015827740 [ 31.732974] which belongs to the cache vm_area_struct of size 168 [ 31.734477] The buggy address is located 88 bytes inside of [ 31.734477] freed 168-byte region [ffff888015827740, ffff8880158277e8) [ 31.735916] [ 31.736137] The buggy address belongs to the physical page: [ 31.736811] page:00000000dcee2f64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15827 [ 31.737942] memcg:ffff888018700601 [ 31.738384] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.739043] page_type: 0xffffffff() [ 31.739499] raw: 0100000000000200 ffff8880087a0c80 ffffea00006784c0 dead000000000002 [ 31.740433] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018700601 [ 31.741367] page dumped because: kasan: bad access detected [ 31.742035] [ 31.742259] Memory state around the buggy address: [ 31.742850] ffff888015827680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.743713] ffff888015827700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.744580] >ffff888015827780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.745443] ^ [ 31.745955] ffff888015827800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.746830] ffff888015827880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.747701] ================================================================== [ 31.748774] Disabling lock debugging due to kernel taint [ 33.650183] BUG: Bad rss-counter state mm:000000004c14aec2 type:MM_FILEPAGES val:33 [ 33.651262] BUG: Bad rss-counter state mm:000000004c14aec2 type:MM_ANONPAGES val:22 [ 34.103758] BUG: Bad rss-counter state mm:00000000592a0b1f type:MM_FILEPAGES val:33 [ 34.105304] BUG: Bad rss-counter state mm:00000000592a0b1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58578' (ECDSA) to the list of known hosts. 2023/06/20 16:45:35 fuzzer started 2023/06/20 16:45:35 dialing manager at localhost:36067 2023/06/20 16:45:35 checking machine... 2023/06/20 16:45:35 checking revisions... [ 34.873893] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:45:36 testing simple program... [ 34.917463] cgroup: Unknown subsys name 'net' [ 35.037241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:45:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055ab81cbf750 RCX=000055ab81c8f010 RDX=00007f3be24a7be0 RSI=0000000000000000 RDI=000055ab81cd4290 RBP=000055ab81cc6640 RSP=00007fff3e65efe0 R8 =0000000000000007 R9 =00007fff3e6583a8 R10=000055ab81cd42c0 R11=0000000000000246 R12=000055ab81cae350 R13=0000000000000000 R14=00007fff3e65f3c0 R15=00007fff3e65f170 RIP=00007f3be2a1a9c3 RFL=00000206 [-----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 00007f3be1ef5900 00000000 00000000 GS =0000 0000000000000000 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=00007fff3e659000 CR3=000000000f1f4000 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=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 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=0000000000000001 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=00007f7235516190 CR3=000000000d930000 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=2035333a35343a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a35343a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000