syzkaller login: [ 30.876129] BUG: Bad rss-counter state mm:00000000f2507a52 type:MM_FILEPAGES val:33 [ 30.877313] BUG: Bad rss-counter state mm:00000000f2507a52 type:MM_ANONPAGES val:22 [ 30.916607] ================================================================== [ 30.917556] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.918565] Read of size 8 at addr ffff888010154c20 by task sshd/220 [ 30.919331] [ 30.919552] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.920438] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.921404] Call Trace: [ 30.921721] [ 30.922006] dump_stack_lvl+0x91/0xf0 [ 30.922495] print_report+0xcc/0x620 [ 30.922982] ? __virt_addr_valid+0x102/0x340 [ 30.923537] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.924183] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.924795] kasan_report+0xbe/0xf0 [ 30.925268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.925891] vma_interval_tree_remove+0xc75/0xec0 [ 30.926488] vma_prepare+0xc54/0x11a0 [ 30.926964] __split_vma+0x5af/0x950 [ 30.927433] ? __pfx___split_vma+0x10/0x10 [ 30.927966] ? find_held_lock+0x2c/0x110 [ 30.928485] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.929045] ? lock_is_held_type+0x9f/0x120 [ 30.929587] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.930193] ? mtree_range_walk+0x632/0x900 [ 30.930743] ? mas_walk+0x5c7/0x7c0 [ 30.931220] do_vmi_munmap+0x1f1/0x2b0 [ 30.931727] mmap_region+0x1f9/0x2660 [ 30.932223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.932734] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.933449] ? __pfx_lock_acquire+0x10/0x10 [ 30.933981] ? __pfx_mmap_region+0x10/0x10 [ 30.934511] ? security_mmap_addr+0x7d/0xa0 [ 30.935046] ? get_unmapped_area+0x1f5/0x3f0 [ 30.935597] do_mmap+0x854/0xf00 [ 30.936064] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.936564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.937129] ksys_mmap_pgoff+0x3af/0x500 [ 30.937634] do_syscall_64+0x3f/0x90 [ 30.938116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938773] RIP: 0033:0x7f8a183ebd82 [ 30.939237] 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 [ 30.941380] RSP: 002b:00007ffc33c3bc58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.942283] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a183ebd82 [ 30.943133] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a17825000 [ 30.944007] RBP: 00007f8a17825000 R08: 0000000000000009 R09: 0000000000001000 [ 30.944853] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b37702b20 [ 30.945698] R13: 00007ffc33c3bc70 R14: 00007ffc33c3bca0 R15: 00007ffc33c3c000 [ 30.946559] [ 30.946851] [ 30.947069] Allocated by task 213: [ 30.947503] kasan_save_stack+0x22/0x50 [ 30.948023] kasan_set_track+0x25/0x30 [ 30.948516] __kasan_slab_alloc+0x59/0x70 [ 30.949039] kmem_cache_alloc+0x16b/0x370 [ 30.949558] vm_area_dup+0x20/0x160 [ 30.950012] __split_vma+0x170/0x950 [ 30.950477] split_vma+0xc6/0x110 [ 30.950917] mprotect_fixup+0x8d2/0xb30 [ 30.951422] do_mprotect_pkey+0x87e/0xd40 [ 30.951951] __x64_sys_mprotect+0x78/0xc0 [ 30.952471] do_syscall_64+0x3f/0x90 [ 30.952948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.953608] [ 30.953827] Freed by task 213: [ 30.954225] kasan_save_stack+0x22/0x50 [ 30.954723] kasan_set_track+0x25/0x30 [ 30.955216] kasan_save_free_info+0x2b/0x50 [ 30.955758] __kasan_slab_free+0x10a/0x190 [ 30.956289] kmem_cache_free+0x10d/0x4d0 [ 30.956798] rcu_core+0x8c8/0x2860 [ 30.957246] __do_softirq+0x1b7/0x7d4 [ 30.957722] [ 30.957938] Last potentially related work creation: [ 30.958513] kasan_save_stack+0x22/0x50 [ 30.959032] __kasan_record_aux_stack+0x8e/0xa0 [ 30.959616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.960272] remove_vma+0x139/0x170 [ 30.960717] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.961276] do_vmi_munmap+0x1f1/0x2b0 [ 30.961769] __vm_munmap+0x138/0x3a0 [ 30.962235] __x64_sys_munmap+0x59/0x80 [ 30.962728] do_syscall_64+0x3f/0x90 [ 30.963208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.963867] [ 30.964081] The buggy address belongs to the object at ffff888010154bc8 [ 30.964081] which belongs to the cache vm_area_struct of size 168 [ 30.965555] The buggy address is located 88 bytes inside of [ 30.965555] freed 168-byte region [ffff888010154bc8, ffff888010154c70) [ 30.966975] [ 30.967202] The buggy address belongs to the physical page: [ 30.967920] page:000000005522c76d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10154 [ 30.969097] memcg:ffff88800c5be501 [ 30.969558] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.970254] page_type: 0xffffffff() [ 30.970738] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.971740] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5be501 [ 30.972724] page dumped because: kasan: bad access detected [ 30.973439] [ 30.973665] Memory state around the buggy address: [ 30.974286] ffff888010154b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.975202] ffff888010154b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.976075] >ffff888010154c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.976933] ^ [ 30.977477] ffff888010154c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.978335] ffff888010154d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.979207] ================================================================== [ 30.980271] Disabling lock debugging due to kernel taint [ 33.285187] BUG: Bad rss-counter state mm:00000000759edccb type:MM_FILEPAGES val:33 [ 33.286141] BUG: Bad rss-counter state mm:00000000759edccb type:MM_ANONPAGES val:22 [ 33.775946] BUG: Bad rss-counter state mm:000000004ce6064b type:MM_FILEPAGES val:33 [ 33.777182] BUG: Bad rss-counter state mm:000000004ce6064b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20172' (ECDSA) to the list of known hosts. 2023/06/21 03:09:40 fuzzer started 2023/06/21 03:09:41 dialing manager at localhost:36067 2023/06/21 03:09:41 checking machine... 2023/06/21 03:09:41 checking revisions... [ 34.395877] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:09:41 testing simple program... [ 34.446184] cgroup: Unknown subsys name 'net' [ 34.485348] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:09:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81970bad RDX=ffff888015828000 RSI=0000000000000000 RDI=0000000000000006 RBP=0000000000000503 RSP=ffff888015827578 R8 =0000000000000006 R9 =0000000000001000 R10=0000000000001000 R11=00000000000b6d53 R12=ffff88800b5b2910 R13=0000000000000000 R14=ffff88800b5b2910 R15=0000000000000503 RIP=ffffffff814c027c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f36d1103900 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=00007f36d05368e0 CR3=000000000cacc000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=33aa785b8e9389ad00000000000ae988 XMM05=882a457178507b350000000000135498 XMM06=4fda316b135da52b0000000000134288 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100d9e13a2 RBX=1ffff1100d9e13a2 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dbca018 RBP=0000000000000001 RSP=ffff88806cf09d00 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800dbca018 R15=0000000000000000 RIP=ffffffff812d8ecd RFL=00000082 [--S----] 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 00007ff96d9a0900 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=00007ff96d97f020 CR3=000000000d5f2000 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