syzkaller login: [ 32.570202] BUG: Bad rss-counter state mm:00000000fc18abb6 type:MM_FILEPAGES val:33 [ 32.571215] BUG: Bad rss-counter state mm:00000000fc18abb6 type:MM_ANONPAGES val:22 [ 32.735274] ================================================================== [ 32.736197] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.737271] Read of size 8 at addr ffff888019619058 by task sshd/220 [ 32.738077] [ 32.738294] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.739164] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.740161] Call Trace: [ 32.740480] [ 32.740769] dump_stack_lvl+0x91/0xf0 [ 32.741271] print_report+0xcc/0x620 [ 32.741748] ? __virt_addr_valid+0x102/0x340 [ 32.742308] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.742951] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.743570] kasan_report+0xbe/0xf0 [ 32.744046] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.744674] vma_interval_tree_remove+0xc75/0xec0 [ 32.745286] vma_prepare+0xc54/0x11a0 [ 32.745770] __split_vma+0x5af/0x950 [ 32.746242] ? __pfx___split_vma+0x10/0x10 [ 32.746779] ? find_held_lock+0x2c/0x110 [ 32.747296] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.747863] ? lock_is_held_type+0x9f/0x120 [ 32.748396] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.749002] ? mtree_range_walk+0x632/0x900 [ 32.749558] ? mas_walk+0x5c7/0x7c0 [ 32.750030] do_vmi_munmap+0x1f1/0x2b0 [ 32.750532] mmap_region+0x1f9/0x2660 [ 32.751017] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.751531] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.752247] ? __pfx_lock_acquire+0x10/0x10 [ 32.752779] ? __pfx_mmap_region+0x10/0x10 [ 32.753309] ? security_mmap_addr+0x7d/0xa0 [ 32.753834] ? get_unmapped_area+0x1f5/0x3f0 [ 32.754388] do_mmap+0x854/0xf00 [ 32.754855] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.755357] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.755917] ksys_mmap_pgoff+0x3af/0x500 [ 32.756429] do_syscall_64+0x3f/0x90 [ 32.756903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.757545] RIP: 0033:0x7f79edc08d82 [ 32.758002] 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 [ 32.760148] RSP: 002b:00007fff82cebfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.761047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79edc08d82 [ 32.761890] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79ed042000 [ 32.762732] RBP: 00007f79ed042000 R08: 0000000000000009 R09: 0000000000001000 [ 32.763603] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa5450bec0 [ 32.764452] R13: 00007fff82cebff0 R14: 00007fff82cec020 R15: 00007fff82cec380 [ 32.765315] [ 32.765605] [ 32.765820] Allocated by task 213: [ 32.766250] kasan_save_stack+0x22/0x50 [ 32.766759] kasan_set_track+0x25/0x30 [ 32.767249] __kasan_slab_alloc+0x59/0x70 [ 32.767770] kmem_cache_alloc+0x16b/0x370 [ 32.768286] vm_area_dup+0x20/0x160 [ 32.768741] __split_vma+0x170/0x950 [ 32.769206] split_vma+0xc6/0x110 [ 32.769647] mprotect_fixup+0x8d2/0xb30 [ 32.770149] do_mprotect_pkey+0x87e/0xd40 [ 32.770670] __x64_sys_mprotect+0x78/0xc0 [ 32.771196] do_syscall_64+0x3f/0x90 [ 32.771671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.772310] [ 32.772528] Freed by task 213: [ 32.772919] kasan_save_stack+0x22/0x50 [ 32.773423] kasan_set_track+0x25/0x30 [ 32.773919] kasan_save_free_info+0x2b/0x50 [ 32.774446] __kasan_slab_free+0x10a/0x190 [ 32.774994] kmem_cache_free+0x10d/0x4d0 [ 32.775496] rcu_core+0x8c8/0x2860 [ 32.775942] __do_softirq+0x1b7/0x7d4 [ 32.776424] [ 32.776638] Last potentially related work creation: [ 32.777231] kasan_save_stack+0x22/0x50 [ 32.777737] __kasan_record_aux_stack+0x8e/0xa0 [ 32.778381] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.779039] remove_vma+0x139/0x170 [ 32.779491] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.780054] do_vmi_munmap+0x1f1/0x2b0 [ 32.780544] __vm_munmap+0x138/0x3a0 [ 32.781015] __x64_sys_munmap+0x59/0x80 [ 32.781513] do_syscall_64+0x3f/0x90 [ 32.781987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.782633] [ 32.782869] The buggy address belongs to the object at ffff888019619000 [ 32.782869] which belongs to the cache vm_area_struct of size 168 [ 32.784346] The buggy address is located 88 bytes inside of [ 32.784346] freed 168-byte region [ffff888019619000, ffff8880196190a8) [ 32.785761] [ 32.785977] The buggy address belongs to the physical page: [ 32.786638] page:00000000aa80b39b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19619 [ 32.787745] memcg:ffff88800952e401 [ 32.788172] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.788824] page_type: 0xffffffff() [ 32.789276] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.790203] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800952e401 [ 32.791128] page dumped because: kasan: bad access detected [ 32.791783] [ 32.792002] Memory state around the buggy address: [ 32.792593] ffff888019618f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.793462] ffff888019618f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.794321] >ffff888019619000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.795183] ^ [ 32.795906] ffff888019619080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.796761] ffff888019619100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.797610] ================================================================== [ 32.798520] Disabling lock debugging due to kernel taint [ 35.971134] BUG: Bad rss-counter state mm:000000005e8bee74 type:MM_FILEPAGES val:33 [ 35.972719] BUG: Bad rss-counter state mm:000000005e8bee74 type:MM_ANONPAGES val:22 [ 36.378770] BUG: Bad rss-counter state mm:00000000d1e8b437 type:MM_FILEPAGES val:33 [ 36.379943] BUG: Bad rss-counter state mm:00000000d1e8b437 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33400' (ECDSA) to the list of known hosts. 2023/06/20 06:01:15 fuzzer started 2023/06/20 06:01:15 dialing manager at localhost:44161 2023/06/20 06:01:15 checking machine... 2023/06/20 06:01:15 checking revisions... [ 37.072030] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:01:15 testing simple program... [ 37.128176] cgroup: Unknown subsys name 'net' [ 37.185532] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:01:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff84531da6 RDX=000000000003531d RSI=000000000003531d RDI=ffffffff865bc834 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007f4fee728900 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=00007f4fedb80f20 CR3=000000000c5d8000 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=5e1a9ca9fb0ca4bd0540881551317c8c XMM02=000000000011e3e8d59e07bde36eea69 XMM03=000000000011e510ec2efd57dc4c00df XMM04=ce8a9062ccf2803d00000000000ae988 XMM05=d8efe2c7286af46e0000000000135ad0 XMM06=19e9129bd510f2350000000000134968 XMM07=fb795ef6d65770560000000000124e68 XMM08=2c67c8bc2e329bc3000000000011e510 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860acb48 RBX=ffffffff85da037c RCX=ffffffff8120674e RDX=0000000000000000 RSI=ffffffff860acb48 RDI=ffffffff85da037c RBP=ffffffff85da0380 RSP=ffff888008e578c0 R8 =ffffffff860acb48 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000009bea R12=ffffffff85da037c R13=ffffffff85da037c R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb3 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 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=00007ffe58ce1000 CR3=00000000146c2000 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