syzkaller login: [ 32.717913] BUG: Bad rss-counter state mm:000000006a8aabe2 type:MM_FILEPAGES val:33 [ 32.718602] BUG: Bad rss-counter state mm:000000006a8aabe2 type:MM_ANONPAGES val:22 [ 32.891456] ================================================================== [ 32.892425] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.893096] Read of size 8 at addr ffff8880198306b0 by task sshd/221 [ 32.893601] [ 32.893788] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.894400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.895513] Call Trace: [ 32.895756] [ 32.901986] dump_stack_lvl+0x91/0xf0 [ 32.902328] print_report+0xcc/0x620 [ 32.902656] ? __virt_addr_valid+0x102/0x340 [ 32.903075] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.903493] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.903909] kasan_report+0xbe/0xf0 [ 32.904281] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.904703] vma_interval_tree_remove+0xc75/0xec0 [ 32.905157] vma_prepare+0xc54/0x11a0 [ 32.905482] __split_vma+0x5af/0x950 [ 32.905816] ? __pfx___split_vma+0x10/0x10 [ 32.906233] ? find_held_lock+0x2c/0x110 [ 32.906582] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.907038] ? lock_is_held_type+0x9f/0x120 [ 32.907398] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.907799] ? mtree_range_walk+0x632/0x900 [ 32.908212] ? mas_walk+0x5c7/0x7c0 [ 32.908531] do_vmi_munmap+0x1f1/0x2b0 [ 32.908897] mmap_region+0x1f9/0x2660 [ 32.909282] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.909655] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.910207] ? __pfx_lock_acquire+0x10/0x10 [ 32.910571] ? __pfx_mmap_region+0x10/0x10 [ 32.910928] ? security_mmap_addr+0x7d/0xa0 [ 32.911347] ? get_unmapped_area+0x1f5/0x3f0 [ 32.911716] do_mmap+0x854/0xf00 [ 32.912102] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.912439] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.912844] ksys_mmap_pgoff+0x3af/0x500 [ 32.913233] do_syscall_64+0x3f/0x90 [ 32.913551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.914117] RIP: 0033:0x7f07fab6dd82 [ 32.914423] 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 [ 32.915896] RSP: 002b:00007ffeae3a52d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.916556] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f07fab6dd82 [ 32.917208] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f07f9fa7000 [ 32.917803] RBP: 00007f07f9fa7000 R08: 0000000000000009 R09: 0000000000001000 [ 32.918422] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b61641ec0 [ 32.919027] R13: 00007ffeae3a52f0 R14: 00007ffeae3a5320 R15: 00007ffeae3a5680 [ 32.919586] [ 32.919792] [ 32.920015] Allocated by task 213: [ 32.920301] kasan_save_stack+0x22/0x50 [ 32.920642] kasan_set_track+0x25/0x30 [ 32.921067] __kasan_slab_alloc+0x59/0x70 [ 32.921418] kmem_cache_alloc+0x16b/0x370 [ 32.921781] vm_area_dup+0x20/0x160 [ 32.922126] __split_vma+0x170/0x950 [ 32.922438] split_vma+0xc6/0x110 [ 32.922731] mprotect_fixup+0x8d2/0xb30 [ 32.923112] do_mprotect_pkey+0x87e/0xd40 [ 32.923459] __x64_sys_mprotect+0x78/0xc0 [ 32.923825] do_syscall_64+0x3f/0x90 [ 32.924211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.924636] [ 32.924792] Freed by task 213: [ 32.925119] kasan_save_stack+0x22/0x50 [ 32.925454] kasan_set_track+0x25/0x30 [ 32.925821] kasan_save_free_info+0x2b/0x50 [ 32.926264] __kasan_slab_free+0x10a/0x190 [ 32.926621] kmem_cache_free+0x10d/0x4d0 [ 32.927017] rcu_core+0x8c8/0x2860 [ 32.927312] __do_softirq+0x1b7/0x7d4 [ 32.927628] [ 32.927783] Last potentially related work creation: [ 32.928251] kasan_save_stack+0x22/0x50 [ 32.928590] __kasan_record_aux_stack+0x8e/0xa0 [ 32.929019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.929443] remove_vma+0x139/0x170 [ 32.929759] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.930178] do_vmi_munmap+0x1f1/0x2b0 [ 32.930504] __vm_munmap+0x138/0x3a0 [ 32.930815] __x64_sys_munmap+0x59/0x80 [ 32.931207] do_syscall_64+0x3f/0x90 [ 32.931520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.932035] [ 32.932178] The buggy address belongs to the object at ffff888019830658 [ 32.932178] which belongs to the cache vm_area_struct of size 168 [ 32.933200] The buggy address is located 88 bytes inside of [ 32.933200] freed 168-byte region [ffff888019830658, ffff888019830700) [ 32.934224] [ 32.934369] The buggy address belongs to the physical page: [ 32.934813] page:00000000194b278f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19830 [ 32.935584] memcg:ffff88800ef27c01 [ 32.935863] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.936357] page_type: 0xffffffff() [ 32.936657] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.937306] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef27c01 [ 32.937921] page dumped because: kasan: bad access detected [ 32.938402] [ 32.938548] Memory state around the buggy address: [ 32.938974] ffff888019830580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.939543] ffff888019830600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.940154] >ffff888019830680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.940714] ^ [ 32.941164] ffff888019830700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.941742] ffff888019830780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.942335] ================================================================== [ 32.957724] Disabling lock debugging due to kernel taint [ 36.496095] BUG: Bad rss-counter state mm:00000000c27fb910 type:MM_FILEPAGES val:33 [ 36.496753] BUG: Bad rss-counter state mm:00000000c27fb910 type:MM_ANONPAGES val:22 [ 37.307796] BUG: Bad rss-counter state mm:00000000d44d561a type:MM_FILEPAGES val:33 [ 37.308471] BUG: Bad rss-counter state mm:00000000d44d561a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1283' (ECDSA) to the list of known hosts. 2023/06/20 10:19:02 fuzzer started 2023/06/20 10:19:03 dialing manager at localhost:44161 2023/06/20 10:19:03 checking machine... 2023/06/20 10:19:03 checking revisions... 2023/06/20 10:19:03 testing simple program... [ 38.322366] kmemleak: Automatic memory scanning thread ended [ 38.383784] cgroup: Unknown subsys name 'net' [ 38.429699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:19:01 Registers: info registers vcpu 0 RAX=ffffffff8111a680 RBX=0000000000000000 RCX=ffffffff81128d81 RDX=1ffffffff0a58b99 RSI=0000000000000000 RDI=00000000000000b0 RBP=ffffffff852c5cc0 RSP=ffff88806ce09ea0 R8 =0000000000000001 R9 =ffffed100d9c5059 R10=ffff88806ce282cf R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8111a68c 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 00007f9a57e70700 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=00007f0efbd70328 CR3=000000000eec0000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30333937342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000200 RBX=ffff88801936abc0 RCX=ffff88806cb61800 RDX=0000000000000000 RSI=ffff88801936abc0 RDI=ffff8880087b6500 RBP=ffff8880087b6500 RSP=ffff888008e57cd8 R8 =0000000028b3ac31 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000000128 R12=0000000000000200 R13=ffffea000064da80 R14=ffffffff813782a8 R15=ffff88800c66b380 RIP=ffffffff81534320 RFL=00000006 [-----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 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=00007f944172d260 CR3=000000000fd8a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000