syzkaller login: [ 28.912121] BUG: Bad rss-counter state mm:00000000e30c6939 type:MM_FILEPAGES val:33 [ 28.913141] BUG: Bad rss-counter state mm:00000000e30c6939 type:MM_ANONPAGES val:22 [ 29.077059] ================================================================== [ 29.077940] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.078820] Read of size 8 at addr ffff8880158dd228 by task sshd/220 [ 29.079538] [ 29.079746] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.080657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.081567] Call Trace: [ 29.081869] [ 29.082142] dump_stack_lvl+0x91/0xf0 [ 29.082605] print_report+0xcc/0x620 [ 29.083065] ? __virt_addr_valid+0x102/0x340 [ 29.083587] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.084168] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.084773] kasan_report+0xbe/0xf0 [ 29.085222] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.085805] vma_interval_tree_remove+0xc75/0xec0 [ 29.086377] vma_prepare+0xc54/0x11a0 [ 29.086826] __split_vma+0x5af/0x950 [ 29.087273] ? __pfx___split_vma+0x10/0x10 [ 29.087769] ? find_held_lock+0x2c/0x110 [ 29.088266] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.088814] ? lock_is_held_type+0x9f/0x120 [ 29.089327] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.089901] ? mtree_range_walk+0x632/0x900 [ 29.090426] ? mas_walk+0x5c7/0x7c0 [ 29.090875] do_vmi_munmap+0x1f1/0x2b0 [ 29.091342] mmap_region+0x1f9/0x2660 [ 29.091796] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.092281] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.092966] ? __pfx_lock_acquire+0x10/0x10 [ 29.093467] ? __pfx_mmap_region+0x10/0x10 [ 29.093967] ? security_mmap_addr+0x7d/0xa0 [ 29.094468] ? get_unmapped_area+0x1f5/0x3f0 [ 29.094989] do_mmap+0x854/0xf00 [ 29.095406] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.095872] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.096421] ksys_mmap_pgoff+0x3af/0x500 [ 29.096902] do_syscall_64+0x3f/0x90 [ 29.097357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.097970] RIP: 0033:0x7fdeba3a1d82 [ 29.098398] 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 [ 29.100384] RSP: 002b:00007ffd69fdfe08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.101239] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdeba3a1d82 [ 29.102032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdeb97db000 [ 29.102836] RBP: 00007fdeb97db000 R08: 0000000000000009 R09: 0000000000001000 [ 29.103635] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628d9866ec0 [ 29.104439] R13: 00007ffd69fdfe20 R14: 00007ffd69fdfe50 R15: 00007ffd69fe01b0 [ 29.105242] [ 29.105518] [ 29.105725] Allocated by task 212: [ 29.106137] kasan_save_stack+0x22/0x50 [ 29.106616] kasan_set_track+0x25/0x30 [ 29.107080] __kasan_slab_alloc+0x59/0x70 [ 29.107574] kmem_cache_alloc+0x16b/0x370 [ 29.108065] vm_area_dup+0x20/0x160 [ 29.108513] __split_vma+0x170/0x950 [ 29.108953] split_vma+0xc6/0x110 [ 29.109367] mprotect_fixup+0x8d2/0xb30 [ 29.109837] do_mprotect_pkey+0x87e/0xd40 [ 29.110326] __x64_sys_mprotect+0x78/0xc0 [ 29.110818] do_syscall_64+0x3f/0x90 [ 29.111268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.111880] [ 29.112089] Freed by task 212: [ 29.112469] kasan_save_stack+0x22/0x50 [ 29.112949] kasan_set_track+0x25/0x30 [ 29.113416] kasan_save_free_info+0x2b/0x50 [ 29.113920] __kasan_slab_free+0x10a/0x190 [ 29.114420] kmem_cache_free+0x10d/0x4d0 [ 29.114900] rcu_core+0x8c8/0x2860 [ 29.115326] __do_softirq+0x1b7/0x7d4 [ 29.115777] [ 29.115981] Last potentially related work creation: [ 29.116562] kasan_save_stack+0x22/0x50 [ 29.117059] __kasan_record_aux_stack+0x8e/0xa0 [ 29.117639] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.118275] remove_vma+0x139/0x170 [ 29.118726] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.119279] do_vmi_munmap+0x1f1/0x2b0 [ 29.119755] __vm_munmap+0x138/0x3a0 [ 29.120215] __x64_sys_munmap+0x59/0x80 [ 29.120711] do_syscall_64+0x3f/0x90 [ 29.121188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.121821] [ 29.122035] The buggy address belongs to the object at ffff8880158dd1d0 [ 29.122035] which belongs to the cache vm_area_struct of size 168 [ 29.123519] The buggy address is located 88 bytes inside of [ 29.123519] freed 168-byte region [ffff8880158dd1d0, ffff8880158dd278) [ 29.124938] [ 29.125150] The buggy address belongs to the physical page: [ 29.125805] page:000000002a7678aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158dd [ 29.126897] memcg:ffff88800e430f01 [ 29.127324] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.127961] page_type: 0xffffffff() [ 29.128428] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.129354] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e430f01 [ 29.130259] page dumped because: kasan: bad access detected [ 29.130922] [ 29.131133] Memory state around the buggy address: [ 29.131708] ffff8880158dd100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.132574] ffff8880158dd180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.133424] >ffff8880158dd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.134273] ^ [ 29.134825] ffff8880158dd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.135683] ffff8880158dd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.136548] ================================================================== [ 29.137516] Disabling lock debugging due to kernel taint [ 30.892871] BUG: Bad rss-counter state mm:000000005bc01bbb type:MM_FILEPAGES val:33 [ 30.893552] BUG: Bad rss-counter state mm:000000005bc01bbb type:MM_ANONPAGES val:22 [ 31.239830] BUG: Bad rss-counter state mm:0000000093dc6c47 type:MM_FILEPAGES val:33 [ 31.240459] BUG: Bad rss-counter state mm:0000000093dc6c47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32874' (ECDSA) to the list of known hosts. 2023/06/20 21:28:26 fuzzer started 2023/06/20 21:28:26 dialing manager at localhost:36067 2023/06/20 21:28:26 checking machine... 2023/06/20 21:28:26 checking revisions... [ 31.892943] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:28:27 testing simple program... [ 31.933456] cgroup: Unknown subsys name 'net' [ 31.987409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:28:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b3c26 RDX=1ffff11003051ed4 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801828f6b0 RSP=ffff88801828f5e8 R8 =ffffffff863b3c2a R9 =ffff88801828f698 R10=0000000000038001 R11=000000000008aa85 R12=ffff88801828f6b8 R13=ffff88801828f6a0 R14=ffff88801828ff40 R15=ffff88801828f658 RIP=ffffffff81131c60 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 00007fc996d60900 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=00007fff07981000 CR3=000000000eb06000 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=00007f0f34503750 CR3=000000000e0b6000 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=2036323a38323a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a38323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000