syzkaller login: [ 30.959226] BUG: Bad rss-counter state mm:000000005ab473ed type:MM_FILEPAGES val:33 [ 30.960039] BUG: Bad rss-counter state mm:000000005ab473ed type:MM_ANONPAGES val:22 [ 31.131035] ================================================================== [ 31.132042] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.133093] Read of size 8 at addr ffff888019707140 by task sshd/220 [ 31.133926] [ 31.134168] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.135243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.136327] Call Trace: [ 31.136730] [ 31.137039] dump_stack_lvl+0x91/0xf0 [ 31.137580] print_report+0xcc/0x620 [ 31.138115] ? __virt_addr_valid+0x102/0x340 [ 31.138718] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.139400] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.140073] kasan_report+0xbe/0xf0 [ 31.140612] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.141295] vma_interval_tree_remove+0xc75/0xec0 [ 31.141955] vma_prepare+0xc54/0x11a0 [ 31.142483] __split_vma+0x5af/0x950 [ 31.143006] ? __pfx___split_vma+0x10/0x10 [ 31.143590] ? find_held_lock+0x2c/0x110 [ 31.144143] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.144792] ? lock_is_held_type+0x9f/0x120 [ 31.145412] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.146120] ? mtree_range_walk+0x632/0x900 [ 31.146733] ? mas_walk+0x5c7/0x7c0 [ 31.147240] do_vmi_munmap+0x1f1/0x2b0 [ 31.147769] mmap_region+0x1f9/0x2660 [ 31.148286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.148857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.149628] ? __pfx_lock_acquire+0x10/0x10 [ 31.150211] ? __pfx_mmap_region+0x10/0x10 [ 31.150792] ? security_mmap_addr+0x7d/0xa0 [ 31.151365] ? get_unmapped_area+0x1f5/0x3f0 [ 31.151978] do_mmap+0x854/0xf00 [ 31.152451] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.153014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.153650] ksys_mmap_pgoff+0x3af/0x500 [ 31.154236] do_syscall_64+0x3f/0x90 [ 31.154777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.155505] RIP: 0033:0x7fb15ebffd82 [ 31.156013] 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 [ 31.158445] RSP: 002b:00007ffc2bbc1d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.159481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb15ebffd82 [ 31.160457] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb15e039000 [ 31.161407] RBP: 00007fb15e039000 R08: 0000000000000009 R09: 0000000000001000 [ 31.162348] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f1dfc3ec0 [ 31.163300] R13: 00007ffc2bbc1d40 R14: 00007ffc2bbc1d70 R15: 00007ffc2bbc20d0 [ 31.164265] [ 31.164603] [ 31.164843] Allocated by task 213: [ 31.165322] kasan_save_stack+0x22/0x50 [ 31.165889] kasan_set_track+0x25/0x30 [ 31.166445] __kasan_slab_alloc+0x59/0x70 [ 31.167029] kmem_cache_alloc+0x16b/0x370 [ 31.167604] vm_area_dup+0x20/0x160 [ 31.168131] __split_vma+0x170/0x950 [ 31.168669] split_vma+0xc6/0x110 [ 31.169186] mprotect_fixup+0x8d2/0xb30 [ 31.169762] do_mprotect_pkey+0x87e/0xd40 [ 31.170367] __x64_sys_mprotect+0x78/0xc0 [ 31.170972] do_syscall_64+0x3f/0x90 [ 31.171521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172267] [ 31.172514] Freed by task 213: [ 31.172991] kasan_save_stack+0x22/0x50 [ 31.173576] kasan_set_track+0x25/0x30 [ 31.174153] kasan_save_free_info+0x2b/0x50 [ 31.174777] __kasan_slab_free+0x10a/0x190 [ 31.175401] kmem_cache_free+0x10d/0x4d0 [ 31.176052] rcu_core+0x8c8/0x2860 [ 31.176587] __do_softirq+0x1b7/0x7d4 [ 31.177149] [ 31.177400] Last potentially related work creation: [ 31.178095] kasan_save_stack+0x22/0x50 [ 31.178670] __kasan_record_aux_stack+0x8e/0xa0 [ 31.179330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.180064] remove_vma+0x139/0x170 [ 31.180588] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.181232] do_vmi_munmap+0x1f1/0x2b0 [ 31.181790] __vm_munmap+0x138/0x3a0 [ 31.182329] __x64_sys_munmap+0x59/0x80 [ 31.182901] do_syscall_64+0x3f/0x90 [ 31.183449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.184190] [ 31.184438] The buggy address belongs to the object at ffff8880197070e8 [ 31.184438] which belongs to the cache vm_area_struct of size 168 [ 31.186166] The buggy address is located 88 bytes inside of [ 31.186166] freed 168-byte region [ffff8880197070e8, ffff888019707190) [ 31.187802] [ 31.188054] The buggy address belongs to the physical page: [ 31.188895] page:00000000c02195b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19707 [ 31.190186] memcg:ffff88800d92b501 [ 31.190690] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.191513] page_type: 0xffffffff() [ 31.192042] raw: 0100000000000200 ffff8880087a0c80 ffffea000025cf00 dead00000000000d [ 31.193118] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d92b501 [ 31.194201] page dumped because: kasan: bad access detected [ 31.194990] [ 31.195247] Memory state around the buggy address: [ 31.195939] ffff888019707000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.196970] ffff888019707080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.197996] >ffff888019707100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.199067] ^ [ 31.199866] ffff888019707180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.200930] ffff888019707200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.202002] ================================================================== [ 31.203405] Disabling lock debugging due to kernel taint [ 32.930774] BUG: Bad rss-counter state mm:0000000083fa0663 type:MM_FILEPAGES val:33 [ 32.931396] BUG: Bad rss-counter state mm:0000000083fa0663 type:MM_ANONPAGES val:22 [ 33.417827] BUG: Bad rss-counter state mm:000000002150554c type:MM_FILEPAGES val:33 [ 33.418725] BUG: Bad rss-counter state mm:000000002150554c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41413' (ECDSA) to the list of known hosts. 2023/06/20 12:41:46 fuzzer started 2023/06/20 12:41:47 dialing manager at localhost:36067 2023/06/20 12:41:47 checking machine... 2023/06/20 12:41:47 checking revisions... [ 34.155778] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:41:47 testing simple program... [ 34.185991] cgroup: Unknown subsys name 'net' [ 34.217691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:41:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fc635085650 CR3=000000000fdf6000 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=2036343a31343a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a31343a3231203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007f453de37080 CR3=000000000ee50000 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=7c095e50dfb43891134a808b2c77f157 XMM02=ec2efd57dc4c00df000000000011a6d8 XMM03=cd8ea75fe324ab6f000000000011a7a8 XMM04=dea6cb190b0dfa8300000000000ae988 XMM05=19e9129bd510f2350000000000131b58 XMM06=b907173ebcbdf71800000000001309c0 XMM07=e042d86d42eb936e0000000000121f60 XMM08=cd8ea75fe324ab6f000000000011a7a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000