syzkaller login: [ 49.966883] BUG: Bad rss-counter state mm:00000000d2ceda31 type:MM_FILEPAGES val:33 [ 49.972136] BUG: Bad rss-counter state mm:00000000d2ceda31 type:MM_ANONPAGES val:22 [ 50.139474] ================================================================== [ 50.140020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.140570] Read of size 8 at addr ffff88800cb81968 by task sshd/224 [ 50.141009] [ 50.141130] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.141622] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.142180] Call Trace: [ 50.142364] [ 50.142534] dump_stack_lvl+0x91/0xf0 [ 50.142824] print_report+0xcc/0x620 [ 50.143096] ? __virt_addr_valid+0x102/0x340 [ 50.143440] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.143801] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.144146] kasan_report+0xbe/0xf0 [ 50.144427] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.144788] vma_interval_tree_remove+0xc75/0xec0 [ 50.145133] vma_prepare+0xc54/0x11a0 [ 50.145407] __split_vma+0x5af/0x950 [ 50.145682] ? __pfx___split_vma+0x10/0x10 [ 50.145988] ? find_held_lock+0x2c/0x110 [ 50.146290] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.146610] ? lock_is_held_type+0x9f/0x120 [ 50.146923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.147270] ? mtree_range_walk+0x632/0x900 [ 50.155495] ? mas_walk+0x5c7/0x7c0 [ 50.155799] do_vmi_munmap+0x1f1/0x2b0 [ 50.156078] mmap_region+0x1f9/0x2660 [ 50.156362] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.156664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.157074] ? __pfx_lock_acquire+0x10/0x10 [ 50.157386] ? __pfx_mmap_region+0x10/0x10 [ 50.157684] ? security_mmap_addr+0x7d/0xa0 [ 50.157996] ? get_unmapped_area+0x1f5/0x3f0 [ 50.158312] do_mmap+0x854/0xf00 [ 50.158573] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.158853] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.159175] ksys_mmap_pgoff+0x3af/0x500 [ 50.159504] do_syscall_64+0x3f/0x90 [ 50.159787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.160162] RIP: 0033:0x7feae86a9d82 [ 50.160422] 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 [ 50.161649] RSP: 002b:00007fff7a5c9cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.162165] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feae86a9d82 [ 50.162647] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feae7ae3000 [ 50.163132] RBP: 00007feae7ae3000 R08: 0000000000000009 R09: 0000000000001000 [ 50.163658] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578cbde6ec0 [ 50.164139] R13: 00007fff7a5c9cf0 R14: 00007fff7a5c9d20 R15: 00007fff7a5ca080 [ 50.164626] [ 50.164793] [ 50.164925] Allocated by task 215: [ 50.165162] kasan_save_stack+0x22/0x50 [ 50.165458] kasan_set_track+0x25/0x30 [ 50.165743] __kasan_slab_alloc+0x59/0x70 [ 50.166039] kmem_cache_alloc+0x16b/0x370 [ 50.166326] vm_area_dup+0x20/0x160 [ 50.166597] __split_vma+0x170/0x950 [ 50.166856] split_vma+0xc6/0x110 [ 50.167116] mprotect_fixup+0x8d2/0xb30 [ 50.167411] do_mprotect_pkey+0x87e/0xd40 [ 50.167715] __x64_sys_mprotect+0x78/0xc0 [ 50.168018] do_syscall_64+0x3f/0x90 [ 50.168285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.168652] [ 50.168775] Freed by task 215: [ 50.168997] kasan_save_stack+0x22/0x50 [ 50.169287] kasan_set_track+0x25/0x30 [ 50.169577] kasan_save_free_info+0x2b/0x50 [ 50.169879] __kasan_slab_free+0x10a/0x190 [ 50.170184] kmem_cache_free+0x10d/0x4d0 [ 50.170479] rcu_core+0x8c8/0x2860 [ 50.170736] __do_softirq+0x1b7/0x7d4 [ 50.171012] [ 50.171138] Last potentially related work creation: [ 50.171509] kasan_save_stack+0x22/0x50 [ 50.171804] __kasan_record_aux_stack+0x8e/0xa0 [ 50.172135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.172507] remove_vma+0x139/0x170 [ 50.172773] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.173080] do_vmi_munmap+0x1f1/0x2b0 [ 50.173364] __vm_munmap+0x138/0x3a0 [ 50.173637] __x64_sys_munmap+0x59/0x80 [ 50.173919] do_syscall_64+0x3f/0x90 [ 50.174196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.174565] [ 50.174686] The buggy address belongs to the object at ffff88800cb81910 [ 50.174686] which belongs to the cache vm_area_struct of size 168 [ 50.175571] The buggy address is located 88 bytes inside of [ 50.175571] freed 168-byte region [ffff88800cb81910, ffff88800cb819b8) [ 50.176367] [ 50.176498] The buggy address belongs to the physical page: [ 50.176882] page:0000000096d1069d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb81 [ 50.177493] memcg:ffff88800c76aa01 [ 50.177747] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 50.178147] page_type: 0xffffffff() [ 50.178402] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 50.178933] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c76aa01 [ 50.179475] page dumped because: kasan: bad access detected [ 50.179844] [ 50.179962] Memory state around the buggy address: [ 50.180298] ffff88800cb81800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 50.180782] ffff88800cb81880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 50.181267] >ffff88800cb81900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.181750] ^ [ 50.182196] ffff88800cb81980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 50.182685] ffff88800cb81a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.183185] ================================================================== [ 50.184011] Disabling lock debugging due to kernel taint [ 55.871582] BUG: Bad rss-counter state mm:00000000c213904d type:MM_FILEPAGES val:33 [ 55.872932] BUG: Bad rss-counter state mm:00000000c213904d type:MM_ANONPAGES val:22 [ 57.499783] BUG: Bad rss-counter state mm:0000000076519dbd type:MM_FILEPAGES val:33 [ 57.501091] BUG: Bad rss-counter state mm:0000000076519dbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55292' (ECDSA) to the list of known hosts. 2023/06/20 10:23:34 fuzzer started 2023/06/20 10:23:35 dialing manager at localhost:44161 2023/06/20 10:23:35 checking machine... 2023/06/20 10:23:35 checking revisions... [ 58.459033] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:23:35 testing simple program... [ 58.519248] cgroup: Unknown subsys name 'net' [ 58.567630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:23:23 Registers: info registers vcpu 0 RAX=ffff888009537ef8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888009537e01 RSI=ffff888009537e00 RDI=ffff888009537e00 RBP=ffff8880095375a0 RSP=ffff8880095374d0 R8 =0000000000000001 R9 =ffff888009537588 R10=0000000000038001 R11=0000000000023118 R12=ffff8880095375a8 R13=ffff888009537590 R14=ffff888009537e00 R15=ffff888009537548 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 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=00007f9498f0a6f8 CR3=000000000cc3a000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=ffffed1001910081 RSI=0000000000000004 RDI=ffff88800c880400 RBP=ffff88800c880400 RSP=ffff8880101ff7a8 R8 =0000000000000000 R9 =ffffed1001910080 R10=ffff88800c880403 R11=0000000000000000 R12=0000000000000003 R13=ffffed1001910080 R14=0000000000000001 R15=1ffff1100203fef6 RIP=ffffffff845308c8 RFL=00000002 [-------] 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=00007f4e02e5d8c0 CR3=000000000d6d8000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=4e17699e593135f60000000000136248 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=6648cf5be71be7a100000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000