syzkaller login: [ 23.971372] BUG: Bad rss-counter state mm:00000000605e66e7 type:MM_FILEPAGES val:33 [ 23.972496] BUG: Bad rss-counter state mm:00000000605e66e7 type:MM_ANONPAGES val:22 [ 24.144024] ================================================================== [ 24.144990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.145991] Read of size 8 at addr ffff8880141aec20 by task sshd/220 [ 24.146816] [ 24.147150] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.148073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.149124] Call Trace: [ 24.149460] [ 24.149759] dump_stack_lvl+0x91/0xf0 [ 24.150281] print_report+0xcc/0x620 [ 24.150807] ? __virt_addr_valid+0x102/0x340 [ 24.151393] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.152043] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.152701] kasan_report+0xbe/0xf0 [ 24.153201] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.153853] vma_interval_tree_remove+0xc75/0xec0 [ 24.154505] vma_prepare+0xc54/0x11a0 [ 24.155030] __split_vma+0x5af/0x950 [ 24.155546] ? __pfx___split_vma+0x10/0x10 [ 24.156120] ? find_held_lock+0x2c/0x110 [ 24.156692] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.157301] ? lock_is_held_type+0x9f/0x120 [ 24.157892] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.158552] ? mtree_range_walk+0x632/0x900 [ 24.159181] ? mas_walk+0x5c7/0x7c0 [ 24.159702] do_vmi_munmap+0x1f1/0x2b0 [ 24.160242] mmap_region+0x1f9/0x2660 [ 24.160765] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.161321] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.162099] ? __pfx_lock_acquire+0x10/0x10 [ 24.162698] ? __pfx_mmap_region+0x10/0x10 [ 24.163285] ? security_mmap_addr+0x7d/0xa0 [ 24.163863] ? get_unmapped_area+0x1f5/0x3f0 [ 24.164461] do_mmap+0x854/0xf00 [ 24.164939] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.165480] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.166090] ksys_mmap_pgoff+0x3af/0x500 [ 24.166670] do_syscall_64+0x3f/0x90 [ 24.167198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.167901] RIP: 0033:0x7f69c24a2d82 [ 24.168405] 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 [ 24.170756] RSP: 002b:00007ffc337b44a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.171747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69c24a2d82 [ 24.172677] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69c18dc000 [ 24.173612] RBP: 00007f69c18dc000 R08: 0000000000000009 R09: 0000000000001000 [ 24.174540] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643d6cfdec0 [ 24.175488] R13: 00007ffc337b44c0 R14: 00007ffc337b44f0 R15: 00007ffc337b4850 [ 24.176428] [ 24.176747] [ 24.176979] Allocated by task 213: [ 24.177447] kasan_save_stack+0x22/0x50 [ 24.177996] kasan_set_track+0x25/0x30 [ 24.178520] __kasan_slab_alloc+0x59/0x70 [ 24.179102] kmem_cache_alloc+0x16b/0x370 [ 24.179647] vm_area_dup+0x20/0x160 [ 24.180132] __split_vma+0x170/0x950 [ 24.180623] split_vma+0xc6/0x110 [ 24.181093] mprotect_fixup+0x8d2/0xb30 [ 24.181626] do_mprotect_pkey+0x87e/0xd40 [ 24.182180] __x64_sys_mprotect+0x78/0xc0 [ 24.182744] do_syscall_64+0x3f/0x90 [ 24.183247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.183925] [ 24.184161] Freed by task 213: [ 24.184579] kasan_save_stack+0x22/0x50 [ 24.185111] kasan_set_track+0x25/0x30 [ 24.185641] kasan_save_free_info+0x2b/0x50 [ 24.186221] __kasan_slab_free+0x10a/0x190 [ 24.186830] kmem_cache_free+0x10d/0x4d0 [ 24.187388] rcu_core+0x8c8/0x2860 [ 24.187873] __do_softirq+0x1b7/0x7d4 [ 24.188395] [ 24.188628] Last potentially related work creation: [ 24.189265] kasan_save_stack+0x22/0x50 [ 24.189807] __kasan_record_aux_stack+0x8e/0xa0 [ 24.190433] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.191156] remove_vma+0x139/0x170 [ 24.191647] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.192254] do_vmi_munmap+0x1f1/0x2b0 [ 24.192791] __vm_munmap+0x138/0x3a0 [ 24.193299] __x64_sys_munmap+0x59/0x80 [ 24.193840] do_syscall_64+0x3f/0x90 [ 24.194366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.195078] [ 24.195311] The buggy address belongs to the object at ffff8880141aebc8 [ 24.195311] which belongs to the cache vm_area_struct of size 168 [ 24.196911] The buggy address is located 88 bytes inside of [ 24.196911] freed 168-byte region [ffff8880141aebc8, ffff8880141aec70) [ 24.198440] [ 24.198681] The buggy address belongs to the physical page: [ 24.199399] page:000000003cfd15e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x141ae [ 24.200595] memcg:ffff88800e278a01 [ 24.201063] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.201823] page_type: 0xffffffff() [ 24.202314] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a5fc0 dead000000000007 [ 24.203354] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e278a01 [ 24.204339] page dumped because: kasan: bad access detected [ 24.205060] [ 24.205292] Memory state around the buggy address: [ 24.205927] ffff8880141aeb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.206875] ffff8880141aeb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.207805] >ffff8880141aec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.208739] ^ [ 24.209315] ffff8880141aec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.210240] ffff8880141aed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.211174] ================================================================== [ 24.212237] Disabling lock debugging due to kernel taint [ 26.461025] BUG: Bad rss-counter state mm:00000000e4fdabcb type:MM_FILEPAGES val:33 [ 26.462345] BUG: Bad rss-counter state mm:00000000e4fdabcb type:MM_ANONPAGES val:22 [ 27.543074] BUG: Bad rss-counter state mm:00000000e1f77acc type:MM_FILEPAGES val:33 [ 27.544110] BUG: Bad rss-counter state mm:00000000e1f77acc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22179' (ECDSA) to the list of known hosts. 2023/06/21 08:24:16 fuzzer started 2023/06/21 08:24:16 dialing manager at localhost:36067 2023/06/21 08:24:16 checking machine... 2023/06/21 08:24:16 checking revisions... [ 28.120132] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:24:16 testing simple program... [ 28.163416] cgroup: Unknown subsys name 'net' [ 28.219514] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:24:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83636298 RDI=0000000000000007 RBP=ffff88801994fe60 RSP=ffff88801994fb50 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000014 R13=0000000000000000 R14=0000000000000000 R15=ffff88801994fea4 RIP=ffffffff836362ad 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 00007f1b83899900 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=00007f1b83e50618 CR3=000000000f582000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008df7e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011befd3 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=00007fd6c30ba400 CR3=000000000ca34000 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=b60c094821d917b5294e9cd1c848d5d0 XMM02=000000000011b300eff9b2d0a8fce9cb XMM03=000000000011b3d02c67c8bc2e329bc3 XMM04=c5f0f840bd135a2100000000000ae988 XMM05=2c8ad9733449414a0000000000132630 XMM06=00c3ffa147b8d8570000000000131318 XMM07=e042d86d42eb936e0000000000121930 XMM08=30b275c9b9e8c371000000000011b3d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000