syzkaller login: [ 36.089237] BUG: Bad rss-counter state mm:00000000bd34e3cc type:MM_FILEPAGES val:33 [ 36.090992] BUG: Bad rss-counter state mm:00000000bd34e3cc type:MM_ANONPAGES val:22 [ 36.158751] ================================================================== [ 36.159673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.160619] Read of size 8 at addr ffff88800f286228 by task sshd/218 [ 36.161376] [ 36.161592] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.162442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.163497] Call Trace: [ 36.163815] [ 36.164145] dump_stack_lvl+0x91/0xf0 [ 36.164699] print_report+0xcc/0x620 [ 36.165157] ? __virt_addr_valid+0x102/0x340 [ 36.165687] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.166270] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.166850] kasan_report+0xbe/0xf0 [ 36.167307] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.167914] vma_interval_tree_remove+0xc75/0xec0 [ 36.168488] vma_prepare+0xc54/0x11a0 [ 36.168942] __split_vma+0x5af/0x950 [ 36.169386] ? __pfx___split_vma+0x10/0x10 [ 36.169916] ? find_held_lock+0x2c/0x110 [ 36.170495] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.171091] ? lock_is_held_type+0x9f/0x120 [ 36.171787] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.172506] ? mtree_range_walk+0x632/0x900 [ 36.173039] ? mas_walk+0x5c7/0x7c0 [ 36.173490] do_vmi_munmap+0x1f1/0x2b0 [ 36.173962] mmap_region+0x1f9/0x2660 [ 36.174422] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.175011] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.175868] ? __pfx_lock_acquire+0x10/0x10 [ 36.176493] ? __pfx_mmap_region+0x10/0x10 [ 36.177112] ? security_mmap_addr+0x7d/0xa0 [ 36.177725] ? get_unmapped_area+0x1f5/0x3f0 [ 36.178365] do_mmap+0x854/0xf00 [ 36.178881] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.179469] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.180125] ksys_mmap_pgoff+0x3af/0x500 [ 36.180718] do_syscall_64+0x3f/0x90 [ 36.181280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.182029] RIP: 0033:0x7fb7b7fcbd82 [ 36.182569] 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 [ 36.185085] RSP: 002b:00007ffc6a675f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.186143] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7b7fcbd82 [ 36.187136] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7b7405000 [ 36.188134] RBP: 00007fb7b7405000 R08: 0000000000000009 R09: 0000000000001000 [ 36.189120] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb5578a980 [ 36.190110] R13: 00007ffc6a675f70 R14: 00007ffc6a675fa0 R15: 00007ffc6a676300 [ 36.191121] [ 36.191476] [ 36.191725] Allocated by task 211: [ 36.192229] kasan_save_stack+0x22/0x50 [ 36.192816] kasan_set_track+0x25/0x30 [ 36.193395] __kasan_slab_alloc+0x59/0x70 [ 36.194007] kmem_cache_alloc+0x16b/0x370 [ 36.194611] vm_area_dup+0x20/0x160 [ 36.195141] __split_vma+0x170/0x950 [ 36.195701] split_vma+0xc6/0x110 [ 36.196218] mprotect_fixup+0x8d2/0xb30 [ 36.196805] do_mprotect_pkey+0x87e/0xd40 [ 36.197418] __x64_sys_mprotect+0x78/0xc0 [ 36.198024] do_syscall_64+0x3f/0x90 [ 36.198572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.199319] [ 36.199579] Freed by task 211: [ 36.200035] kasan_save_stack+0x22/0x50 [ 36.200622] kasan_set_track+0x25/0x30 [ 36.201201] kasan_save_free_info+0x2b/0x50 [ 36.201823] __kasan_slab_free+0x10a/0x190 [ 36.202446] kmem_cache_free+0x10d/0x4d0 [ 36.203035] rcu_core+0x8c8/0x2860 [ 36.203556] __do_softirq+0x1b7/0x7d4 [ 36.204111] [ 36.204360] Last potentially related work creation: [ 36.205042] kasan_save_stack+0x22/0x50 [ 36.205628] __kasan_record_aux_stack+0x8e/0xa0 [ 36.206302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.207049] remove_vma+0x139/0x170 [ 36.207594] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.208254] do_vmi_munmap+0x1f1/0x2b0 [ 36.208817] __vm_munmap+0x138/0x3a0 [ 36.209363] __x64_sys_munmap+0x59/0x80 [ 36.209942] do_syscall_64+0x3f/0x90 [ 36.210495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.211242] [ 36.211503] The buggy address belongs to the object at ffff88800f2861d0 [ 36.211503] which belongs to the cache vm_area_struct of size 168 [ 36.213226] The buggy address is located 88 bytes inside of [ 36.213226] freed 168-byte region [ffff88800f2861d0, ffff88800f286278) [ 36.214867] [ 36.215121] The buggy address belongs to the physical page: [ 36.215912] page:00000000732249d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf286 [ 36.217157] memcg:ffff88800ef64f01 [ 36.217652] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.218445] page_type: 0xffffffff() [ 36.218962] raw: 0100000000000200 ffff88800879fc80 ffffea0000386ac0 dead000000000003 [ 36.219970] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef64f01 [ 36.220984] page dumped because: kasan: bad access detected [ 36.221722] [ 36.221962] Memory state around the buggy address: [ 36.222613] ffff88800f286100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.223531] ffff88800f286180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.224436] >ffff88800f286200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.225330] ^ [ 36.225887] ffff88800f286280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.226693] ffff88800f286300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.227680] ================================================================== [ 36.228817] Disabling lock debugging due to kernel taint [ 38.325815] BUG: Bad rss-counter state mm:00000000b0471635 type:MM_FILEPAGES val:33 [ 38.326844] BUG: Bad rss-counter state mm:00000000b0471635 type:MM_ANONPAGES val:22 [ 38.705107] BUG: Bad rss-counter state mm:00000000b4db136e type:MM_FILEPAGES val:33 [ 38.706101] BUG: Bad rss-counter state mm:00000000b4db136e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26785' (ECDSA) to the list of known hosts. 2023/06/19 19:33:04 fuzzer started 2023/06/19 19:33:04 dialing manager at localhost:44161 2023/06/19 19:33:04 checking machine... 2023/06/19 19:33:04 checking revisions... [ 39.426431] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:33:05 testing simple program... [ 39.473228] cgroup: Unknown subsys name 'net' [ 39.513414] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:32:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016c7fdc8 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff888016c7fda0 RDI=ffff88806ce09aa8 RBP=ffff888016c78000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000091967 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888016c7fda0 R15=ffff88806ce09a98 RIP=ffffffff81131cac 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 00007ff4f54fe900 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=00007ffe7c6df000 CR3=000000000c68e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2cc36bdd00 CR3=0000000010002000 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=2034303a33333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000