syzkaller login: [ 29.064344] BUG: Bad rss-counter state mm:00000000e845ba9a type:MM_FILEPAGES val:33 [ 29.065713] BUG: Bad rss-counter state mm:00000000e845ba9a type:MM_ANONPAGES val:22 [ 29.186273] ================================================================== [ 29.187171] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.188105] Read of size 8 at addr ffff888008da8310 by task sshd/219 [ 29.188867] [ 29.189083] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.190038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.191007] Call Trace: [ 29.191327] [ 29.191634] dump_stack_lvl+0x91/0xf0 [ 29.192126] print_report+0xcc/0x620 [ 29.192618] ? __virt_addr_valid+0x102/0x340 [ 29.193173] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.193815] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.194431] kasan_report+0xbe/0xf0 [ 29.194907] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.195525] vma_interval_tree_remove+0xc75/0xec0 [ 29.196128] vma_prepare+0xc54/0x11a0 [ 29.196605] __split_vma+0x5af/0x950 [ 29.197074] ? __pfx___split_vma+0x10/0x10 [ 29.197617] ? find_held_lock+0x2c/0x110 [ 29.198138] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.198697] ? lock_is_held_type+0x9f/0x120 [ 29.199234] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.199841] ? mtree_range_walk+0x632/0x900 [ 29.200388] ? mas_walk+0x5c7/0x7c0 [ 29.200856] do_vmi_munmap+0x1f1/0x2b0 [ 29.201347] mmap_region+0x1f9/0x2660 [ 29.201853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.202363] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.203074] ? __pfx_lock_acquire+0x10/0x10 [ 29.203606] ? __pfx_mmap_region+0x10/0x10 [ 29.204134] ? security_mmap_addr+0x7d/0xa0 [ 29.204659] ? get_unmapped_area+0x1f5/0x3f0 [ 29.205207] do_mmap+0x854/0xf00 [ 29.205669] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.206161] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.206730] ksys_mmap_pgoff+0x3af/0x500 [ 29.207236] do_syscall_64+0x3f/0x90 [ 29.207725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.208369] RIP: 0033:0x7f3df4904d82 [ 29.208827] 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 [ 29.210958] RSP: 002b:00007fff346d1d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.211860] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3df4904d82 [ 29.212700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3df3d3e000 [ 29.213555] RBP: 00007f3df3d3e000 R08: 0000000000000009 R09: 0000000000001000 [ 29.214418] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d685c3d90 [ 29.215274] R13: 00007fff346d1d80 R14: 00007fff346d1db0 R15: 00007fff346d2110 [ 29.216128] [ 29.216423] [ 29.216637] Allocated by task 211: [ 29.217067] kasan_save_stack+0x22/0x50 [ 29.217582] kasan_set_track+0x25/0x30 [ 29.218078] __kasan_slab_alloc+0x59/0x70 [ 29.218598] kmem_cache_alloc+0x16b/0x370 [ 29.219114] vm_area_dup+0x20/0x160 [ 29.219568] __split_vma+0x170/0x950 [ 29.220039] split_vma+0xc6/0x110 [ 29.220477] mprotect_fixup+0x8d2/0xb30 [ 29.220977] do_mprotect_pkey+0x87e/0xd40 [ 29.221496] __x64_sys_mprotect+0x78/0xc0 [ 29.222039] do_syscall_64+0x3f/0x90 [ 29.222512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.223149] [ 29.223363] Freed by task 211: [ 29.223750] kasan_save_stack+0x22/0x50 [ 29.224250] kasan_set_track+0x25/0x30 [ 29.224738] kasan_save_free_info+0x2b/0x50 [ 29.225272] __kasan_slab_free+0x10a/0x190 [ 29.225812] kmem_cache_free+0x10d/0x4d0 [ 29.226319] rcu_core+0x8c8/0x2860 [ 29.226759] __do_softirq+0x1b7/0x7d4 [ 29.227234] [ 29.227450] Last potentially related work creation: [ 29.228033] kasan_save_stack+0x22/0x50 [ 29.228539] __kasan_record_aux_stack+0x8e/0xa0 [ 29.229114] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.229784] remove_vma+0x139/0x170 [ 29.230237] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.230797] do_vmi_munmap+0x1f1/0x2b0 [ 29.231407] __vm_munmap+0x138/0x3a0 [ 29.232030] __x64_sys_munmap+0x59/0x80 [ 29.232640] do_syscall_64+0x3f/0x90 [ 29.233126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.233799] [ 29.234017] The buggy address belongs to the object at ffff888008da82b8 [ 29.234017] which belongs to the cache vm_area_struct of size 168 [ 29.235492] The buggy address is located 88 bytes inside of [ 29.235492] freed 168-byte region [ffff888008da82b8, ffff888008da8360) [ 29.236904] [ 29.237125] The buggy address belongs to the physical page: [ 29.237816] page:00000000686788ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8da8 [ 29.238903] memcg:ffff888008da9001 [ 29.239329] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.239972] page_type: 0xffffffff() [ 29.240425] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.241344] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008da9001 [ 29.242259] page dumped because: kasan: bad access detected [ 29.242921] [ 29.243137] Memory state around the buggy address: [ 29.243717] ffff888008da8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 29.244571] ffff888008da8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.245427] >ffff888008da8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.246294] ^ [ 29.246757] ffff888008da8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.247607] ffff888008da8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.248454] ================================================================== [ 29.249749] Disabling lock debugging due to kernel taint [ 31.210043] BUG: Bad rss-counter state mm:00000000cebecd23 type:MM_FILEPAGES val:33 [ 31.211164] BUG: Bad rss-counter state mm:00000000cebecd23 type:MM_ANONPAGES val:22 [ 31.807203] BUG: Bad rss-counter state mm:00000000365bac4f type:MM_FILEPAGES val:33 [ 31.808378] BUG: Bad rss-counter state mm:00000000365bac4f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32316' (ECDSA) to the list of known hosts. 2023/06/19 14:02:02 fuzzer started 2023/06/19 14:02:02 dialing manager at localhost:44161 2023/06/19 14:02:02 checking machine... 2023/06/19 14:02:02 checking revisions... [ 32.462524] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:02:02 testing simple program... [ 32.512216] cgroup: Unknown subsys name 'net' [ 32.556454] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:02:01 Registers: info registers vcpu 0 RAX=1ffff11001931d8f RBX=ffff88800c98ec48 RCX=1ffff11001725ad2 RDX=dffffc0000000000 RSI=ffff88800f3c2000 RDI=ffff88800c98ec78 RBP=ffff88800f402c58 RSP=ffff8880169f7638 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800f3c0000 R13=0000000000000000 R14=ffff88800e69b2a8 R15=ffff88800e69b260 RIP=ffffffff818474fe RFL=00000046 [---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 00007f8a1b141900 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=00007f5af804e020 CR3=0000000016646000 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=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=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=00007f8a1b6f8618 CR3=0000000016fca000 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=32303a3431203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383330 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000