syzkaller login: [ 31.068283] BUG: Bad rss-counter state mm:000000001f4f0d3c type:MM_FILEPAGES val:33 [ 31.069788] BUG: Bad rss-counter state mm:000000001f4f0d3c type:MM_ANONPAGES val:22 [ 31.117731] ================================================================== [ 31.118649] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.119619] Read of size 8 at addr ffff88801abda798 by task sshd/220 [ 31.120389] [ 31.120612] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.121478] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.122489] Call Trace: [ 31.122809] [ 31.123094] dump_stack_lvl+0x91/0xf0 [ 31.123584] print_report+0xcc/0x620 [ 31.124068] ? __virt_addr_valid+0x102/0x340 [ 31.124616] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.125240] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.125868] kasan_report+0xbe/0xf0 [ 31.126362] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.126992] vma_interval_tree_remove+0xc75/0xec0 [ 31.127590] vma_prepare+0xc54/0x11a0 [ 31.128068] __split_vma+0x5af/0x950 [ 31.128538] ? __pfx___split_vma+0x10/0x10 [ 31.129064] ? find_held_lock+0x2c/0x110 [ 31.129583] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.130180] ? lock_is_held_type+0x9f/0x120 [ 31.130717] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.131321] ? mtree_range_walk+0x632/0x900 [ 31.131882] ? mas_walk+0x5c7/0x7c0 [ 31.132359] do_vmi_munmap+0x1f1/0x2b0 [ 31.132851] mmap_region+0x1f9/0x2660 [ 31.133333] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.133851] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.134566] ? __pfx_lock_acquire+0x10/0x10 [ 31.135101] ? __pfx_mmap_region+0x10/0x10 [ 31.135636] ? security_mmap_addr+0x7d/0xa0 [ 31.136175] ? get_unmapped_area+0x1f5/0x3f0 [ 31.136724] do_mmap+0x854/0xf00 [ 31.137176] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.137677] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.138238] ksys_mmap_pgoff+0x3af/0x500 [ 31.138740] do_syscall_64+0x3f/0x90 [ 31.139231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.139885] RIP: 0033:0x7fc36224bd82 [ 31.140345] 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 [ 31.142470] RSP: 002b:00007ffe106d8878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.143370] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc36224bd82 [ 31.144227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc361685000 [ 31.145071] RBP: 00007fc361685000 R08: 0000000000000009 R09: 0000000000001000 [ 31.145940] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580125f9ec0 [ 31.146784] R13: 00007ffe106d8890 R14: 00007ffe106d88c0 R15: 00007ffe106d8c20 [ 31.147653] [ 31.147952] [ 31.148167] Allocated by task 213: [ 31.148595] kasan_save_stack+0x22/0x50 [ 31.149112] kasan_set_track+0x25/0x30 [ 31.149636] __kasan_slab_alloc+0x59/0x70 [ 31.150161] kmem_cache_alloc+0x16b/0x370 [ 31.150681] vm_area_dup+0x20/0x160 [ 31.151151] __split_vma+0x170/0x950 [ 31.151626] split_vma+0xc6/0x110 [ 31.152073] mprotect_fixup+0x8d2/0xb30 [ 31.152589] do_mprotect_pkey+0x87e/0xd40 [ 31.153121] __x64_sys_mprotect+0x78/0xc0 [ 31.153663] do_syscall_64+0x3f/0x90 [ 31.154142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.154790] [ 31.155006] Freed by task 213: [ 31.155402] kasan_save_stack+0x22/0x50 [ 31.155906] kasan_set_track+0x25/0x30 [ 31.156399] kasan_save_free_info+0x2b/0x50 [ 31.156935] __kasan_slab_free+0x10a/0x190 [ 31.157466] kmem_cache_free+0x10d/0x4d0 [ 31.157990] rcu_core+0x8c8/0x2860 [ 31.158435] __do_softirq+0x1b7/0x7d4 [ 31.158923] [ 31.159146] Last potentially related work creation: [ 31.159729] kasan_save_stack+0x22/0x50 [ 31.160228] __kasan_record_aux_stack+0x8e/0xa0 [ 31.160799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.161437] remove_vma+0x139/0x170 [ 31.161912] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.162465] do_vmi_munmap+0x1f1/0x2b0 [ 31.162955] __vm_munmap+0x138/0x3a0 [ 31.163429] __x64_sys_munmap+0x59/0x80 [ 31.163926] do_syscall_64+0x3f/0x90 [ 31.164400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.165046] [ 31.165259] The buggy address belongs to the object at ffff88801abda740 [ 31.165259] which belongs to the cache vm_area_struct of size 168 [ 31.166721] The buggy address is located 88 bytes inside of [ 31.166721] freed 168-byte region [ffff88801abda740, ffff88801abda7e8) [ 31.168121] [ 31.168343] The buggy address belongs to the physical page: [ 31.169012] page:0000000079325611 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1abda [ 31.170142] memcg:ffff888019672701 [ 31.170568] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.171221] page_type: 0xffffffff() [ 31.171669] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.172595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019672701 [ 31.173511] page dumped because: kasan: bad access detected [ 31.174188] [ 31.174406] Memory state around the buggy address: [ 31.174985] ffff88801abda680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.175852] ffff88801abda700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.176710] >ffff88801abda780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.177563] ^ [ 31.178064] ffff88801abda800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.178911] ffff88801abda880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.179755] ================================================================== [ 31.181061] Disabling lock debugging due to kernel taint [ 33.832901] BUG: Bad rss-counter state mm:000000001baadec2 type:MM_FILEPAGES val:33 [ 33.834609] BUG: Bad rss-counter state mm:000000001baadec2 type:MM_ANONPAGES val:22 [ 34.295913] BUG: Bad rss-counter state mm:00000000208ed1b8 type:MM_FILEPAGES val:33 [ 34.296987] BUG: Bad rss-counter state mm:00000000208ed1b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56843' (ECDSA) to the list of known hosts. 2023/06/20 19:45:23 fuzzer started 2023/06/20 19:45:24 dialing manager at localhost:36067 2023/06/20 19:45:24 checking machine... 2023/06/20 19:45:24 checking revisions... [ 35.023008] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:45:24 testing simple program... [ 35.074218] cgroup: Unknown subsys name 'net' [ 35.131258] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:45:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86138eb4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000005 R15=ffff88806ce09a98 RIP=ffffffff81130b1f RFL=00000297 [--S-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 00007fb504185900 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=00007fb50473c618 CR3=000000000fbee000 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=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=00007f3d41004190 CR3=000000000ca20000 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=39661b27cf4984842b472866331ce991 XMM02=000000000011d700eff9b2d0a8fce9cb XMM03=000000000011d7d02c67c8bc2e329bc3 XMM04=2c95c2df85760ffe00000000000ae988 XMM05=19e9129bd510f2350000000000131bc0 XMM06=8c27abf8d6626fcb0000000000130a28 XMM07=e042d86d42eb936e0000000000122080 XMM08=3bab3486a8b7a01c000000000011d7d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000