syzkaller login: [ 31.032523] BUG: Bad rss-counter state mm:00000000804d04da type:MM_FILEPAGES val:33 [ 31.033762] BUG: Bad rss-counter state mm:00000000804d04da type:MM_ANONPAGES val:22 [ 31.190795] ================================================================== [ 31.191725] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.192679] Read of size 8 at addr ffff888016fe8058 by task sshd/220 [ 31.193580] [ 31.193796] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.194683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.195669] Call Trace: [ 31.195983] [ 31.196265] dump_stack_lvl+0x91/0xf0 [ 31.196776] print_report+0xcc/0x620 [ 31.197257] ? __virt_addr_valid+0x102/0x340 [ 31.197817] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.198443] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.199065] kasan_report+0xbe/0xf0 [ 31.199557] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200171] vma_interval_tree_remove+0xc75/0xec0 [ 31.200790] vma_prepare+0xc54/0x11a0 [ 31.201265] __split_vma+0x5af/0x950 [ 31.201758] ? __pfx___split_vma+0x10/0x10 [ 31.202317] ? find_held_lock+0x2c/0x110 [ 31.202846] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.203407] ? lock_is_held_type+0x9f/0x120 [ 31.203988] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.204702] ? mtree_range_walk+0x632/0x900 [ 31.205329] ? mas_walk+0x5c7/0x7c0 [ 31.205893] do_vmi_munmap+0x1f1/0x2b0 [ 31.206472] mmap_region+0x1f9/0x2660 [ 31.207022] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.207628] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.208433] ? __pfx_lock_acquire+0x10/0x10 [ 31.209069] ? __pfx_mmap_region+0x10/0x10 [ 31.209689] ? security_mmap_addr+0x7d/0xa0 [ 31.210308] ? get_unmapped_area+0x1f5/0x3f0 [ 31.210966] do_mmap+0x854/0xf00 [ 31.211464] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.212031] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.212671] ksys_mmap_pgoff+0x3af/0x500 [ 31.213182] do_syscall_64+0x3f/0x90 [ 31.213680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214389] RIP: 0033:0x7fe9b3e9dd82 [ 31.214857] 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 [ 31.216995] RSP: 002b:00007ffe4a4ddf48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.217907] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9b3e9dd82 [ 31.218775] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9b32d7000 [ 31.219629] RBP: 00007fe9b32d7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.220487] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558131ee4ec0 [ 31.221352] R13: 00007ffe4a4ddf60 R14: 00007ffe4a4ddf90 R15: 00007ffe4a4de2f0 [ 31.222249] [ 31.222566] [ 31.222780] Allocated by task 213: [ 31.223215] kasan_save_stack+0x22/0x50 [ 31.223732] kasan_set_track+0x25/0x30 [ 31.224222] __kasan_slab_alloc+0x59/0x70 [ 31.224766] kmem_cache_alloc+0x16b/0x370 [ 31.225284] vm_area_dup+0x20/0x160 [ 31.225748] __split_vma+0x170/0x950 [ 31.226224] split_vma+0xc6/0x110 [ 31.226670] mprotect_fixup+0x8d2/0xb30 [ 31.227176] do_mprotect_pkey+0x87e/0xd40 [ 31.227716] __x64_sys_mprotect+0x78/0xc0 [ 31.228247] do_syscall_64+0x3f/0x90 [ 31.228749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.229392] [ 31.229622] Freed by task 213: [ 31.230039] kasan_save_stack+0x22/0x50 [ 31.230560] kasan_set_track+0x25/0x30 [ 31.231060] kasan_save_free_info+0x2b/0x50 [ 31.231605] __kasan_slab_free+0x10a/0x190 [ 31.232140] kmem_cache_free+0x10d/0x4d0 [ 31.232677] rcu_core+0x8c8/0x2860 [ 31.233125] __do_softirq+0x1b7/0x7d4 [ 31.233622] [ 31.233840] Last potentially related work creation: [ 31.234435] kasan_save_stack+0x22/0x50 [ 31.235030] __kasan_record_aux_stack+0x8e/0xa0 [ 31.235616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.236265] remove_vma+0x139/0x170 [ 31.236734] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.237297] do_vmi_munmap+0x1f1/0x2b0 [ 31.237812] __vm_munmap+0x138/0x3a0 [ 31.238309] __x64_sys_munmap+0x59/0x80 [ 31.238823] do_syscall_64+0x3f/0x90 [ 31.239300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.239963] [ 31.240180] The buggy address belongs to the object at ffff888016fe8000 [ 31.240180] which belongs to the cache vm_area_struct of size 168 [ 31.241678] The buggy address is located 88 bytes inside of [ 31.241678] freed 168-byte region [ffff888016fe8000, ffff888016fe80a8) [ 31.243104] [ 31.243319] The buggy address belongs to the physical page: [ 31.243983] page:0000000094bc2965 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fe8 [ 31.245089] memcg:ffff888009679001 [ 31.245540] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.246201] page_type: 0xffffffff() [ 31.246667] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.247592] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009679001 [ 31.248504] page dumped because: kasan: bad access detected [ 31.249160] [ 31.249373] Memory state around the buggy address: [ 31.250001] ffff888016fe7f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.250863] ffff888016fe7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 31.251722] >ffff888016fe8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.252587] ^ [ 31.253302] ffff888016fe8080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.254200] ffff888016fe8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.255057] ================================================================== [ 31.256139] Disabling lock debugging due to kernel taint [ 32.961219] BUG: Bad rss-counter state mm:00000000b0406c36 type:MM_FILEPAGES val:33 [ 32.963137] BUG: Bad rss-counter state mm:00000000b0406c36 type:MM_ANONPAGES val:22 [ 33.556337] BUG: Bad rss-counter state mm:00000000d618c74d type:MM_FILEPAGES val:33 [ 33.557557] BUG: Bad rss-counter state mm:00000000d618c74d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59960' (ECDSA) to the list of known hosts. 2023/06/20 13:26:54 fuzzer started 2023/06/20 13:26:54 dialing manager at localhost:36067 2023/06/20 13:26:54 checking machine... 2023/06/20 13:26:54 checking revisions... [ 34.169268] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:26:55 testing simple program... [ 34.217006] cgroup: Unknown subsys name 'net' [ 34.255997] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:26:54 Registers: info registers vcpu 0 RAX=1ffff1100129ff69 RBX=ffff8880094ffb18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880094ffb48 RBP=ffff88800fb50a20 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800fb3d200 R14=ffffffff813782f8 R15=ffff88800fb3d208 RIP=ffffffff818464e2 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 00007f6611221900 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=00007ffc95ff8000 CR3=000000000fbf6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f7932d2bde0 CR3=000000000f8cc000 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=2034353a36323a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a36323a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000