syzkaller login: [ 31.324805] BUG: Bad rss-counter state mm:0000000065ac5c73 type:MM_FILEPAGES val:33 [ 31.325967] BUG: Bad rss-counter state mm:0000000065ac5c73 type:MM_ANONPAGES val:22 [ 31.521310] ================================================================== [ 31.522343] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.523489] Read of size 8 at addr ffff88801a4fb140 by task sshd/221 [ 31.524368] [ 31.524579] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.525399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.526329] Call Trace: [ 31.526630] [ 31.526897] dump_stack_lvl+0x91/0xf0 [ 31.527359] print_report+0xcc/0x620 [ 31.527811] ? __virt_addr_valid+0x102/0x340 [ 31.528334] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.528916] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.529527] kasan_report+0xbe/0xf0 [ 31.529980] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.530573] vma_interval_tree_remove+0xc75/0xec0 [ 31.531153] vma_prepare+0xc54/0x11a0 [ 31.531613] __split_vma+0x5af/0x950 [ 31.532072] ? __pfx___split_vma+0x10/0x10 [ 31.532570] ? find_held_lock+0x2c/0x110 [ 31.533065] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.533628] ? lock_is_held_type+0x9f/0x120 [ 31.534186] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.534819] ? mtree_range_walk+0x632/0x900 [ 31.535391] ? mas_walk+0x5c7/0x7c0 [ 31.535880] do_vmi_munmap+0x1f1/0x2b0 [ 31.536388] mmap_region+0x1f9/0x2660 [ 31.536881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.537424] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.538162] ? __pfx_lock_acquire+0x10/0x10 [ 31.538713] ? __pfx_mmap_region+0x10/0x10 [ 31.539252] ? security_mmap_addr+0x7d/0xa0 [ 31.539790] ? get_unmapped_area+0x1f5/0x3f0 [ 31.540343] do_mmap+0x854/0xf00 [ 31.540783] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.541333] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.541911] ksys_mmap_pgoff+0x3af/0x500 [ 31.542425] do_syscall_64+0x3f/0x90 [ 31.542919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.543578] RIP: 0033:0x7fdb3f403d82 [ 31.544040] 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 [ 31.546196] RSP: 002b:00007fff02e82108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.547110] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb3f403d82 [ 31.547968] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb3e83d000 [ 31.548814] RBP: 00007fdb3e83d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.549698] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d78c544b20 [ 31.550552] R13: 00007fff02e82120 R14: 00007fff02e82150 R15: 00007fff02e824b0 [ 31.551429] [ 31.551721] [ 31.551943] Allocated by task 214: [ 31.552371] kasan_save_stack+0x22/0x50 [ 31.552877] kasan_set_track+0x25/0x30 [ 31.553388] __kasan_slab_alloc+0x59/0x70 [ 31.553914] kmem_cache_alloc+0x16b/0x370 [ 31.554437] vm_area_dup+0x20/0x160 [ 31.554890] __split_vma+0x170/0x950 [ 31.555353] split_vma+0xc6/0x110 [ 31.555796] mprotect_fixup+0x8d2/0xb30 [ 31.556300] do_mprotect_pkey+0x87e/0xd40 [ 31.556820] __x64_sys_mprotect+0x78/0xc0 [ 31.557374] do_syscall_64+0x3f/0x90 [ 31.557848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.558488] [ 31.558710] Freed by task 19: [ 31.559096] kasan_save_stack+0x22/0x50 [ 31.559599] kasan_set_track+0x25/0x30 [ 31.560099] kasan_save_free_info+0x2b/0x50 [ 31.560639] __kasan_slab_free+0x10a/0x190 [ 31.561180] kmem_cache_free+0x10d/0x4d0 [ 31.561724] rcu_core+0x8c8/0x2860 [ 31.562174] __do_softirq+0x1b7/0x7d4 [ 31.562656] [ 31.562873] Last potentially related work creation: [ 31.563458] kasan_save_stack+0x22/0x50 [ 31.563961] __kasan_record_aux_stack+0x8e/0xa0 [ 31.564619] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.565286] remove_vma+0x139/0x170 [ 31.565736] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.566293] do_vmi_munmap+0x1f1/0x2b0 [ 31.566781] __vm_munmap+0x138/0x3a0 [ 31.567256] __x64_sys_munmap+0x59/0x80 [ 31.567770] do_syscall_64+0x3f/0x90 [ 31.568260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.568903] [ 31.569120] The buggy address belongs to the object at ffff88801a4fb0e8 [ 31.569120] which belongs to the cache vm_area_struct of size 168 [ 31.570618] The buggy address is located 88 bytes inside of [ 31.570618] freed 168-byte region [ffff88801a4fb0e8, ffff88801a4fb190) [ 31.572040] [ 31.572259] The buggy address belongs to the physical page: [ 31.572941] page:000000005307c81d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a4fb [ 31.574105] memcg:ffff888019f92801 [ 31.574539] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.575184] page_type: 0xffffffff() [ 31.575633] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.576552] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f92801 [ 31.577485] page dumped because: kasan: bad access detected [ 31.578147] [ 31.578362] Memory state around the buggy address: [ 31.578941] ffff88801a4fb000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.579790] ffff88801a4fb080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.580648] >ffff88801a4fb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.581508] ^ [ 31.582141] ffff88801a4fb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.582993] ffff88801a4fb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.583843] ================================================================== [ 31.584786] Disabling lock debugging due to kernel taint [ 33.653987] BUG: Bad rss-counter state mm:0000000058d991a4 type:MM_FILEPAGES val:33 [ 33.655020] BUG: Bad rss-counter state mm:0000000058d991a4 type:MM_ANONPAGES val:22 [ 34.112395] BUG: Bad rss-counter state mm:000000009d734b74 type:MM_FILEPAGES val:33 [ 34.113430] BUG: Bad rss-counter state mm:000000009d734b74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25342' (ECDSA) to the list of known hosts. 2023/06/20 05:30:42 fuzzer started 2023/06/20 05:30:43 dialing manager at localhost:44161 2023/06/20 05:30:43 checking machine... 2023/06/20 05:30:43 checking revisions... [ 34.814587] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:30:43 testing simple program... [ 34.863118] cgroup: Unknown subsys name 'net' [ 34.915580] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:30:41 Registers: info registers vcpu 0 RAX=1ffffffff0c26fba RBX=0000000000000002 RCX=ffffffff86137dd2 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff86137dd6 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09dd8 R15=ffff88806ce09a78 RIP=ffffffff81130b73 RFL=00000212 [----A--] 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 00007fdd9e9d9700 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=00007f34bdf6ebb0 CR3=0000000019ef0000 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=2032343a30333a3530203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a30333a3530203032 XMM08=3d656e696c646d632022656369767265 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=00007ffec3988c78 CR3=0000000005482000 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=00007fa48a2c3510000055d0e4021790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000