syzkaller login: [ 32.539096] BUG: Bad rss-counter state mm:000000007f45ccaf type:MM_FILEPAGES val:33 [ 32.539884] BUG: Bad rss-counter state mm:000000007f45ccaf type:MM_ANONPAGES val:22 [ 32.645486] ================================================================== [ 32.646561] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.647672] Read of size 8 at addr ffff88800ddf34e0 by task sshd/219 [ 32.648792] [ 32.649050] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.649727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.650262] Call Trace: [ 32.650457] [ 32.650615] dump_stack_lvl+0x91/0xf0 [ 32.650883] print_report+0xcc/0x620 [ 32.651150] ? __virt_addr_valid+0x102/0x340 [ 32.651460] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.651800] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.652135] kasan_report+0xbe/0xf0 [ 32.652395] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.652743] vma_interval_tree_remove+0xc75/0xec0 [ 32.653074] vma_prepare+0xc54/0x11a0 [ 32.653338] __split_vma+0x5af/0x950 [ 32.653597] ? __pfx___split_vma+0x10/0x10 [ 32.653887] ? find_held_lock+0x2c/0x110 [ 32.654172] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.654479] ? lock_is_held_type+0x9f/0x120 [ 32.654773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.655109] ? mtree_range_walk+0x632/0x900 [ 32.655413] ? mas_walk+0x5c7/0x7c0 [ 32.655675] do_vmi_munmap+0x1f1/0x2b0 [ 32.655945] mmap_region+0x1f9/0x2660 [ 32.656210] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.656492] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.656893] ? __pfx_lock_acquire+0x10/0x10 [ 32.657188] ? __pfx_mmap_region+0x10/0x10 [ 32.657479] ? security_mmap_addr+0x7d/0xa0 [ 32.657771] ? get_unmapped_area+0x1f5/0x3f0 [ 32.658075] do_mmap+0x854/0xf00 [ 32.658316] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.658590] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.658899] ksys_mmap_pgoff+0x3af/0x500 [ 32.659175] do_syscall_64+0x3f/0x90 [ 32.659440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.659794] RIP: 0033:0x7f57634d2d82 [ 32.660046] 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 [ 32.661247] RSP: 002b:00007ffe29a9e9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.661755] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57634d2d82 [ 32.662215] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f576290c000 [ 32.662682] RBP: 00007f576290c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.663146] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba6c7e3ec0 [ 32.663618] R13: 00007ffe29a9ea10 R14: 00007ffe29a9ea40 R15: 00007ffe29a9eda0 [ 32.664087] [ 32.664249] [ 32.664367] Allocated by task 212: [ 32.664620] kasan_save_stack+0x22/0x50 [ 32.664898] kasan_set_track+0x25/0x30 [ 32.665170] __kasan_slab_alloc+0x59/0x70 [ 32.665457] kmem_cache_alloc+0x16b/0x370 [ 32.665741] vm_area_dup+0x20/0x160 [ 32.665990] __split_vma+0x170/0x950 [ 32.666245] split_vma+0xc6/0x110 [ 32.666485] mprotect_fixup+0x8d2/0xb30 [ 32.666760] do_mprotect_pkey+0x87e/0xd40 [ 32.667046] __x64_sys_mprotect+0x78/0xc0 [ 32.667330] do_syscall_64+0x3f/0x90 [ 32.667598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.667948] [ 32.668066] Freed by task 212: [ 32.668283] kasan_save_stack+0x22/0x50 [ 32.668562] kasan_set_track+0x25/0x30 [ 32.668844] kasan_save_free_info+0x2b/0x50 [ 32.669138] __kasan_slab_free+0x10a/0x190 [ 32.669430] kmem_cache_free+0x10d/0x4d0 [ 32.669715] rcu_core+0x8c8/0x2860 [ 32.669958] __do_softirq+0x1b7/0x7d4 [ 32.670220] [ 32.670338] Last potentially related work creation: [ 32.670665] kasan_save_stack+0x22/0x50 [ 32.670944] __kasan_record_aux_stack+0x8e/0xa0 [ 32.671257] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.671611] remove_vma+0x139/0x170 [ 32.671856] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.672159] do_vmi_munmap+0x1f1/0x2b0 [ 32.672426] __vm_munmap+0x138/0x3a0 [ 32.672691] __x64_sys_munmap+0x59/0x80 [ 32.672967] do_syscall_64+0x3f/0x90 [ 32.673227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.673582] [ 32.673700] The buggy address belongs to the object at ffff88800ddf3488 [ 32.673700] which belongs to the cache vm_area_struct of size 168 [ 32.674512] The buggy address is located 88 bytes inside of [ 32.674512] freed 168-byte region [ffff88800ddf3488, ffff88800ddf3530) [ 32.675276] [ 32.675394] The buggy address belongs to the physical page: [ 32.675759] page:00000000b5a32723 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddf3 [ 32.676355] memcg:ffff88800f763b01 [ 32.676593] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.676983] page_type: 0xffffffff() [ 32.677247] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.677766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f763b01 [ 32.678260] page dumped because: kasan: bad access detected [ 32.678617] [ 32.678734] Memory state around the buggy address: [ 32.679051] ffff88800ddf3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.679522] ffff88800ddf3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.679984] >ffff88800ddf3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.680463] ^ [ 32.680887] ffff88800ddf3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.681351] ffff88800ddf3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.681811] ================================================================== [ 32.682322] Disabling lock debugging due to kernel taint [ 34.607324] BUG: Bad rss-counter state mm:0000000087becc6b type:MM_FILEPAGES val:33 [ 34.608703] BUG: Bad rss-counter state mm:0000000087becc6b type:MM_ANONPAGES val:22 [ 35.055497] BUG: Bad rss-counter state mm:000000009cd55118 type:MM_FILEPAGES val:33 [ 35.056495] BUG: Bad rss-counter state mm:000000009cd55118 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34660' (ECDSA) to the list of known hosts. 2023/06/19 12:10:15 fuzzer started 2023/06/19 12:10:15 dialing manager at localhost:44161 2023/06/19 12:10:15 checking machine... 2023/06/19 12:10:15 checking revisions... [ 35.772250] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:10:15 testing simple program... [ 35.818633] cgroup: Unknown subsys name 'net' [ 35.853160] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:10:13 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100392aee3 RSP=ffff88801c957708 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000d000c R12=ffff88806ce3de20 R13=ffffffff81806192 R14=0000000000000000 R15=0000000000000007 RIP=ffffffff812d86a2 RFL=00000047 [---Z-PC] 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 00007fce4d1f4900 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=00005615d59e22a8 CR3=000000001a2ca000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=ffff888008c58400 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=00007ffc82023768 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=00007fd19600651000005574afbfa790 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