syzkaller login: [ 30.606565] BUG: Bad rss-counter state mm:00000000076e45a4 type:MM_FILEPAGES val:33 [ 30.607558] BUG: Bad rss-counter state mm:00000000076e45a4 type:MM_ANONPAGES val:22 [ 30.781174] ================================================================== [ 30.782164] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.783155] Read of size 8 at addr ffff88801a24cc20 by task sshd/220 [ 30.784119] [ 30.784355] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.785286] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.786341] Call Trace: [ 30.786678] [ 30.786982] dump_stack_lvl+0x91/0xf0 [ 30.787508] print_report+0xcc/0x620 [ 30.788021] ? __virt_addr_valid+0x102/0x340 [ 30.788602] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.789266] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.789922] kasan_report+0xbe/0xf0 [ 30.790437] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.791104] vma_interval_tree_remove+0xc75/0xec0 [ 30.791751] vma_prepare+0xc54/0x11a0 [ 30.792267] __split_vma+0x5af/0x950 [ 30.792780] ? __pfx___split_vma+0x10/0x10 [ 30.793352] ? find_held_lock+0x2c/0x110 [ 30.793913] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.794514] ? lock_is_held_type+0x9f/0x120 [ 30.795091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.795746] ? mtree_range_walk+0x632/0x900 [ 30.796333] ? mas_walk+0x5c7/0x7c0 [ 30.796865] do_vmi_munmap+0x1f1/0x2b0 [ 30.797401] mmap_region+0x1f9/0x2660 [ 30.797927] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.798475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.799255] ? __pfx_lock_acquire+0x10/0x10 [ 30.799837] ? __pfx_mmap_region+0x10/0x10 [ 30.800416] ? security_mmap_addr+0x7d/0xa0 [ 30.801001] ? get_unmapped_area+0x1f5/0x3f0 [ 30.801598] do_mmap+0x854/0xf00 [ 30.802081] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.802615] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.803219] ksys_mmap_pgoff+0x3af/0x500 [ 30.803755] do_syscall_64+0x3f/0x90 [ 30.804273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804980] RIP: 0033:0x7f770a101d82 [ 30.805468] 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 [ 30.807719] RSP: 002b:00007ffd6e8288d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.808697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f770a101d82 [ 30.809614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f770953b000 [ 30.810535] RBP: 00007f770953b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.811441] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562010128ec0 [ 30.812353] R13: 00007ffd6e8288f0 R14: 00007ffd6e828920 R15: 00007ffd6e828c80 [ 30.813289] [ 30.813607] [ 30.813841] Allocated by task 213: [ 30.814299] kasan_save_stack+0x22/0x50 [ 30.814849] kasan_set_track+0x25/0x30 [ 30.815384] __kasan_slab_alloc+0x59/0x70 [ 30.815944] kmem_cache_alloc+0x16b/0x370 [ 30.816495] vm_area_dup+0x20/0x160 [ 30.817000] __split_vma+0x170/0x950 [ 30.817507] split_vma+0xc6/0x110 [ 30.817979] mprotect_fixup+0x8d2/0xb30 [ 30.818520] do_mprotect_pkey+0x87e/0xd40 [ 30.819078] __x64_sys_mprotect+0x78/0xc0 [ 30.819644] do_syscall_64+0x3f/0x90 [ 30.820159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820882] [ 30.821117] Freed by task 19: [ 30.821533] kasan_save_stack+0x22/0x50 [ 30.822078] kasan_set_track+0x25/0x30 [ 30.822618] kasan_save_free_info+0x2b/0x50 [ 30.823198] __kasan_slab_free+0x10a/0x190 [ 30.823775] kmem_cache_free+0x10d/0x4d0 [ 30.824326] rcu_core+0x8c8/0x2860 [ 30.824826] __do_softirq+0x1b7/0x7d4 [ 30.825411] [ 30.825643] Last potentially related work creation: [ 30.826266] kasan_save_stack+0x22/0x50 [ 30.826807] __kasan_record_aux_stack+0x8e/0xa0 [ 30.827425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.828112] remove_vma+0x139/0x170 [ 30.828596] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.829204] do_vmi_munmap+0x1f1/0x2b0 [ 30.829733] __vm_munmap+0x138/0x3a0 [ 30.830234] __x64_sys_munmap+0x59/0x80 [ 30.830782] do_syscall_64+0x3f/0x90 [ 30.831289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.831991] [ 30.832221] The buggy address belongs to the object at ffff88801a24cbc8 [ 30.832221] which belongs to the cache vm_area_struct of size 168 [ 30.833804] The buggy address is located 88 bytes inside of [ 30.833804] freed 168-byte region [ffff88801a24cbc8, ffff88801a24cc70) [ 30.835304] [ 30.835534] The buggy address belongs to the physical page: [ 30.836236] page:00000000176631f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a24c [ 30.837411] memcg:ffff888015de7901 [ 30.837875] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.838573] page_type: 0xffffffff() [ 30.839059] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.840037] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015de7901 [ 30.841006] page dumped because: kasan: bad access detected [ 30.841714] [ 30.841948] Memory state around the buggy address: [ 30.842563] ffff88801a24cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.843489] ffff88801a24cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.844407] >ffff88801a24cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.845339] ^ [ 30.845910] ffff88801a24cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.846835] ffff88801a24cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.847749] ================================================================== [ 30.848786] Disabling lock debugging due to kernel taint [ 32.851574] BUG: Bad rss-counter state mm:00000000a074b87a type:MM_FILEPAGES val:33 [ 32.853258] BUG: Bad rss-counter state mm:00000000a074b87a type:MM_ANONPAGES val:22 [ 33.417262] BUG: Bad rss-counter state mm:00000000aa515d0b type:MM_FILEPAGES val:33 [ 33.418426] BUG: Bad rss-counter state mm:00000000aa515d0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64357' (ECDSA) to the list of known hosts. 2023/06/20 03:37:46 fuzzer started 2023/06/20 03:37:46 dialing manager at localhost:44161 2023/06/20 03:37:46 checking machine... 2023/06/20 03:37:46 checking revisions... [ 34.052451] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:37:46 testing simple program... [ 34.089589] cgroup: Unknown subsys name 'net' [ 34.155636] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:37:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffede802498 CR3=0000000005482000 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=00007f04b36d45100000555f9315e790 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 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=00007fe122896420 CR3=000000000fed6000 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=2036343a37333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a37333a3330203032 XMM08=00007fc5f40318a00000006600000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000