syzkaller login: [ 31.622283] BUG: Bad rss-counter state mm:0000000070e24216 type:MM_FILEPAGES val:33 [ 31.623612] BUG: Bad rss-counter state mm:0000000070e24216 type:MM_ANONPAGES val:22 [ 31.787287] ================================================================== [ 31.788420] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.789470] Read of size 8 at addr ffff888019366310 by task sshd/220 [ 31.790511] [ 31.790744] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.791665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.792731] Call Trace: [ 31.793070] [ 31.793375] dump_stack_lvl+0x91/0xf0 [ 31.793900] print_report+0xcc/0x620 [ 31.794420] ? __virt_addr_valid+0x102/0x340 [ 31.795018] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.795674] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.796362] kasan_report+0xbe/0xf0 [ 31.796873] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.797558] vma_interval_tree_remove+0xc75/0xec0 [ 31.798225] vma_prepare+0xc54/0x11a0 [ 31.798759] __split_vma+0x5af/0x950 [ 31.799287] ? __pfx___split_vma+0x10/0x10 [ 31.799874] ? find_held_lock+0x2c/0x110 [ 31.800456] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.801084] ? lock_is_held_type+0x9f/0x120 [ 31.801685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.802362] ? mtree_range_walk+0x632/0x900 [ 31.802975] ? mas_walk+0x5c7/0x7c0 [ 31.803506] do_vmi_munmap+0x1f1/0x2b0 [ 31.804061] mmap_region+0x1f9/0x2660 [ 31.804602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.805172] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.805968] ? __pfx_lock_acquire+0x10/0x10 [ 31.806564] ? __pfx_mmap_region+0x10/0x10 [ 31.807156] ? security_mmap_addr+0x7d/0xa0 [ 31.807746] ? get_unmapped_area+0x1f5/0x3f0 [ 31.808376] do_mmap+0x854/0xf00 [ 31.808866] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.809415] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.810039] ksys_mmap_pgoff+0x3af/0x500 [ 31.810606] do_syscall_64+0x3f/0x90 [ 31.811140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.811866] RIP: 0033:0x7f2318374d82 [ 31.812374] 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 [ 31.814746] RSP: 002b:00007ffe9d9fb7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.815754] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2318374d82 [ 31.816708] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23177ae000 [ 31.817647] RBP: 00007f23177ae000 R08: 0000000000000009 R09: 0000000000001000 [ 31.818584] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f6ae1eec0 [ 31.819530] R13: 00007ffe9d9fb7e0 R14: 00007ffe9d9fb810 R15: 00007ffe9d9fbb70 [ 31.820503] [ 31.820828] [ 31.821064] Allocated by task 213: [ 31.821538] kasan_save_stack+0x22/0x50 [ 31.822098] kasan_set_track+0x25/0x30 [ 31.822647] __kasan_slab_alloc+0x59/0x70 [ 31.823232] kmem_cache_alloc+0x16b/0x370 [ 31.823816] vm_area_dup+0x20/0x160 [ 31.824327] __split_vma+0x170/0x950 [ 31.824847] split_vma+0xc6/0x110 [ 31.825336] mprotect_fixup+0x8d2/0xb30 [ 31.825896] do_mprotect_pkey+0x87e/0xd40 [ 31.826477] __x64_sys_mprotect+0x78/0xc0 [ 31.827058] do_syscall_64+0x3f/0x90 [ 31.827585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.828316] [ 31.828558] Freed by task 213: [ 31.828997] kasan_save_stack+0x22/0x50 [ 31.829559] kasan_set_track+0x25/0x30 [ 31.830108] kasan_save_free_info+0x2b/0x50 [ 31.830699] __kasan_slab_free+0x10a/0x190 [ 31.831296] kmem_cache_free+0x10d/0x4d0 [ 31.831870] rcu_core+0x8c8/0x2860 [ 31.832360] __do_softirq+0x1b7/0x7d4 [ 31.832889] [ 31.833125] Last potentially related work creation: [ 31.833777] kasan_save_stack+0x22/0x50 [ 31.834338] __kasan_record_aux_stack+0x8e/0xa0 [ 31.834976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.835689] remove_vma+0x139/0x170 [ 31.836206] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.836826] do_vmi_munmap+0x1f1/0x2b0 [ 31.837371] __vm_munmap+0x138/0x3a0 [ 31.837890] __x64_sys_munmap+0x59/0x80 [ 31.838444] do_syscall_64+0x3f/0x90 [ 31.838967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.839679] [ 31.839925] The buggy address belongs to the object at ffff8880193662b8 [ 31.839925] which belongs to the cache vm_area_struct of size 168 [ 31.841558] The buggy address is located 88 bytes inside of [ 31.841558] freed 168-byte region [ffff8880193662b8, ffff888019366360) [ 31.843123] [ 31.843361] The buggy address belongs to the physical page: [ 31.844107] page:00000000114dca40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19366 [ 31.845321] memcg:ffff888019acd201 [ 31.845795] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.846519] page_type: 0xffffffff() [ 31.847023] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.848051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019acd201 [ 31.849056] page dumped because: kasan: bad access detected [ 31.849794] [ 31.850034] Memory state around the buggy address: [ 31.850681] ffff888019366200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.851628] ffff888019366280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.852578] >ffff888019366300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.853528] ^ [ 31.854048] ffff888019366380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.854998] ffff888019366400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.855958] ================================================================== [ 31.857329] Disabling lock debugging due to kernel taint [ 34.073228] BUG: Bad rss-counter state mm:0000000006f36ea9 type:MM_FILEPAGES val:33 [ 34.074227] BUG: Bad rss-counter state mm:0000000006f36ea9 type:MM_ANONPAGES val:22 [ 34.562019] BUG: Bad rss-counter state mm:00000000a20efe8b type:MM_FILEPAGES val:33 [ 34.562770] BUG: Bad rss-counter state mm:00000000a20efe8b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47425' (ECDSA) to the list of known hosts. 2023/06/19 18:17:45 fuzzer started 2023/06/19 18:17:45 dialing manager at localhost:44161 2023/06/19 18:17:45 checking machine... 2023/06/19 18:17:45 checking revisions... [ 35.227388] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:17:45 testing simple program... [ 35.279199] cgroup: Unknown subsys name 'net' [ 35.319472] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:17:43 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=00007ffda3ca7658 CR3=000000000f550000 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=2034343a37313a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a37313a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001be5c13 RBX=ffff88800df2e068 RCX=1ffff11001bfd4ac RDX=dffffc0000000000 RSI=ffff88801810c138 RDI=ffff88800df2e098 RBP=ffff88800d93b9f8 RSP=ffff88801658fc58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88801810c000 R13=0000000000000000 R14=ffff88800ca1c2a8 R15=ffff88800ca1c260 RIP=ffffffff818474fe 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 00007fd0f8cd4900 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=00007ffdad7cc000 CR3=0000000016db0000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000