syzkaller login: [ 30.921121] BUG: Bad rss-counter state mm:000000001b736f0f type:MM_FILEPAGES val:33 [ 30.922125] BUG: Bad rss-counter state mm:000000001b736f0f type:MM_ANONPAGES val:22 [ 31.085869] ================================================================== [ 31.086756] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.087640] Read of size 8 at addr ffff88801800e6b0 by task sshd/220 [ 31.088371] [ 31.088581] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.089543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.090465] Call Trace: [ 31.090766] [ 31.091034] dump_stack_lvl+0x91/0xf0 [ 31.091535] print_report+0xcc/0x620 [ 31.092012] ? __virt_addr_valid+0x102/0x340 [ 31.092544] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.093137] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.093716] kasan_report+0xbe/0xf0 [ 31.094179] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.094769] vma_interval_tree_remove+0xc75/0xec0 [ 31.095334] vma_prepare+0xc54/0x11a0 [ 31.095793] __split_vma+0x5af/0x950 [ 31.096253] ? __pfx___split_vma+0x10/0x10 [ 31.096787] ? find_held_lock+0x2c/0x110 [ 31.097308] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.097866] ? lock_is_held_type+0x9f/0x120 [ 31.098374] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.098946] ? mtree_range_walk+0x632/0x900 [ 31.099462] ? mas_walk+0x5c7/0x7c0 [ 31.099916] do_vmi_munmap+0x1f1/0x2b0 [ 31.100416] mmap_region+0x1f9/0x2660 [ 31.100882] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.101385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.102095] ? __pfx_lock_acquire+0x10/0x10 [ 31.102618] ? __pfx_mmap_region+0x10/0x10 [ 31.103136] ? security_mmap_addr+0x7d/0xa0 [ 31.103667] ? get_unmapped_area+0x1f5/0x3f0 [ 31.104302] do_mmap+0x854/0xf00 [ 31.104834] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.105413] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.105973] ksys_mmap_pgoff+0x3af/0x500 [ 31.106459] do_syscall_64+0x3f/0x90 [ 31.106918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.107539] RIP: 0033:0x7fa437b97d82 [ 31.108001] 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 [ 31.110123] RSP: 002b:00007ffed9421448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.111022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa437b97d82 [ 31.111868] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa436fd1000 [ 31.112734] RBP: 00007fa436fd1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.113578] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b256d3ec0 [ 31.114428] R13: 00007ffed9421460 R14: 00007ffed9421490 R15: 00007ffed94217f0 [ 31.115290] [ 31.115583] [ 31.115798] Allocated by task 213: [ 31.116236] kasan_save_stack+0x22/0x50 [ 31.116739] kasan_set_track+0x25/0x30 [ 31.117232] __kasan_slab_alloc+0x59/0x70 [ 31.117766] kmem_cache_alloc+0x16b/0x370 [ 31.118286] vm_area_dup+0x20/0x160 [ 31.118733] __split_vma+0x170/0x950 [ 31.119203] split_vma+0xc6/0x110 [ 31.119628] mprotect_fixup+0x8d2/0xb30 [ 31.120128] do_mprotect_pkey+0x87e/0xd40 [ 31.120634] __x64_sys_mprotect+0x78/0xc0 [ 31.121158] do_syscall_64+0x3f/0x90 [ 31.121629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.122251] [ 31.122462] Freed by task 213: [ 31.122849] kasan_save_stack+0x22/0x50 [ 31.123353] kasan_set_track+0x25/0x30 [ 31.123837] kasan_save_free_info+0x2b/0x50 [ 31.124363] __kasan_slab_free+0x10a/0x190 [ 31.124890] kmem_cache_free+0x10d/0x4d0 [ 31.125393] rcu_core+0x8c8/0x2860 [ 31.125841] __do_softirq+0x1b7/0x7d4 [ 31.126322] [ 31.126530] Last potentially related work creation: [ 31.127121] kasan_save_stack+0x22/0x50 [ 31.127606] __kasan_record_aux_stack+0x8e/0xa0 [ 31.128204] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.128855] remove_vma+0x139/0x170 [ 31.129311] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.129948] do_vmi_munmap+0x1f1/0x2b0 [ 31.130445] __vm_munmap+0x138/0x3a0 [ 31.130915] __x64_sys_munmap+0x59/0x80 [ 31.131422] do_syscall_64+0x3f/0x90 [ 31.131893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.132560] [ 31.132784] The buggy address belongs to the object at ffff88801800e658 [ 31.132784] which belongs to the cache vm_area_struct of size 168 [ 31.134274] The buggy address is located 88 bytes inside of [ 31.134274] freed 168-byte region [ffff88801800e658, ffff88801800e700) [ 31.135703] [ 31.135916] The buggy address belongs to the physical page: [ 31.136583] page:0000000062b7fdfb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1800e [ 31.137679] memcg:ffff8880142eab01 [ 31.138111] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.138762] page_type: 0xffffffff() [ 31.139219] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.140142] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880142eab01 [ 31.141050] page dumped because: kasan: bad access detected [ 31.141720] [ 31.141937] Memory state around the buggy address: [ 31.142519] ffff88801800e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.143377] ffff88801800e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.144245] >ffff88801800e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.145092] ^ [ 31.145681] ffff88801800e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.146556] ffff88801800e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.147422] ================================================================== [ 31.148381] Disabling lock debugging due to kernel taint [ 33.143531] BUG: Bad rss-counter state mm:00000000a8641118 type:MM_FILEPAGES val:33 [ 33.144531] BUG: Bad rss-counter state mm:00000000a8641118 type:MM_ANONPAGES val:22 [ 33.662495] BUG: Bad rss-counter state mm:00000000667d890f type:MM_FILEPAGES val:33 [ 33.663593] BUG: Bad rss-counter state mm:00000000667d890f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44263' (ECDSA) to the list of known hosts. 2023/06/21 07:58:54 fuzzer started 2023/06/21 07:58:55 dialing manager at localhost:36067 2023/06/21 07:58:55 checking machine... 2023/06/21 07:58:55 checking revisions... [ 34.500769] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:58:55 testing simple program... [ 34.547858] cgroup: Unknown subsys name 'net' [ 34.593645] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:58:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffcbc6d0508 CR3=00000000142c4000 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=2034353a38353a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38353a3730203132 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000008 RSI=ffff88801803fa98 RDI=0000000000000001 RBP=ffff88801803faf8 RSP=ffff88801803f9e0 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88801803fb00 R13=ffff88801803fae8 R14=ffff88801803faa0 R15=ffff88801803faa0 RIP=ffffffff81131011 RFL=00000246 [---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 00007f5adb41f900 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=00007f5adb9d70b0 CR3=000000000e70a000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000