syzkaller login: [ 28.682096] BUG: Bad rss-counter state mm:00000000dca371d7 type:MM_FILEPAGES val:33 [ 28.683434] BUG: Bad rss-counter state mm:00000000dca371d7 type:MM_ANONPAGES val:22 [ 28.833090] ================================================================== [ 28.834036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.834975] Read of size 8 at addr ffff888009ad83f8 by task sshd/221 [ 28.835782] [ 28.836009] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.837085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.838088] Call Trace: [ 28.838405] [ 28.838689] dump_stack_lvl+0x91/0xf0 [ 28.839192] print_report+0xcc/0x620 [ 28.839681] ? __virt_addr_valid+0x102/0x340 [ 28.840229] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.840846] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.841469] kasan_report+0xbe/0xf0 [ 28.841954] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.842574] vma_interval_tree_remove+0xc75/0xec0 [ 28.843170] vma_prepare+0xc54/0x11a0 [ 28.843645] __split_vma+0x5af/0x950 [ 28.844125] ? __pfx___split_vma+0x10/0x10 [ 28.844654] ? find_held_lock+0x2c/0x110 [ 28.845176] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.845749] ? lock_is_held_type+0x9f/0x120 [ 28.846308] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.846934] ? mtree_range_walk+0x632/0x900 [ 28.847490] ? mas_walk+0x5c7/0x7c0 [ 28.847968] do_vmi_munmap+0x1f1/0x2b0 [ 28.848456] mmap_region+0x1f9/0x2660 [ 28.848945] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.849474] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.850215] ? __pfx_lock_acquire+0x10/0x10 [ 28.850755] ? __pfx_mmap_region+0x10/0x10 [ 28.851287] ? security_mmap_addr+0x7d/0xa0 [ 28.851827] ? get_unmapped_area+0x1f5/0x3f0 [ 28.852387] do_mmap+0x854/0xf00 [ 28.852838] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.853338] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.853918] ksys_mmap_pgoff+0x3af/0x500 [ 28.854429] do_syscall_64+0x3f/0x90 [ 28.854915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.855562] RIP: 0033:0x7fb841cd8d82 [ 28.856025] 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 [ 28.858172] RSP: 002b:00007ffc86eea798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.859064] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb841cd8d82 [ 28.859912] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb841112000 [ 28.860765] RBP: 00007fb841112000 R08: 0000000000000009 R09: 0000000000001000 [ 28.861629] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ab7a47ec0 [ 28.862474] R13: 00007ffc86eea7b0 R14: 00007ffc86eea7e0 R15: 00007ffc86eeab40 [ 28.863344] [ 28.863636] [ 28.863852] Allocated by task 214: [ 28.864279] kasan_save_stack+0x22/0x50 [ 28.864787] kasan_set_track+0x25/0x30 [ 28.865276] __kasan_slab_alloc+0x59/0x70 [ 28.865807] kmem_cache_alloc+0x16b/0x370 [ 28.866326] vm_area_dup+0x20/0x160 [ 28.866799] __split_vma+0x170/0x950 [ 28.867270] split_vma+0xc6/0x110 [ 28.867721] mprotect_fixup+0x8d2/0xb30 [ 28.868227] do_mprotect_pkey+0x87e/0xd40 [ 28.868760] __x64_sys_mprotect+0x78/0xc0 [ 28.869287] do_syscall_64+0x3f/0x90 [ 28.869780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.870425] [ 28.870645] Freed by task 214: [ 28.871047] kasan_save_stack+0x22/0x50 [ 28.871546] kasan_set_track+0x25/0x30 [ 28.872050] kasan_save_free_info+0x2b/0x50 [ 28.872589] __kasan_slab_free+0x10a/0x190 [ 28.873118] kmem_cache_free+0x10d/0x4d0 [ 28.873647] rcu_core+0x8c8/0x2860 [ 28.874096] __do_softirq+0x1b7/0x7d4 [ 28.874572] [ 28.874788] Last potentially related work creation: [ 28.875368] kasan_save_stack+0x22/0x50 [ 28.875876] __kasan_record_aux_stack+0x8e/0xa0 [ 28.876449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.877091] remove_vma+0x139/0x170 [ 28.877550] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.878242] do_vmi_munmap+0x1f1/0x2b0 [ 28.878733] __vm_munmap+0x138/0x3a0 [ 28.879205] __x64_sys_munmap+0x59/0x80 [ 28.879704] do_syscall_64+0x3f/0x90 [ 28.880176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.880817] [ 28.881035] The buggy address belongs to the object at ffff888009ad83a0 [ 28.881035] which belongs to the cache vm_area_struct of size 168 [ 28.882530] The buggy address is located 88 bytes inside of [ 28.882530] freed 168-byte region [ffff888009ad83a0, ffff888009ad8448) [ 28.883919] [ 28.884136] The buggy address belongs to the physical page: [ 28.884782] page:00000000963d89b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9ad8 [ 28.885860] memcg:ffff88800de45a01 [ 28.886292] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.886933] page_type: 0xffffffff() [ 28.887381] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7180 dead000000000004 [ 28.888291] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de45a01 [ 28.889207] page dumped because: kasan: bad access detected [ 28.889899] [ 28.890119] Memory state around the buggy address: [ 28.890703] ffff888009ad8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 28.891548] ffff888009ad8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 28.892404] >ffff888009ad8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.893252] ^ [ 28.894108] ffff888009ad8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.894968] ffff888009ad8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.895819] ================================================================== [ 28.896733] Disabling lock debugging due to kernel taint [ 31.111666] BUG: Bad rss-counter state mm:000000006c95cbfc type:MM_FILEPAGES val:33 [ 31.113018] BUG: Bad rss-counter state mm:000000006c95cbfc type:MM_ANONPAGES val:22 [ 31.595965] BUG: Bad rss-counter state mm:0000000017460759 type:MM_FILEPAGES val:33 [ 31.597395] BUG: Bad rss-counter state mm:0000000017460759 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62632' (ECDSA) to the list of known hosts. 2023/06/20 16:51:36 fuzzer started 2023/06/20 16:51:36 dialing manager at localhost:36067 2023/06/20 16:51:36 checking machine... 2023/06/20 16:51:36 checking revisions... [ 32.284295] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:51:36 testing simple program... [ 32.330330] cgroup: Unknown subsys name 'net' [ 32.388354] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:51:36 Registers: info registers vcpu 0 RAX=0000000000009789 RBX=0000000000000001 RCX=ffffffff811fc523 RDX=0000000000009792 RSI=0000000000001fc5 RDI=ffffffff860aca74 RBP=ffff88801584fa18 RSP=ffff88801584f950 R8 =ffffffff860aca3e R9 =ffff88801584fa00 R10=0000000000038001 R11=0000000000009789 R12=ffff88801584fa20 R13=ffff88801584fa08 R14=ffff88801584fa01 R15=ffff88801584f9c0 RIP=ffffffff81130861 RFL=00000287 [--S--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 00007f4a74800900 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=00007f4a74db5650 CR3=000000000c616000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffee73915f8 CR3=000000000e3d4000 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=2036333a31353a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a31353a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000