syzkaller login: [ 30.621396] BUG: Bad rss-counter state mm:0000000085b34313 type:MM_FILEPAGES val:33 [ 30.622651] BUG: Bad rss-counter state mm:0000000085b34313 type:MM_ANONPAGES val:22 [ 30.772816] ================================================================== [ 30.773742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.774678] Read of size 8 at addr ffff88800e3ac4e0 by task sshd/220 [ 30.775453] [ 30.775668] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.776722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.777701] Call Trace: [ 30.778023] [ 30.778306] dump_stack_lvl+0x91/0xf0 [ 30.778826] print_report+0xcc/0x620 [ 30.779321] ? __virt_addr_valid+0x102/0x340 [ 30.779881] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.780499] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.781110] kasan_report+0xbe/0xf0 [ 30.781591] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782214] vma_interval_tree_remove+0xc75/0xec0 [ 30.782809] vma_prepare+0xc54/0x11a0 [ 30.783293] __split_vma+0x5af/0x950 [ 30.783766] ? __pfx___split_vma+0x10/0x10 [ 30.784310] ? find_held_lock+0x2c/0x110 [ 30.784837] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.785414] ? lock_is_held_type+0x9f/0x120 [ 30.785961] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.786568] ? mtree_range_walk+0x632/0x900 [ 30.787122] ? mas_walk+0x5c7/0x7c0 [ 30.787601] do_vmi_munmap+0x1f1/0x2b0 [ 30.788117] mmap_region+0x1f9/0x2660 [ 30.788602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.789114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.789833] ? __pfx_lock_acquire+0x10/0x10 [ 30.790378] ? __pfx_mmap_region+0x10/0x10 [ 30.790908] ? security_mmap_addr+0x7d/0xa0 [ 30.791440] ? get_unmapped_area+0x1f5/0x3f0 [ 30.792005] do_mmap+0x854/0xf00 [ 30.792445] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.792935] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.793520] ksys_mmap_pgoff+0x3af/0x500 [ 30.794047] do_syscall_64+0x3f/0x90 [ 30.794530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795188] RIP: 0033:0x7f3b37787d82 [ 30.795644] 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 [ 30.797798] RSP: 002b:00007ffe73be8418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.798722] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b37787d82 [ 30.799589] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b36bc1000 [ 30.800448] RBP: 00007f3b36bc1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.801309] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c78aabb20 [ 30.802155] R13: 00007ffe73be8430 R14: 00007ffe73be8460 R15: 00007ffe73be87c0 [ 30.803017] [ 30.803317] [ 30.803534] Allocated by task 213: [ 30.803977] kasan_save_stack+0x22/0x50 [ 30.804481] kasan_set_track+0x25/0x30 [ 30.804981] __kasan_slab_alloc+0x59/0x70 [ 30.805506] kmem_cache_alloc+0x16b/0x370 [ 30.806027] vm_area_dup+0x20/0x160 [ 30.806487] __split_vma+0x170/0x950 [ 30.806956] split_vma+0xc6/0x110 [ 30.807396] mprotect_fixup+0x8d2/0xb30 [ 30.807920] do_mprotect_pkey+0x87e/0xd40 [ 30.808444] __x64_sys_mprotect+0x78/0xc0 [ 30.808973] do_syscall_64+0x3f/0x90 [ 30.809452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.810105] [ 30.810321] Freed by task 213: [ 30.810711] kasan_save_stack+0x22/0x50 [ 30.811227] kasan_set_track+0x25/0x30 [ 30.811720] kasan_save_free_info+0x2b/0x50 [ 30.812261] __kasan_slab_free+0x10a/0x190 [ 30.812794] kmem_cache_free+0x10d/0x4d0 [ 30.813302] rcu_core+0x8c8/0x2860 [ 30.813754] __do_softirq+0x1b7/0x7d4 [ 30.814241] [ 30.814458] Last potentially related work creation: [ 30.815048] kasan_save_stack+0x22/0x50 [ 30.815561] __kasan_record_aux_stack+0x8e/0xa0 [ 30.816160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.816803] remove_vma+0x139/0x170 [ 30.817264] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.817883] do_vmi_munmap+0x1f1/0x2b0 [ 30.818381] __vm_munmap+0x138/0x3a0 [ 30.818847] __x64_sys_munmap+0x59/0x80 [ 30.819357] do_syscall_64+0x3f/0x90 [ 30.819846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820499] [ 30.820716] The buggy address belongs to the object at ffff88800e3ac488 [ 30.820716] which belongs to the cache vm_area_struct of size 168 [ 30.822205] The buggy address is located 88 bytes inside of [ 30.822205] freed 168-byte region [ffff88800e3ac488, ffff88800e3ac530) [ 30.823642] [ 30.823866] The buggy address belongs to the physical page: [ 30.824539] page:000000007486066c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3ac [ 30.825619] memcg:ffff888015b2c301 [ 30.826042] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.826692] page_type: 0xffffffff() [ 30.827142] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.828089] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b2c301 [ 30.829010] page dumped because: kasan: bad access detected [ 30.829673] [ 30.829891] Memory state around the buggy address: [ 30.830469] ffff88800e3ac380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.831330] ffff88800e3ac400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.832194] >ffff88800e3ac480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.833054] ^ [ 30.833814] ffff88800e3ac500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.834663] ffff88800e3ac580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.835512] ================================================================== [ 30.836443] Disabling lock debugging due to kernel taint [ 33.040033] BUG: Bad rss-counter state mm:00000000472d68aa type:MM_FILEPAGES val:33 [ 33.041264] BUG: Bad rss-counter state mm:00000000472d68aa type:MM_ANONPAGES val:22 [ 33.506296] BUG: Bad rss-counter state mm:00000000a74f9afb type:MM_FILEPAGES val:33 [ 33.507308] BUG: Bad rss-counter state mm:00000000a74f9afb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31334' (ECDSA) to the list of known hosts. 2023/06/19 16:02:17 fuzzer started 2023/06/19 16:02:17 dialing manager at localhost:44161 2023/06/19 16:02:17 checking machine... 2023/06/19 16:02:17 checking revisions... [ 34.228702] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:02:17 testing simple program... [ 34.270664] cgroup: Unknown subsys name 'net' [ 34.307858] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:02:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff888018b7fa90 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff1100316ff53 RIP=ffffffff845308c8 RFL=00000002 [-------] 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 00007f4c58ee9900 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=00007f4c594a10b0 CR3=000000000da2e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f978be06598 CR3=000000000e7ac000 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=98c8f502cbe808a34a42b42585470cc9 XMM02=2c67c8bc2e329bc3000000000011f8e8 XMM03=fb795ef6d65770560000000000124088 XMM04=a05c6d0c5d9eba2600000000000ae988 XMM05=19e9129bd510f2350000000000133c28 XMM06=46de3f6273fae3540000000000132a90 XMM07=e042d86d42eb936e0000000000124308 XMM08=d464d8cb45572c42000000000011f948 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000