syzkaller login: [ 37.950152] BUG: Bad rss-counter state mm:00000000c32d7717 type:MM_FILEPAGES val:33 [ 37.951647] BUG: Bad rss-counter state mm:00000000c32d7717 type:MM_ANONPAGES val:22 [ 38.119351] ================================================================== [ 38.120505] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.121511] Read of size 8 at addr ffff888019fd0d08 by task sshd/220 [ 38.122373] [ 38.122588] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.123449] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.124423] Call Trace: [ 38.124739] [ 38.125024] dump_stack_lvl+0x91/0xf0 [ 38.125514] print_report+0xcc/0x620 [ 38.125998] ? __virt_addr_valid+0x102/0x340 [ 38.126545] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.127164] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.127782] kasan_report+0xbe/0xf0 [ 38.128266] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.128887] vma_interval_tree_remove+0xc75/0xec0 [ 38.129485] vma_prepare+0xc54/0x11a0 [ 38.129961] __split_vma+0x5af/0x950 [ 38.130433] ? __pfx___split_vma+0x10/0x10 [ 38.130953] ? find_held_lock+0x2c/0x110 [ 38.131466] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.132020] ? lock_is_held_type+0x9f/0x120 [ 38.132595] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.133199] ? mtree_range_walk+0x632/0x900 [ 38.133750] ? mas_walk+0x5c7/0x7c0 [ 38.134228] do_vmi_munmap+0x1f1/0x2b0 [ 38.134722] mmap_region+0x1f9/0x2660 [ 38.135204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.135709] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.136418] ? __pfx_lock_acquire+0x10/0x10 [ 38.136954] ? __pfx_mmap_region+0x10/0x10 [ 38.137482] ? security_mmap_addr+0x7d/0xa0 [ 38.138008] ? get_unmapped_area+0x1f5/0x3f0 [ 38.138560] do_mmap+0x854/0xf00 [ 38.139001] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.139502] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.140067] ksys_mmap_pgoff+0x3af/0x500 [ 38.140575] do_syscall_64+0x3f/0x90 [ 38.141053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.141699] RIP: 0033:0x7f8f67fced82 [ 38.142152] 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 [ 38.144294] RSP: 002b:00007ffd06e57ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.145193] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f67fced82 [ 38.146032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f67408000 [ 38.146877] RBP: 00007f8f67408000 R08: 0000000000000009 R09: 0000000000001000 [ 38.147729] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae39015b20 [ 38.148578] R13: 00007ffd06e57bc0 R14: 00007ffd06e57bf0 R15: 00007ffd06e57f50 [ 38.149422] [ 38.149714] [ 38.149926] Allocated by task 213: [ 38.150352] kasan_save_stack+0x22/0x50 [ 38.150853] kasan_set_track+0x25/0x30 [ 38.151350] __kasan_slab_alloc+0x59/0x70 [ 38.151870] kmem_cache_alloc+0x16b/0x370 [ 38.152400] vm_area_dup+0x20/0x160 [ 38.152853] __split_vma+0x170/0x950 [ 38.153314] split_vma+0xc6/0x110 [ 38.153753] mprotect_fixup+0x8d2/0xb30 [ 38.154252] do_mprotect_pkey+0x87e/0xd40 [ 38.154769] __x64_sys_mprotect+0x78/0xc0 [ 38.155291] do_syscall_64+0x3f/0x90 [ 38.155763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.156418] [ 38.156633] Freed by task 203: [ 38.157029] kasan_save_stack+0x22/0x50 [ 38.157545] kasan_set_track+0x25/0x30 [ 38.158044] kasan_save_free_info+0x2b/0x50 [ 38.158580] __kasan_slab_free+0x10a/0x190 [ 38.159107] kmem_cache_free+0x10d/0x4d0 [ 38.159615] rcu_core+0x8c8/0x2860 [ 38.160052] __do_softirq+0x1b7/0x7d4 [ 38.160527] [ 38.160740] Last potentially related work creation: [ 38.161323] kasan_save_stack+0x22/0x50 [ 38.161825] __kasan_record_aux_stack+0x8e/0xa0 [ 38.162394] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.163041] remove_vma+0x139/0x170 [ 38.163487] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.164036] do_vmi_munmap+0x1f1/0x2b0 [ 38.164533] __vm_munmap+0x138/0x3a0 [ 38.164993] __x64_sys_munmap+0x59/0x80 [ 38.165489] do_syscall_64+0x3f/0x90 [ 38.165958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.166598] [ 38.166811] The buggy address belongs to the object at ffff888019fd0cb0 [ 38.166811] which belongs to the cache vm_area_struct of size 168 [ 38.168304] The buggy address is located 88 bytes inside of [ 38.168304] freed 168-byte region [ffff888019fd0cb0, ffff888019fd0d58) [ 38.169715] [ 38.169930] The buggy address belongs to the physical page: [ 38.170590] page:00000000a4a47948 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fd0 [ 38.171689] memcg:ffff88801a037a01 [ 38.172117] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.172765] page_type: 0xffffffff() [ 38.173209] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.174126] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a037a01 [ 38.175049] page dumped because: kasan: bad access detected [ 38.175705] [ 38.175919] Memory state around the buggy address: [ 38.176529] ffff888019fd0c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.177375] ffff888019fd0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.178229] >ffff888019fd0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.179068] ^ [ 38.179509] ffff888019fd0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.180376] ffff888019fd0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.181231] ================================================================== [ 38.182331] Disabling lock debugging due to kernel taint [ 39.976685] BUG: Bad rss-counter state mm:00000000d18324e9 type:MM_FILEPAGES val:33 [ 39.977324] BUG: Bad rss-counter state mm:00000000d18324e9 type:MM_ANONPAGES val:22 [ 40.368597] BUG: Bad rss-counter state mm:00000000f8e0210b type:MM_FILEPAGES val:33 [ 40.369519] BUG: Bad rss-counter state mm:00000000f8e0210b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6523' (ECDSA) to the list of known hosts. 2023/06/20 00:50:20 fuzzer started 2023/06/20 00:50:20 dialing manager at localhost:44161 2023/06/20 00:50:21 checking machine... 2023/06/20 00:50:21 checking revisions... [ 41.096156] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:50:21 testing simple program... [ 41.151043] cgroup: Unknown subsys name 'net' [ 41.209633] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:50:13 Registers: info registers vcpu 0 RAX=ffff88800cb9f2b8 RBX=ffff88800cba68b8 RCX=1ffff1100190ce86 RDX=dffffc0000000000 RSI=ffff88800c9a9e00 RDI=ffff88800cba68e8 RBP=ffff88800cde9d88 RSP=ffff8880102877b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800c9a9c00 R13=0000000000000000 R14=ffff88800ef90898 R15=ffff88800ef90850 RIP=ffffffff81847508 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 00007f1c4bd63900 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=00007f1c4c318650 CR3=000000000e9e4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fc3d1a11560 CR3=000000000d660000 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=2290dc2b661aecbc034dc8502899a59a XMM02=ec2efd57dc4c00df000000000011dbe8 XMM03=a413e52b35fef352000000000011dcb8 XMM04=ad60085dbc13ba5600000000000ae988 XMM05=19e9129bd510f23500000000001345b8 XMM06=445e27d0aeced4590000000000133420 XMM07=e042d86d42eb936e0000000000124cb8 XMM08=a413e52b35fef352000000000011dcb8 XMM09=00000000000000000000000000000000 XMM10=20202020002020202020000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000