syzkaller login: [ 30.338759] BUG: Bad rss-counter state mm:00000000ecb436eb type:MM_FILEPAGES val:33 [ 30.340054] BUG: Bad rss-counter state mm:00000000ecb436eb type:MM_ANONPAGES val:22 [ 30.375549] ================================================================== [ 30.376483] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.377424] Read of size 8 at addr ffff88800e2d63f8 by task sshd/220 [ 30.378195] [ 30.378410] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.379335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.380310] Call Trace: [ 30.380642] [ 30.380932] dump_stack_lvl+0x91/0xf0 [ 30.381422] print_report+0xcc/0x620 [ 30.381904] ? __virt_addr_valid+0x102/0x340 [ 30.382473] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.383087] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.383736] kasan_report+0xbe/0xf0 [ 30.384220] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.384839] vma_interval_tree_remove+0xc75/0xec0 [ 30.385439] vma_prepare+0xc54/0x11a0 [ 30.385921] __split_vma+0x5af/0x950 [ 30.386411] ? __pfx___split_vma+0x10/0x10 [ 30.386951] ? find_held_lock+0x2c/0x110 [ 30.387472] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.388051] ? lock_is_held_type+0x9f/0x120 [ 30.388608] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.389229] ? mtree_range_walk+0x632/0x900 [ 30.389792] ? mas_walk+0x5c7/0x7c0 [ 30.390283] do_vmi_munmap+0x1f1/0x2b0 [ 30.390788] mmap_region+0x1f9/0x2660 [ 30.391281] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.391817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.392550] ? __pfx_lock_acquire+0x10/0x10 [ 30.393088] ? __pfx_mmap_region+0x10/0x10 [ 30.393618] ? security_mmap_addr+0x7d/0xa0 [ 30.394156] ? get_unmapped_area+0x1f5/0x3f0 [ 30.394714] do_mmap+0x854/0xf00 [ 30.395158] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.395656] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.396242] ksys_mmap_pgoff+0x3af/0x500 [ 30.396754] do_syscall_64+0x3f/0x90 [ 30.397249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.397901] RIP: 0033:0x7f6de7e3ed82 [ 30.398363] 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 [ 30.400544] RSP: 002b:00007fffb4261b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.401473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6de7e3ed82 [ 30.402339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6de7278000 [ 30.403193] RBP: 00007f6de7278000 R08: 0000000000000009 R09: 0000000000001000 [ 30.404090] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b388e6bf70 [ 30.404958] R13: 00007fffb4261ba0 R14: 00007fffb4261bd0 R15: 00007fffb4261f30 [ 30.405821] [ 30.406122] [ 30.406337] Allocated by task 213: [ 30.406768] kasan_save_stack+0x22/0x50 [ 30.407271] kasan_set_track+0x25/0x30 [ 30.407787] __kasan_slab_alloc+0x59/0x70 [ 30.408313] kmem_cache_alloc+0x16b/0x370 [ 30.408837] vm_area_dup+0x20/0x160 [ 30.409290] __split_vma+0x170/0x950 [ 30.409758] split_vma+0xc6/0x110 [ 30.410207] mprotect_fixup+0x8d2/0xb30 [ 30.410709] do_mprotect_pkey+0x87e/0xd40 [ 30.411237] __x64_sys_mprotect+0x78/0xc0 [ 30.411766] do_syscall_64+0x3f/0x90 [ 30.412256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.412920] [ 30.413138] Freed by task 213: [ 30.413537] kasan_save_stack+0x22/0x50 [ 30.414059] kasan_set_track+0x25/0x30 [ 30.414551] kasan_save_free_info+0x2b/0x50 [ 30.415091] __kasan_slab_free+0x10a/0x190 [ 30.415624] kmem_cache_free+0x10d/0x4d0 [ 30.416155] rcu_core+0x8c8/0x2860 [ 30.416606] __do_softirq+0x1b7/0x7d4 [ 30.417105] [ 30.417333] Last potentially related work creation: [ 30.417941] kasan_save_stack+0x22/0x50 [ 30.418461] __kasan_record_aux_stack+0x8e/0xa0 [ 30.419052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.419718] remove_vma+0x139/0x170 [ 30.420178] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.420744] do_vmi_munmap+0x1f1/0x2b0 [ 30.421229] __vm_munmap+0x138/0x3a0 [ 30.421701] __x64_sys_munmap+0x59/0x80 [ 30.422214] do_syscall_64+0x3f/0x90 [ 30.422706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.423347] [ 30.423564] The buggy address belongs to the object at ffff88800e2d63a0 [ 30.423564] which belongs to the cache vm_area_struct of size 168 [ 30.425063] The buggy address is located 88 bytes inside of [ 30.425063] freed 168-byte region [ffff88800e2d63a0, ffff88800e2d6448) [ 30.426487] [ 30.426706] The buggy address belongs to the physical page: [ 30.427365] page:00000000e6f5d6df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2d6 [ 30.428492] memcg:ffff88800ddebb01 [ 30.428929] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.429635] page_type: 0xffffffff() [ 30.430088] raw: 0100000000000200 ffff8880087a0c80 ffffea0000367300 dead000000000005 [ 30.431032] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddebb01 [ 30.431975] page dumped because: kasan: bad access detected [ 30.432646] [ 30.432865] Memory state around the buggy address: [ 30.433468] ffff88800e2d6280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.434334] ffff88800e2d6300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.435191] >ffff88800e2d6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.436050] ^ [ 30.436883] ffff88800e2d6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.437740] ffff88800e2d6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.438599] ================================================================== [ 30.439649] Disabling lock debugging due to kernel taint [ 32.360290] BUG: Bad rss-counter state mm:00000000f1528f57 type:MM_FILEPAGES val:33 [ 32.361315] BUG: Bad rss-counter state mm:00000000f1528f57 type:MM_ANONPAGES val:22 [ 32.841073] BUG: Bad rss-counter state mm:000000007593e637 type:MM_FILEPAGES val:33 [ 32.842782] BUG: Bad rss-counter state mm:000000007593e637 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61326' (ECDSA) to the list of known hosts. 2023/06/20 14:01:25 fuzzer started 2023/06/20 14:01:25 dialing manager at localhost:36067 2023/06/20 14:01:25 checking machine... 2023/06/20 14:01:25 checking revisions... [ 33.600733] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:01:25 testing simple program... [ 33.647640] cgroup: Unknown subsys name 'net' [ 33.793262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:01:25 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=00007f6fd9240c08 CR3=00000000165f2000 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=2034323a31303a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31303a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800f6d7ad8 RSP=ffff88800f6d79c0 R8 =ffffffff86098096 R9 =ffff88800f6d7ac0 R10=0000000000038001 R11=0000000000006097 R12=ffff88800f6d7ae0 R13=ffff88800f6d7ac8 R14=ffff88800f6d7a80 R15=ffff88800f6d7a80 RIP=ffffffff81131153 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 00007fcb35641900 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=00007ffdcc0fc000 CR3=0000000012d6a000 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