syzkaller login: [ 49.365564] BUG: Bad rss-counter state mm:00000000b33e52f5 type:MM_FILEPAGES val:33 [ 49.366769] BUG: Bad rss-counter state mm:00000000b33e52f5 type:MM_ANONPAGES val:22 [ 49.484312] ================================================================== [ 49.485025] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.485747] Read of size 8 at addr ffff88800eddea50 by task sshd/220 [ 49.486330] [ 49.486500] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.487156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.487897] Call Trace: [ 49.488242] [ 49.488459] dump_stack_lvl+0x91/0xf0 [ 49.488835] print_report+0xcc/0x620 [ 49.489215] ? __virt_addr_valid+0x102/0x340 [ 49.489639] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.490113] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.490603] kasan_report+0xbe/0xf0 [ 49.490942] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.491381] vma_interval_tree_remove+0xc75/0xec0 [ 49.491813] vma_prepare+0xc54/0x11a0 [ 49.492152] __split_vma+0x5af/0x950 [ 49.492495] ? __pfx___split_vma+0x10/0x10 [ 49.492877] ? find_held_lock+0x2c/0x110 [ 49.493267] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.493672] ? lock_is_held_type+0x9f/0x120 [ 49.494058] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.494493] ? mtree_range_walk+0x632/0x900 [ 49.494888] ? mas_walk+0x5c7/0x7c0 [ 49.495235] do_vmi_munmap+0x1f1/0x2b0 [ 49.495587] mmap_region+0x1f9/0x2660 [ 49.495928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.496293] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.496801] ? __pfx_lock_acquire+0x10/0x10 [ 49.497187] ? __pfx_mmap_region+0x10/0x10 [ 49.497565] ? security_mmap_addr+0x7d/0xa0 [ 49.497945] ? get_unmapped_area+0x1f5/0x3f0 [ 49.498337] do_mmap+0x854/0xf00 [ 49.498654] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.499009] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.499409] ksys_mmap_pgoff+0x3af/0x500 [ 49.499773] do_syscall_64+0x3f/0x90 [ 49.500113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.500576] RIP: 0033:0x7f7874eabd82 [ 49.500928] 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 [ 49.502454] RSP: 002b:00007ffd25848288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.503104] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7874eabd82 [ 49.503714] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78742e5000 [ 49.504316] RBP: 00007f78742e5000 R08: 0000000000000009 R09: 0000000000001000 [ 49.504936] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d3956fec0 [ 49.505548] R13: 00007ffd258482a0 R14: 00007ffd258482d0 R15: 00007ffd25848630 [ 49.506160] [ 49.506367] [ 49.506521] Allocated by task 213: [ 49.506829] kasan_save_stack+0x22/0x50 [ 49.507196] kasan_set_track+0x25/0x30 [ 49.507559] __kasan_slab_alloc+0x59/0x70 [ 49.507938] kmem_cache_alloc+0x16b/0x370 [ 49.508311] vm_area_dup+0x20/0x160 [ 49.508644] __split_vma+0x170/0x950 [ 49.508983] split_vma+0xc6/0x110 [ 49.509305] mprotect_fixup+0x8d2/0xb30 [ 49.509667] do_mprotect_pkey+0x87e/0xd40 [ 49.510047] __x64_sys_mprotect+0x78/0xc0 [ 49.510428] do_syscall_64+0x3f/0x90 [ 49.510772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.511231] [ 49.511384] Freed by task 213: [ 49.511665] kasan_save_stack+0x22/0x50 [ 49.512033] kasan_set_track+0x25/0x30 [ 49.512389] kasan_save_free_info+0x2b/0x50 [ 49.512769] __kasan_slab_free+0x10a/0x190 [ 49.513175] kmem_cache_free+0x10d/0x4d0 [ 49.513543] rcu_core+0x8c8/0x2860 [ 49.513863] __do_softirq+0x1b7/0x7d4 [ 49.514208] [ 49.514360] Last potentially related work creation: [ 49.514775] kasan_save_stack+0x22/0x50 [ 49.515129] __kasan_record_aux_stack+0x8e/0xa0 [ 49.515541] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.516003] remove_vma+0x139/0x170 [ 49.516327] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.516726] do_vmi_munmap+0x1f1/0x2b0 [ 49.517077] __vm_munmap+0x138/0x3a0 [ 49.517407] __x64_sys_munmap+0x59/0x80 [ 49.517759] do_syscall_64+0x3f/0x90 [ 49.518094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.518554] [ 49.518704] The buggy address belongs to the object at ffff88800edde9f8 [ 49.518704] which belongs to the cache vm_area_struct of size 168 [ 49.519745] The buggy address is located 88 bytes inside of [ 49.519745] freed 168-byte region [ffff88800edde9f8, ffff88800eddeaa0) [ 49.520740] [ 49.520899] The buggy address belongs to the physical page: [ 49.521366] page:00000000f57c07bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedde [ 49.522133] memcg:ffff8880168d0001 [ 49.522438] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.522893] page_type: 0xffffffff() [ 49.523211] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.523863] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168d0001 [ 49.524508] page dumped because: kasan: bad access detected [ 49.524986] [ 49.525137] Memory state around the buggy address: [ 49.525552] ffff88800edde900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.526141] ffff88800edde980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 49.526729] >ffff88800eddea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.527309] ^ [ 49.527789] ffff88800eddea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 49.528370] ffff88800eddeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.528954] ================================================================== [ 49.529636] Disabling lock debugging due to kernel taint [ 50.849550] BUG: Bad rss-counter state mm:00000000ee516848 type:MM_FILEPAGES val:33 [ 50.850614] BUG: Bad rss-counter state mm:00000000ee516848 type:MM_ANONPAGES val:22 [ 51.292479] BUG: Bad rss-counter state mm:00000000541dc645 type:MM_FILEPAGES val:33 [ 51.293660] BUG: Bad rss-counter state mm:00000000541dc645 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55644' (ECDSA) to the list of known hosts. 2023/06/20 09:16:40 fuzzer started 2023/06/20 09:16:40 dialing manager at localhost:44161 2023/06/20 09:16:40 checking machine... 2023/06/20 09:16:40 checking revisions... [ 51.980790] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:16:40 testing simple program... [ 52.029766] cgroup: Unknown subsys name 'net' [ 52.067720] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:16:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffff88806ce09b10 RDX=1ffff1100d9c1359 RSI=ffffffff813ad6d0 RDI=ffff88806ce09b38 RBP=ffff88806ce09b08 RSP=ffff88806ce09a60 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b38 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800da87a80 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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 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=00007f3363d0abd0 CR3=000000000cc78000 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=74b619be1b48c6b60a41f564b4fe0bb4 XMM02=000000000011ea80eff9b2d0a8fce9cb XMM03=000000000011eb502c67c8bc2e329bc3 XMM04=6064e6b5fdf070bf00000000000ae988 XMM05=0d7d11b8af051f2f00000000001356f0 XMM06=c291bd5c70af25b90000000000134420 XMM07=e042d86d42eb936e0000000000124fd0 XMM08=f59341dba5502026000000000011eb50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800e008c00 RBX=ffff88806cf3e0d0 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8180a641 RDI=ffff88800e008e00 RBP=ffff8880084c6140 RSP=ffff88801428f3d8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000282 R12=ffff88801a36d610 R13=0000000000000004 R14=ffff88801a36d630 R15=0000000000000004 RIP=ffffffff8180a561 RFL=00000086 [--S--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 00007ff79505b900 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=00007ff79503a020 CR3=000000000ec50000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000