syzkaller login: [ 31.129500] BUG: Bad rss-counter state mm:000000003b72fa5a type:MM_FILEPAGES val:33 [ 31.130905] BUG: Bad rss-counter state mm:000000003b72fa5a type:MM_ANONPAGES val:22 [ 31.288572] ================================================================== [ 31.289575] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.290567] Read of size 8 at addr ffff88800e3db880 by task sshd/220 [ 31.291528] [ 31.291763] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.292682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.293742] Call Trace: [ 31.294079] [ 31.294384] dump_stack_lvl+0x91/0xf0 [ 31.294903] print_report+0xcc/0x620 [ 31.295434] ? __virt_addr_valid+0x102/0x340 [ 31.296016] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.296677] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.297331] kasan_report+0xbe/0xf0 [ 31.297841] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.298503] vma_interval_tree_remove+0xc75/0xec0 [ 31.299156] vma_prepare+0xc54/0x11a0 [ 31.299672] __split_vma+0x5af/0x950 [ 31.300177] ? __pfx___split_vma+0x10/0x10 [ 31.300744] ? find_held_lock+0x2c/0x110 [ 31.301299] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.301904] ? lock_is_held_type+0x9f/0x120 [ 31.302475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.303145] ? mtree_range_walk+0x632/0x900 [ 31.303734] ? mas_walk+0x5c7/0x7c0 [ 31.304237] do_vmi_munmap+0x1f1/0x2b0 [ 31.304759] mmap_region+0x1f9/0x2660 [ 31.305276] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.305818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.306574] ? __pfx_lock_acquire+0x10/0x10 [ 31.307152] ? __pfx_mmap_region+0x10/0x10 [ 31.307712] ? security_mmap_addr+0x7d/0xa0 [ 31.308277] ? get_unmapped_area+0x1f5/0x3f0 [ 31.308865] do_mmap+0x854/0xf00 [ 31.309333] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.309862] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.310477] ksys_mmap_pgoff+0x3af/0x500 [ 31.311075] do_syscall_64+0x3f/0x90 [ 31.311617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.312326] RIP: 0033:0x7f764d7f0d82 [ 31.312827] 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 [ 31.315161] RSP: 002b:00007fff8f635c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.316152] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f764d7f0d82 [ 31.317083] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f764cc2a000 [ 31.318014] RBP: 00007f764cc2a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.318960] R10: 0000000000000812 R11: 0000000000000206 R12: 000056310aa5eb20 [ 31.319866] R13: 00007fff8f635c90 R14: 00007fff8f635cc0 R15: 00007fff8f636020 [ 31.320774] [ 31.321086] [ 31.321313] Allocated by task 213: [ 31.321768] kasan_save_stack+0x22/0x50 [ 31.322306] kasan_set_track+0x25/0x30 [ 31.322834] __kasan_slab_alloc+0x59/0x70 [ 31.323414] kmem_cache_alloc+0x16b/0x370 [ 31.323964] vm_area_dup+0x20/0x160 [ 31.324450] __split_vma+0x170/0x950 [ 31.324953] split_vma+0xc6/0x110 [ 31.325424] mprotect_fixup+0x8d2/0xb30 [ 31.325957] do_mprotect_pkey+0x87e/0xd40 [ 31.326509] __x64_sys_mprotect+0x78/0xc0 [ 31.327074] do_syscall_64+0x3f/0x90 [ 31.327581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.328260] [ 31.328488] Freed by task 13: [ 31.328894] kasan_save_stack+0x22/0x50 [ 31.329428] kasan_set_track+0x25/0x30 [ 31.329954] kasan_save_free_info+0x2b/0x50 [ 31.330521] __kasan_slab_free+0x10a/0x190 [ 31.331104] kmem_cache_free+0x10d/0x4d0 [ 31.331650] rcu_core+0x8c8/0x2860 [ 31.332125] __do_softirq+0x1b7/0x7d4 [ 31.332643] [ 31.332896] Last potentially related work creation: [ 31.333514] kasan_save_stack+0x22/0x50 [ 31.334050] __kasan_record_aux_stack+0x8e/0xa0 [ 31.334654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.335351] remove_vma+0x139/0x170 [ 31.335828] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.336419] do_vmi_munmap+0x1f1/0x2b0 [ 31.336939] __vm_munmap+0x138/0x3a0 [ 31.337433] __x64_sys_munmap+0x59/0x80 [ 31.337960] do_syscall_64+0x3f/0x90 [ 31.338468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.339207] [ 31.339441] Second to last potentially related work creation: [ 31.340168] kasan_save_stack+0x22/0x50 [ 31.340708] __kasan_record_aux_stack+0x8e/0xa0 [ 31.341325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.342017] remove_vma+0x139/0x170 [ 31.342518] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.343122] do_vmi_munmap+0x1f1/0x2b0 [ 31.343647] mmap_region+0x1f9/0x2660 [ 31.344165] do_mmap+0x854/0xf00 [ 31.344628] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.345155] ksys_mmap_pgoff+0x7d/0x500 [ 31.345686] do_syscall_64+0x3f/0x90 [ 31.346194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.346875] [ 31.347124] The buggy address belongs to the object at ffff88800e3db828 [ 31.347124] which belongs to the cache vm_area_struct of size 168 [ 31.348695] The buggy address is located 88 bytes inside of [ 31.348695] freed 168-byte region [ffff88800e3db828, ffff88800e3db8d0) [ 31.350185] [ 31.350415] The buggy address belongs to the physical page: [ 31.351118] page:000000007afd523b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3db [ 31.352258] memcg:ffff8880159d9f01 [ 31.352711] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.353402] page_type: 0xffffffff() [ 31.353883] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.354856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159d9f01 [ 31.355836] page dumped because: kasan: bad access detected [ 31.356535] [ 31.356771] Memory state around the buggy address: [ 31.357394] ffff88800e3db780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.358297] ffff88800e3db800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.359205] >ffff88800e3db880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.360108] ^ [ 31.360544] ffff88800e3db900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.361451] ffff88800e3db980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.362351] ================================================================== [ 31.363439] Disabling lock debugging due to kernel taint [ 33.406998] BUG: Bad rss-counter state mm:00000000e89abe23 type:MM_FILEPAGES val:33 [ 33.408069] BUG: Bad rss-counter state mm:00000000e89abe23 type:MM_ANONPAGES val:22 [ 33.872407] BUG: Bad rss-counter state mm:00000000a249f6ec type:MM_FILEPAGES val:33 [ 33.873598] BUG: Bad rss-counter state mm:00000000a249f6ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10166' (ECDSA) to the list of known hosts. 2023/06/19 21:32:21 fuzzer started 2023/06/19 21:32:21 dialing manager at localhost:44161 2023/06/19 21:32:22 checking machine... 2023/06/19 21:32:22 checking revisions... [ 34.587992] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:32:22 testing simple program... [ 34.640906] cgroup: Unknown subsys name 'net' [ 34.680668] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:32:21 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88801910a8d0 RCX=0000000000000001 RDX=0000000000000cc0 RSI=ffff88800c5ba780 RDI=ffff8880087b6500 RBP=ffff8880087b6500 RSP=ffff888019867c68 R8 =ffff888019867cd0 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800c5ba780 R13=0000000000000000 R14=ffff888019867cd0 R15=0000000000000cc0 RIP=ffffffff81803b8d RFL=00000202 [-------] 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 00007f475e75b900 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=00007ffd67810000 CR3=000000000e5aa000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f14988bcc78 CR3=00000000168e4000 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=2031323a32333a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a32333a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000