syzkaller login: [ 67.341093] BUG: Bad rss-counter state mm:00000000977731bf type:MM_FILEPAGES val:33 [ 67.341916] BUG: Bad rss-counter state mm:00000000977731bf type:MM_ANONPAGES val:22 [ 67.474059] ================================================================== [ 67.474778] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.475445] Read of size 8 at addr ffff8880167ad3f8 by task sshd/218 [ 67.475993] [ 67.476153] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 67.476939] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.477661] Call Trace: [ 67.478028] [ 67.478261] dump_stack_lvl+0x91/0xf0 [ 67.478614] print_report+0xcc/0x620 [ 67.478973] ? __virt_addr_valid+0x102/0x340 [ 67.479381] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.479824] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.480276] kasan_report+0xbe/0xf0 [ 67.480605] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.481066] vma_interval_tree_remove+0xc75/0xec0 [ 67.481497] vma_prepare+0xc54/0x11a0 [ 67.481859] __split_vma+0x5af/0x950 [ 67.482185] ? __pfx___split_vma+0x10/0x10 [ 67.482580] ? find_held_lock+0x2c/0x110 [ 67.482960] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.483370] ? lock_is_held_type+0x9f/0x120 [ 67.483771] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.484221] ? mtree_range_walk+0x632/0x900 [ 67.484624] ? mas_walk+0x5c7/0x7c0 [ 67.485038] do_vmi_munmap+0x1f1/0x2b0 [ 67.485406] mmap_region+0x1f9/0x2660 [ 67.485758] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.486137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.486653] ? __pfx_lock_acquire+0x10/0x10 [ 67.487045] ? __pfx_mmap_region+0x10/0x10 [ 67.487431] ? security_mmap_addr+0x7d/0xa0 [ 67.487815] ? get_unmapped_area+0x1f5/0x3f0 [ 67.488206] do_mmap+0x854/0xf00 [ 67.488532] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.488910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.489335] ksys_mmap_pgoff+0x3af/0x500 [ 67.489708] do_syscall_64+0x3f/0x90 [ 67.490065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.490535] RIP: 0033:0x7fd3f40bdd82 [ 67.490875] 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 [ 67.492408] RSP: 002b:00007ffe62f4ce68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.497089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3f40bdd82 [ 67.497575] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3f34f7000 [ 67.498057] RBP: 00007fd3f34f7000 R08: 0000000000000009 R09: 0000000000001000 [ 67.498539] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f4e32ef70 [ 67.499025] R13: 00007ffe62f4ce80 R14: 00007ffe62f4ceb0 R15: 00007ffe62f4d210 [ 67.499514] [ 67.499679] [ 67.499817] Allocated by task 211: [ 67.500068] kasan_save_stack+0x22/0x50 [ 67.500362] kasan_set_track+0x25/0x30 [ 67.500638] __kasan_slab_alloc+0x59/0x70 [ 67.500956] kmem_cache_alloc+0x16b/0x370 [ 67.501250] vm_area_dup+0x20/0x160 [ 67.501507] __split_vma+0x170/0x950 [ 67.501775] split_vma+0xc6/0x110 [ 67.502031] mprotect_fixup+0x8d2/0xb30 [ 67.502317] do_mprotect_pkey+0x87e/0xd40 [ 67.502614] __x64_sys_mprotect+0x78/0xc0 [ 67.502908] do_syscall_64+0x3f/0x90 [ 67.503179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.503544] [ 67.503665] Freed by task 211: [ 67.503892] kasan_save_stack+0x22/0x50 [ 67.504185] kasan_set_track+0x25/0x30 [ 67.504463] kasan_save_free_info+0x2b/0x50 [ 67.504769] __kasan_slab_free+0x10a/0x190 [ 67.505188] kmem_cache_free+0x10d/0x4d0 [ 67.505540] rcu_core+0x8c8/0x2860 [ 67.505859] __do_softirq+0x1b7/0x7d4 [ 67.506205] [ 67.506361] Last potentially related work creation: [ 67.506789] kasan_save_stack+0x22/0x50 [ 67.507151] __kasan_record_aux_stack+0x8e/0xa0 [ 67.507565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.508045] remove_vma+0x139/0x170 [ 67.508374] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.508778] do_vmi_munmap+0x1f1/0x2b0 [ 67.509187] __vm_munmap+0x138/0x3a0 [ 67.509531] __x64_sys_munmap+0x59/0x80 [ 67.509890] do_syscall_64+0x3f/0x90 [ 67.510230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.510696] [ 67.510852] Second to last potentially related work creation: [ 67.511461] kasan_save_stack+0x22/0x50 [ 67.511822] __kasan_record_aux_stack+0x8e/0xa0 [ 67.512231] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.512686] remove_vma+0x139/0x170 [ 67.513034] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.513424] do_vmi_munmap+0x1f1/0x2b0 [ 67.513760] mmap_region+0x1f9/0x2660 [ 67.514100] do_mmap+0x854/0xf00 [ 67.514401] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.514744] ksys_mmap_pgoff+0x3af/0x500 [ 67.515103] do_syscall_64+0x3f/0x90 [ 67.515440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.515890] [ 67.516044] The buggy address belongs to the object at ffff8880167ad3a0 [ 67.516044] which belongs to the cache vm_area_struct of size 168 [ 67.517088] The buggy address is located 88 bytes inside of [ 67.517088] freed 168-byte region [ffff8880167ad3a0, ffff8880167ad448) [ 67.518061] [ 67.518211] The buggy address belongs to the physical page: [ 67.518675] page:000000002bd3dc3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167ad [ 67.519460] memcg:ffff888015a25301 [ 67.519758] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.520212] page_type: 0xffffffff() [ 67.520520] raw: 0100000000000200 ffff88800879fc80 ffffea00003bca80 dead00000000000a [ 67.521192] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a25301 [ 67.521838] page dumped because: kasan: bad access detected [ 67.522290] [ 67.522445] Memory state around the buggy address: [ 67.522853] ffff8880167ad280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 67.523452] ffff8880167ad300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 67.524032] >ffff8880167ad380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 67.524579] ^ [ 67.525145] ffff8880167ad400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 67.525740] ffff8880167ad480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.526367] ================================================================== [ 67.527099] Disabling lock debugging due to kernel taint [ 69.024981] BUG: Bad rss-counter state mm:00000000424f019b type:MM_FILEPAGES val:33 [ 69.025755] BUG: Bad rss-counter state mm:00000000424f019b type:MM_ANONPAGES val:22 [ 69.382123] BUG: Bad rss-counter state mm:0000000039e323d5 type:MM_FILEPAGES val:32 [ 69.382805] BUG: Bad rss-counter state mm:0000000039e323d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4828' (ECDSA) to the list of known hosts. 2023/06/20 09:07:15 fuzzer started 2023/06/20 09:07:15 dialing manager at localhost:44161 2023/06/20 09:07:15 checking machine... 2023/06/20 09:07:15 checking revisions... [ 69.990477] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:07:16 testing simple program... [ 70.031498] cgroup: Unknown subsys name 'net' [ 70.065318] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:06:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f86e93c7610 CR3=000000000f7aa000 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=2035313a37303a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a37303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e1383 RSI=ffffffff8460144a RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a88 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff8880183c51c0 R15=ffff88800d431080 RIP=ffffffff811305e0 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 00007f17efe23900 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=00007f17efe02020 CR3=000000000e602000 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