syzkaller login: [ 45.616167] BUG: Bad rss-counter state mm:000000003d9c9435 type:MM_FILEPAGES val:33 [ 45.617728] BUG: Bad rss-counter state mm:000000003d9c9435 type:MM_ANONPAGES val:22 [ 45.772253] ================================================================== [ 45.773426] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.774645] Read of size 8 at addr ffff88800e0f7968 by task sshd/219 [ 45.775454] [ 45.775683] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.776609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.777655] Call Trace: [ 45.777999] [ 45.778299] dump_stack_lvl+0x91/0xf0 [ 45.778812] print_report+0xcc/0x620 [ 45.779332] ? __virt_addr_valid+0x102/0x340 [ 45.779918] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.780573] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.781217] kasan_report+0xbe/0xf0 [ 45.781734] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.782387] vma_interval_tree_remove+0xc75/0xec0 [ 45.783018] vma_prepare+0xc54/0x11a0 [ 45.783519] __split_vma+0x5af/0x950 [ 45.784017] ? __pfx___split_vma+0x10/0x10 [ 45.784575] ? find_held_lock+0x2c/0x110 [ 45.785125] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.785740] ? lock_is_held_type+0x9f/0x120 [ 45.786311] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.786948] ? mtree_range_walk+0x632/0x900 [ 45.787534] ? mas_walk+0x5c7/0x7c0 [ 45.788037] do_vmi_munmap+0x1f1/0x2b0 [ 45.788560] mmap_region+0x1f9/0x2660 [ 45.789069] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.789623] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.790380] ? __pfx_lock_acquire+0x10/0x10 [ 45.790943] ? __pfx_mmap_region+0x10/0x10 [ 45.791513] ? security_mmap_addr+0x7d/0xa0 [ 45.792070] ? get_unmapped_area+0x1f5/0x3f0 [ 45.792649] do_mmap+0x854/0xf00 [ 45.793113] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.793656] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.794252] ksys_mmap_pgoff+0x3af/0x500 [ 45.794789] do_syscall_64+0x3f/0x90 [ 45.795294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.795979] RIP: 0033:0x7f6067966d82 [ 45.796461] 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 [ 45.798713] RSP: 002b:00007fff8b119078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.799659] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6067966d82 [ 45.800540] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6066da0000 [ 45.801431] RBP: 00007f6066da0000 R08: 0000000000000009 R09: 0000000000001000 [ 45.802337] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e06b4ef70 [ 45.803231] R13: 00007fff8b119090 R14: 00007fff8b1190c0 R15: 00007fff8b119420 [ 45.804131] [ 45.804435] [ 45.804658] Allocated by task 212: [ 45.805115] kasan_save_stack+0x22/0x50 [ 45.805670] kasan_set_track+0x25/0x30 [ 45.806192] __kasan_slab_alloc+0x59/0x70 [ 45.806744] kmem_cache_alloc+0x16b/0x370 [ 45.807291] vm_area_dup+0x20/0x160 [ 45.807764] __split_vma+0x170/0x950 [ 45.808250] split_vma+0xc6/0x110 [ 45.808705] mprotect_fixup+0x8d2/0xb30 [ 45.809228] do_mprotect_pkey+0x87e/0xd40 [ 45.809784] __x64_sys_mprotect+0x78/0xc0 [ 45.810333] do_syscall_64+0x3f/0x90 [ 45.810837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.811516] [ 45.811745] Freed by task 212: [ 45.812167] kasan_save_stack+0x22/0x50 [ 45.812690] kasan_set_track+0x25/0x30 [ 45.813208] kasan_save_free_info+0x2b/0x50 [ 45.813777] __kasan_slab_free+0x10a/0x190 [ 45.814359] kmem_cache_free+0x10d/0x4d0 [ 45.814896] rcu_core+0x8c8/0x2860 [ 45.815456] __do_softirq+0x1b7/0x7d4 [ 45.815955] [ 45.816182] Last potentially related work creation: [ 45.816802] kasan_save_stack+0x22/0x50 [ 45.817364] __kasan_record_aux_stack+0x8e/0xa0 [ 45.817990] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.818683] remove_vma+0x139/0x170 [ 45.819170] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.819774] do_vmi_munmap+0x1f1/0x2b0 [ 45.820306] __vm_munmap+0x138/0x3a0 [ 45.820814] __x64_sys_munmap+0x59/0x80 [ 45.821351] do_syscall_64+0x3f/0x90 [ 45.821881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.822571] [ 45.822806] The buggy address belongs to the object at ffff88800e0f7910 [ 45.822806] which belongs to the cache vm_area_struct of size 168 [ 45.824396] The buggy address is located 88 bytes inside of [ 45.824396] freed 168-byte region [ffff88800e0f7910, ffff88800e0f79b8) [ 45.825934] [ 45.826167] The buggy address belongs to the physical page: [ 45.826864] page:000000000a71dae2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0f7 [ 45.828021] memcg:ffff888015d8b401 [ 45.828480] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.829176] page_type: 0xffffffff() [ 45.829670] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.830637] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d8b401 [ 45.831597] page dumped because: kasan: bad access detected [ 45.832302] [ 45.832530] Memory state around the buggy address: [ 45.833146] ffff88800e0f7800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 45.834057] ffff88800e0f7880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 45.834964] >ffff88800e0f7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.835881] ^ [ 45.836696] ffff88800e0f7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 45.837685] ffff88800e0f7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.838581] ================================================================== [ 45.839576] Disabling lock debugging due to kernel taint [ 47.957082] BUG: Bad rss-counter state mm:0000000097afe6c0 type:MM_FILEPAGES val:33 [ 47.958417] BUG: Bad rss-counter state mm:0000000097afe6c0 type:MM_ANONPAGES val:22 [ 48.386073] BUG: Bad rss-counter state mm:00000000440bf4f9 type:MM_FILEPAGES val:33 [ 48.387133] BUG: Bad rss-counter state mm:00000000440bf4f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21216' (ECDSA) to the list of known hosts. 2023/06/20 10:03:19 fuzzer started 2023/06/20 10:03:19 dialing manager at localhost:44161 2023/06/20 10:03:19 checking machine... 2023/06/20 10:03:19 checking revisions... [ 49.116702] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:03:19 testing simple program... [ 49.149402] cgroup: Unknown subsys name 'net' [ 49.208986] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:02:57 Registers: info registers vcpu 0 RAX=ffffffff81808268 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff8880146cf6a0 RDI=ffffffff81808268 RBP=ffff88806ce09af0 RSP=ffff88806ce09a88 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020dd4 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880146d0000 R15=ffff88800d1c6a00 RIP=ffffffff811303b9 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 00007f5dc7805900 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=00007f5dc6d25008 CR3=000000000c688000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=92ff8d12d916984200000000000ae988 XMM05=b5dc3174b824b6bb0000000000134d58 XMM06=dfcdbad4f1609c370000000000133880 XMM07=fb795ef6d65770560000000000123d08 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff88806cf09dc8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000287 R13=ffff88801a3883d8 R14=ffffffff813782a8 R15=ffff88801a3c8228 RIP=ffffffff8135b930 RFL=00000082 [--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 00007fa4e35a2900 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=00007fff1b4fe000 CR3=000000000e344000 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