syzkaller login: [ 30.609174] BUG: Bad rss-counter state mm:0000000077ab711d type:MM_FILEPAGES val:33 [ 30.610781] BUG: Bad rss-counter state mm:0000000077ab711d type:MM_ANONPAGES val:22 [ 30.776064] ================================================================== [ 30.777038] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.778052] Read of size 8 at addr ffff88800d8f9880 by task sshd/221 [ 30.779028] [ 30.779263] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.780209] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.781289] Call Trace: [ 30.781638] [ 30.781947] dump_stack_lvl+0x91/0xf0 [ 30.782470] print_report+0xcc/0x620 [ 30.782991] ? __virt_addr_valid+0x102/0x340 [ 30.783580] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784261] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784927] kasan_report+0xbe/0xf0 [ 30.785438] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.786111] vma_interval_tree_remove+0xc75/0xec0 [ 30.786785] vma_prepare+0xc54/0x11a0 [ 30.787318] __split_vma+0x5af/0x950 [ 30.787851] ? __pfx___split_vma+0x10/0x10 [ 30.788438] ? find_held_lock+0x2c/0x110 [ 30.789015] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.789643] ? lock_is_held_type+0x9f/0x120 [ 30.790247] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.790917] ? mtree_range_walk+0x632/0x900 [ 30.791535] ? mas_walk+0x5c7/0x7c0 [ 30.792082] do_vmi_munmap+0x1f1/0x2b0 [ 30.792626] mmap_region+0x1f9/0x2660 [ 30.793161] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.793726] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.794510] ? __pfx_lock_acquire+0x10/0x10 [ 30.795100] ? __pfx_mmap_region+0x10/0x10 [ 30.795696] ? security_mmap_addr+0x7d/0xa0 [ 30.796295] ? get_unmapped_area+0x1f5/0x3f0 [ 30.796904] do_mmap+0x854/0xf00 [ 30.797391] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.797936] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.798556] ksys_mmap_pgoff+0x3af/0x500 [ 30.799109] do_syscall_64+0x3f/0x90 [ 30.799616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800335] RIP: 0033:0x7f000b255d82 [ 30.800826] 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 [ 30.803091] RSP: 002b:00007ffed70a0818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.804072] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f000b255d82 [ 30.804968] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f000a68f000 [ 30.805862] RBP: 00007f000a68f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.806762] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b796e5ec0 [ 30.807679] R13: 00007ffed70a0830 R14: 00007ffed70a0860 R15: 00007ffed70a0bc0 [ 30.808585] [ 30.808897] [ 30.809124] Allocated by task 214: [ 30.809594] kasan_save_stack+0x22/0x50 [ 30.810145] kasan_set_track+0x25/0x30 [ 30.810682] __kasan_slab_alloc+0x59/0x70 [ 30.811254] kmem_cache_alloc+0x16b/0x370 [ 30.811822] vm_area_dup+0x20/0x160 [ 30.812321] __split_vma+0x170/0x950 [ 30.812822] split_vma+0xc6/0x110 [ 30.813305] mprotect_fixup+0x8d2/0xb30 [ 30.813845] do_mprotect_pkey+0x87e/0xd40 [ 30.814405] __x64_sys_mprotect+0x78/0xc0 [ 30.814966] do_syscall_64+0x3f/0x90 [ 30.815487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.816193] [ 30.816420] Freed by task 214: [ 30.816858] kasan_save_stack+0x22/0x50 [ 30.817402] kasan_set_track+0x25/0x30 [ 30.817929] kasan_save_free_info+0x2b/0x50 [ 30.818497] __kasan_slab_free+0x10a/0x190 [ 30.819061] kmem_cache_free+0x10d/0x4d0 [ 30.819700] rcu_core+0x8c8/0x2860 [ 30.820175] __do_softirq+0x1b7/0x7d4 [ 30.820677] [ 30.820904] Last potentially related work creation: [ 30.821529] kasan_save_stack+0x22/0x50 [ 30.822064] __kasan_record_aux_stack+0x8e/0xa0 [ 30.822668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.823363] remove_vma+0x139/0x170 [ 30.823850] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.824445] do_vmi_munmap+0x1f1/0x2b0 [ 30.824960] __vm_munmap+0x138/0x3a0 [ 30.825453] __x64_sys_munmap+0x59/0x80 [ 30.825976] do_syscall_64+0x3f/0x90 [ 30.826488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827182] [ 30.827411] The buggy address belongs to the object at ffff88800d8f9828 [ 30.827411] which belongs to the cache vm_area_struct of size 168 [ 30.829000] The buggy address is located 88 bytes inside of [ 30.829000] freed 168-byte region [ffff88800d8f9828, ffff88800d8f98d0) [ 30.830510] [ 30.830741] The buggy address belongs to the physical page: [ 30.831446] page:00000000f151e1e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8f9 [ 30.832619] memcg:ffff88800f166601 [ 30.833076] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.833800] page_type: 0xffffffff() [ 30.834312] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.835364] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f166601 [ 30.836416] page dumped because: kasan: bad access detected [ 30.837170] [ 30.837412] Memory state around the buggy address: [ 30.838077] ffff88800d8f9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.839031] ffff88800d8f9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.839987] >ffff88800d8f9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.840931] ^ [ 30.841388] ffff88800d8f9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.842339] ffff88800d8f9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.843283] ================================================================== [ 30.844414] Disabling lock debugging due to kernel taint [ 32.789539] BUG: Bad rss-counter state mm:00000000a3bbc2c8 type:MM_FILEPAGES val:33 [ 32.790686] BUG: Bad rss-counter state mm:00000000a3bbc2c8 type:MM_ANONPAGES val:22 [ 33.220893] BUG: Bad rss-counter state mm:000000009f05084d type:MM_FILEPAGES val:33 [ 33.222570] BUG: Bad rss-counter state mm:000000009f05084d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14815' (ECDSA) to the list of known hosts. 2023/06/20 16:46:21 fuzzer started 2023/06/20 16:46:21 dialing manager at localhost:36067 2023/06/20 16:46:21 checking machine... 2023/06/20 16:46:21 checking revisions... [ 33.942554] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:46:21 testing simple program... [ 33.986850] cgroup: Unknown subsys name 'net' [ 34.025425] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:46:21 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=00007ffd8c2b2b68 CR3=0000000008ed8000 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=2031323a36343a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a36343a3631203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b3571 RBX=0000000000000001 RCX=ffffffff863b356c RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c766ae RBP=ffff88801ca4f880 RSP=ffff88801ca4f7b8 R8 =ffffffff863b3570 R9 =ffff88801ca4f868 R10=0000000000038001 R11=000000000008a966 R12=ffff88801ca4f888 R13=ffff88801ca4f870 R14=ffff88801ca4f869 R15=ffff88801ca4f828 RIP=ffffffff81130aa4 RFL=00000212 [----A--] 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 00007f9e82d2b900 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=00007f9e832e2618 CR3=000000000f1c6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000