syzkaller login: [ 31.387466] BUG: Bad rss-counter state mm:00000000577df037 type:MM_FILEPAGES val:33 [ 31.388769] BUG: Bad rss-counter state mm:00000000577df037 type:MM_ANONPAGES val:22 [ 31.547698] ================================================================== [ 31.548708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.549689] Read of size 8 at addr ffff88800e48fb38 by task sshd/220 [ 31.550581] [ 31.550809] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.551727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.552772] Call Trace: [ 31.553110] [ 31.553411] dump_stack_lvl+0x91/0xf0 [ 31.553941] print_report+0xcc/0x620 [ 31.554453] ? __virt_addr_valid+0x102/0x340 [ 31.555036] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.555689] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.556381] kasan_report+0xbe/0xf0 [ 31.556879] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.557534] vma_interval_tree_remove+0xc75/0xec0 [ 31.558169] vma_prepare+0xc54/0x11a0 [ 31.558681] __split_vma+0x5af/0x950 [ 31.559179] ? __pfx___split_vma+0x10/0x10 [ 31.559740] ? find_held_lock+0x2c/0x110 [ 31.560291] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.560891] ? lock_is_held_type+0x9f/0x120 [ 31.561462] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.562106] ? mtree_range_walk+0x632/0x900 [ 31.562698] ? mas_walk+0x5c7/0x7c0 [ 31.563208] do_vmi_munmap+0x1f1/0x2b0 [ 31.563730] mmap_region+0x1f9/0x2660 [ 31.564259] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.564810] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.565571] ? __pfx_lock_acquire+0x10/0x10 [ 31.566135] ? __pfx_mmap_region+0x10/0x10 [ 31.566697] ? security_mmap_addr+0x7d/0xa0 [ 31.567268] ? get_unmapped_area+0x1f5/0x3f0 [ 31.567854] do_mmap+0x854/0xf00 [ 31.568331] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.568854] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.569457] ksys_mmap_pgoff+0x3af/0x500 [ 31.569992] do_syscall_64+0x3f/0x90 [ 31.570499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.571184] RIP: 0033:0x7fc0b063dd82 [ 31.571667] 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 [ 31.573944] RSP: 002b:00007ffe1f799e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.574911] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0b063dd82 [ 31.575810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0afa77000 [ 31.576712] RBP: 00007fc0afa77000 R08: 0000000000000009 R09: 0000000000001000 [ 31.577615] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558293187ec0 [ 31.578517] R13: 00007ffe1f799e60 R14: 00007ffe1f799e90 R15: 00007ffe1f79a1f0 [ 31.579441] [ 31.579754] [ 31.579984] Allocated by task 213: [ 31.580453] kasan_save_stack+0x22/0x50 [ 31.580997] kasan_set_track+0x25/0x30 [ 31.581554] __kasan_slab_alloc+0x59/0x70 [ 31.582144] kmem_cache_alloc+0x16b/0x370 [ 31.582737] vm_area_dup+0x20/0x160 [ 31.583254] __split_vma+0x170/0x950 [ 31.583775] split_vma+0xc6/0x110 [ 31.584289] mprotect_fixup+0x8d2/0xb30 [ 31.584859] do_mprotect_pkey+0x87e/0xd40 [ 31.585453] __x64_sys_mprotect+0x78/0xc0 [ 31.586041] do_syscall_64+0x3f/0x90 [ 31.586577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.587305] [ 31.587546] Freed by task 213: [ 31.587990] kasan_save_stack+0x22/0x50 [ 31.588572] kasan_set_track+0x25/0x30 [ 31.589131] kasan_save_free_info+0x2b/0x50 [ 31.589681] __kasan_slab_free+0x10a/0x190 [ 31.590216] kmem_cache_free+0x10d/0x4d0 [ 31.590733] rcu_core+0x8c8/0x2860 [ 31.591186] __do_softirq+0x1b7/0x7d4 [ 31.591694] [ 31.591916] Last potentially related work creation: [ 31.592540] kasan_save_stack+0x22/0x50 [ 31.593091] __kasan_record_aux_stack+0x8e/0xa0 [ 31.593678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.594342] remove_vma+0x139/0x170 [ 31.594799] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.595381] do_vmi_munmap+0x1f1/0x2b0 [ 31.595870] __vm_munmap+0x138/0x3a0 [ 31.596345] __x64_sys_munmap+0x59/0x80 [ 31.596837] do_syscall_64+0x3f/0x90 [ 31.597304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.597940] [ 31.598152] The buggy address belongs to the object at ffff88800e48fae0 [ 31.598152] which belongs to the cache vm_area_struct of size 168 [ 31.599612] The buggy address is located 88 bytes inside of [ 31.599612] freed 168-byte region [ffff88800e48fae0, ffff88800e48fb88) [ 31.601011] [ 31.601223] The buggy address belongs to the physical page: [ 31.601881] page:000000005b6d4d6d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe48f [ 31.602969] memcg:ffff88800c515301 [ 31.603391] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.604049] page_type: 0xffffffff() [ 31.604518] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.605439] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c515301 [ 31.606342] page dumped because: kasan: bad access detected [ 31.607001] [ 31.607216] Memory state around the buggy address: [ 31.607803] ffff88800e48fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.608665] ffff88800e48fa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.609511] >ffff88800e48fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.610372] ^ [ 31.610976] ffff88800e48fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.611834] ffff88800e48fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.612708] ================================================================== [ 31.613757] Disabling lock debugging due to kernel taint [ 33.843499] BUG: Bad rss-counter state mm:000000004ef6544f type:MM_FILEPAGES val:33 [ 33.844621] BUG: Bad rss-counter state mm:000000004ef6544f type:MM_ANONPAGES val:22 [ 34.333931] BUG: Bad rss-counter state mm:0000000098c4aec9 type:MM_FILEPAGES val:33 [ 34.335419] BUG: Bad rss-counter state mm:0000000098c4aec9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55868' (ECDSA) to the list of known hosts. 2023/06/20 11:52:37 fuzzer started 2023/06/20 11:52:38 dialing manager at localhost:36067 2023/06/20 11:52:38 checking machine... 2023/06/20 11:52:38 checking revisions... [ 35.056698] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:52:38 testing simple program... [ 35.096833] cgroup: Unknown subsys name 'net' [ 35.140419] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:52:37 Registers: info registers vcpu 0 RAX=ffffea000074e8c0 RBX=1ffff110012a1f35 RCX=0000000000000000 RDX=ffff888009500000 RSI=ffffffff844f84fa RDI=0000000000000001 RBP=0000000000001510 RSP=ffff88800950f9a8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff88801971e7f0 R13=0000000000000001 R14=0000000000000001 R15=ffff88801971e7f0 RIP=ffffffff844f9cc4 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 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=00007f6254864298 CR3=000000000e28a000 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=8b48fff9b1e0e8ef8948fffffea8850f XMM02=247c834800000081820f0824548948d0 XMM03=04894cc6894cc00149c08949c7430f49 XMM04=8b482fff41c6ff408d48c18948fff9af XMM05=4c8b4820244c8948182444894c402444 XMM06=c70148d2894cd7294c082444894c4024 XMM07=2024548b4cc7894c00000334840fc085 XMM08=001f0fffffe503e8fffffeaee9cd894d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110039c1e11 RBX=0000000000000004 RCX=0000000000000000 RDX=0000000000000018 RSI=ffffffff8449f7fb RDI=0000000000000000 RBP=00007fcfa1e03fff RSP=ffff88801ce0ee80 R8 =0000000000000000 R9 =0000000000000009 R10=0000000000000003 R11=ffff88800e1c061c R12=ffff88801ce0f088 R13=0000000000000003 R14=dffffc0000000000 R15=ffff88801ce0ef20 RIP=ffffffff8449f812 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 00007fcfa1dcf900 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=0000560c19c0b9b8 CR3=000000000e28a000 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