syzkaller login: [ 34.688955] BUG: Bad rss-counter state mm:0000000034d54ace type:MM_FILEPAGES val:33 [ 34.689606] BUG: Bad rss-counter state mm:0000000034d54ace type:MM_ANONPAGES val:22 [ 34.775962] ================================================================== [ 34.776572] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.778092] Read of size 8 at addr ffff88800ec33880 by task sshd/221 [ 34.778660] [ 34.778837] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 34.779396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.780066] Call Trace: [ 34.780271] <TASK> [ 34.780454] dump_stack_lvl+0x91/0xf0 [ 34.780869] print_report+0xcc/0x620 [ 34.781184] ? __virt_addr_valid+0x102/0x340 [ 34.781537] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.782176] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.782748] kasan_report+0xbe/0xf0 [ 34.783198] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.783651] vma_interval_tree_remove+0xc75/0xec0 [ 34.784162] vma_prepare+0xc54/0x11a0 [ 34.784834] __split_vma+0x5af/0x950 [ 34.785162] ? __pfx___split_vma+0x10/0x10 [ 34.785643] ? find_held_lock+0x2c/0x110 [ 34.786116] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.786619] ? lock_is_held_type+0x9f/0x120 [ 34.787104] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.787634] ? mtree_range_walk+0x632/0x900 [ 34.788112] ? mas_walk+0x5c7/0x7c0 [ 34.788487] do_vmi_munmap+0x1f1/0x2b0 [ 34.788944] mmap_region+0x1f9/0x2660 [ 34.789339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.789839] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.790389] ? __pfx_lock_acquire+0x10/0x10 [ 34.790893] ? __pfx_mmap_region+0x10/0x10 [ 34.791265] ? security_mmap_addr+0x7d/0xa0 [ 34.791759] ? get_unmapped_area+0x1f5/0x3f0 [ 34.792163] do_mmap+0x854/0xf00 [ 34.792518] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.793008] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.793440] ksys_mmap_pgoff+0x3af/0x500 [ 34.793837] do_syscall_64+0x3f/0x90 [ 34.794221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.794786] RIP: 0033:0x7f253a08bd82 [ 34.795115] 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 [ 34.796827] RSP: 002b:00007ffee1ec0c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.797697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f253a08bd82 [ 34.798247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25394c5000 [ 34.798794] RBP: 00007f25394c5000 R08: 0000000000000009 R09: 0000000000001000 [ 34.799478] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4af9fbec0 [ 34.800216] R13: 00007ffee1ec0ca0 R14: 00007ffee1ec0cd0 R15: 00007ffee1ec1030 [ 34.800984] </TASK> [ 34.801176] [ 34.801335] Allocated by task 214: [ 34.801680] kasan_save_stack+0x22/0x50 [ 34.802012] kasan_set_track+0x25/0x30 [ 34.802333] __kasan_slab_alloc+0x59/0x70 [ 34.802783] kmem_cache_alloc+0x16b/0x370 [ 34.803187] vm_area_dup+0x20/0x160 [ 34.803575] __split_vma+0x170/0x950 [ 34.803893] split_vma+0xc6/0x110 [ 34.804376] mprotect_fixup+0x8d2/0xb30 [ 34.804723] do_mprotect_pkey+0x87e/0xd40 [ 34.805117] __x64_sys_mprotect+0x78/0xc0 [ 34.805460] do_syscall_64+0x3f/0x90 [ 34.805777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.806197] [ 34.806337] Freed by task 214: [ 34.806588] kasan_save_stack+0x22/0x50 [ 34.806919] kasan_set_track+0x25/0x30 [ 34.807240] kasan_save_free_info+0x2b/0x50 [ 34.807584] __kasan_slab_free+0x10a/0x190 [ 34.807938] kmem_cache_free+0x10d/0x4d0 [ 34.808270] rcu_core+0x8c8/0x2860 [ 34.808568] __do_softirq+0x1b7/0x7d4 [ 34.808885] [ 34.809027] Last potentially related work creation: [ 34.809406] kasan_save_stack+0x22/0x50 [ 34.809737] __kasan_record_aux_stack+0x8e/0xa0 [ 34.810109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.810526] remove_vma+0x139/0x170 [ 34.810821] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.811180] do_vmi_munmap+0x1f1/0x2b0 [ 34.811493] __vm_munmap+0x138/0x3a0 [ 34.811829] __x64_sys_munmap+0x59/0x80 [ 34.812163] do_syscall_64+0x3f/0x90 [ 34.812473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.812917] [ 34.813058] Second to last potentially related work creation: [ 34.813495] kasan_save_stack+0x22/0x50 [ 34.813823] __kasan_record_aux_stack+0x8e/0xa0 [ 34.814193] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.814606] remove_vma+0x139/0x170 [ 34.814930] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.815288] do_vmi_munmap+0x1f1/0x2b0 [ 34.815600] mmap_region+0x1f9/0x2660 [ 34.815918] do_mmap+0x854/0xf00 [ 34.816199] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.816517] ksys_mmap_pgoff+0x3af/0x500 [ 34.816869] do_syscall_64+0x3f/0x90 [ 34.817178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.817594] [ 34.817737] The buggy address belongs to the object at ffff88800ec33828 [ 34.817737] which belongs to the cache vm_area_struct of size 168 [ 34.818678] The buggy address is located 88 bytes inside of [ 34.818678] freed 168-byte region [ffff88800ec33828, ffff88800ec338d0) [ 34.819579] [ 34.819732] The buggy address belongs to the physical page: [ 34.820171] page:00000000730843e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec33 [ 34.820907] memcg:ffff88800cd67201 [ 34.821184] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.821600] page_type: 0xffffffff() [ 34.821895] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 34.822487] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd67201 [ 34.823102] page dumped because: kasan: bad access detected [ 34.823524] [ 34.823665] Memory state around the buggy address: [ 34.824082] ffff88800ec33780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.824647] ffff88800ec33800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.825207] >ffff88800ec33880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.825757] ^ [ 34.826024] ffff88800ec33900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.826574] ffff88800ec33980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.827149] ================================================================== [ 34.827842] Disabling lock debugging due to kernel taint [ 38.907868] BUG: Bad rss-counter state mm:000000008596a563 type:MM_FILEPAGES val:33 [ 38.908758] BUG: Bad rss-counter state mm:000000008596a563 type:MM_ANONPAGES val:22 [ 39.768757] BUG: Bad rss-counter state mm:00000000dbdf3268 type:MM_FILEPAGES val:33 [ 39.769407] BUG: Bad rss-counter state mm:00000000dbdf3268 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20764' (ECDSA) to the list of known hosts. 2023/06/21 10:01:38 fuzzer started 2023/06/21 10:01:39 dialing manager at localhost:36067 2023/06/21 10:01:39 checking machine... 2023/06/21 10:01:39 checking revisions... 2023/06/21 10:01:39 testing simple program... [ 40.553993] kmemleak: Automatic memory scanning thread ended [ 40.610280] cgroup: Unknown subsys name 'net' [ 40.674037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:01:39 Registers: info registers vcpu 0 RAX=ffff88800ee90001 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=ffff88800ee8f001 RSI=ffff88800ee8f048 RDI=ffff88806ce09aa8 RBP=ffff88800ee8f048 RSP=ffff88806ce099f0 R8 =ffffffff86097f2e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006054 R12=0000000000000008 R13=ffff88800ee88000 R14=ffff88800ee8f050 R15=ffff88806ce09a98 RIP=ffffffff8113048d RFL=00000283 [--S---C] 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 00007f937c4ed900 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=00007f937c492008 CR3=00000000199a6000 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=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 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff861386ee RDX=0000000000000000 RSI=1ffff11002e6fea5 RDI=0000000000000001 RBP=ffff88801737f540 RSP=ffff88801737f478 R8 =ffffffff861386f2 R9 =ffff88801737f528 R10=0000000000038001 R11=0000000000020c51 R12=ffff88801737f548 R13=ffff88801737f530 R14=ffff88801737f529 R15=ffff88801737f4e8 RIP=ffffffff81130af5 RFL=00000216 [----AP-] 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 00007f0eef8f5900 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=00007f937c482000 CR3=0000000016d00000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000