syzkaller login: [ 29.737551] BUG: Bad rss-counter state mm:00000000e8ae89d9 type:MM_FILEPAGES val:33 [ 29.738820] BUG: Bad rss-counter state mm:00000000e8ae89d9 type:MM_ANONPAGES val:22 [ 29.780388] ================================================================== [ 29.781314] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.782250] Read of size 8 at addr ffff88800fef9968 by task sshd/220 [ 29.783171] [ 29.783393] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.784280] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.785271] Call Trace: [ 29.785588] [ 29.785872] dump_stack_lvl+0x91/0xf0 [ 29.786366] print_report+0xcc/0x620 [ 29.786846] ? __virt_addr_valid+0x102/0x340 [ 29.787405] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.788018] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.788651] kasan_report+0xbe/0xf0 [ 29.789133] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.789772] vma_interval_tree_remove+0xc75/0xec0 [ 29.790410] vma_prepare+0xc54/0x11a0 [ 29.790904] __split_vma+0x5af/0x950 [ 29.791395] ? __pfx___split_vma+0x10/0x10 [ 29.791936] ? find_held_lock+0x2c/0x110 [ 29.792476] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.793056] ? lock_is_held_type+0x9f/0x120 [ 29.793635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.794258] ? mtree_range_walk+0x632/0x900 [ 29.794822] ? mas_walk+0x5c7/0x7c0 [ 29.795319] do_vmi_munmap+0x1f1/0x2b0 [ 29.795841] mmap_region+0x1f9/0x2660 [ 29.796327] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.796854] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.797595] ? __pfx_lock_acquire+0x10/0x10 [ 29.798132] ? __pfx_mmap_region+0x10/0x10 [ 29.798692] ? security_mmap_addr+0x7d/0xa0 [ 29.799230] ? get_unmapped_area+0x1f5/0x3f0 [ 29.799795] do_mmap+0x854/0xf00 [ 29.800240] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.800783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.801356] ksys_mmap_pgoff+0x3af/0x500 [ 29.801885] do_syscall_64+0x3f/0x90 [ 29.802377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.803063] RIP: 0033:0x7f321286fd82 [ 29.803558] 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 [ 29.805766] RSP: 002b:00007ffc5dc87e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.806696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f321286fd82 [ 29.807547] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3211ca9000 [ 29.808392] RBP: 00007f3211ca9000 R08: 0000000000000009 R09: 0000000000001000 [ 29.809234] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d9b94fd90 [ 29.810091] R13: 00007ffc5dc87e30 R14: 00007ffc5dc87e60 R15: 00007ffc5dc881c0 [ 29.810984] [ 29.811286] [ 29.811500] Allocated by task 213: [ 29.811933] kasan_save_stack+0x22/0x50 [ 29.812456] kasan_set_track+0x25/0x30 [ 29.812958] __kasan_slab_alloc+0x59/0x70 [ 29.813520] kmem_cache_alloc+0x16b/0x370 [ 29.814053] vm_area_dup+0x20/0x160 [ 29.814522] __split_vma+0x170/0x950 [ 29.815014] split_vma+0xc6/0x110 [ 29.815469] mprotect_fixup+0x8d2/0xb30 [ 29.815998] do_mprotect_pkey+0x87e/0xd40 [ 29.816543] __x64_sys_mprotect+0x78/0xc0 [ 29.817071] do_syscall_64+0x3f/0x90 [ 29.817570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.818232] [ 29.818453] Freed by task 213: [ 29.818848] kasan_save_stack+0x22/0x50 [ 29.819343] kasan_set_track+0x25/0x30 [ 29.819834] kasan_save_free_info+0x2b/0x50 [ 29.820381] __kasan_slab_free+0x10a/0x190 [ 29.820915] kmem_cache_free+0x10d/0x4d0 [ 29.821423] rcu_core+0x8c8/0x2860 [ 29.821866] __do_softirq+0x1b7/0x7d4 [ 29.822341] [ 29.822555] Last potentially related work creation: [ 29.823147] kasan_save_stack+0x22/0x50 [ 29.823653] __kasan_record_aux_stack+0x8e/0xa0 [ 29.824223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.824876] remove_vma+0x139/0x170 [ 29.825328] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.825887] do_vmi_munmap+0x1f1/0x2b0 [ 29.826372] __vm_munmap+0x138/0x3a0 [ 29.826837] __x64_sys_munmap+0x59/0x80 [ 29.827328] do_syscall_64+0x3f/0x90 [ 29.827800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.828445] [ 29.828669] The buggy address belongs to the object at ffff88800fef9910 [ 29.828669] which belongs to the cache vm_area_struct of size 168 [ 29.830129] The buggy address is located 88 bytes inside of [ 29.830129] freed 168-byte region [ffff88800fef9910, ffff88800fef99b8) [ 29.831529] [ 29.831748] The buggy address belongs to the physical page: [ 29.832421] page:00000000adcc2dd1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfef9 [ 29.833499] memcg:ffff88800989e001 [ 29.833928] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.834577] page_type: 0xffffffff() [ 29.835022] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.835936] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800989e001 [ 29.836841] page dumped because: kasan: bad access detected [ 29.837492] [ 29.837705] Memory state around the buggy address: [ 29.838280] ffff88800fef9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.839141] ffff88800fef9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.839995] >ffff88800fef9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.840882] ^ [ 29.841675] ffff88800fef9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.842532] ffff88800fef9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.843375] ================================================================== [ 29.844612] Disabling lock debugging due to kernel taint [ 31.936052] BUG: Bad rss-counter state mm:00000000b8561449 type:MM_FILEPAGES val:33 [ 31.937121] BUG: Bad rss-counter state mm:00000000b8561449 type:MM_ANONPAGES val:22 [ 32.370700] BUG: Bad rss-counter state mm:000000009ac4df23 type:MM_FILEPAGES val:33 [ 32.371437] BUG: Bad rss-counter state mm:000000009ac4df23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44816' (ECDSA) to the list of known hosts. 2023/06/19 20:08:16 fuzzer started 2023/06/19 20:08:17 dialing manager at localhost:44161 2023/06/19 20:08:17 checking machine... 2023/06/19 20:08:17 checking revisions... [ 32.997427] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:08:17 testing simple program... [ 33.050972] cgroup: Unknown subsys name 'net' [ 33.105449] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:08:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8450b05d RDX=00000000000350b0 RSI=00000000000350b0 RDI=ffffffff865bbe80 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113077a 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 00007f274d6bf900 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=00007f274d678008 CR3=00000000199e0000 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=dffffc0000000000 RBX=ffff88806cf09a50 RCX=ffffffff86137501 RDX=1ffff1100d9e1355 RSI=0000000000000000 RDI=ffffffff8180ee7e RBP=ffff88806cf09aa8 RSP=ffff88806cf09a38 R8 =ffffffff8613751e R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800dadee00 RIP=ffffffff811303b2 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 0000000000000000 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=00007f71e8984180 CR3=0000000016434000 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=2036313a38303a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a38303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000