syzkaller login: [ 31.612444] BUG: Bad rss-counter state mm:000000000f989957 type:MM_FILEPAGES val:33 [ 31.614075] BUG: Bad rss-counter state mm:000000000f989957 type:MM_ANONPAGES val:22 [ 31.782406] ================================================================== [ 31.783305] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.784252] Read of size 8 at addr ffff88800ec28310 by task sshd/219 [ 31.785014] [ 31.785356] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.786288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.787233] Call Trace: [ 31.787544] [ 31.787853] dump_stack_lvl+0x91/0xf0 [ 31.788331] print_report+0xcc/0x620 [ 31.788809] ? __virt_addr_valid+0x102/0x340 [ 31.789343] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.789940] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.790544] kasan_report+0xbe/0xf0 [ 31.791005] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.791618] vma_interval_tree_remove+0xc75/0xec0 [ 31.792207] vma_prepare+0xc54/0x11a0 [ 31.792682] __split_vma+0x5af/0x950 [ 31.793139] ? __pfx___split_vma+0x10/0x10 [ 31.793683] ? find_held_lock+0x2c/0x110 [ 31.794189] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.794740] ? lock_is_held_type+0x9f/0x120 [ 31.795274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.795885] ? mtree_range_walk+0x632/0x900 [ 31.796422] ? mas_walk+0x5c7/0x7c0 [ 31.796893] do_vmi_munmap+0x1f1/0x2b0 [ 31.797378] mmap_region+0x1f9/0x2660 [ 31.797846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.798351] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.799046] ? __pfx_lock_acquire+0x10/0x10 [ 31.799567] ? __pfx_mmap_region+0x10/0x10 [ 31.800097] ? security_mmap_addr+0x7d/0xa0 [ 31.800614] ? get_unmapped_area+0x1f5/0x3f0 [ 31.801159] do_mmap+0x854/0xf00 [ 31.801584] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.802069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.802624] ksys_mmap_pgoff+0x3af/0x500 [ 31.803126] do_syscall_64+0x3f/0x90 [ 31.803599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.804252] RIP: 0033:0x7fe0607bed82 [ 31.804708] 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 [ 31.806751] RSP: 002b:00007ffcb0ae9a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.807642] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe0607bed82 [ 31.808467] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe05fbf8000 [ 31.809303] RBP: 00007fe05fbf8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.810139] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b42a9fff60 [ 31.810965] R13: 00007ffcb0ae9a90 R14: 00007ffcb0ae9ac0 R15: 00007ffcb0ae9e20 [ 31.811816] [ 31.812101] [ 31.812308] Allocated by task 212: [ 31.812728] kasan_save_stack+0x22/0x50 [ 31.813216] kasan_set_track+0x25/0x30 [ 31.813699] __kasan_slab_alloc+0x59/0x70 [ 31.814208] kmem_cache_alloc+0x16b/0x370 [ 31.814708] vm_area_dup+0x20/0x160 [ 31.815153] __split_vma+0x170/0x950 [ 31.815634] split_vma+0xc6/0x110 [ 31.816071] mprotect_fixup+0x8d2/0xb30 [ 31.816561] do_mprotect_pkey+0x87e/0xd40 [ 31.817070] __x64_sys_mprotect+0x78/0xc0 [ 31.817580] do_syscall_64+0x3f/0x90 [ 31.818045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.818669] [ 31.818879] Freed by task 212: [ 31.819265] kasan_save_stack+0x22/0x50 [ 31.819766] kasan_set_track+0x25/0x30 [ 31.820250] kasan_save_free_info+0x2b/0x50 [ 31.820766] __kasan_slab_free+0x10a/0x190 [ 31.821287] kmem_cache_free+0x10d/0x4d0 [ 31.821781] rcu_core+0x8c8/0x2860 [ 31.822215] __do_softirq+0x1b7/0x7d4 [ 31.822679] [ 31.822889] Last potentially related work creation: [ 31.823462] kasan_save_stack+0x22/0x50 [ 31.823959] __kasan_record_aux_stack+0x8e/0xa0 [ 31.824515] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.825159] remove_vma+0x139/0x170 [ 31.825599] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.826166] do_vmi_munmap+0x1f1/0x2b0 [ 31.826638] __vm_munmap+0x138/0x3a0 [ 31.827093] __x64_sys_munmap+0x59/0x80 [ 31.827575] do_syscall_64+0x3f/0x90 [ 31.828057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.828682] [ 31.828891] Second to last potentially related work creation: [ 31.829556] kasan_save_stack+0x22/0x50 [ 31.830047] __kasan_record_aux_stack+0x8e/0xa0 [ 31.830599] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.831226] remove_vma+0x139/0x170 [ 31.831691] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.832238] do_vmi_munmap+0x1f1/0x2b0 [ 31.832713] mmap_region+0x1f9/0x2660 [ 31.833177] do_mmap+0x854/0xf00 [ 31.833596] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.834077] ksys_mmap_pgoff+0x3af/0x500 [ 31.834562] do_syscall_64+0x3f/0x90 [ 31.835023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.835655] [ 31.835866] The buggy address belongs to the object at ffff88800ec282b8 [ 31.835866] which belongs to the cache vm_area_struct of size 168 [ 31.837294] The buggy address is located 88 bytes inside of [ 31.837294] freed 168-byte region [ffff88800ec282b8, ffff88800ec28360) [ 31.838664] [ 31.838876] The buggy address belongs to the physical page: [ 31.839513] page:0000000040c53654 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec28 [ 31.840583] memcg:ffff888018c47e01 [ 31.840997] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.841630] page_type: 0xffffffff() [ 31.842065] raw: 0100000000000200 ffff8880087a0c80 ffffea000039b280 dead000000000004 [ 31.842955] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c47e01 [ 31.843862] page dumped because: kasan: bad access detected [ 31.844508] [ 31.844719] Memory state around the buggy address: [ 31.845285] ffff88800ec28200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.846115] ffff88800ec28280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.846940] >ffff88800ec28300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.847771] ^ [ 31.848231] ffff88800ec28380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.849064] ffff88800ec28400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.849896] ================================================================== [ 31.850849] Disabling lock debugging due to kernel taint [ 33.726581] BUG: Bad rss-counter state mm:00000000ea17e8c4 type:MM_FILEPAGES val:33 [ 33.727342] BUG: Bad rss-counter state mm:00000000ea17e8c4 type:MM_ANONPAGES val:22 [ 34.307164] BUG: Bad rss-counter state mm:0000000069d2f0d7 type:MM_FILEPAGES val:33 [ 34.308430] BUG: Bad rss-counter state mm:0000000069d2f0d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12962' (ECDSA) to the list of known hosts. 2023/06/20 12:32:51 fuzzer started 2023/06/20 12:32:51 dialing manager at localhost:36067 2023/06/20 12:32:51 checking machine... 2023/06/20 12:32:51 checking revisions... [ 34.940335] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:32:51 testing simple program... [ 34.991938] cgroup: Unknown subsys name 'net' [ 35.037345] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:32:50 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffff88800e928420 RCX=ffffffff818e97d3 RDX=ffff8880159a51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000008 RSP=ffff8880146a7e00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800e9283c0 R13=0000000000000000 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff814c086b 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 00007fb0dace2900 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=00007ffe9071a000 CR3=0000000009654000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f98a4854ca0 CR3=000000000e1da000 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=2030353a32333a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a32333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000