[ 24.379712] BUG: Bad rss-counter state mm:000000000454c566 type:MM_FILEPAGES val:33 [ 24.380871] BUG: Bad rss-counter state mm:000000000454c566 type:MM_ANONPAGES val:22 [ 24.423099] ================================================================== [ 24.424028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.424948] Read of size 8 at addr ffff88800d750968 by task sshd/220 [ 24.425726] [ 24.425943] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.426898] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.427888] Call Trace: [ 24.428215] [ 24.428504] dump_stack_lvl+0x91/0xf0 [ 24.429006] print_report+0xcc/0x620 [ 24.429518] ? __virt_addr_valid+0x102/0x340 [ 24.430075] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.430700] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.431318] kasan_report+0xbe/0xf0 [ 24.431799] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.432416] vma_interval_tree_remove+0xc75/0xec0 [ 24.433015] vma_prepare+0xc54/0x11a0 [ 24.433493] __split_vma+0x5af/0x950 [ 24.433962] ? __pfx___split_vma+0x10/0x10 [ 24.434483] ? find_held_lock+0x2c/0x110 [ 24.435001] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.435559] ? lock_is_held_type+0x9f/0x120 [ 24.436091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.436686] ? mtree_range_walk+0x632/0x900 [ 24.437228] ? mas_walk+0x5c7/0x7c0 [ 24.437707] do_vmi_munmap+0x1f1/0x2b0 [ 24.438198] mmap_region+0x1f9/0x2660 [ 24.438681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.439192] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.439899] ? __pfx_lock_acquire+0x10/0x10 [ 24.440424] ? __pfx_mmap_region+0x10/0x10 [ 24.440946] ? security_mmap_addr+0x7d/0xa0 [ 24.441495] ? get_unmapped_area+0x1f5/0x3f0 [ 24.442039] do_mmap+0x854/0xf00 [ 24.442475] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.442963] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.443517] ksys_mmap_pgoff+0x3af/0x500 [ 24.444020] do_syscall_64+0x3f/0x90 [ 24.444494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.445133] RIP: 0033:0x7f080ac67d82 [ 24.445594] 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 [ 24.447679] RSP: 002b:00007ffed6346778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.448571] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f080ac67d82 [ 24.449431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f080a0a1000 [ 24.450280] RBP: 00007f080a0a1000 R08: 0000000000000009 R09: 0000000000001000 [ 24.451120] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590a8697ec0 [ 24.451981] R13: 00007ffed6346790 R14: 00007ffed63467c0 R15: 00007ffed6346b20 [ 24.452842] [ 24.453137] [ 24.453357] Allocated by task 213: [ 24.453791] kasan_save_stack+0x22/0x50 [ 24.454293] kasan_set_track+0x25/0x30 [ 24.454788] __kasan_slab_alloc+0x59/0x70 [ 24.455318] kmem_cache_alloc+0x16b/0x370 [ 24.455834] vm_area_dup+0x20/0x160 [ 24.456289] __split_vma+0x170/0x950 [ 24.456767] split_vma+0xc6/0x110 [ 24.457212] mprotect_fixup+0x8d2/0xb30 [ 24.457733] do_mprotect_pkey+0x87e/0xd40 [ 24.458250] __x64_sys_mprotect+0x78/0xc0 [ 24.458770] do_syscall_64+0x3f/0x90 [ 24.459244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.459901] [ 24.460114] Freed by task 213: [ 24.460511] kasan_save_stack+0x22/0x50 [ 24.461009] kasan_set_track+0x25/0x30 [ 24.461516] kasan_save_free_info+0x2b/0x50 [ 24.462040] __kasan_slab_free+0x10a/0x190 [ 24.462565] kmem_cache_free+0x10d/0x4d0 [ 24.463071] rcu_core+0x8c8/0x2860 [ 24.463511] __do_softirq+0x1b7/0x7d4 [ 24.464044] [ 24.464260] Last potentially related work creation: [ 24.464840] kasan_save_stack+0x22/0x50 [ 24.465350] __kasan_record_aux_stack+0x8e/0xa0 [ 24.465926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.466563] remove_vma+0x139/0x170 [ 24.467010] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.467564] do_vmi_munmap+0x1f1/0x2b0 [ 24.468045] __vm_munmap+0x138/0x3a0 [ 24.468511] __x64_sys_munmap+0x59/0x80 [ 24.469004] do_syscall_64+0x3f/0x90 [ 24.469499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.470138] [ 24.470349] Second to last potentially related work creation: [ 24.471027] kasan_save_stack+0x22/0x50 [ 24.471535] __kasan_record_aux_stack+0x8e/0xa0 [ 24.472098] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.472736] remove_vma+0x139/0x170 [ 24.473189] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.473754] do_vmi_munmap+0x1f1/0x2b0 [ 24.474241] mmap_region+0x1f9/0x2660 [ 24.474713] do_mmap+0x854/0xf00 [ 24.475140] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.475631] ksys_mmap_pgoff+0x3af/0x500 [ 24.476136] do_syscall_64+0x3f/0x90 [ 24.476608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.477250] [ 24.477489] The buggy address belongs to the object at ffff88800d750910 [ 24.477489] which belongs to the cache vm_area_struct of size 168 [ 24.478945] The buggy address is located 88 bytes inside of [ 24.478945] freed 168-byte region [ffff88800d750910, ffff88800d7509b8) [ 24.480327] [ 24.480546] The buggy address belongs to the physical page: [ 24.481194] page:00000000c33259c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd750 [ 24.482286] memcg:ffff88800eb50001 [ 24.482708] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.483348] page_type: 0xffffffff() [ 24.483801] raw: 0100000000000200 ffff88800879fc80 ffffea0000266a40 dead000000000006 [ 24.484722] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb50001 [ 24.485634] page dumped because: kasan: bad access detected [ 24.486294] [ 24.486513] Memory state around the buggy address: [ 24.487084] ffff88800d750800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.487931] ffff88800d750880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.488788] >ffff88800d750900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.489641] ^ [ 24.490416] ffff88800d750980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 24.491256] ffff88800d750a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.492099] ================================================================== [ 24.493012] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.316277] BUG: Bad rss-counter state mm:000000001ef03d2e type:MM_FILEPAGES val:33 [ 26.317564] BUG: Bad rss-counter state mm:000000001ef03d2e type:MM_ANONPAGES val:22 [ 26.684041] BUG: Bad rss-counter state mm:00000000b6755fc8 type:MM_FILEPAGES val:33 [ 26.684787] BUG: Bad rss-counter state mm:00000000b6755fc8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26192' (ECDSA) to the list of known hosts. 2023/06/20 02:49:02 fuzzer started 2023/06/20 02:49:03 dialing manager at localhost:44161 2023/06/20 02:49:03 checking machine... 2023/06/20 02:49:03 checking revisions... [ 27.304602] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:49:03 testing simple program... [ 27.350844] cgroup: Unknown subsys name 'net' [ 27.392671] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:49:02 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff8449b86d RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800cce9a00 RSP=ffff8880197cf0f8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=ffff88800ca109f8 R12=0000000000000009 R13=0000000000000001 R14=0000000000000000 R15=0000000000000003 RIP=ffffffff814c01d0 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 00007f01acaa4900 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=00007f01aca69008 CR3=0000000016e90000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f5a0a946d80 CR3=0000000015c40000 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=2032303a39343a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a39343a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000