syzkaller login: [ 38.688059] BUG: Bad rss-counter state mm:00000000b4d0c016 type:MM_FILEPAGES val:33 [ 38.689092] BUG: Bad rss-counter state mm:00000000b4d0c016 type:MM_ANONPAGES val:22 [ 38.802156] ================================================================== [ 38.803176] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.803894] Read of size 8 at addr ffff88800e115b38 by task sshd/220 [ 38.804474] [ 38.804751] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.805419] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.806161] Call Trace: [ 38.806416] [ 38.806632] dump_stack_lvl+0x91/0xf0 [ 38.807023] print_report+0xcc/0x620 [ 38.807393] ? __virt_addr_valid+0x102/0x340 [ 38.807815] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.808283] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.808754] kasan_report+0xbe/0xf0 [ 38.809112] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.809577] vma_interval_tree_remove+0xc75/0xec0 [ 38.810031] vma_prepare+0xc54/0x11a0 [ 38.810399] __split_vma+0x5af/0x950 [ 38.810755] ? __pfx___split_vma+0x10/0x10 [ 38.811158] ? find_held_lock+0x2c/0x110 [ 38.811556] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.811986] ? lock_is_held_type+0x9f/0x120 [ 38.812396] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.812863] ? mtree_range_walk+0x632/0x900 [ 38.813285] ? mas_walk+0x5c7/0x7c0 [ 38.813645] do_vmi_munmap+0x1f1/0x2b0 [ 38.814020] mmap_region+0x1f9/0x2660 [ 38.814405] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.814794] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.815269] ? __pfx_lock_acquire+0x10/0x10 [ 38.815591] ? __pfx_mmap_region+0x10/0x10 [ 38.815911] ? security_mmap_addr+0x7d/0xa0 [ 38.816234] ? get_unmapped_area+0x1f5/0x3f0 [ 38.816569] do_mmap+0x854/0xf00 [ 38.816834] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.817131] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.817473] ksys_mmap_pgoff+0x3af/0x500 [ 38.817780] do_syscall_64+0x3f/0x90 [ 38.818072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.818473] RIP: 0033:0x7ffbc7bfad82 [ 38.818756] 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 [ 38.820063] RSP: 002b:00007ffef518a218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.820614] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffbc7bfad82 [ 38.821125] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffbc7034000 [ 38.821643] RBP: 00007ffbc7034000 R08: 0000000000000009 R09: 0000000000001000 [ 38.822163] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ee6d6cb20 [ 38.822686] R13: 00007ffef518a230 R14: 00007ffef518a260 R15: 00007ffef518a5c0 [ 38.823215] [ 38.823396] [ 38.823524] Allocated by task 213: [ 38.823788] kasan_save_stack+0x22/0x50 [ 38.824091] kasan_set_track+0x25/0x30 [ 38.824393] __kasan_slab_alloc+0x59/0x70 [ 38.824708] kmem_cache_alloc+0x16b/0x370 [ 38.825023] vm_area_dup+0x20/0x160 [ 38.825295] __split_vma+0x170/0x950 [ 38.825578] split_vma+0xc6/0x110 [ 38.825841] mprotect_fixup+0x8d2/0xb30 [ 38.826146] do_mprotect_pkey+0x87e/0xd40 [ 38.826475] __x64_sys_mprotect+0x78/0xc0 [ 38.826789] do_syscall_64+0x3f/0x90 [ 38.827078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.827466] [ 38.827598] Freed by task 19: [ 38.827831] kasan_save_stack+0x22/0x50 [ 38.828137] kasan_set_track+0x25/0x30 [ 38.828435] kasan_save_free_info+0x2b/0x50 [ 38.828758] __kasan_slab_free+0x10a/0x190 [ 38.829081] kmem_cache_free+0x10d/0x4d0 [ 38.829387] rcu_core+0x8c8/0x2860 [ 38.829656] __do_softirq+0x1b7/0x7d4 [ 38.829949] [ 38.830081] Last potentially related work creation: [ 38.830444] kasan_save_stack+0x22/0x50 [ 38.830748] __kasan_record_aux_stack+0x8e/0xa0 [ 38.831095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.831489] remove_vma+0x139/0x170 [ 38.831763] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.832106] do_vmi_munmap+0x1f1/0x2b0 [ 38.832395] __vm_munmap+0x138/0x3a0 [ 38.832675] __x64_sys_munmap+0x59/0x80 [ 38.832973] do_syscall_64+0x3f/0x90 [ 38.833261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.833651] [ 38.833780] Second to last potentially related work creation: [ 38.834201] kasan_save_stack+0x22/0x50 [ 38.834517] __kasan_record_aux_stack+0x8e/0xa0 [ 38.834862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.835246] remove_vma+0x139/0x170 [ 38.835518] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.835858] do_vmi_munmap+0x1f1/0x2b0 [ 38.836148] mmap_region+0x1f9/0x2660 [ 38.836439] do_mmap+0x854/0xf00 [ 38.836700] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.836988] ksys_mmap_pgoff+0x3af/0x500 [ 38.837288] do_syscall_64+0x3f/0x90 [ 38.837569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.837956] [ 38.838084] The buggy address belongs to the object at ffff88800e115ae0 [ 38.838084] which belongs to the cache vm_area_struct of size 168 [ 38.838992] The buggy address is located 88 bytes inside of [ 38.838992] freed 168-byte region [ffff88800e115ae0, ffff88800e115b88) [ 38.839844] [ 38.839977] The buggy address belongs to the physical page: [ 38.840387] page:000000008c48b4be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe115 [ 38.841050] memcg:ffff888010328001 [ 38.841309] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.841702] page_type: 0xffffffff() [ 38.841974] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384040 dead000000000002 [ 38.842541] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010328001 [ 38.843090] page dumped because: kasan: bad access detected [ 38.843487] [ 38.843618] Memory state around the buggy address: [ 38.843967] ffff88800e115a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.844493] ffff88800e115a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.845009] >ffff88800e115b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.845617] ^ [ 38.845984] ffff88800e115b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.846502] ffff88800e115c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.847018] ================================================================== [ 38.847579] Disabling lock debugging due to kernel taint [ 40.605999] BUG: Bad rss-counter state mm:000000002e227906 type:MM_FILEPAGES val:33 [ 40.607105] BUG: Bad rss-counter state mm:000000002e227906 type:MM_ANONPAGES val:22 [ 41.172886] BUG: Bad rss-counter state mm:0000000001421a76 type:MM_FILEPAGES val:33 [ 41.174122] BUG: Bad rss-counter state mm:0000000001421a76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5337' (ECDSA) to the list of known hosts. 2023/06/20 16:33:41 fuzzer started 2023/06/20 16:33:41 dialing manager at localhost:36067 2023/06/20 16:33:41 checking machine... 2023/06/20 16:33:41 checking revisions... [ 41.830718] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:33:42 testing simple program... [ 41.878448] cgroup: Unknown subsys name 'net' [ 41.930673] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:33:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff810bd056 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864ec930 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000000607e R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 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 00007f7668e6f900 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=00007f76694270b0 CR3=000000000dfe8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 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=00007ffd9a17ce58 CR3=00000000160a4000 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=2031343a33333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a33333a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000