syzkaller login: [ 39.675142] BUG: Bad rss-counter state mm:00000000f5ec7db5 type:MM_FILEPAGES val:33 [ 39.675916] BUG: Bad rss-counter state mm:00000000f5ec7db5 type:MM_ANONPAGES val:22 [ 39.803480] ================================================================== [ 39.805184] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.806851] Read of size 8 at addr ffff88800d94b3f8 by task sshd/219 [ 39.808417] [ 39.808771] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.810435] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.812129] Call Trace: [ 39.812691] [ 39.813139] dump_stack_lvl+0x91/0xf0 [ 39.813967] print_report+0xcc/0x620 [ 39.814451] ? __virt_addr_valid+0x102/0x340 [ 39.814794] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.815165] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.815532] kasan_report+0xbe/0xf0 [ 39.815812] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.816226] vma_interval_tree_remove+0xc75/0xec0 [ 39.816593] vma_prepare+0xc54/0x11a0 [ 39.816886] __split_vma+0x5af/0x950 [ 39.817179] ? __pfx___split_vma+0x10/0x10 [ 39.817540] ? find_held_lock+0x2c/0x110 [ 39.817862] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.818214] ? lock_is_held_type+0x9f/0x120 [ 39.818545] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.818921] ? mtree_range_walk+0x632/0x900 [ 39.819255] ? mas_walk+0x5c7/0x7c0 [ 39.819541] do_vmi_munmap+0x1f1/0x2b0 [ 39.819845] mmap_region+0x1f9/0x2660 [ 39.820169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.820480] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.820924] ? __pfx_lock_acquire+0x10/0x10 [ 39.821305] ? __pfx_mmap_region+0x10/0x10 [ 39.821688] ? security_mmap_addr+0x7d/0xa0 [ 39.822067] ? get_unmapped_area+0x1f5/0x3f0 [ 39.822420] do_mmap+0x854/0xf00 [ 39.822708] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.823045] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.823438] ksys_mmap_pgoff+0x3af/0x500 [ 39.823748] do_syscall_64+0x3f/0x90 [ 39.824042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.824509] RIP: 0033:0x7f5401107d82 [ 39.824824] 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 [ 39.826478] RSP: 002b:00007ffe65e3cf48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.827000] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5401107d82 [ 39.827570] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5400541000 [ 39.828154] RBP: 00007f5400541000 R08: 0000000000000009 R09: 0000000000001000 [ 39.828716] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556617bb4ec0 [ 39.829248] R13: 00007ffe65e3cf60 R14: 00007ffe65e3cf90 R15: 00007ffe65e3d2f0 [ 39.829811] [ 39.829993] [ 39.830127] Allocated by task 212: [ 39.830390] kasan_save_stack+0x22/0x50 [ 39.830708] kasan_set_track+0x25/0x30 [ 39.831042] __kasan_slab_alloc+0x59/0x70 [ 39.831415] kmem_cache_alloc+0x16b/0x370 [ 39.831778] vm_area_dup+0x20/0x160 [ 39.832096] __split_vma+0x170/0x950 [ 39.832392] split_vma+0xc6/0x110 [ 39.832662] mprotect_fixup+0x8d2/0xb30 [ 39.832981] do_mprotect_pkey+0x87e/0xd40 [ 39.833324] __x64_sys_mprotect+0x78/0xc0 [ 39.833728] do_syscall_64+0x3f/0x90 [ 39.834045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.834475] [ 39.834608] Freed by task 202: [ 39.834850] kasan_save_stack+0x22/0x50 [ 39.835169] kasan_set_track+0x25/0x30 [ 39.835471] kasan_save_free_info+0x2b/0x50 [ 39.835829] __kasan_slab_free+0x10a/0x190 [ 39.836173] kmem_cache_free+0x10d/0x4d0 [ 39.836505] rcu_core+0x8c8/0x2860 [ 39.836790] __do_softirq+0x1b7/0x7d4 [ 39.837094] [ 39.837270] Last potentially related work creation: [ 39.837666] kasan_save_stack+0x22/0x50 [ 39.837986] __kasan_record_aux_stack+0x8e/0xa0 [ 39.838363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.838781] remove_vma+0x139/0x170 [ 39.839074] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.839443] do_vmi_munmap+0x1f1/0x2b0 [ 39.839760] __vm_munmap+0x138/0x3a0 [ 39.840064] __x64_sys_munmap+0x59/0x80 [ 39.840387] do_syscall_64+0x3f/0x90 [ 39.840699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.841116] [ 39.841260] The buggy address belongs to the object at ffff88800d94b3a0 [ 39.841260] which belongs to the cache vm_area_struct of size 168 [ 39.842260] The buggy address is located 88 bytes inside of [ 39.842260] freed 168-byte region [ffff88800d94b3a0, ffff88800d94b448) [ 39.843166] [ 39.843305] The buggy address belongs to the physical page: [ 39.843738] page:0000000079d9aecf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd94b [ 39.844439] memcg:ffff88800e991101 [ 39.844712] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.845130] page_type: 0xffffffff() [ 39.845422] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.846069] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e991101 [ 39.846656] page dumped because: kasan: bad access detected [ 39.847082] [ 39.847235] Memory state around the buggy address: [ 39.847626] ffff88800d94b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.848216] ffff88800d94b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.848752] >ffff88800d94b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.849327] ^ [ 39.849951] ffff88800d94b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.850559] ffff88800d94b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.851102] ================================================================== [ 39.851879] Disabling lock debugging due to kernel taint [ 41.730392] BUG: Bad rss-counter state mm:00000000aac2b2d4 type:MM_FILEPAGES val:33 [ 41.731111] BUG: Bad rss-counter state mm:00000000aac2b2d4 type:MM_ANONPAGES val:22 [ 42.086598] BUG: Bad rss-counter state mm:0000000041d82841 type:MM_FILEPAGES val:33 [ 42.087352] BUG: Bad rss-counter state mm:0000000041d82841 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4492' (ECDSA) to the list of known hosts. 2023/06/20 09:25:51 fuzzer started 2023/06/20 09:25:52 dialing manager at localhost:44161 2023/06/20 09:25:52 checking machine... 2023/06/20 09:25:52 checking revisions... [ 42.610587] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:25:52 testing simple program... [ 42.645261] cgroup: Unknown subsys name 'net' [ 42.680468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:25:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f62529b4000 CR3=000000000c704000 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=cc809580805fd694a54c9c2fc8a8761e XMM02=ec2efd57dc4c00df000000000011cad8 XMM03=627135a540bd8d20000000000011cba8 XMM04=818503f41f34667800000000000ae988 XMM05=dfcdbad4f1609c370000000000133af8 XMM06=0a1fac8af8bbc0570000000000132960 XMM07=e042d86d42eb936e0000000000124268 XMM08=627135a540bd8d20000000000011cba8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fbfbfbfbfbfbfbfb RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000000000fb RDI=ffffed100333359e RBP=ffffffff813782a8 RSP=ffff88806cf09e00 R8 =0000000000000178 R9 =0000000000000000 R10=ffffed1003333578 R11=00000000000b6996 R12=ffff88801999abc0 R13=ffff8880087b6500 R14=ffffffff813782a8 R15=ffff88800d9ffb80 RIP=ffffffff8450d452 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 00007f9964b65900 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=00007fffabb6f000 CR3=00000000162c0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000