syzkaller login: [ 30.386041] BUG: Bad rss-counter state mm:00000000aa5835e5 type:MM_FILEPAGES val:33 [ 30.386994] BUG: Bad rss-counter state mm:00000000aa5835e5 type:MM_ANONPAGES val:22 [ 30.553748] ================================================================== [ 30.554866] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.556014] Read of size 8 at addr ffff88800ca2bc20 by task sshd/221 [ 30.556921] [ 30.557104] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.557830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.558666] Call Trace: [ 30.558943] [ 30.559187] dump_stack_lvl+0x91/0xf0 [ 30.559612] print_report+0xcc/0x620 [ 30.560043] ? __virt_addr_valid+0x102/0x340 [ 30.560541] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.561061] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.561579] kasan_report+0xbe/0xf0 [ 30.561975] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.562503] vma_interval_tree_remove+0xc75/0xec0 [ 30.563029] vma_prepare+0xc54/0x11a0 [ 30.563434] __split_vma+0x5af/0x950 [ 30.563825] ? __pfx___split_vma+0x10/0x10 [ 30.564271] ? find_held_lock+0x2c/0x110 [ 30.564706] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.565182] ? lock_is_held_type+0x9f/0x120 [ 30.565632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.566142] ? mtree_range_walk+0x632/0x900 [ 30.566608] ? mas_walk+0x5c7/0x7c0 [ 30.567007] do_vmi_munmap+0x1f1/0x2b0 [ 30.567425] mmap_region+0x1f9/0x2660 [ 30.567828] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.568279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.568879] ? __pfx_lock_acquire+0x10/0x10 [ 30.569327] ? __pfx_mmap_region+0x10/0x10 [ 30.569779] ? security_mmap_addr+0x7d/0xa0 [ 30.570230] ? get_unmapped_area+0x1f5/0x3f0 [ 30.570682] do_mmap+0x854/0xf00 [ 30.571049] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.571475] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.571954] ksys_mmap_pgoff+0x3af/0x500 [ 30.572406] do_syscall_64+0x3f/0x90 [ 30.572821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.573374] RIP: 0033:0x7f23c7bd0d82 [ 30.573770] 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 [ 30.575644] RSP: 002b:00007ffc0a87bce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.576450] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23c7bd0d82 [ 30.577180] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23c700a000 [ 30.577927] RBP: 00007f23c700a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.578660] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556131d24f70 [ 30.579397] R13: 00007ffc0a87bd00 R14: 00007ffc0a87bd30 R15: 00007ffc0a87c090 [ 30.580152] [ 30.580408] [ 30.580589] Allocated by task 213: [ 30.580955] kasan_save_stack+0x22/0x50 [ 30.581388] kasan_set_track+0x25/0x30 [ 30.581814] __kasan_slab_alloc+0x59/0x70 [ 30.582260] kmem_cache_alloc+0x16b/0x370 [ 30.582705] vm_area_dup+0x20/0x160 [ 30.583097] __split_vma+0x170/0x950 [ 30.583499] split_vma+0xc6/0x110 [ 30.583885] mprotect_fixup+0x8d2/0xb30 [ 30.584327] do_mprotect_pkey+0x87e/0xd40 [ 30.584774] __x64_sys_mprotect+0x78/0xc0 [ 30.585217] do_syscall_64+0x3f/0x90 [ 30.585619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.586170] [ 30.586361] Freed by task 19: [ 30.586690] kasan_save_stack+0x22/0x50 [ 30.587166] kasan_set_track+0x25/0x30 [ 30.587595] kasan_save_free_info+0x2b/0x50 [ 30.588081] __kasan_slab_free+0x10a/0x190 [ 30.588544] kmem_cache_free+0x10d/0x4d0 [ 30.588998] rcu_core+0x8c8/0x2860 [ 30.589388] __do_softirq+0x1b7/0x7d4 [ 30.589815] [ 30.590014] Last potentially related work creation: [ 30.590550] kasan_save_stack+0x22/0x50 [ 30.590996] __kasan_record_aux_stack+0x8e/0xa0 [ 30.591500] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.592070] remove_vma+0x139/0x170 [ 30.592462] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.592951] do_vmi_munmap+0x1f1/0x2b0 [ 30.593370] __vm_munmap+0x138/0x3a0 [ 30.593780] __x64_sys_munmap+0x59/0x80 [ 30.594215] do_syscall_64+0x3f/0x90 [ 30.594627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.595194] [ 30.595383] The buggy address belongs to the object at ffff88800ca2bbc8 [ 30.595383] which belongs to the cache vm_area_struct of size 168 [ 30.596733] The buggy address is located 88 bytes inside of [ 30.596733] freed 168-byte region [ffff88800ca2bbc8, ffff88800ca2bc70) [ 30.597981] [ 30.598170] The buggy address belongs to the physical page: [ 30.598745] page:0000000008238a01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca2b [ 30.599692] memcg:ffff88800eb24a01 [ 30.600058] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.600677] page_type: 0xffffffff() [ 30.601071] raw: 0100000000000200 ffff8880087a0c80 ffffea000030f340 dead000000000003 [ 30.601872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb24a01 [ 30.602665] page dumped because: kasan: bad access detected [ 30.603250] [ 30.603438] Memory state around the buggy address: [ 30.603949] ffff88800ca2bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.604696] ffff88800ca2bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.605443] >ffff88800ca2bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.606205] ^ [ 30.606665] ffff88800ca2bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.607408] ffff88800ca2bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.608162] ================================================================== [ 30.608966] Disabling lock debugging due to kernel taint [ 32.583726] BUG: Bad rss-counter state mm:00000000dbc6896e type:MM_FILEPAGES val:33 [ 32.585252] BUG: Bad rss-counter state mm:00000000dbc6896e type:MM_ANONPAGES val:22 [ 33.038900] BUG: Bad rss-counter state mm:00000000292fc1dd type:MM_FILEPAGES val:33 [ 33.040241] BUG: Bad rss-counter state mm:00000000292fc1dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11778' (ECDSA) to the list of known hosts. 2023/06/21 02:25:24 fuzzer started 2023/06/21 02:25:24 dialing manager at localhost:36067 2023/06/21 02:25:24 checking machine... 2023/06/21 02:25:24 checking revisions... [ 33.741292] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:25:24 testing simple program... [ 33.795437] cgroup: Unknown subsys name 'net' [ 33.838748] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:25:24 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=0000000080000000 RDX=ffff88800db51b40 RSI=ffffffff8148317e RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88801668fcb8 R8 =0000000000000005 R9 =0000000000000005 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffffffff854ee9e0 R15=0000000000000001 RIP=ffffffff814c0871 RFL=00000297 [--S-APC] 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 00007f93c608d900 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=00007f93c66450b0 CR3=00000000147d2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007fecdb39dff0 CR3=0000000015df8000 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=2033323a35323a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a35323a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000