syzkaller login: [ 40.328773] BUG: Bad rss-counter state mm:00000000b4d60ca7 type:MM_FILEPAGES val:33 [ 40.329766] BUG: Bad rss-counter state mm:00000000b4d60ca7 type:MM_ANONPAGES val:22 [ 40.504795] ================================================================== [ 40.505757] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.506739] Read of size 8 at addr ffff88800e43d880 by task sshd/220 [ 40.507643] [ 40.507877] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.508767] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.509799] Call Trace: [ 40.510125] [ 40.510430] dump_stack_lvl+0x91/0xf0 [ 40.510937] print_report+0xcc/0x620 [ 40.511443] ? __virt_addr_valid+0x102/0x340 [ 40.512026] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.512681] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.513333] kasan_report+0xbe/0xf0 [ 40.513826] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.514476] vma_interval_tree_remove+0xc75/0xec0 [ 40.515102] vma_prepare+0xc54/0x11a0 [ 40.515613] __split_vma+0x5af/0x950 [ 40.516104] ? __pfx___split_vma+0x10/0x10 [ 40.516661] ? find_held_lock+0x2c/0x110 [ 40.517210] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.517801] ? lock_is_held_type+0x9f/0x120 [ 40.518358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.518990] ? mtree_range_walk+0x632/0x900 [ 40.519564] ? mas_walk+0x5c7/0x7c0 [ 40.520062] do_vmi_munmap+0x1f1/0x2b0 [ 40.520594] mmap_region+0x1f9/0x2660 [ 40.521102] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.521635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.522371] ? __pfx_lock_acquire+0x10/0x10 [ 40.522938] ? __pfx_mmap_region+0x10/0x10 [ 40.523486] ? security_mmap_addr+0x7d/0xa0 [ 40.524035] ? get_unmapped_area+0x1f5/0x3f0 [ 40.524626] do_mmap+0x854/0xf00 [ 40.525080] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.525591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.526178] ksys_mmap_pgoff+0x3af/0x500 [ 40.526698] do_syscall_64+0x3f/0x90 [ 40.527184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.527858] RIP: 0033:0x7fe177f01d82 [ 40.528341] 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 [ 40.530554] RSP: 002b:00007ffded8dba58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.531503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe177f01d82 [ 40.532382] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe17733b000 [ 40.533264] RBP: 00007fe17733b000 R08: 0000000000000009 R09: 0000000000001000 [ 40.534133] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641ef012b20 [ 40.535011] R13: 00007ffded8dba70 R14: 00007ffded8dbaa0 R15: 00007ffded8dbe00 [ 40.535903] [ 40.536201] [ 40.536431] Allocated by task 213: [ 40.536887] kasan_save_stack+0x22/0x50 [ 40.537410] kasan_set_track+0x25/0x30 [ 40.537922] __kasan_slab_alloc+0x59/0x70 [ 40.538484] kmem_cache_alloc+0x16b/0x370 [ 40.539027] vm_area_dup+0x20/0x160 [ 40.539495] __split_vma+0x170/0x950 [ 40.539994] split_vma+0xc6/0x110 [ 40.540461] mprotect_fixup+0x8d2/0xb30 [ 40.541003] do_mprotect_pkey+0x87e/0xd40 [ 40.541548] __x64_sys_mprotect+0x78/0xc0 [ 40.542092] do_syscall_64+0x3f/0x90 [ 40.542582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.543246] [ 40.543471] Freed by task 213: [ 40.543888] kasan_save_stack+0x22/0x50 [ 40.544412] kasan_set_track+0x25/0x30 [ 40.544943] kasan_save_free_info+0x2b/0x50 [ 40.545492] __kasan_slab_free+0x10a/0x190 [ 40.546043] kmem_cache_free+0x10d/0x4d0 [ 40.546581] rcu_core+0x8c8/0x2860 [ 40.547045] __do_softirq+0x1b7/0x7d4 [ 40.547551] [ 40.547779] Last potentially related work creation: [ 40.548374] kasan_save_stack+0x22/0x50 [ 40.548908] __kasan_record_aux_stack+0x8e/0xa0 [ 40.549519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.550200] remove_vma+0x139/0x170 [ 40.550682] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.551255] do_vmi_munmap+0x1f1/0x2b0 [ 40.551755] __vm_munmap+0x138/0x3a0 [ 40.552252] __x64_sys_munmap+0x59/0x80 [ 40.552797] do_syscall_64+0x3f/0x90 [ 40.553289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.553962] [ 40.554181] Second to last potentially related work creation: [ 40.554899] kasan_save_stack+0x22/0x50 [ 40.555417] __kasan_record_aux_stack+0x8e/0xa0 [ 40.556019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.556695] remove_vma+0x139/0x170 [ 40.557168] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.557745] do_vmi_munmap+0x1f1/0x2b0 [ 40.558252] __vm_munmap+0x138/0x3a0 [ 40.558739] __x64_sys_munmap+0x59/0x80 [ 40.559259] do_syscall_64+0x3f/0x90 [ 40.559747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.560417] [ 40.560660] The buggy address belongs to the object at ffff88800e43d828 [ 40.560660] which belongs to the cache vm_area_struct of size 168 [ 40.562178] The buggy address is located 88 bytes inside of [ 40.562178] freed 168-byte region [ffff88800e43d828, ffff88800e43d8d0) [ 40.563634] [ 40.563852] The buggy address belongs to the physical page: [ 40.564547] page:00000000ddb47757 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe43d [ 40.565686] memcg:ffff888014037801 [ 40.566137] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.566857] page_type: 0xffffffff() [ 40.567339] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.568286] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014037801 [ 40.569243] page dumped because: kasan: bad access detected [ 40.569933] [ 40.570164] Memory state around the buggy address: [ 40.570765] ffff88800e43d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.571654] ffff88800e43d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.572581] >ffff88800e43d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.573476] ^ [ 40.573913] ffff88800e43d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.574800] ffff88800e43d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 40.575679] ================================================================== [ 40.576785] Disabling lock debugging due to kernel taint [ 42.539484] BUG: Bad rss-counter state mm:000000000952f51a type:MM_FILEPAGES val:33 [ 42.540417] BUG: Bad rss-counter state mm:000000000952f51a type:MM_ANONPAGES val:22 [ 43.027771] BUG: Bad rss-counter state mm:000000009a1ba120 type:MM_FILEPAGES val:33 [ 43.029080] BUG: Bad rss-counter state mm:000000009a1ba120 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56732' (ECDSA) to the list of known hosts. 2023/06/20 00:27:07 fuzzer started 2023/06/20 00:27:07 dialing manager at localhost:44161 2023/06/20 00:27:07 checking machine... 2023/06/20 00:27:07 checking revisions... [ 43.751373] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:27:07 testing simple program... [ 43.803844] cgroup: Unknown subsys name 'net' [ 43.839591] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:26:57 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=00007efdec8ee0e0 CR3=0000000019fc8000 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=2037303a37323a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a37323a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf09a98 RCX=ffffffff86137501 RDX=1ffff1100d9e135e RSI=0000000000000000 RDI=ffffffff8180cd09 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =ffffffff86137542 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015a3b680 R15=ffff88800f19bf80 RIP=ffffffff81130399 RFL=00000202 [-------] 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 00007f6f2ea4e900 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=00007f6f2ea2d020 CR3=0000000015986000 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=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