syzkaller login: [ 31.598395] BUG: Bad rss-counter state mm:00000000804e8d42 type:MM_FILEPAGES val:33 [ 31.599422] BUG: Bad rss-counter state mm:00000000804e8d42 type:MM_ANONPAGES val:22 [ 31.764585] ================================================================== [ 31.765554] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.766541] Read of size 8 at addr ffff88800e782310 by task sshd/221 [ 31.767353] [ 31.767581] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.768539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.769570] Call Trace: [ 31.769919] [ 31.770210] dump_stack_lvl+0x91/0xf0 [ 31.770724] print_report+0xcc/0x620 [ 31.771228] ? __virt_addr_valid+0x102/0x340 [ 31.771794] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.772435] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.773087] kasan_report+0xbe/0xf0 [ 31.773581] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.774223] vma_interval_tree_remove+0xc75/0xec0 [ 31.774852] vma_prepare+0xc54/0x11a0 [ 31.775356] __split_vma+0x5af/0x950 [ 31.775850] ? __pfx___split_vma+0x10/0x10 [ 31.776400] ? find_held_lock+0x2c/0x110 [ 31.776939] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.777538] ? lock_is_held_type+0x9f/0x120 [ 31.778106] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.778730] ? mtree_range_walk+0x632/0x900 [ 31.779303] ? mas_walk+0x5c7/0x7c0 [ 31.779790] do_vmi_munmap+0x1f1/0x2b0 [ 31.780301] mmap_region+0x1f9/0x2660 [ 31.780804] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.781366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.782111] ? __pfx_lock_acquire+0x10/0x10 [ 31.782667] ? __pfx_mmap_region+0x10/0x10 [ 31.783223] ? security_mmap_addr+0x7d/0xa0 [ 31.783777] ? get_unmapped_area+0x1f5/0x3f0 [ 31.784357] do_mmap+0x854/0xf00 [ 31.784815] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.785341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.785928] ksys_mmap_pgoff+0x3af/0x500 [ 31.786458] do_syscall_64+0x3f/0x90 [ 31.786951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.787628] RIP: 0033:0x7f32b2b52d82 [ 31.788104] 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 [ 31.790333] RSP: 002b:00007ffde1fc5a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.791281] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32b2b52d82 [ 31.792166] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32b1f8c000 [ 31.793053] RBP: 00007f32b1f8c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.793933] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601082e4ec0 [ 31.794814] R13: 00007ffde1fc5a50 R14: 00007ffde1fc5a80 R15: 00007ffde1fc5de0 [ 31.795705] [ 31.796012] [ 31.796232] Allocated by task 214: [ 31.796679] kasan_save_stack+0x22/0x50 [ 31.797207] kasan_set_track+0x25/0x30 [ 31.797717] __kasan_slab_alloc+0x59/0x70 [ 31.798258] kmem_cache_alloc+0x16b/0x370 [ 31.798791] vm_area_dup+0x20/0x160 [ 31.799266] __split_vma+0x170/0x950 [ 31.799750] split_vma+0xc6/0x110 [ 31.800203] mprotect_fixup+0x8d2/0xb30 [ 31.800719] do_mprotect_pkey+0x87e/0xd40 [ 31.801277] __x64_sys_mprotect+0x78/0xc0 [ 31.801818] do_syscall_64+0x3f/0x90 [ 31.802312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.802982] [ 31.803206] Freed by task 214: [ 31.803618] kasan_save_stack+0x22/0x50 [ 31.804137] kasan_set_track+0x25/0x30 [ 31.804645] kasan_save_free_info+0x2b/0x50 [ 31.805209] __kasan_slab_free+0x10a/0x190 [ 31.805764] kmem_cache_free+0x10d/0x4d0 [ 31.806289] rcu_core+0x8c8/0x2860 [ 31.806753] __do_softirq+0x1b7/0x7d4 [ 31.807248] [ 31.807474] Last potentially related work creation: [ 31.808088] kasan_save_stack+0x22/0x50 [ 31.808614] __kasan_record_aux_stack+0x8e/0xa0 [ 31.809224] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.809887] remove_vma+0x139/0x170 [ 31.810356] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.810939] do_vmi_munmap+0x1f1/0x2b0 [ 31.811450] __vm_munmap+0x138/0x3a0 [ 31.811930] __x64_sys_munmap+0x59/0x80 [ 31.812446] do_syscall_64+0x3f/0x90 [ 31.812940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.813615] [ 31.813836] The buggy address belongs to the object at ffff88800e7822b8 [ 31.813836] which belongs to the cache vm_area_struct of size 168 [ 31.815355] The buggy address is located 88 bytes inside of [ 31.815355] freed 168-byte region [ffff88800e7822b8, ffff88800e782360) [ 31.816821] [ 31.817055] The buggy address belongs to the physical page: [ 31.817740] page:00000000b42e2312 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe782 [ 31.818873] memcg:ffff88800de58901 [ 31.819314] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.819992] page_type: 0xffffffff() [ 31.820454] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.821417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de58901 [ 31.822363] page dumped because: kasan: bad access detected [ 31.823050] [ 31.823271] Memory state around the buggy address: [ 31.823865] ffff88800e782200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.824755] ffff88800e782280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.825630] >ffff88800e782300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.826499] ^ [ 31.826961] ffff88800e782380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.827833] ffff88800e782400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.828708] ================================================================== [ 31.829688] Disabling lock debugging due to kernel taint [ 33.745406] BUG: Bad rss-counter state mm:0000000073d66fde type:MM_FILEPAGES val:33 [ 33.746368] BUG: Bad rss-counter state mm:0000000073d66fde type:MM_ANONPAGES val:22 [ 34.254936] BUG: Bad rss-counter state mm:0000000072d238b6 type:MM_FILEPAGES val:33 [ 34.256453] BUG: Bad rss-counter state mm:0000000072d238b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44132' (ECDSA) to the list of known hosts. 2023/06/21 04:42:58 fuzzer started 2023/06/21 04:42:58 dialing manager at localhost:36067 2023/06/21 04:42:58 checking machine... 2023/06/21 04:42:58 checking revisions... [ 34.989759] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:42:58 testing simple program... [ 35.051984] cgroup: Unknown subsys name 'net' [ 35.111861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:42:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f8909e6e290 CR3=0000000016712000 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=2037353a32343a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a32343a3430203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86098097 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000007 RDI=ffffffff85d92c20 RBP=ffff8880169b71b0 RSP=ffff8880169b7098 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff8880169b71b8 R13=ffff8880169b71a0 R14=ffff8880169b7199 R15=ffff8880169b7158 RIP=ffffffff81130a6e 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 00007fdc7bb87900 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=00007fdc7bb4c008 CR3=000000000c5e2000 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