[ 61.653091] BUG: Bad rss-counter state mm:00000000db2d06ad type:MM_FILEPAGES val:33 [ 61.654274] BUG: Bad rss-counter state mm:00000000db2d06ad type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 61.782332] ================================================================== [ 61.783229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.784161] Read of size 8 at addr ffff888017e6aed8 by task sshd/225 [ 61.784921] [ 61.785136] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.786153] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.787108] Call Trace: [ 61.787422] [ 61.787737] dump_stack_lvl+0x91/0xf0 [ 61.788223] print_report+0xcc/0x620 [ 61.788702] ? __virt_addr_valid+0x102/0x340 [ 61.789251] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.789859] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.790465] kasan_report+0xbe/0xf0 [ 61.790933] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.791550] vma_interval_tree_remove+0xc75/0xec0 [ 61.792140] vma_prepare+0xc54/0x11a0 [ 61.792612] __split_vma+0x5af/0x950 [ 61.793073] ? __pfx___split_vma+0x10/0x10 [ 61.793590] ? find_held_lock+0x2c/0x110 [ 61.794103] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.794660] ? lock_is_held_type+0x9f/0x120 [ 61.795196] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.795802] ? mtree_range_walk+0x632/0x900 [ 61.796348] ? mas_walk+0x5c7/0x7c0 [ 61.796817] do_vmi_munmap+0x1f1/0x2b0 [ 61.797302] mmap_region+0x1f9/0x2660 [ 61.797776] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.798285] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.798987] ? __pfx_lock_acquire+0x10/0x10 [ 61.799525] ? __pfx_mmap_region+0x10/0x10 [ 61.800051] ? security_mmap_addr+0x7d/0xa0 [ 61.800581] ? get_unmapped_area+0x1f5/0x3f0 [ 61.801120] do_mmap+0x854/0xf00 [ 61.801558] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.802041] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.802595] ksys_mmap_pgoff+0x3af/0x500 [ 61.803097] do_syscall_64+0x3f/0x90 [ 61.803580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.804223] RIP: 0033:0x7fa35a57fd82 [ 61.804670] 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 [ 61.806761] RSP: 002b:00007fff3f12f7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.807673] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa35a57fd82 [ 61.808594] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3599b9000 [ 61.809526] RBP: 00007fa3599b9000 R08: 0000000000000009 R09: 0000000000001000 [ 61.810450] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621c4f4cec0 [ 61.811403] R13: 00007fff3f12f7d0 R14: 00007fff3f12f800 R15: 00007fff3f12fb60 [ 61.812358] [ 61.812676] [ 61.812909] Allocated by task 218: [ 61.813386] kasan_save_stack+0x22/0x50 [ 61.813934] kasan_set_track+0x25/0x30 [ 61.814466] __kasan_slab_alloc+0x59/0x70 [ 61.815029] kmem_cache_alloc+0x16b/0x370 [ 61.815597] vm_area_dup+0x20/0x160 [ 61.816180] __split_vma+0x170/0x950 [ 61.816652] split_vma+0xc6/0x110 [ 61.817089] mprotect_fixup+0x8d2/0xb30 [ 61.817586] do_mprotect_pkey+0x87e/0xd40 [ 61.818101] __x64_sys_mprotect+0x78/0xc0 [ 61.818613] do_syscall_64+0x3f/0x90 [ 61.819086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.819733] [ 61.819947] Freed by task 218: [ 61.820337] kasan_save_stack+0x22/0x50 [ 61.820845] kasan_set_track+0x25/0x30 [ 61.821336] kasan_save_free_info+0x2b/0x50 [ 61.821863] __kasan_slab_free+0x10a/0x190 [ 61.822389] kmem_cache_free+0x10d/0x4d0 [ 61.822892] rcu_core+0x8c8/0x2860 [ 61.823332] __do_softirq+0x1b7/0x7d4 [ 61.823826] [ 61.824040] Last potentially related work creation: [ 61.824617] kasan_save_stack+0x22/0x50 [ 61.825117] __kasan_record_aux_stack+0x8e/0xa0 [ 61.825684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.826319] remove_vma+0x139/0x170 [ 61.826851] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.827400] do_vmi_munmap+0x1f1/0x2b0 [ 61.827893] __vm_munmap+0x138/0x3a0 [ 61.828359] __x64_sys_munmap+0x59/0x80 [ 61.828850] do_syscall_64+0x3f/0x90 [ 61.829324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.829963] [ 61.830181] The buggy address belongs to the object at ffff888017e6ae80 [ 61.830181] which belongs to the cache vm_area_struct of size 168 [ 61.831645] The buggy address is located 88 bytes inside of [ 61.831645] freed 168-byte region [ffff888017e6ae80, ffff888017e6af28) [ 61.833040] [ 61.833259] The buggy address belongs to the physical page: [ 61.833911] page:000000008f845376 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e6a [ 61.834997] memcg:ffff88800f2cd601 [ 61.835419] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.836074] page_type: 0xffffffff() [ 61.836520] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.837445] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2cd601 [ 61.838358] page dumped because: kasan: bad access detected [ 61.839017] [ 61.839231] Memory state around the buggy address: [ 61.839817] ffff888017e6ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.840663] ffff888017e6ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 61.841510] >ffff888017e6ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.842344] ^ [ 61.843075] ffff888017e6af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 61.843940] ffff888017e6af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.844786] ================================================================== [ 61.845713] Disabling lock debugging due to kernel taint [ 64.114242] BUG: Bad rss-counter state mm:0000000082165315 type:MM_FILEPAGES val:33 [ 64.115631] BUG: Bad rss-counter state mm:0000000082165315 type:MM_ANONPAGES val:22 [ 64.618091] BUG: Bad rss-counter state mm:00000000c42978ea type:MM_FILEPAGES val:33 [ 64.619250] BUG: Bad rss-counter state mm:00000000c42978ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18636' (ECDSA) to the list of known hosts. 2023/06/20 15:58:43 fuzzer started 2023/06/20 15:58:44 dialing manager at localhost:36067 2023/06/20 15:58:44 checking machine... 2023/06/20 15:58:44 checking revisions... [ 65.302350] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:58:44 testing simple program... [ 65.349573] cgroup: Unknown subsys name 'net' [ 65.385930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:58:43 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=0000000000000001 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=00007ffe263efc08 CR3=0000000005482000 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=00007efc7b8d85100000562c94892790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028f0ede RSI=ffffffff818ad74a RDI=ffff888014787760 RBP=ffff888014787730 RSP=ffff888014787690 R8 =0000000000000001 R9 =ffff8880147876d8 R10=0000000000038001 R11=000000000002384c R12=ffff888014787760 R13=0000000000000000 R14=ffff888014788000 R15=0000000000000dc0 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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 00007f6edb42b900 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=00007fe804e77650 CR3=000000000ca8c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c92438956b9e69da00000000000ae988 XMM05=3203015a31b340b30000000000132298 XMM06=ae9b264101391a5b0000000000130d18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000