[ 85.626449] BUG: Bad rss-counter state mm:00000000bdbe6ac5 type:MM_FILEPAGES val:33 [ 85.627534] BUG: Bad rss-counter state mm:00000000bdbe6ac5 type:MM_ANONPAGES val:22 [ 85.805233] ================================================================== [ 85.806213] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 85.807357] Read of size 8 at addr ffff88800dbeb228 by task sshd/219 [ 85.808201] [ 85.808445] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 85.809581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 85.810633] Call Trace: [ 85.810981] [ 85.811314] dump_stack_lvl+0x91/0xf0 [ 85.811848] print_report+0xcc/0x620 [ 85.812364] ? __virt_addr_valid+0x102/0x340 [ 85.812964] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.813624] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.814293] kasan_report+0xbe/0xf0 [ 85.814823] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.815526] vma_interval_tree_remove+0xc75/0xec0 [ 85.816204] vma_prepare+0xc54/0x11a0 [ 85.816741] __split_vma+0x5af/0x950 [ 85.817272] ? __pfx___split_vma+0x10/0x10 [ 85.817867] ? find_held_lock+0x2c/0x110 [ 85.818446] do_vmi_align_munmap+0x2ba/0x11f0 [ 85.819077] ? lock_is_held_type+0x9f/0x120 [ 85.819686] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 85.820363] ? mtree_range_walk+0x632/0x900 [ 85.820982] ? mas_walk+0x5c7/0x7c0 [ 85.821516] do_vmi_munmap+0x1f1/0x2b0 [ 85.822069] mmap_region+0x1f9/0x2660 [ 85.822610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 85.823187] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 85.824005] ? __pfx_lock_acquire+0x10/0x10 [ 85.824599] ? __pfx_mmap_region+0x10/0x10 [ 85.825187] ? security_mmap_addr+0x7d/0xa0 [ 85.825785] ? get_unmapped_area+0x1f5/0x3f0 [ 85.826395] do_mmap+0x854/0xf00 [ 85.826882] vm_mmap_pgoff+0x1a6/0x3a0 [ 85.827434] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 85.828055] ksys_mmap_pgoff+0x3af/0x500 [ 85.828611] do_syscall_64+0x3f/0x90 [ 85.829141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.829870] RIP: 0033:0x7f2cd1f65d82 [ 85.830378] 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 [ 85.832767] RSP: 002b:00007ffe0e5718c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 85.833773] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2cd1f65d82 [ 85.834715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2cd139f000 [ 85.835664] RBP: 00007f2cd139f000 R08: 0000000000000009 R09: 0000000000001000 [ 85.836604] R10: 0000000000000812 R11: 0000000000000206 R12: 000055568ba10ec0 [ 85.837545] R13: 00007ffe0e5718e0 R14: 00007ffe0e571910 R15: 00007ffe0e571c70 [ 85.838488] [ 85.838803] [ 85.839040] Allocated by task 212: [ 85.839516] kasan_save_stack+0x22/0x50 [ 85.840068] kasan_set_track+0x25/0x30 [ 85.840606] __kasan_slab_alloc+0x59/0x70 [ 85.841179] kmem_cache_alloc+0x16b/0x370 [ 85.841746] vm_area_dup+0x20/0x160 [ 85.842246] __split_vma+0x170/0x950 [ 85.842756] split_vma+0xc6/0x110 [ 85.843260] mprotect_fixup+0x8d2/0xb30 [ 85.843805] do_mprotect_pkey+0x87e/0xd40 [ 85.844378] __x64_sys_mprotect+0x78/0xc0 [ 85.844957] do_syscall_64+0x3f/0x90 [ 85.845477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.846189] [ 85.846419] Freed by task 212: [ 85.846853] kasan_save_stack+0x22/0x50 [ 85.847421] kasan_set_track+0x25/0x30 [ 85.847964] kasan_save_free_info+0x2b/0x50 [ 85.848549] __kasan_slab_free+0x10a/0x190 [ 85.849132] kmem_cache_free+0x10d/0x4d0 [ 85.849685] rcu_core+0x8c8/0x2860 [ 85.850173] __do_softirq+0x1b7/0x7d4 [ 85.850703] [ 85.850935] Last potentially related work creation: [ 85.851564] kasan_save_stack+0x22/0x50 [ 85.852111] __kasan_record_aux_stack+0x8e/0xa0 [ 85.852733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 85.853431] remove_vma+0x139/0x170 [ 85.853921] do_vmi_align_munmap+0xd4a/0x11f0 [ 85.854525] do_vmi_munmap+0x1f1/0x2b0 [ 85.855054] __vm_munmap+0x138/0x3a0 [ 85.855563] __x64_sys_munmap+0x59/0x80 [ 85.856101] do_syscall_64+0x3f/0x90 [ 85.856614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.857304] [ 85.857530] The buggy address belongs to the object at ffff88800dbeb1d0 [ 85.857530] which belongs to the cache vm_area_struct of size 168 [ 85.859115] The buggy address is located 88 bytes inside of [ 85.859115] freed 168-byte region [ffff88800dbeb1d0, ffff88800dbeb278) [ 85.860633] [ 85.860870] The buggy address belongs to the physical page: [ 85.861568] page:00000000585f74d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbeb [ 85.862737] memcg:ffff88800cbd6801 [ 85.863201] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 85.863964] page_type: 0xffffffff() [ 85.864450] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 85.865436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbd6801 [ 85.866408] page dumped because: kasan: bad access detected [ 85.867119] [ 85.867357] Memory state around the buggy address: [ 85.867971] ffff88800dbeb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 85.868897] ffff88800dbeb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 85.869815] >ffff88800dbeb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 85.870728] ^ [ 85.871344] ffff88800dbeb280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 85.872254] ffff88800dbeb300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 85.873159] ================================================================== [ 85.874176] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 88.537025] BUG: Bad rss-counter state mm:00000000ee800e12 type:MM_FILEPAGES val:33 [ 88.538078] BUG: Bad rss-counter state mm:00000000ee800e12 type:MM_ANONPAGES val:22 [ 89.044213] BUG: Bad rss-counter state mm:0000000070e9a1f2 type:MM_FILEPAGES val:33 [ 89.045733] BUG: Bad rss-counter state mm:0000000070e9a1f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25511' (ECDSA) to the list of known hosts. 2023/06/19 23:13:59 fuzzer started 2023/06/19 23:13:59 dialing manager at localhost:44161 2023/06/19 23:13:59 checking machine... 2023/06/19 23:13:59 checking revisions... [ 89.754620] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:14:00 testing simple program... [ 89.809531] cgroup: Unknown subsys name 'net' [ 89.867627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:13:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001b1f RCX=ffffffff81b25dbc RDX=ffff888009031b40 RSI=0000000000001b1f RDI=00000000000010dc RBP=00000000000010dc RSP=ffff8880090571e8 R8 =0000000000000005 R9 =0000000000000000 R10=00000000000000dc R11=0000000000000128 R12=0000000000000001 R13=ffff888009057638 R14=0000000000001b1f R15=00000000000000db RIP=ffffffff814c02c8 RFL=00000293 [--S-A-C] 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 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=00007fe6fb58bf00 CR3=000000000df84000 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=33313a3332203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303833 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8612813c RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86128140 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000001e4e6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800ff8ff40 R15=ffff88806cf09a98 RIP=ffffffff81131153 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 00007f4b4ec04900 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=00007f4b4ebe3020 CR3=000000000f65e000 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