[ 31.555222] BUG: Bad rss-counter state mm:000000006dfab5c6 type:MM_FILEPAGES val:33 [ 31.557009] BUG: Bad rss-counter state mm:000000006dfab5c6 type:MM_ANONPAGES val:22 [ 31.719766] ================================================================== [ 31.720880] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.722057] Read of size 8 at addr ffff88800e357140 by task sshd/218 [ 31.723014] [ 31.723239] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.724135] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.725173] Call Trace: [ 31.725503] [ 31.725806] dump_stack_lvl+0x91/0xf0 [ 31.726320] print_report+0xcc/0x620 [ 31.726823] ? __virt_addr_valid+0x102/0x340 [ 31.727402] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.728043] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.728684] kasan_report+0xbe/0xf0 [ 31.729185] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.729850] vma_interval_tree_remove+0xc75/0xec0 [ 31.730490] vma_prepare+0xc54/0x11a0 [ 31.730988] __split_vma+0x5af/0x950 [ 31.731478] ? __pfx___split_vma+0x10/0x10 [ 31.732029] ? find_held_lock+0x2c/0x110 [ 31.732573] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.733160] ? lock_is_held_type+0x9f/0x120 [ 31.733739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.734376] ? mtree_range_walk+0x632/0x900 [ 31.734949] ? mas_walk+0x5c7/0x7c0 [ 31.735445] do_vmi_munmap+0x1f1/0x2b0 [ 31.735956] mmap_region+0x1f9/0x2660 [ 31.736459] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.736993] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.737757] ? __pfx_lock_acquire+0x10/0x10 [ 31.738313] ? __pfx_mmap_region+0x10/0x10 [ 31.738863] ? security_mmap_addr+0x7d/0xa0 [ 31.739420] ? get_unmapped_area+0x1f5/0x3f0 [ 31.739988] do_mmap+0x854/0xf00 [ 31.740441] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.740955] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.741533] ksys_mmap_pgoff+0x3af/0x500 [ 31.742089] do_syscall_64+0x3f/0x90 [ 31.742589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.743268] RIP: 0033:0x7f9a0ead8d82 [ 31.743740] 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 [ 31.745984] RSP: 002b:00007ffff7f63c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.746925] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a0ead8d82 [ 31.747814] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a0df12000 [ 31.748699] RBP: 00007f9a0df12000 R08: 0000000000000009 R09: 0000000000001000 [ 31.749598] R10: 0000000000000812 R11: 0000000000000206 R12: 000055edbd1aa980 [ 31.750477] R13: 00007ffff7f63c90 R14: 00007ffff7f63cc0 R15: 00007ffff7f64020 [ 31.751370] [ 31.751676] [ 31.751901] Allocated by task 210: [ 31.752350] kasan_save_stack+0x22/0x50 [ 31.752867] kasan_set_track+0x25/0x30 [ 31.753380] __kasan_slab_alloc+0x59/0x70 [ 31.753938] kmem_cache_alloc+0x16b/0x370 [ 31.754476] vm_area_dup+0x20/0x160 [ 31.754944] __split_vma+0x170/0x950 [ 31.755429] split_vma+0xc6/0x110 [ 31.755882] mprotect_fixup+0x8d2/0xb30 [ 31.756409] do_mprotect_pkey+0x87e/0xd40 [ 31.756957] __x64_sys_mprotect+0x78/0xc0 [ 31.757497] do_syscall_64+0x3f/0x90 [ 31.758002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.758679] [ 31.758897] Freed by task 210: [ 31.759307] kasan_save_stack+0x22/0x50 [ 31.759834] kasan_set_track+0x25/0x30 [ 31.760343] kasan_save_free_info+0x2b/0x50 [ 31.760896] __kasan_slab_free+0x10a/0x190 [ 31.761446] kmem_cache_free+0x10d/0x4d0 [ 31.762003] rcu_core+0x8c8/0x2860 [ 31.762461] __do_softirq+0x1b7/0x7d4 [ 31.762956] [ 31.763177] Last potentially related work creation: [ 31.763863] kasan_save_stack+0x22/0x50 [ 31.764388] __kasan_record_aux_stack+0x8e/0xa0 [ 31.764982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.765666] remove_vma+0x139/0x170 [ 31.766129] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.766714] do_vmi_munmap+0x1f1/0x2b0 [ 31.767218] __vm_munmap+0x138/0x3a0 [ 31.767706] __x64_sys_munmap+0x59/0x80 [ 31.768229] do_syscall_64+0x3f/0x90 [ 31.768728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.769388] [ 31.769627] Second to last potentially related work creation: [ 31.770326] kasan_save_stack+0x22/0x50 [ 31.770851] __kasan_record_aux_stack+0x8e/0xa0 [ 31.771450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.772111] remove_vma+0x139/0x170 [ 31.772577] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.773150] do_vmi_munmap+0x1f1/0x2b0 [ 31.773674] mmap_region+0x1f9/0x2660 [ 31.774175] do_mmap+0x854/0xf00 [ 31.774625] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.775129] ksys_mmap_pgoff+0x3af/0x500 [ 31.775650] do_syscall_64+0x3f/0x90 [ 31.776142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.776804] [ 31.777024] The buggy address belongs to the object at ffff88800e3570e8 [ 31.777024] which belongs to the cache vm_area_struct of size 168 [ 31.778562] The buggy address is located 88 bytes inside of [ 31.778562] freed 168-byte region [ffff88800e3570e8, ffff88800e357190) [ 31.780011] [ 31.780232] The buggy address belongs to the physical page: [ 31.780921] page:000000004c2bbd13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe357 [ 31.782044] memcg:ffff88800e19f101 [ 31.782479] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.783153] page_type: 0xffffffff() [ 31.783623] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bb8c0 dead000000000006 [ 31.784569] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e19f101 [ 31.785505] page dumped because: kasan: bad access detected [ 31.786211] [ 31.786431] Memory state around the buggy address: [ 31.787032] ffff88800e357000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.787907] ffff88800e357080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.788789] >ffff88800e357100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.789680] ^ [ 31.790348] ffff88800e357180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.791232] ffff88800e357200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.792109] ================================================================== [ 31.793061] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.609247] BUG: Bad rss-counter state mm:00000000db3adc31 type:MM_FILEPAGES val:33 [ 33.609946] BUG: Bad rss-counter state mm:00000000db3adc31 type:MM_ANONPAGES val:22 [ 33.961686] BUG: Bad rss-counter state mm:00000000c2d89de8 type:MM_FILEPAGES val:33 [ 33.962502] BUG: Bad rss-counter state mm:00000000c2d89de8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44705' (ECDSA) to the list of known hosts. 2023/06/21 07:42:55 fuzzer started 2023/06/21 07:42:55 dialing manager at localhost:36067 2023/06/21 07:42:55 checking machine... 2023/06/21 07:42:55 checking revisions... [ 34.756776] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:42:55 testing simple program... [ 34.804635] cgroup: Unknown subsys name 'net' [ 34.861912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:42:55 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=00007fe088a58880 CR3=000000000c9d6000 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=2034353a32343a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a32343a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002dd1f27 RSP=ffff888016e8f918 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffea0000362a80 R12=ffff88800cc2ae58 R13=ffffffff818468a3 R14=0000000000000000 R15=ffff8880084c6140 RIP=ffffffff8135b960 RFL=00000016 [----AP-] 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 00007f91c6f88900 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=00007f91c6f4d008 CR3=000000000fe20000 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