[ 38.757424] BUG: Bad rss-counter state mm:00000000f26f6508 type:MM_FILEPAGES val:33 [ 38.759386] BUG: Bad rss-counter state mm:00000000f26f6508 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.891783] ================================================================== [ 38.892375] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.892997] Read of size 8 at addr ffff88800c5a4b38 by task sshd/221 [ 38.893477] [ 38.893637] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.894342] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.895006] Call Trace: [ 38.895223] [ 38.895514] dump_stack_lvl+0x91/0xf0 [ 38.895801] print_report+0xcc/0x620 [ 38.896079] ? __virt_addr_valid+0x102/0x340 [ 38.896452] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896886] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897556] kasan_report+0xbe/0xf0 [ 38.897848] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.898267] vma_interval_tree_remove+0xc75/0xec0 [ 38.898651] vma_prepare+0xc54/0x11a0 [ 38.898966] __split_vma+0x5af/0x950 [ 38.899271] ? __pfx___split_vma+0x10/0x10 [ 38.899541] ? find_held_lock+0x2c/0x110 [ 38.899803] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.900112] ? lock_is_held_type+0x9f/0x120 [ 38.900448] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.900771] ? mtree_range_walk+0x632/0x900 [ 38.901149] ? mas_walk+0x5c7/0x7c0 [ 38.901445] do_vmi_munmap+0x1f1/0x2b0 [ 38.901769] mmap_region+0x1f9/0x2660 [ 38.902113] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.902449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.902919] ? __pfx_lock_acquire+0x10/0x10 [ 38.903272] ? __pfx_mmap_region+0x10/0x10 [ 38.903635] ? security_mmap_addr+0x7d/0xa0 [ 38.903987] ? get_unmapped_area+0x1f5/0x3f0 [ 38.904343] do_mmap+0x854/0xf00 [ 38.904635] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.904955] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.905320] ksys_mmap_pgoff+0x3af/0x500 [ 38.905653] do_syscall_64+0x3f/0x90 [ 38.905993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906418] RIP: 0033:0x7f3a19e25d82 [ 38.906725] 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 [ 38.907987] RSP: 002b:00007ffc95d1aa98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.908460] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a19e25d82 [ 38.908884] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a1925f000 [ 38.909334] RBP: 00007f3a1925f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909763] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597a9b09f70 [ 38.910263] R13: 00007ffc95d1aab0 R14: 00007ffc95d1aae0 R15: 00007ffc95d1ae40 [ 38.910807] [ 38.911005] [ 38.911178] Allocated by task 214: [ 38.911452] kasan_save_stack+0x22/0x50 [ 38.911865] kasan_set_track+0x25/0x30 [ 38.912200] __kasan_slab_alloc+0x59/0x70 [ 38.912554] kmem_cache_alloc+0x16b/0x370 [ 38.912957] vm_area_dup+0x20/0x160 [ 38.913228] __split_vma+0x170/0x950 [ 38.913523] split_vma+0xc6/0x110 [ 38.913812] mprotect_fixup+0x8d2/0xb30 [ 38.914161] do_mprotect_pkey+0x87e/0xd40 [ 38.914522] __x64_sys_mprotect+0x78/0xc0 [ 38.914877] do_syscall_64+0x3f/0x90 [ 38.915187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.915651] [ 38.915812] Freed by task 13: [ 38.916113] kasan_save_stack+0x22/0x50 [ 38.916469] kasan_set_track+0x25/0x30 [ 38.916779] kasan_save_free_info+0x2b/0x50 [ 38.917135] __kasan_slab_free+0x10a/0x190 [ 38.917517] kmem_cache_free+0x10d/0x4d0 [ 38.917830] rcu_core+0x8c8/0x2860 [ 38.918128] __do_softirq+0x1b7/0x7d4 [ 38.918518] [ 38.918679] Last potentially related work creation: [ 38.919068] kasan_save_stack+0x22/0x50 [ 38.919432] __kasan_record_aux_stack+0x8e/0xa0 [ 38.919842] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.920248] remove_vma+0x139/0x170 [ 38.920549] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.920941] do_vmi_munmap+0x1f1/0x2b0 [ 38.921289] __vm_munmap+0x138/0x3a0 [ 38.921641] __x64_sys_munmap+0x59/0x80 [ 38.921987] do_syscall_64+0x3f/0x90 [ 38.922360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.922841] [ 38.923001] Second to last potentially related work creation: [ 38.923489] kasan_save_stack+0x22/0x50 [ 38.923792] __kasan_record_aux_stack+0x8e/0xa0 [ 38.924270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924776] remove_vma+0x139/0x170 [ 38.925091] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925470] do_vmi_munmap+0x1f1/0x2b0 [ 38.925798] mmap_region+0x1f9/0x2660 [ 38.926113] do_mmap+0x854/0xf00 [ 38.926468] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.926794] ksys_mmap_pgoff+0x7d/0x500 [ 38.927122] do_syscall_64+0x3f/0x90 [ 38.927442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927889] [ 38.928043] The buggy address belongs to the object at ffff88800c5a4ae0 [ 38.928043] which belongs to the cache vm_area_struct of size 168 [ 38.929028] The buggy address is located 88 bytes inside of [ 38.929028] freed 168-byte region [ffff88800c5a4ae0, ffff88800c5a4b88) [ 38.930034] [ 38.930226] The buggy address belongs to the physical page: [ 38.930714] page:000000003436fdf5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5a4 [ 38.931509] memcg:ffff88800c64f301 [ 38.931824] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.932315] page_type: 0xffffffff() [ 38.932651] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388580 dead000000000007 [ 38.933432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c64f301 [ 38.934282] page dumped because: kasan: bad access detected [ 38.934902] [ 38.935093] Memory state around the buggy address: [ 38.935620] ffff88800c5a4a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.936375] ffff88800c5a4a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.937144] >ffff88800c5a4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.937848] ^ [ 38.938321] ffff88800c5a4b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.938868] ffff88800c5a4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.939434] ================================================================== [ 38.940397] Disabling lock debugging due to kernel taint [ 41.089941] BUG: Bad rss-counter state mm:000000007bfa17c2 type:MM_FILEPAGES val:33 [ 41.091201] BUG: Bad rss-counter state mm:000000007bfa17c2 type:MM_ANONPAGES val:22 [ 41.584755] BUG: Bad rss-counter state mm:000000007d0237cb type:MM_FILEPAGES val:33 [ 41.585464] BUG: Bad rss-counter state mm:000000007d0237cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55808' (ECDSA) to the list of known hosts. 2023/06/21 00:04:58 fuzzer started 2023/06/21 00:04:58 dialing manager at localhost:36067 2023/06/21 00:04:58 checking machine... 2023/06/21 00:04:58 checking revisions... [ 42.180649] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:04:58 testing simple program... [ 42.232671] cgroup: Unknown subsys name 'net' [ 42.299314] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:04:58 Registers: info registers vcpu 0 RAX=ffffffff864b2f43 RBX=0000000000000002 RCX=ffffffff864b2f3e RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff8604f5d8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b2f26 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a7b 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 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=00007f69e82ce328 CR3=000000000f93c000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f54548b7960 CR3=000000000c654000 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=2038353a34303a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a34303a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000