[ 28.003050] BUG: Bad rss-counter state mm:00000000033b4020 type:MM_FILEPAGES val:33 [ 28.003839] BUG: Bad rss-counter state mm:00000000033b4020 type:MM_ANONPAGES val:22 [ 28.134184] ================================================================== [ 28.135254] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.136383] Read of size 8 at addr ffff88800db6c3f8 by task sshd/219 [ 28.137288] [ 28.137464] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.138160] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.138937] Call Trace: [ 28.139209] [ 28.139434] dump_stack_lvl+0x91/0xf0 [ 28.139829] print_report+0xcc/0x620 [ 28.140217] ? __virt_addr_valid+0x102/0x340 [ 28.140670] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.141170] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.141664] kasan_report+0xbe/0xf0 [ 28.142044] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.142542] vma_interval_tree_remove+0xc75/0xec0 [ 28.143025] vma_prepare+0xc54/0x11a0 [ 28.143414] __split_vma+0x5af/0x950 [ 28.143796] ? __pfx___split_vma+0x10/0x10 [ 28.144222] ? find_held_lock+0x2c/0x110 [ 28.144645] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.145103] ? lock_is_held_type+0x9f/0x120 [ 28.145543] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.146034] ? mtree_range_walk+0x632/0x900 [ 28.146482] ? mas_walk+0x5c7/0x7c0 [ 28.146864] do_vmi_munmap+0x1f1/0x2b0 [ 28.147266] mmap_region+0x1f9/0x2660 [ 28.147657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.148080] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.148677] ? __pfx_lock_acquire+0x10/0x10 [ 28.149107] ? __pfx_mmap_region+0x10/0x10 [ 28.149531] ? security_mmap_addr+0x7d/0xa0 [ 28.149962] ? get_unmapped_area+0x1f5/0x3f0 [ 28.150407] do_mmap+0x854/0xf00 [ 28.150764] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.151164] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.151619] ksys_mmap_pgoff+0x3af/0x500 [ 28.152033] do_syscall_64+0x3f/0x90 [ 28.152418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.152946] RIP: 0033:0x7fa0c0118d82 [ 28.153317] 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 [ 28.155034] RSP: 002b:00007ffd91a6d0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.155763] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0c0118d82 [ 28.156451] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0bf552000 [ 28.157145] RBP: 00007fa0bf552000 R08: 0000000000000009 R09: 0000000000001000 [ 28.157835] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9e89dbec0 [ 28.158519] R13: 00007ffd91a6d100 R14: 00007ffd91a6d130 R15: 00007ffd91a6d490 [ 28.159207] [ 28.159442] [ 28.159614] Allocated by task 210: [ 28.159957] kasan_save_stack+0x22/0x50 [ 28.160363] kasan_set_track+0x25/0x30 [ 28.160779] __kasan_slab_alloc+0x59/0x70 [ 28.161199] kmem_cache_alloc+0x16b/0x370 [ 28.161616] vm_area_dup+0x20/0x160 [ 28.161983] __split_vma+0x170/0x950 [ 28.162359] split_vma+0xc6/0x110 [ 28.162708] mprotect_fixup+0x8d2/0xb30 [ 28.163114] do_mprotect_pkey+0x87e/0xd40 [ 28.163535] __x64_sys_mprotect+0x78/0xc0 [ 28.163957] do_syscall_64+0x3f/0x90 [ 28.164338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.164857] [ 28.165032] Freed by task 202: [ 28.165345] kasan_save_stack+0x22/0x50 [ 28.165750] kasan_set_track+0x25/0x30 [ 28.166148] kasan_save_free_info+0x2b/0x50 [ 28.166577] __kasan_slab_free+0x10a/0x190 [ 28.167010] kmem_cache_free+0x10d/0x4d0 [ 28.167418] rcu_core+0x8c8/0x2860 [ 28.167773] __do_softirq+0x1b7/0x7d4 [ 28.168155] [ 28.168329] Last potentially related work creation: [ 28.168818] kasan_save_stack+0x22/0x50 [ 28.169221] __kasan_record_aux_stack+0x8e/0xa0 [ 28.169687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.170209] remove_vma+0x139/0x170 [ 28.170575] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.171024] do_vmi_munmap+0x1f1/0x2b0 [ 28.171420] __vm_munmap+0x138/0x3a0 [ 28.171797] __x64_sys_munmap+0x59/0x80 [ 28.172197] do_syscall_64+0x3f/0x90 [ 28.172575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.173097] [ 28.173268] Second to last potentially related work creation: [ 28.173820] kasan_save_stack+0x22/0x50 [ 28.174227] __kasan_record_aux_stack+0x8e/0xa0 [ 28.174684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.175207] remove_vma+0x139/0x170 [ 28.175570] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.176017] do_vmi_munmap+0x1f1/0x2b0 [ 28.176406] mmap_region+0x1f9/0x2660 [ 28.176797] do_mmap+0x854/0xf00 [ 28.177147] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.177538] ksys_mmap_pgoff+0x3af/0x500 [ 28.177939] do_syscall_64+0x3f/0x90 [ 28.178320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.178836] [ 28.179008] The buggy address belongs to the object at ffff88800db6c3a0 [ 28.179008] which belongs to the cache vm_area_struct of size 168 [ 28.180191] The buggy address is located 88 bytes inside of [ 28.180191] freed 168-byte region [ffff88800db6c3a0, ffff88800db6c448) [ 28.181344] [ 28.181516] The buggy address belongs to the physical page: [ 28.182050] page:000000007ce57f3e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb6c [ 28.182919] memcg:ffff88800dadad01 [ 28.183269] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.183833] page_type: 0xffffffff() [ 28.184197] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 28.184947] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dadad01 [ 28.185683] page dumped because: kasan: bad access detected [ 28.186213] [ 28.186387] Memory state around the buggy address: [ 28.186856] ffff88800db6c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.187551] ffff88800db6c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.188240] >ffff88800db6c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.188933] ^ [ 28.189616] ffff88800db6c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.190308] ffff88800db6c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.190988] ================================================================== [ 28.191756] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.420173] BUG: Bad rss-counter state mm:000000006712569d type:MM_FILEPAGES val:33 [ 30.420967] BUG: Bad rss-counter state mm:000000006712569d type:MM_ANONPAGES val:22 [ 30.845417] BUG: Bad rss-counter state mm:0000000048c4d721 type:MM_FILEPAGES val:33 [ 30.846703] BUG: Bad rss-counter state mm:0000000048c4d721 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15195' (ECDSA) to the list of known hosts. 2023/06/20 06:46:20 fuzzer started 2023/06/20 06:46:20 dialing manager at localhost:44161 2023/06/20 06:46:20 checking machine... 2023/06/20 06:46:20 checking revisions... [ 31.489060] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:46:20 testing simple program... [ 31.540664] cgroup: Unknown subsys name 'net' [ 31.575708] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:46:15 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=0000000000000000 RCX=0000000080000101 RDX=ffffffff8542a6c0 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff88800e2b6b30 RIP=ffffffff814c07f1 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 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=00007f9f2abf8a40 CR3=000000000dbba000 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=2039313a36343a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a36343a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801c5df41c RCX=0000000000000000 RDX=ffff88800edcb680 RSI=ffffffff8449efca RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019dc7048 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff8880182f8040 R14=0000000000000000 R15=00007f40e378cfff RIP=ffffffff814c081b 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 00007f40e33c7900 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=00007f40e3364008 CR3=000000000df50000 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