[ 40.541667] BUG: Bad rss-counter state mm:0000000030915987 type:MM_FILEPAGES val:33 [ 40.542983] BUG: Bad rss-counter state mm:0000000030915987 type:MM_ANONPAGES val:22 [ 40.700346] ================================================================== [ 40.701237] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.702141] Read of size 8 at addr ffff88800d5f94e0 by task sshd/219 [ 40.702901] [ 40.703120] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.704134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.705094] Call Trace: [ 40.705414] [ 40.705698] dump_stack_lvl+0x91/0xf0 [ 40.706194] print_report+0xcc/0x620 [ 40.706708] ? __virt_addr_valid+0x102/0x340 [ 40.707258] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.707864] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.708475] kasan_report+0xbe/0xf0 [ 40.708956] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.709563] vma_interval_tree_remove+0xc75/0xec0 [ 40.710168] vma_prepare+0xc54/0x11a0 [ 40.710670] __split_vma+0x5af/0x950 [ 40.711146] ? __pfx___split_vma+0x10/0x10 [ 40.711670] ? find_held_lock+0x2c/0x110 [ 40.712191] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.712752] ? lock_is_held_type+0x9f/0x120 [ 40.713285] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.713889] ? mtree_range_walk+0x632/0x900 [ 40.714446] ? mas_walk+0x5c7/0x7c0 [ 40.714924] do_vmi_munmap+0x1f1/0x2b0 [ 40.715412] mmap_region+0x1f9/0x2660 [ 40.715896] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.716402] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.717111] ? __pfx_lock_acquire+0x10/0x10 [ 40.717636] ? __pfx_mmap_region+0x10/0x10 [ 40.718168] ? security_mmap_addr+0x7d/0xa0 [ 40.718723] ? get_unmapped_area+0x1f5/0x3f0 [ 40.719270] do_mmap+0x854/0xf00 [ 40.719707] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.720196] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.720759] ksys_mmap_pgoff+0x3af/0x500 [ 40.721264] do_syscall_64+0x3f/0x90 [ 40.721743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.722389] RIP: 0033:0x7f86f03c9d82 [ 40.722844] 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 [ 40.724915] RSP: 002b:00007ffd9f429338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.725810] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f86f03c9d82 [ 40.726684] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f86ef803000 [ 40.727510] RBP: 00007f86ef803000 R08: 0000000000000009 R09: 0000000000001000 [ 40.728349] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0fea1dec0 [ 40.729189] R13: 00007ffd9f429350 R14: 00007ffd9f429380 R15: 00007ffd9f4296e0 [ 40.730045] [ 40.730335] [ 40.730565] Allocated by task 212: [ 40.730988] kasan_save_stack+0x22/0x50 [ 40.731498] kasan_set_track+0x25/0x30 [ 40.731995] __kasan_slab_alloc+0x59/0x70 [ 40.732505] kmem_cache_alloc+0x16b/0x370 [ 40.733015] vm_area_dup+0x20/0x160 [ 40.733472] __split_vma+0x170/0x950 [ 40.733928] split_vma+0xc6/0x110 [ 40.734371] mprotect_fixup+0x8d2/0xb30 [ 40.734871] do_mprotect_pkey+0x87e/0xd40 [ 40.735389] __x64_sys_mprotect+0x78/0xc0 [ 40.735908] do_syscall_64+0x3f/0x90 [ 40.736383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.737021] [ 40.737239] Freed by task 212: [ 40.737622] kasan_save_stack+0x22/0x50 [ 40.738122] kasan_set_track+0x25/0x30 [ 40.738636] kasan_save_free_info+0x2b/0x50 [ 40.739158] __kasan_slab_free+0x10a/0x190 [ 40.739691] kmem_cache_free+0x10d/0x4d0 [ 40.740194] rcu_core+0x8c8/0x2860 [ 40.740633] __do_softirq+0x1b7/0x7d4 [ 40.741111] [ 40.741326] Last potentially related work creation: [ 40.741900] kasan_save_stack+0x22/0x50 [ 40.742413] __kasan_record_aux_stack+0x8e/0xa0 [ 40.742984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.743625] remove_vma+0x139/0x170 [ 40.744070] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.744712] do_vmi_munmap+0x1f1/0x2b0 [ 40.745190] __vm_munmap+0x138/0x3a0 [ 40.745652] __x64_sys_munmap+0x59/0x80 [ 40.746144] do_syscall_64+0x3f/0x90 [ 40.746645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.747278] [ 40.747494] Second to last potentially related work creation: [ 40.748172] kasan_save_stack+0x22/0x50 [ 40.748670] __kasan_record_aux_stack+0x8e/0xa0 [ 40.749237] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.749878] remove_vma+0x139/0x170 [ 40.750327] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.750889] do_vmi_munmap+0x1f1/0x2b0 [ 40.751373] mmap_region+0x1f9/0x2660 [ 40.751841] do_mmap+0x854/0xf00 [ 40.752267] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.752757] ksys_mmap_pgoff+0x3af/0x500 [ 40.753253] do_syscall_64+0x3f/0x90 [ 40.753724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.754373] [ 40.754595] The buggy address belongs to the object at ffff88800d5f9488 [ 40.754595] which belongs to the cache vm_area_struct of size 168 [ 40.756016] The buggy address is located 88 bytes inside of [ 40.756016] freed 168-byte region [ffff88800d5f9488, ffff88800d5f9530) [ 40.757383] [ 40.757599] The buggy address belongs to the physical page: [ 40.758245] page:000000002aecbd80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5f9 [ 40.759330] memcg:ffff88800d7b3b01 [ 40.759751] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.760391] page_type: 0xffffffff() [ 40.760843] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3400 dead000000000004 [ 40.761745] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7b3b01 [ 40.762651] page dumped because: kasan: bad access detected [ 40.763305] [ 40.763525] Memory state around the buggy address: [ 40.764102] ffff88800d5f9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.764938] ffff88800d5f9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.765777] >ffff88800d5f9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.766624] ^ [ 40.767394] ffff88800d5f9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 40.768407] ffff88800d5f9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.769427] ================================================================== [ 40.770640] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 42.456111] BUG: Bad rss-counter state mm:00000000a66003bc type:MM_FILEPAGES val:33 [ 42.456619] BUG: Bad rss-counter state mm:00000000a66003bc type:MM_ANONPAGES val:22 [ 42.973479] BUG: Bad rss-counter state mm:00000000f5ec145d type:MM_FILEPAGES val:33 [ 42.974681] BUG: Bad rss-counter state mm:00000000f5ec145d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1259' (ECDSA) to the list of known hosts. 2023/06/20 09:18:46 fuzzer started 2023/06/20 09:18:47 dialing manager at localhost:44161 2023/06/20 09:18:47 checking machine... 2023/06/20 09:18:47 checking revisions... [ 43.653469] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:18:47 testing simple program... [ 43.703467] cgroup: Unknown subsys name 'net' [ 43.752479] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:18:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801ac23180 RCX=0000000000000000 RDX=ffff888015cd8000 RSI=ffffffff8162a3a8 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff888019eef8f0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000000 R15=ffff888019eef938 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 00007fecfb7d3900 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=00007fffec4c5000 CR3=000000000fdea000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f1e39424048 CR3=000000000d8c0000 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=b91fdf3d1643aba844417a689eb23fe0 XMM02=000000000011e070eff9b2d0a8fce9cb XMM03=000000000011e1402c67c8bc2e329bc3 XMM04=c8db56273cec77e600000000000ae988 XMM05=dfcdbad4f1609c370000000000135690 XMM06=1abd1703044b876d0000000000134868 XMM07=e042d86d42eb936e0000000000124d78 XMM08=7332646273b9a94f000000000011e140 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000