[ 47.628762] BUG: Bad rss-counter state mm:00000000a94977a4 type:MM_FILEPAGES val:33 [ 47.630462] BUG: Bad rss-counter state mm:00000000a94977a4 type:MM_ANONPAGES val:22 [ 47.821920] ================================================================== [ 47.822966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.824024] Read of size 8 at addr ffff888016cae6b0 by task sshd/225 [ 47.825089] [ 47.825390] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.826652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.827799] Call Trace: [ 47.828161] [ 47.828493] dump_stack_lvl+0x91/0xf0 [ 47.829039] print_report+0xcc/0x620 [ 47.829619] ? __virt_addr_valid+0x102/0x340 [ 47.830247] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.830938] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.831632] kasan_report+0xbe/0xf0 [ 47.832161] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.832870] vma_interval_tree_remove+0xc75/0xec0 [ 47.833571] vma_prepare+0xc54/0x11a0 [ 47.834114] __split_vma+0x5af/0x950 [ 47.834661] ? __pfx___split_vma+0x10/0x10 [ 47.835264] ? find_held_lock+0x2c/0x110 [ 47.835851] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.836519] ? lock_is_held_type+0x9f/0x120 [ 47.837110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.837793] ? mtree_range_walk+0x632/0x900 [ 47.838386] ? mas_walk+0x5c7/0x7c0 [ 47.838887] do_vmi_munmap+0x1f1/0x2b0 [ 47.839445] mmap_region+0x1f9/0x2660 [ 47.839978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.840540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.841307] ? __pfx_lock_acquire+0x10/0x10 [ 47.841882] ? __pfx_mmap_region+0x10/0x10 [ 47.842464] ? security_mmap_addr+0x7d/0xa0 [ 47.843028] ? get_unmapped_area+0x1f5/0x3f0 [ 47.843625] do_mmap+0x854/0xf00 [ 47.844091] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.844642] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.845266] ksys_mmap_pgoff+0x3af/0x500 [ 47.845834] do_syscall_64+0x3f/0x90 [ 47.846350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.847040] RIP: 0033:0x7fe5a8a70d82 [ 47.847545] 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 [ 47.849867] RSP: 002b:00007ffc88ed6e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.850845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5a8a70d82 [ 47.851777] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5a7eaa000 [ 47.852692] RBP: 00007fe5a7eaa000 R08: 0000000000000009 R09: 0000000000001000 [ 47.853623] R10: 0000000000000812 R11: 0000000000000206 R12: 000055945d617f70 [ 47.854554] R13: 00007ffc88ed6e60 R14: 00007ffc88ed6e90 R15: 00007ffc88ed71f0 [ 47.855481] [ 47.855792] [ 47.856021] Allocated by task 218: [ 47.856486] kasan_save_stack+0x22/0x50 [ 47.857037] kasan_set_track+0x25/0x30 [ 47.857606] __kasan_slab_alloc+0x59/0x70 [ 47.858174] kmem_cache_alloc+0x16b/0x370 [ 47.858762] vm_area_dup+0x20/0x160 [ 47.859262] __split_vma+0x170/0x950 [ 47.859771] split_vma+0xc6/0x110 [ 47.860259] mprotect_fixup+0x8d2/0xb30 [ 47.860793] do_mprotect_pkey+0x87e/0xd40 [ 47.861360] __x64_sys_mprotect+0x78/0xc0 [ 47.861934] do_syscall_64+0x3f/0x90 [ 47.862452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.863183] [ 47.863432] Freed by task 218: [ 47.863856] kasan_save_stack+0x22/0x50 [ 47.864414] kasan_set_track+0x25/0x30 [ 47.864950] kasan_save_free_info+0x2b/0x50 [ 47.865643] __kasan_slab_free+0x10a/0x190 [ 47.866226] kmem_cache_free+0x10d/0x4d0 [ 47.866788] rcu_core+0x8c8/0x2860 [ 47.867308] __do_softirq+0x1b7/0x7d4 [ 47.867842] [ 47.868082] Last potentially related work creation: [ 47.868748] kasan_save_stack+0x22/0x50 [ 47.869331] __kasan_record_aux_stack+0x8e/0xa0 [ 47.869959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.870654] remove_vma+0x139/0x170 [ 47.871134] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.871761] do_vmi_munmap+0x1f1/0x2b0 [ 47.872294] __vm_munmap+0x138/0x3a0 [ 47.872788] __x64_sys_munmap+0x59/0x80 [ 47.873327] do_syscall_64+0x3f/0x90 [ 47.873844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.874540] [ 47.874768] The buggy address belongs to the object at ffff888016cae658 [ 47.874768] which belongs to the cache vm_area_struct of size 168 [ 47.876346] The buggy address is located 88 bytes inside of [ 47.876346] freed 168-byte region [ffff888016cae658, ffff888016cae700) [ 47.877867] [ 47.878095] The buggy address belongs to the physical page: [ 47.878800] page:000000003997d036 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cae [ 47.879984] memcg:ffff88800dbef501 [ 47.880453] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.881262] page_type: 0xffffffff() [ 47.881914] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.883221] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbef501 [ 47.884497] page dumped because: kasan: bad access detected [ 47.885429] [ 47.885767] Memory state around the buggy address: [ 47.886583] ffff888016cae580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.887590] ffff888016cae600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 47.888525] >ffff888016cae680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.889432] ^ [ 47.890068] ffff888016cae700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 47.890983] ffff888016cae780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 47.891902] ================================================================== [ 47.892944] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 49.903214] BUG: Bad rss-counter state mm:000000006ee9f6cc type:MM_FILEPAGES val:33 [ 49.904240] BUG: Bad rss-counter state mm:000000006ee9f6cc type:MM_ANONPAGES val:22 [ 50.419527] BUG: Bad rss-counter state mm:0000000075a2f8da type:MM_FILEPAGES val:33 [ 50.420508] BUG: Bad rss-counter state mm:0000000075a2f8da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34941' (ECDSA) to the list of known hosts. 2023/06/19 14:26:43 fuzzer started 2023/06/19 14:26:43 dialing manager at localhost:44161 2023/06/19 14:26:43 checking machine... 2023/06/19 14:26:43 checking revisions... [ 51.075054] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:26:43 testing simple program... [ 51.137814] cgroup: Unknown subsys name 'net' [ 51.205037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:26:26 Registers: info registers vcpu 0 RAX=000055722604e8d8 RBX=000055722604e8c0 RCX=0000000000000001 RDX=000055722604ee00 RSI=000055722604ee30 RDI=0000000000000000 RBP=00007fb8c265ec90 RSP=00007fb8c265eb40 R8 =00007fb8c265f700 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000286 R12=0000000000000000 R13=000055722604ee00 R14=000055722604ec80 R15=0000000000802000 RIP=000055722464bac2 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb8c265f700 00000000 00000000 GS =0000 0000000000000000 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=00007f3b51ef1c60 CR3=000000000d8a8000 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=2032343a36323a3431203931206e754a XMM01=5f687373203a726f727265203a5d3234 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a36323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8171102c RDX=1ffffd40000c5d88 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff888015917d90 RSP=ffff888015917bf8 R8 =0000000000000000 R9 =fffff940000c5d88 R10=ffffea000062ec47 R11=0000000000000000 R12=ffffea000062ec40 R13=ffff88800d69f0e8 R14=ffff888015917db8 R15=ffffea000062ec74 RIP=ffffffff814c0328 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa61d7d5900 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=00007fa61df473ec CR3=000000000db92000 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=6720646572637465733a4d41503d706f 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