[ 31.192858] BUG: Bad rss-counter state mm:000000002d93ab17 type:MM_FILEPAGES val:33 [ 31.194071] BUG: Bad rss-counter state mm:000000002d93ab17 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.380086] ================================================================== [ 31.381052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.382005] Read of size 8 at addr ffff88800ee436b0 by task sshd/219 [ 31.383026] [ 31.383256] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.384154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.385147] Call Trace: [ 31.385471] [ 31.385757] dump_stack_lvl+0x91/0xf0 [ 31.386253] print_report+0xcc/0x620 [ 31.386749] ? __virt_addr_valid+0x102/0x340 [ 31.387311] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.387963] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.388578] kasan_report+0xbe/0xf0 [ 31.389070] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.389700] vma_interval_tree_remove+0xc75/0xec0 [ 31.390314] vma_prepare+0xc54/0x11a0 [ 31.390801] __split_vma+0x5af/0x950 [ 31.391275] ? __pfx___split_vma+0x10/0x10 [ 31.391814] ? find_held_lock+0x2c/0x110 [ 31.392346] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.392913] ? lock_is_held_type+0x9f/0x120 [ 31.393456] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.394068] ? mtree_range_walk+0x632/0x900 [ 31.394626] ? mas_walk+0x5c7/0x7c0 [ 31.395111] do_vmi_munmap+0x1f1/0x2b0 [ 31.395605] mmap_region+0x1f9/0x2660 [ 31.396106] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.396624] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.397343] ? __pfx_lock_acquire+0x10/0x10 [ 31.397886] ? __pfx_mmap_region+0x10/0x10 [ 31.398433] ? security_mmap_addr+0x7d/0xa0 [ 31.398969] ? get_unmapped_area+0x1f5/0x3f0 [ 31.399523] do_mmap+0x854/0xf00 [ 31.399978] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.400472] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.401045] ksys_mmap_pgoff+0x3af/0x500 [ 31.401548] do_syscall_64+0x3f/0x90 [ 31.402029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.402684] RIP: 0033:0x7f4d49b7dd82 [ 31.403141] 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 [ 31.405364] RSP: 002b:00007ffd67b6ad28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.406305] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d49b7dd82 [ 31.407172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d48fb7000 [ 31.408039] RBP: 00007f4d48fb7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.408886] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb3ddb9ec0 [ 31.409737] R13: 00007ffd67b6ad40 R14: 00007ffd67b6ad70 R15: 00007ffd67b6b0d0 [ 31.410591] [ 31.410889] [ 31.411107] Allocated by task 212: [ 31.411543] kasan_save_stack+0x22/0x50 [ 31.412064] kasan_set_track+0x25/0x30 [ 31.412561] __kasan_slab_alloc+0x59/0x70 [ 31.413089] kmem_cache_alloc+0x16b/0x370 [ 31.413606] vm_area_dup+0x20/0x160 [ 31.414064] __split_vma+0x170/0x950 [ 31.414532] split_vma+0xc6/0x110 [ 31.414981] mprotect_fixup+0x8d2/0xb30 [ 31.415492] do_mprotect_pkey+0x87e/0xd40 [ 31.416026] __x64_sys_mprotect+0x78/0xc0 [ 31.416557] do_syscall_64+0x3f/0x90 [ 31.417037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.417683] [ 31.417903] Freed by task 212: [ 31.418304] kasan_save_stack+0x22/0x50 [ 31.418816] kasan_set_track+0x25/0x30 [ 31.419310] kasan_save_free_info+0x2b/0x50 [ 31.419852] __kasan_slab_free+0x10a/0x190 [ 31.420410] kmem_cache_free+0x10d/0x4d0 [ 31.420928] rcu_core+0x8c8/0x2860 [ 31.421390] __do_softirq+0x1b7/0x7d4 [ 31.421883] [ 31.422105] Last potentially related work creation: [ 31.422700] kasan_save_stack+0x22/0x50 [ 31.423204] __kasan_record_aux_stack+0x8e/0xa0 [ 31.423783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.424511] remove_vma+0x139/0x170 [ 31.424969] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.425530] do_vmi_munmap+0x1f1/0x2b0 [ 31.426020] __vm_munmap+0x138/0x3a0 [ 31.426495] __x64_sys_munmap+0x59/0x80 [ 31.426997] do_syscall_64+0x3f/0x90 [ 31.427483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.428149] [ 31.428367] Second to last potentially related work creation: [ 31.429050] kasan_save_stack+0x22/0x50 [ 31.429557] __kasan_record_aux_stack+0x8e/0xa0 [ 31.430138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.430782] remove_vma+0x139/0x170 [ 31.431231] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.431804] do_vmi_munmap+0x1f1/0x2b0 [ 31.432303] mmap_region+0x1f9/0x2660 [ 31.432779] do_mmap+0x854/0xf00 [ 31.433211] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.433699] ksys_mmap_pgoff+0x3af/0x500 [ 31.434200] do_syscall_64+0x3f/0x90 [ 31.434679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.435318] [ 31.435537] The buggy address belongs to the object at ffff88800ee43658 [ 31.435537] which belongs to the cache vm_area_struct of size 168 [ 31.437010] The buggy address is located 88 bytes inside of [ 31.437010] freed 168-byte region [ffff88800ee43658, ffff88800ee43700) [ 31.438436] [ 31.438654] The buggy address belongs to the physical page: [ 31.439316] page:000000009215c1df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee43 [ 31.440407] memcg:ffff88800df1dc01 [ 31.440844] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.441490] page_type: 0xffffffff() [ 31.441942] raw: 0100000000000200 ffff8880087a0c80 ffffea0000315fc0 dead000000000002 [ 31.442860] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df1dc01 [ 31.443764] page dumped because: kasan: bad access detected [ 31.444431] [ 31.444648] Memory state around the buggy address: [ 31.445217] ffff88800ee43580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.446071] ffff88800ee43600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.446926] >ffff88800ee43680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.447778] ^ [ 31.448408] ffff88800ee43700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.449265] ffff88800ee43780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.450119] ================================================================== [ 31.451141] Disabling lock debugging due to kernel taint [ 33.361532] BUG: Bad rss-counter state mm:00000000eafdb2e9 type:MM_FILEPAGES val:33 [ 33.362446] BUG: Bad rss-counter state mm:00000000eafdb2e9 type:MM_ANONPAGES val:22 [ 33.967745] BUG: Bad rss-counter state mm:00000000c997769b type:MM_FILEPAGES val:33 [ 33.968833] BUG: Bad rss-counter state mm:00000000c997769b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32893' (ECDSA) to the list of known hosts. 2023/06/20 15:48:55 fuzzer started 2023/06/20 15:48:56 dialing manager at localhost:36067 2023/06/20 15:48:56 checking machine... 2023/06/20 15:48:56 checking revisions... [ 34.670251] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:48:56 testing simple program... [ 34.719179] cgroup: Unknown subsys name 'net' [ 34.759173] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:48:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800d9a79b8 RCX=0000000000000001 RDX=1ffff11001b34e8f RSI=ffff88800d9a79a0 RDI=ffff88800d9a7478 RBP=ffff88800d9a0000 RSP=ffff88800d9a73f8 R8 =0000000000000001 R9 =ffff88800d9a74a8 R10=0000000000038001 R11=000000000002c9f1 R12=ffff88800d9a74c8 R13=ffff88800d9a74b0 R14=ffff88800d9a79a0 R15=ffff88800d9a7468 RIP=ffffffff81131ca6 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6804d79900 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=00007f68041b5b60 CR3=000000000c6f4000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9687a8595400ca8200000000000ae988 XMM05=69a30c220e39fb7a00000000001336b0 XMM06=806171799158d9670000000000132130 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=0000562bf6a7e954 CR3=00000000096d0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000