[ 31.309637] BUG: Bad rss-counter state mm:00000000f4e73783 type:MM_FILEPAGES val:33 [ 31.310917] BUG: Bad rss-counter state mm:00000000f4e73783 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.368464] ================================================================== [ 31.369380] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.370327] Read of size 8 at addr ffff88800d7d3a50 by task sshd/219 [ 31.371281] [ 31.371555] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.372456] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.373450] Call Trace: [ 31.373778] [ 31.374063] dump_stack_lvl+0x91/0xf0 [ 31.374570] print_report+0xcc/0x620 [ 31.375054] ? __virt_addr_valid+0x102/0x340 [ 31.375626] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.376251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.376860] kasan_report+0xbe/0xf0 [ 31.377337] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377975] vma_interval_tree_remove+0xc75/0xec0 [ 31.378586] vma_prepare+0xc54/0x11a0 [ 31.379068] __split_vma+0x5af/0x950 [ 31.379572] ? __pfx___split_vma+0x10/0x10 [ 31.380099] ? find_held_lock+0x2c/0x110 [ 31.380617] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.381194] ? lock_is_held_type+0x9f/0x120 [ 31.381732] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.382348] ? mtree_range_walk+0x632/0x900 [ 31.382909] ? mas_walk+0x5c7/0x7c0 [ 31.383398] do_vmi_munmap+0x1f1/0x2b0 [ 31.383900] mmap_region+0x1f9/0x2660 [ 31.384385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.384903] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.385619] ? __pfx_lock_acquire+0x10/0x10 [ 31.386152] ? __pfx_mmap_region+0x10/0x10 [ 31.386689] ? security_mmap_addr+0x7d/0xa0 [ 31.387220] ? get_unmapped_area+0x1f5/0x3f0 [ 31.387787] do_mmap+0x854/0xf00 [ 31.388228] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.388725] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.389295] ksys_mmap_pgoff+0x3af/0x500 [ 31.389816] do_syscall_64+0x3f/0x90 [ 31.390300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.390958] RIP: 0033:0x7f4894f57d82 [ 31.391434] 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 [ 31.393594] RSP: 002b:00007ffd99753508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.394503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4894f57d82 [ 31.395368] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4894391000 [ 31.396218] RBP: 00007f4894391000 R08: 0000000000000009 R09: 0000000000001000 [ 31.397074] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f737600ec0 [ 31.397929] R13: 00007ffd99753520 R14: 00007ffd99753550 R15: 00007ffd997538b0 [ 31.398794] [ 31.399087] [ 31.399320] Allocated by task 212: [ 31.399760] kasan_save_stack+0x22/0x50 [ 31.400269] kasan_set_track+0x25/0x30 [ 31.400765] __kasan_slab_alloc+0x59/0x70 [ 31.401288] kmem_cache_alloc+0x16b/0x370 [ 31.401809] vm_area_dup+0x20/0x160 [ 31.402277] __split_vma+0x170/0x950 [ 31.402748] split_vma+0xc6/0x110 [ 31.403190] mprotect_fixup+0x8d2/0xb30 [ 31.403710] do_mprotect_pkey+0x87e/0xd40 [ 31.404245] __x64_sys_mprotect+0x78/0xc0 [ 31.404776] do_syscall_64+0x3f/0x90 [ 31.405267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.405929] [ 31.406144] Freed by task 19: [ 31.406532] kasan_save_stack+0x22/0x50 [ 31.407044] kasan_set_track+0x25/0x30 [ 31.407563] kasan_save_free_info+0x2b/0x50 [ 31.408111] __kasan_slab_free+0x10a/0x190 [ 31.408649] kmem_cache_free+0x10d/0x4d0 [ 31.409164] rcu_core+0x8c8/0x2860 [ 31.409621] __do_softirq+0x1b7/0x7d4 [ 31.410104] [ 31.410325] Last potentially related work creation: [ 31.410934] kasan_save_stack+0x22/0x50 [ 31.411471] __kasan_record_aux_stack+0x8e/0xa0 [ 31.412049] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.412697] remove_vma+0x139/0x170 [ 31.413148] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.413709] do_vmi_munmap+0x1f1/0x2b0 [ 31.414199] __vm_munmap+0x138/0x3a0 [ 31.414679] __x64_sys_munmap+0x59/0x80 [ 31.415177] do_syscall_64+0x3f/0x90 [ 31.415676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.416331] [ 31.416552] The buggy address belongs to the object at ffff88800d7d39f8 [ 31.416552] which belongs to the cache vm_area_struct of size 168 [ 31.418054] The buggy address is located 88 bytes inside of [ 31.418054] freed 168-byte region [ffff88800d7d39f8, ffff88800d7d3aa0) [ 31.419541] [ 31.419762] The buggy address belongs to the physical page: [ 31.420434] page:000000004bf1ed0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7d3 [ 31.421545] memcg:ffff88800d686701 [ 31.421983] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.422641] page_type: 0xffffffff() [ 31.423098] raw: 0100000000000200 ffff8880087a0c80 ffffea000040e900 dead000000000002 [ 31.424067] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d686701 [ 31.425004] page dumped because: kasan: bad access detected [ 31.425672] [ 31.425893] Memory state around the buggy address: [ 31.426483] ffff88800d7d3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.427374] ffff88800d7d3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.428242] >ffff88800d7d3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.429099] ^ [ 31.429816] ffff88800d7d3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.430684] ffff88800d7d3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.431569] ================================================================== [ 31.432739] Disabling lock debugging due to kernel taint [ 34.075387] BUG: Bad rss-counter state mm:000000000c5ac393 type:MM_FILEPAGES val:33 [ 34.076575] BUG: Bad rss-counter state mm:000000000c5ac393 type:MM_ANONPAGES val:22 [ 34.401957] BUG: Bad rss-counter state mm:00000000b18d9dec type:MM_FILEPAGES val:33 [ 34.402716] BUG: Bad rss-counter state mm:00000000b18d9dec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6320' (ECDSA) to the list of known hosts. 2023/06/20 20:42:29 fuzzer started 2023/06/20 20:42:29 dialing manager at localhost:36067 2023/06/20 20:42:29 checking machine... 2023/06/20 20:42:29 checking revisions... [ 35.170402] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:42:29 testing simple program... [ 35.224497] cgroup: Unknown subsys name 'net' [ 35.278921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:42:28 Registers: info registers vcpu 0 RAX=000000000000000e RBX=000000000000000f RCX=dffffc0000000000 RDX=dffffc0000000000 RSI=ffffffff844a5108 RDI=ffffffff84e3a5a1 RBP=ffff888009f82608 RSP=ffff888010187ce8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=ffff888009f82678 R13=000000000000000e R14=00007fec70263000 R15=00007fec702b9fff RIP=ffffffff844a515e RFL=00000206 [-----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 00007fec70285900 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=00007fec70264020 CR3=000000000ebf0000 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=0000000000000001 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=00007f6ef8dc47a0 CR3=000000000f202000 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=31d406c2e657cab2f947d1426327019e XMM02=000000000011ec98ec2efd57dc4c00df XMM03=00000000001219904f921befce584b79 XMM04=01e53a23f78ce94f00000000000ae988 XMM05=dfcdbad4f1609c3700000000001314a0 XMM06=819efcdbe9a53a650000000000130678 XMM07=e042d86d42eb936e0000000000121c10 XMM08=4f921befce584b79000000000011ecf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000