syzkaller login: [ 38.663244] BUG: Bad rss-counter state mm:000000003ea0e089 type:MM_FILEPAGES val:33 [ 38.664472] BUG: Bad rss-counter state mm:000000003ea0e089 type:MM_ANONPAGES val:22 [ 38.813651] ================================================================== [ 38.814578] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.815504] Read of size 8 at addr ffff888009735968 by task sshd/227 [ 38.816438] [ 38.816654] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.817512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.818503] Call Trace: [ 38.818827] [ 38.819106] dump_stack_lvl+0x91/0xf0 [ 38.819605] print_report+0xcc/0x620 [ 38.820106] ? __virt_addr_valid+0x102/0x340 [ 38.820653] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.821259] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.821864] kasan_report+0xbe/0xf0 [ 38.822339] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.822954] vma_interval_tree_remove+0xc75/0xec0 [ 38.823556] vma_prepare+0xc54/0x11a0 [ 38.824033] __split_vma+0x5af/0x950 [ 38.824519] ? __pfx___split_vma+0x10/0x10 [ 38.825041] ? find_held_lock+0x2c/0x110 [ 38.825560] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.826120] ? lock_is_held_type+0x9f/0x120 [ 38.826653] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.827254] ? mtree_range_walk+0x632/0x900 [ 38.827801] ? mas_walk+0x5c7/0x7c0 [ 38.828284] do_vmi_munmap+0x1f1/0x2b0 [ 38.828769] mmap_region+0x1f9/0x2660 [ 38.829251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.829770] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.830485] ? __pfx_lock_acquire+0x10/0x10 [ 38.831012] ? __pfx_mmap_region+0x10/0x10 [ 38.831540] ? security_mmap_addr+0x7d/0xa0 [ 38.832066] ? get_unmapped_area+0x1f5/0x3f0 [ 38.832643] do_mmap+0x854/0xf00 [ 38.833075] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.833563] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.834118] ksys_mmap_pgoff+0x3af/0x500 [ 38.834620] do_syscall_64+0x3f/0x90 [ 38.835093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.835735] RIP: 0033:0x7ffabea3dd82 [ 38.836195] 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 [ 38.838288] RSP: 002b:00007ffc7e46baf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.839199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffabea3dd82 [ 38.840054] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffabde77000 [ 38.840911] RBP: 00007ffabde77000 R08: 0000000000000009 R09: 0000000000001000 [ 38.841761] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622849f4b20 [ 38.842607] R13: 00007ffc7e46bb10 R14: 00007ffc7e46bb40 R15: 00007ffc7e46bea0 [ 38.843493] [ 38.843785] [ 38.843995] Allocated by task 220: [ 38.844442] kasan_save_stack+0x22/0x50 [ 38.844943] kasan_set_track+0x25/0x30 [ 38.845442] __kasan_slab_alloc+0x59/0x70 [ 38.845965] kmem_cache_alloc+0x16b/0x370 [ 38.846483] vm_area_dup+0x20/0x160 [ 38.846943] __split_vma+0x170/0x950 [ 38.847406] split_vma+0xc6/0x110 [ 38.847839] mprotect_fixup+0x8d2/0xb30 [ 38.848355] do_mprotect_pkey+0x87e/0xd40 [ 38.848871] __x64_sys_mprotect+0x78/0xc0 [ 38.849387] do_syscall_64+0x3f/0x90 [ 38.849857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.850499] [ 38.850717] Freed by task 220: [ 38.851109] kasan_save_stack+0x22/0x50 [ 38.851611] kasan_set_track+0x25/0x30 [ 38.852114] kasan_save_free_info+0x2b/0x50 [ 38.852643] __kasan_slab_free+0x10a/0x190 [ 38.853174] kmem_cache_free+0x10d/0x4d0 [ 38.853675] rcu_core+0x8c8/0x2860 [ 38.854115] __do_softirq+0x1b7/0x7d4 [ 38.854586] [ 38.854799] Last potentially related work creation: [ 38.855380] kasan_save_stack+0x22/0x50 [ 38.855880] __kasan_record_aux_stack+0x8e/0xa0 [ 38.856460] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.857110] remove_vma+0x139/0x170 [ 38.857563] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.858110] do_vmi_munmap+0x1f1/0x2b0 [ 38.858587] __vm_munmap+0x138/0x3a0 [ 38.859055] __x64_sys_munmap+0x59/0x80 [ 38.859547] do_syscall_64+0x3f/0x90 [ 38.860016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.860675] [ 38.860887] The buggy address belongs to the object at ffff888009735910 [ 38.860887] which belongs to the cache vm_area_struct of size 168 [ 38.862333] The buggy address is located 88 bytes inside of [ 38.862333] freed 168-byte region [ffff888009735910, ffff8880097359b8) [ 38.863724] [ 38.863940] The buggy address belongs to the physical page: [ 38.864602] page:00000000372de143 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9735 [ 38.865680] memcg:ffff8880181d7901 [ 38.866100] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.866740] page_type: 0xffffffff() [ 38.867189] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.868108] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880181d7901 [ 38.869004] page dumped because: kasan: bad access detected [ 38.869659] [ 38.869871] Memory state around the buggy address: [ 38.870452] ffff888009735800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.871306] ffff888009735880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.872173] >ffff888009735900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.873014] ^ [ 38.873784] ffff888009735980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.874630] ffff888009735a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.875465] ================================================================== [ 38.876421] Disabling lock debugging due to kernel taint [ 40.834959] BUG: Bad rss-counter state mm:000000000cf6aa12 type:MM_FILEPAGES val:33 [ 40.835730] BUG: Bad rss-counter state mm:000000000cf6aa12 type:MM_ANONPAGES val:22 [ 41.332018] BUG: Bad rss-counter state mm:000000003d10f21b type:MM_FILEPAGES val:33 [ 41.333259] BUG: Bad rss-counter state mm:000000003d10f21b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5819' (ECDSA) to the list of known hosts. 2023/06/20 14:10:46 fuzzer started 2023/06/20 14:10:46 dialing manager at localhost:36067 2023/06/20 14:10:46 checking machine... 2023/06/20 14:10:46 checking revisions... [ 41.968401] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:10:47 testing simple program... [ 42.007253] cgroup: Unknown subsys name 'net' [ 42.066758] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:10:46 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88801b0182b0 RCX=ffffffff81f18cb2 RDX=ffff888016ef3680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801b0182e8 RSP=ffff888018387ca8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff888016fe1688 R13=0000000000000001 R14=0000000000000001 R15=ffff88801b0182b0 RIP=ffffffff814c086b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2d1e4ef900 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=00007ffffbcbc000 CR3=000000000e74c000 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=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=00007fced0413e80 CR3=00000000180fc000 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=2036343a30313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3833 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3833325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a30313a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000