syzkaller login: [ 29.683040] BUG: Bad rss-counter state mm:000000009e3c6168 type:MM_FILEPAGES val:33 [ 29.684858] BUG: Bad rss-counter state mm:000000009e3c6168 type:MM_ANONPAGES val:22 [ 29.849266] ================================================================== [ 29.850355] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.851498] Read of size 8 at addr ffff88801681b5c8 by task sshd/220 [ 29.852597] [ 29.852867] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.853896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.855064] Call Trace: [ 29.855444] [ 29.855785] dump_stack_lvl+0x91/0xf0 [ 29.856400] print_report+0xcc/0x620 [ 29.856929] ? __virt_addr_valid+0x102/0x340 [ 29.857488] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.858112] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.858733] kasan_report+0xbe/0xf0 [ 29.859219] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.859843] vma_interval_tree_remove+0xc75/0xec0 [ 29.860481] vma_prepare+0xc54/0x11a0 [ 29.860974] __split_vma+0x5af/0x950 [ 29.861463] ? __pfx___split_vma+0x10/0x10 [ 29.861999] ? find_held_lock+0x2c/0x110 [ 29.862522] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.863108] ? lock_is_held_type+0x9f/0x120 [ 29.863659] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.864299] ? mtree_range_walk+0x632/0x900 [ 29.864864] ? mas_walk+0x5c7/0x7c0 [ 29.865341] do_vmi_munmap+0x1f1/0x2b0 [ 29.865845] mmap_region+0x1f9/0x2660 [ 29.866327] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.866852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.867575] ? __pfx_lock_acquire+0x10/0x10 [ 29.868111] ? __pfx_mmap_region+0x10/0x10 [ 29.868686] ? security_mmap_addr+0x7d/0xa0 [ 29.869221] ? get_unmapped_area+0x1f5/0x3f0 [ 29.869781] do_mmap+0x854/0xf00 [ 29.870223] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.870732] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.871293] ksys_mmap_pgoff+0x3af/0x500 [ 29.871799] do_syscall_64+0x3f/0x90 [ 29.872305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.872959] RIP: 0033:0x7f6112161d82 [ 29.873417] 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 [ 29.875602] RSP: 002b:00007ffc6ef2f9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.876511] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6112161d82 [ 29.877393] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f611159b000 [ 29.878242] RBP: 00007f611159b000 R08: 0000000000000009 R09: 0000000000001000 [ 29.879078] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a0d32cf60 [ 29.879919] R13: 00007ffc6ef2f9f0 R14: 00007ffc6ef2fa20 R15: 00007ffc6ef2fd80 [ 29.880784] [ 29.881075] [ 29.881287] Allocated by task 213: [ 29.881711] kasan_save_stack+0x22/0x50 [ 29.882211] kasan_set_track+0x25/0x30 [ 29.882701] __kasan_slab_alloc+0x59/0x70 [ 29.883232] kmem_cache_alloc+0x16b/0x370 [ 29.883746] vm_area_dup+0x20/0x160 [ 29.884206] __split_vma+0x170/0x950 [ 29.884672] split_vma+0xc6/0x110 [ 29.885105] mprotect_fixup+0x8d2/0xb30 [ 29.885606] do_mprotect_pkey+0x87e/0xd40 [ 29.886130] __x64_sys_mprotect+0x78/0xc0 [ 29.886653] do_syscall_64+0x3f/0x90 [ 29.887134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.887783] [ 29.887996] Freed by task 203: [ 29.888394] kasan_save_stack+0x22/0x50 [ 29.888894] kasan_set_track+0x25/0x30 [ 29.889385] kasan_save_free_info+0x2b/0x50 [ 29.889913] __kasan_slab_free+0x10a/0x190 [ 29.890439] kmem_cache_free+0x10d/0x4d0 [ 29.890950] rcu_core+0x8c8/0x2860 [ 29.891393] __do_softirq+0x1b7/0x7d4 [ 29.891876] [ 29.892093] Last potentially related work creation: [ 29.892687] kasan_save_stack+0x22/0x50 [ 29.893183] __kasan_record_aux_stack+0x8e/0xa0 [ 29.893835] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.894481] remove_vma+0x139/0x170 [ 29.894925] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.895483] do_vmi_munmap+0x1f1/0x2b0 [ 29.895972] __vm_munmap+0x138/0x3a0 [ 29.896454] __x64_sys_munmap+0x59/0x80 [ 29.896947] do_syscall_64+0x3f/0x90 [ 29.897422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.898059] [ 29.898269] The buggy address belongs to the object at ffff88801681b570 [ 29.898269] which belongs to the cache vm_area_struct of size 168 [ 29.899738] The buggy address is located 88 bytes inside of [ 29.899738] freed 168-byte region [ffff88801681b570, ffff88801681b618) [ 29.901167] [ 29.901379] The buggy address belongs to the physical page: [ 29.902032] page:00000000839338b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1681b [ 29.903121] memcg:ffff88800dcc4401 [ 29.903537] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.904180] page_type: 0xffffffff() [ 29.904630] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.905537] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcc4401 [ 29.906427] page dumped because: kasan: bad access detected [ 29.907079] [ 29.907294] Memory state around the buggy address: [ 29.907863] ffff88801681b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.908714] ffff88801681b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.909555] >ffff88801681b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.910390] ^ [ 29.911047] ffff88801681b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.911892] ffff88801681b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.912752] ================================================================== [ 29.913751] Disabling lock debugging due to kernel taint [ 32.661234] BUG: Bad rss-counter state mm:00000000da336f00 type:MM_FILEPAGES val:33 [ 32.662282] BUG: Bad rss-counter state mm:00000000da336f00 type:MM_ANONPAGES val:22 [ 33.066022] BUG: Bad rss-counter state mm:00000000aa176ae5 type:MM_FILEPAGES val:33 [ 33.067163] BUG: Bad rss-counter state mm:00000000aa176ae5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59709' (ECDSA) to the list of known hosts. 2023/06/20 20:59:17 fuzzer started 2023/06/20 20:59:18 dialing manager at localhost:36067 2023/06/20 20:59:18 checking machine... 2023/06/20 20:59:18 checking revisions... [ 33.723944] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:59:18 testing simple program... [ 33.759661] cgroup: Unknown subsys name 'net' [ 33.803864] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:59:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff888018327d68 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000038c51 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801656b680 R15=ffff88801a372450 RIP=ffffffff8113038e 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 00007f5a2ca55900 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=00007f5a2d00d0b0 CR3=0000000015858000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f5e5f69ce60 CR3=0000000013a5e000 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=503da5bb906e878bbd4621a612c9ae5b XMM02=ec2efd57dc4c00df000000000011ae38 XMM03=855c4424e2e2fa2a000000000011af08 XMM04=4bd554e08103c26700000000000ae988 XMM05=e4cb8bb95a7664b60000000000132118 XMM06=adf96c9f3d770a9b0000000000130f80 XMM07=e042d86d42eb936e00000000001222f8 XMM08=855c4424e2e2fa2a000000000011af08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000