syzkaller login: [ 30.795762] BUG: Bad rss-counter state mm:00000000c4ae9bcc type:MM_FILEPAGES val:33 [ 30.796992] BUG: Bad rss-counter state mm:00000000c4ae9bcc type:MM_ANONPAGES val:22 [ 30.860905] ================================================================== [ 30.861858] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.862833] Read of size 8 at addr ffff88801029e3f8 by task sshd/221 [ 30.863659] [ 30.863992] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.864935] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.865965] Call Trace: [ 30.866333] [ 30.866636] dump_stack_lvl+0x91/0xf0 [ 30.867157] print_report+0xcc/0x620 [ 30.867697] ? __virt_addr_valid+0x102/0x340 [ 30.868285] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.868937] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.869587] kasan_report+0xbe/0xf0 [ 30.870093] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870745] vma_interval_tree_remove+0xc75/0xec0 [ 30.871383] vma_prepare+0xc54/0x11a0 [ 30.871906] __split_vma+0x5af/0x950 [ 30.872410] ? __pfx___split_vma+0x10/0x10 [ 30.872967] ? find_held_lock+0x2c/0x110 [ 30.873522] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.874123] ? lock_is_held_type+0x9f/0x120 [ 30.874686] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.875323] ? mtree_range_walk+0x632/0x900 [ 30.875922] ? mas_walk+0x5c7/0x7c0 [ 30.876426] do_vmi_munmap+0x1f1/0x2b0 [ 30.876939] mmap_region+0x1f9/0x2660 [ 30.877445] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.877986] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.878735] ? __pfx_lock_acquire+0x10/0x10 [ 30.879294] ? __pfx_mmap_region+0x10/0x10 [ 30.879876] ? security_mmap_addr+0x7d/0xa0 [ 30.880431] ? get_unmapped_area+0x1f5/0x3f0 [ 30.881013] do_mmap+0x854/0xf00 [ 30.881473] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.881995] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.882585] ksys_mmap_pgoff+0x3af/0x500 [ 30.883114] do_syscall_64+0x3f/0x90 [ 30.883632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884318] RIP: 0033:0x7f6259581d82 [ 30.884800] 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 [ 30.887035] RSP: 002b:00007ffe5cf1dac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.888002] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6259581d82 [ 30.888894] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62589bb000 [ 30.889785] RBP: 00007f62589bb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.890675] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588995e8ec0 [ 30.891575] R13: 00007ffe5cf1dae0 R14: 00007ffe5cf1db10 R15: 00007ffe5cf1de70 [ 30.892476] [ 30.892781] [ 30.893009] Allocated by task 214: [ 30.893458] kasan_save_stack+0x22/0x50 [ 30.893987] kasan_set_track+0x25/0x30 [ 30.894503] __kasan_slab_alloc+0x59/0x70 [ 30.895058] kmem_cache_alloc+0x16b/0x370 [ 30.895631] vm_area_dup+0x20/0x160 [ 30.896116] __split_vma+0x170/0x950 [ 30.896611] split_vma+0xc6/0x110 [ 30.897079] mprotect_fixup+0x8d2/0xb30 [ 30.897614] do_mprotect_pkey+0x87e/0xd40 [ 30.898166] __x64_sys_mprotect+0x78/0xc0 [ 30.898713] do_syscall_64+0x3f/0x90 [ 30.899216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.899906] [ 30.900134] Freed by task 214: [ 30.900550] kasan_save_stack+0x22/0x50 [ 30.901075] kasan_set_track+0x25/0x30 [ 30.901604] kasan_save_free_info+0x2b/0x50 [ 30.902168] __kasan_slab_free+0x10a/0x190 [ 30.902739] kmem_cache_free+0x10d/0x4d0 [ 30.903278] rcu_core+0x8c8/0x2860 [ 30.903764] __do_softirq+0x1b7/0x7d4 [ 30.904279] [ 30.904508] Last potentially related work creation: [ 30.905125] kasan_save_stack+0x22/0x50 [ 30.905665] __kasan_record_aux_stack+0x8e/0xa0 [ 30.906281] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.906961] remove_vma+0x139/0x170 [ 30.907439] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.908051] do_vmi_munmap+0x1f1/0x2b0 [ 30.908575] __vm_munmap+0x138/0x3a0 [ 30.909074] __x64_sys_munmap+0x59/0x80 [ 30.909610] do_syscall_64+0x3f/0x90 [ 30.910122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910797] [ 30.911023] The buggy address belongs to the object at ffff88801029e3a0 [ 30.911023] which belongs to the cache vm_area_struct of size 168 [ 30.912579] The buggy address is located 88 bytes inside of [ 30.912579] freed 168-byte region [ffff88801029e3a0, ffff88801029e448) [ 30.914060] [ 30.914286] The buggy address belongs to the physical page: [ 30.914989] page:000000000d00c5a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029e [ 30.916137] memcg:ffff888010295a01 [ 30.916586] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.917271] page_type: 0xffffffff() [ 30.917745] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.918703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010295a01 [ 30.919660] page dumped because: kasan: bad access detected [ 30.920354] [ 30.920580] Memory state around the buggy address: [ 30.921196] ffff88801029e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.922093] ffff88801029e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.922988] >ffff88801029e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.923913] ^ [ 30.924795] ffff88801029e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.925690] ffff88801029e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.926584] ================================================================== [ 30.927603] Disabling lock debugging due to kernel taint [ 33.680475] BUG: Bad rss-counter state mm:000000001b86945b type:MM_FILEPAGES val:33 [ 33.681466] BUG: Bad rss-counter state mm:000000001b86945b type:MM_ANONPAGES val:22 [ 34.202680] BUG: Bad rss-counter state mm:00000000308e71fa type:MM_FILEPAGES val:33 [ 34.203836] BUG: Bad rss-counter state mm:00000000308e71fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56688' (ECDSA) to the list of known hosts. 2023/06/21 02:15:21 fuzzer started 2023/06/21 02:15:21 dialing manager at localhost:36067 2023/06/21 02:15:21 checking machine... 2023/06/21 02:15:21 checking revisions... [ 34.910975] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:15:22 testing simple program... [ 34.961717] cgroup: Unknown subsys name 'net' [ 35.026238] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:15:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd61905ff8 CR3=000000000e948000 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=2031323a35313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a35313a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff8605534c RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864bbb4e RDI=ffffffff86055348 RBP=ffffffff8605534c RSP=ffff8880164ef7d0 R8 =ffffffff864bbb4e R9 =ffff8880164ef8c8 R10=0000000000038001 R11=00000000000b6a61 R12=ffffffff8605534c R13=ffffffff86055348 R14=ffffffff86055348 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 00007f9b04266900 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=00007ffe1d612000 CR3=000000000f306000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000