syzkaller login: [ 30.631163] BUG: Bad rss-counter state mm:00000000bbfd21dc type:MM_FILEPAGES val:33 [ 30.632598] BUG: Bad rss-counter state mm:00000000bbfd21dc type:MM_ANONPAGES val:22 [ 30.790835] ================================================================== [ 30.791751] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.792699] Read of size 8 at addr ffff88800df4aed8 by task sshd/219 [ 30.793595] [ 30.793812] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.794690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.795685] Call Trace: [ 30.796009] [ 30.796298] dump_stack_lvl+0x91/0xf0 [ 30.796805] print_report+0xcc/0x620 [ 30.797319] ? __virt_addr_valid+0x102/0x340 [ 30.797877] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.798495] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.799110] kasan_report+0xbe/0xf0 [ 30.799595] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.800217] vma_interval_tree_remove+0xc75/0xec0 [ 30.800815] vma_prepare+0xc54/0x11a0 [ 30.801312] __split_vma+0x5af/0x950 [ 30.801787] ? __pfx___split_vma+0x10/0x10 [ 30.802325] ? find_held_lock+0x2c/0x110 [ 30.802849] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.803419] ? lock_is_held_type+0x9f/0x120 [ 30.803957] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.804572] ? mtree_range_walk+0x632/0x900 [ 30.805136] ? mas_walk+0x5c7/0x7c0 [ 30.805614] do_vmi_munmap+0x1f1/0x2b0 [ 30.806103] mmap_region+0x1f9/0x2660 [ 30.806584] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.807094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.807810] ? __pfx_lock_acquire+0x10/0x10 [ 30.808344] ? __pfx_mmap_region+0x10/0x10 [ 30.808870] ? security_mmap_addr+0x7d/0xa0 [ 30.809425] ? get_unmapped_area+0x1f5/0x3f0 [ 30.809972] do_mmap+0x854/0xf00 [ 30.810411] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.810903] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.811466] ksys_mmap_pgoff+0x3af/0x500 [ 30.811974] do_syscall_64+0x3f/0x90 [ 30.812452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813100] RIP: 0033:0x7f337e774d82 [ 30.813562] 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 [ 30.815723] RSP: 002b:00007fffb5618e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.816644] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f337e774d82 [ 30.817543] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f337dbae000 [ 30.818409] RBP: 00007f337dbae000 R08: 0000000000000009 R09: 0000000000001000 [ 30.819275] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b61bb7db20 [ 30.820132] R13: 00007fffb5618e60 R14: 00007fffb5618e90 R15: 00007fffb56191f0 [ 30.821019] [ 30.821331] [ 30.821554] Allocated by task 212: [ 30.821996] kasan_save_stack+0x22/0x50 [ 30.822512] kasan_set_track+0x25/0x30 [ 30.823005] __kasan_slab_alloc+0x59/0x70 [ 30.823528] kmem_cache_alloc+0x16b/0x370 [ 30.824043] vm_area_dup+0x20/0x160 [ 30.824506] __split_vma+0x170/0x950 [ 30.824982] split_vma+0xc6/0x110 [ 30.825448] mprotect_fixup+0x8d2/0xb30 [ 30.825956] do_mprotect_pkey+0x87e/0xd40 [ 30.826477] __x64_sys_mprotect+0x78/0xc0 [ 30.827004] do_syscall_64+0x3f/0x90 [ 30.827487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.828128] [ 30.828342] Freed by task 212: [ 30.828736] kasan_save_stack+0x22/0x50 [ 30.829250] kasan_set_track+0x25/0x30 [ 30.829742] kasan_save_free_info+0x2b/0x50 [ 30.830271] __kasan_slab_free+0x10a/0x190 [ 30.830806] kmem_cache_free+0x10d/0x4d0 [ 30.831334] rcu_core+0x8c8/0x2860 [ 30.831776] __do_softirq+0x1b7/0x7d4 [ 30.832258] [ 30.832475] Last potentially related work creation: [ 30.833058] kasan_save_stack+0x22/0x50 [ 30.833583] __kasan_record_aux_stack+0x8e/0xa0 [ 30.834155] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.834795] remove_vma+0x139/0x170 [ 30.835247] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.835811] do_vmi_munmap+0x1f1/0x2b0 [ 30.836303] __vm_munmap+0x138/0x3a0 [ 30.836778] __x64_sys_munmap+0x59/0x80 [ 30.837306] do_syscall_64+0x3f/0x90 [ 30.837783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.838429] [ 30.838647] The buggy address belongs to the object at ffff88800df4ae80 [ 30.838647] which belongs to the cache vm_area_struct of size 168 [ 30.840128] The buggy address is located 88 bytes inside of [ 30.840128] freed 168-byte region [ffff88800df4ae80, ffff88800df4af28) [ 30.841563] [ 30.841778] The buggy address belongs to the physical page: [ 30.842438] page:0000000089c381c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf4a [ 30.843521] memcg:ffff88800dfcce01 [ 30.843947] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.844605] page_type: 0xffffffff() [ 30.845056] raw: 0100000000000200 ffff8880087a0c80 ffffea000037ee80 dead000000000008 [ 30.846001] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfcce01 [ 30.846917] page dumped because: kasan: bad access detected [ 30.847589] [ 30.847810] Memory state around the buggy address: [ 30.848407] ffff88800df4ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.849291] ffff88800df4ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.850152] >ffff88800df4ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.851022] ^ [ 30.851765] ffff88800df4af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.852634] ffff88800df4af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.853494] ================================================================== [ 30.854591] Disabling lock debugging due to kernel taint [ 33.163172] BUG: Bad rss-counter state mm:0000000092babc68 type:MM_FILEPAGES val:33 [ 33.164320] BUG: Bad rss-counter state mm:0000000092babc68 type:MM_ANONPAGES val:22 [ 33.599454] BUG: Bad rss-counter state mm:00000000c3418c1f type:MM_FILEPAGES val:33 [ 33.600623] BUG: Bad rss-counter state mm:00000000c3418c1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64109' (ECDSA) to the list of known hosts. 2023/06/20 17:02:49 fuzzer started 2023/06/20 17:02:50 dialing manager at localhost:36067 2023/06/20 17:02:50 checking machine... 2023/06/20 17:02:50 checking revisions... [ 34.204889] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:02:50 testing simple program... [ 34.256933] cgroup: Unknown subsys name 'net' [ 34.293773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:02:49 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=0000000000000001 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=00007fee920ad440 CR3=00000000188ea000 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=2039343a32303a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a32303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800fbd6fe0 RCX=ffffffff860d8201 RDX=0000000000000000 RSI=ffffffff8180c6a2 RDI=ffff88800fbd6fec RBP=0000000000000000 RSP=ffff88800fbd6ef8 R8 =ffffffff860d825a R9 =ffff88800fbd6f58 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800fbd6fe0 R13=0000000000000000 R14=ffff888016523680 R15=0000000000092800 RIP=ffffffff813ad506 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 00007f612650d900 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=00007f61264d7008 CR3=000000000e5ac000 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=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