syzkaller login: [ 31.676016] BUG: Bad rss-counter state mm:00000000d055651b type:MM_FILEPAGES val:33 [ 31.677697] BUG: Bad rss-counter state mm:00000000d055651b type:MM_ANONPAGES val:22 [ 31.799970] ================================================================== [ 31.800886] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.801846] Read of size 8 at addr ffff88800f239968 by task sshd/220 [ 31.802723] [ 31.802944] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.803804] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.804767] Call Trace: [ 31.805084] [ 31.805399] dump_stack_lvl+0x91/0xf0 [ 31.805925] print_report+0xcc/0x620 [ 31.806410] ? __virt_addr_valid+0x102/0x340 [ 31.806957] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.807575] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.808185] kasan_report+0xbe/0xf0 [ 31.808657] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.809285] vma_interval_tree_remove+0xc75/0xec0 [ 31.809928] vma_prepare+0xc54/0x11a0 [ 31.810408] __split_vma+0x5af/0x950 [ 31.810880] ? __pfx___split_vma+0x10/0x10 [ 31.811400] ? find_held_lock+0x2c/0x110 [ 31.811920] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.812477] ? lock_is_held_type+0x9f/0x120 [ 31.813012] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.813652] ? mtree_range_walk+0x632/0x900 [ 31.814237] ? mas_walk+0x5c7/0x7c0 [ 31.814715] do_vmi_munmap+0x1f1/0x2b0 [ 31.815201] mmap_region+0x1f9/0x2660 [ 31.815682] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.816183] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.816896] ? __pfx_lock_acquire+0x10/0x10 [ 31.817483] ? __pfx_mmap_region+0x10/0x10 [ 31.818052] ? security_mmap_addr+0x7d/0xa0 [ 31.818596] ? get_unmapped_area+0x1f5/0x3f0 [ 31.819162] do_mmap+0x854/0xf00 [ 31.819615] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.820123] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.820697] ksys_mmap_pgoff+0x3af/0x500 [ 31.821218] do_syscall_64+0x3f/0x90 [ 31.821753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.822435] RIP: 0033:0x7f75229bfd82 [ 31.822901] 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 [ 31.825088] RSP: 002b:00007ffe9cd6fe08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.826089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75229bfd82 [ 31.826958] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7521df9000 [ 31.827822] RBP: 00007f7521df9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.828688] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636da1a3d90 [ 31.829599] R13: 00007ffe9cd6fe20 R14: 00007ffe9cd6fe50 R15: 00007ffe9cd701b0 [ 31.830494] [ 31.830797] [ 31.831015] Allocated by task 213: [ 31.831456] kasan_save_stack+0x22/0x50 [ 31.831973] kasan_set_track+0x25/0x30 [ 31.832484] __kasan_slab_alloc+0x59/0x70 [ 31.833022] kmem_cache_alloc+0x16b/0x370 [ 31.833581] vm_area_dup+0x20/0x160 [ 31.834067] __split_vma+0x170/0x950 [ 31.834545] split_vma+0xc6/0x110 [ 31.834993] mprotect_fixup+0x8d2/0xb30 [ 31.835509] do_mprotect_pkey+0x87e/0xd40 [ 31.836043] __x64_sys_mprotect+0x78/0xc0 [ 31.836581] do_syscall_64+0x3f/0x90 [ 31.837074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.837776] [ 31.838037] Freed by task 220: [ 31.838439] kasan_save_stack+0x22/0x50 [ 31.838956] kasan_set_track+0x25/0x30 [ 31.839464] kasan_save_free_info+0x2b/0x50 [ 31.840013] __kasan_slab_free+0x10a/0x190 [ 31.840560] kmem_cache_free+0x10d/0x4d0 [ 31.841079] rcu_core+0x8c8/0x2860 [ 31.841569] __do_softirq+0x1b7/0x7d4 [ 31.842079] [ 31.842298] Last potentially related work creation: [ 31.842902] kasan_save_stack+0x22/0x50 [ 31.843414] __kasan_record_aux_stack+0x8e/0xa0 [ 31.844003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.844663] remove_vma+0x139/0x170 [ 31.845126] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.845745] do_vmi_munmap+0x1f1/0x2b0 [ 31.846270] __vm_munmap+0x138/0x3a0 [ 31.846747] __x64_sys_munmap+0x59/0x80 [ 31.847259] do_syscall_64+0x3f/0x90 [ 31.847747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.848404] [ 31.848625] The buggy address belongs to the object at ffff88800f239910 [ 31.848625] which belongs to the cache vm_area_struct of size 168 [ 31.850205] The buggy address is located 88 bytes inside of [ 31.850205] freed 168-byte region [ffff88800f239910, ffff88800f2399b8) [ 31.851647] [ 31.851865] The buggy address belongs to the physical page: [ 31.852543] page:000000009576b921 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf239 [ 31.853693] memcg:ffff8880166c7701 [ 31.854158] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.854823] page_type: 0xffffffff() [ 31.855286] raw: 0100000000000200 ffff88800879fc80 ffffea000035ac40 dead000000000004 [ 31.856225] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166c7701 [ 31.857153] page dumped because: kasan: bad access detected [ 31.857887] [ 31.858107] Memory state around the buggy address: [ 31.858704] ffff88800f239800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.859580] ffff88800f239880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.860458] >ffff88800f239900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.861368] ^ [ 31.862210] ffff88800f239980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.863092] ffff88800f239a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.863961] ================================================================== [ 31.865102] Disabling lock debugging due to kernel taint [ 33.764679] BUG: Bad rss-counter state mm:000000007b09557d type:MM_FILEPAGES val:33 [ 33.765664] BUG: Bad rss-counter state mm:000000007b09557d type:MM_ANONPAGES val:22 [ 34.237245] BUG: Bad rss-counter state mm:00000000445fffb6 type:MM_FILEPAGES val:33 [ 34.238878] BUG: Bad rss-counter state mm:00000000445fffb6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45520' (ECDSA) to the list of known hosts. 2023/06/19 22:48:09 fuzzer started 2023/06/19 22:48:10 dialing manager at localhost:44161 2023/06/19 22:48:10 checking machine... 2023/06/19 22:48:10 checking revisions... [ 34.939602] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:48:10 testing simple program... [ 34.992411] cgroup: Unknown subsys name 'net' [ 35.029085] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:48:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f90b6855c00 CR3=000000000db64000 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=2039303a38343a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a38343a3232203931 XMM08=00007f99900026b00000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007f245944fe07 RSP=ffff88806cf09a20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f245944fe07 R13=0000000000000000 R14=ffff888017a18000 R15=ffff88800c7de540 RIP=ffffffff814c8416 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 00007f24588bd900 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=00005594840c5c28 CR3=000000000ec64000 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