syzkaller login: [ 61.377663] BUG: Bad rss-counter state mm:00000000a398aafb type:MM_FILEPAGES val:33 [ 61.379034] BUG: Bad rss-counter state mm:00000000a398aafb type:MM_ANONPAGES val:22 [ 61.513295] ================================================================== [ 61.514244] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.515197] Read of size 8 at addr ffff8880097943f8 by task sshd/218 [ 61.515977] [ 61.516192] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.517244] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.518245] Call Trace: [ 61.518571] [ 61.518865] dump_stack_lvl+0x91/0xf0 [ 61.519493] print_report+0xcc/0x620 [ 61.520084] ? __virt_addr_valid+0x102/0x340 [ 61.520744] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.521474] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.522251] kasan_report+0xbe/0xf0 [ 61.522832] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.523588] vma_interval_tree_remove+0xc75/0xec0 [ 61.524334] vma_prepare+0xc54/0x11a0 [ 61.524920] __split_vma+0x5af/0x950 [ 61.525510] ? __pfx___split_vma+0x10/0x10 [ 61.526174] ? find_held_lock+0x2c/0x110 [ 61.526818] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.527518] ? lock_is_held_type+0x9f/0x120 [ 61.528184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.528940] ? mtree_range_walk+0x632/0x900 [ 61.529640] ? mas_walk+0x5c7/0x7c0 [ 61.530152] do_vmi_munmap+0x1f1/0x2b0 [ 61.530648] mmap_region+0x1f9/0x2660 [ 61.531151] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.531665] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.532387] ? __pfx_lock_acquire+0x10/0x10 [ 61.532925] ? __pfx_mmap_region+0x10/0x10 [ 61.533459] ? security_mmap_addr+0x7d/0xa0 [ 61.534008] ? get_unmapped_area+0x1f5/0x3f0 [ 61.534566] do_mmap+0x854/0xf00 [ 61.535026] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.535526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.536098] ksys_mmap_pgoff+0x3af/0x500 [ 61.536613] do_syscall_64+0x3f/0x90 [ 61.537099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.537754] RIP: 0033:0x7f4d372c2d82 [ 61.538219] 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 [ 61.540348] RSP: 002b:00007ffd74c903e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.541266] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d372c2d82 [ 61.542136] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d366fc000 [ 61.542980] RBP: 00007f4d366fc000 R08: 0000000000000009 R09: 0000000000001000 [ 61.543841] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557f4ccff70 [ 61.544683] R13: 00007ffd74c90400 R14: 00007ffd74c90430 R15: 00007ffd74c90790 [ 61.545544] [ 61.545858] [ 61.546077] Allocated by task 211: [ 61.546506] kasan_save_stack+0x22/0x50 [ 61.547016] kasan_set_track+0x25/0x30 [ 61.547519] __kasan_slab_alloc+0x59/0x70 [ 61.548048] kmem_cache_alloc+0x16b/0x370 [ 61.548568] vm_area_dup+0x20/0x160 [ 61.549046] __split_vma+0x170/0x950 [ 61.549522] split_vma+0xc6/0x110 [ 61.550004] mprotect_fixup+0x8d2/0xb30 [ 61.550505] do_mprotect_pkey+0x87e/0xd40 [ 61.551041] __x64_sys_mprotect+0x78/0xc0 [ 61.551565] do_syscall_64+0x3f/0x90 [ 61.552050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.552700] [ 61.552915] Freed by task 211: [ 61.553311] kasan_save_stack+0x22/0x50 [ 61.553839] kasan_set_track+0x25/0x30 [ 61.554341] kasan_save_free_info+0x2b/0x50 [ 61.554884] __kasan_slab_free+0x10a/0x190 [ 61.555427] kmem_cache_free+0x10d/0x4d0 [ 61.555939] rcu_core+0x8c8/0x2860 [ 61.556389] __do_softirq+0x1b7/0x7d4 [ 61.556868] [ 61.557086] Last potentially related work creation: [ 61.557690] kasan_save_stack+0x22/0x50 [ 61.558326] __kasan_record_aux_stack+0x8e/0xa0 [ 61.558905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.559571] remove_vma+0x139/0x170 [ 61.560039] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.560608] do_vmi_munmap+0x1f1/0x2b0 [ 61.561107] __vm_munmap+0x138/0x3a0 [ 61.561584] __x64_sys_munmap+0x59/0x80 [ 61.562112] do_syscall_64+0x3f/0x90 [ 61.562587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.563253] [ 61.563473] Second to last potentially related work creation: [ 61.564177] kasan_save_stack+0x22/0x50 [ 61.564686] __kasan_record_aux_stack+0x8e/0xa0 [ 61.565272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.565939] remove_vma+0x139/0x170 [ 61.566405] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.566983] do_vmi_munmap+0x1f1/0x2b0 [ 61.567481] mmap_region+0x1f9/0x2660 [ 61.567969] do_mmap+0x854/0xf00 [ 61.568411] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.568914] ksys_mmap_pgoff+0x3af/0x500 [ 61.569416] do_syscall_64+0x3f/0x90 [ 61.569901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.570549] [ 61.570774] The buggy address belongs to the object at ffff8880097943a0 [ 61.570774] which belongs to the cache vm_area_struct of size 168 [ 61.572264] The buggy address is located 88 bytes inside of [ 61.572264] freed 168-byte region [ffff8880097943a0, ffff888009794448) [ 61.573701] [ 61.573928] The buggy address belongs to the physical page: [ 61.574596] page:000000000428ea6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9794 [ 61.575708] memcg:ffff88800e5b1d01 [ 61.576148] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.576817] page_type: 0xffffffff() [ 61.577273] raw: 0100000000000200 ffff88800879fc80 ffffea000025e580 dead000000000008 [ 61.578232] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5b1d01 [ 61.579167] page dumped because: kasan: bad access detected [ 61.579845] [ 61.580068] Memory state around the buggy address: [ 61.580671] ffff888009794280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 61.581551] ffff888009794300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 61.582432] >ffff888009794380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.583299] ^ [ 61.584141] ffff888009794400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.585019] ffff888009794480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.585886] ================================================================== [ 61.586821] Disabling lock debugging due to kernel taint [ 63.605175] BUG: Bad rss-counter state mm:00000000a70c8042 type:MM_FILEPAGES val:33 [ 63.606616] BUG: Bad rss-counter state mm:00000000a70c8042 type:MM_ANONPAGES val:22 [ 64.083401] BUG: Bad rss-counter state mm:000000007f6d662c type:MM_FILEPAGES val:33 [ 64.084416] BUG: Bad rss-counter state mm:000000007f6d662c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11603' (ECDSA) to the list of known hosts. 2023/06/19 18:49:34 fuzzer started 2023/06/19 18:49:34 dialing manager at localhost:44161 2023/06/19 18:49:34 checking machine... 2023/06/19 18:49:34 checking revisions... [ 64.768780] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:49:34 testing simple program... [ 64.821033] cgroup: Unknown subsys name 'net' [ 64.882230] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:49:33 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=00007f4e7627da70 CR3=0000000015cac000 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=2033333a39343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a39343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000101 RBX=00007fa088c88be7 RCX=0000000000000100 RDX=ffff888019feb680 RSI=ffffffff813a0ab6 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88806cf099f8 R8 =0000000000000006 R9 =00007fa088c88be7 R10=ffffffffffffffff R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888019feb680 R15=ffff88800eee8b80 RIP=ffffffff814c0800 RFL=00000206 [-----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 00007fa0887a6900 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=00007ffe1b39f000 CR3=000000000eb68000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000