syzkaller login: [ 43.702505] BUG: Bad rss-counter state mm:00000000a1c3c997 type:MM_FILEPAGES val:33 [ 43.703668] BUG: Bad rss-counter state mm:00000000a1c3c997 type:MM_ANONPAGES val:22 [ 43.864587] ================================================================== [ 43.865679] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.866784] Read of size 8 at addr ffff88800ea82058 by task sshd/219 [ 43.867763] [ 43.868085] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.869159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.870184] Call Trace: [ 43.870510] [ 43.870796] dump_stack_lvl+0x91/0xf0 [ 43.871291] print_report+0xcc/0x620 [ 43.871787] ? __virt_addr_valid+0x102/0x340 [ 43.872368] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.872987] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.873603] kasan_report+0xbe/0xf0 [ 43.874087] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.874706] vma_interval_tree_remove+0xc75/0xec0 [ 43.875308] vma_prepare+0xc54/0x11a0 [ 43.875786] __split_vma+0x5af/0x950 [ 43.876270] ? __pfx___split_vma+0x10/0x10 [ 43.876801] ? find_held_lock+0x2c/0x110 [ 43.877332] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.877895] ? lock_is_held_type+0x9f/0x120 [ 43.878431] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.879044] ? mtree_range_walk+0x632/0x900 [ 43.879592] ? mas_walk+0x5c7/0x7c0 [ 43.880068] do_vmi_munmap+0x1f1/0x2b0 [ 43.880604] mmap_region+0x1f9/0x2660 [ 43.881086] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.881615] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.882337] ? __pfx_lock_acquire+0x10/0x10 [ 43.882888] ? __pfx_mmap_region+0x10/0x10 [ 43.883427] ? security_mmap_addr+0x7d/0xa0 [ 43.883987] ? get_unmapped_area+0x1f5/0x3f0 [ 43.884543] do_mmap+0x854/0xf00 [ 43.884995] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.885501] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.886065] ksys_mmap_pgoff+0x3af/0x500 [ 43.886581] do_syscall_64+0x3f/0x90 [ 43.887066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.887726] RIP: 0033:0x7faed336dd82 [ 43.888202] 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 [ 43.890412] RSP: 002b:00007ffe7c7b50e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.891335] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faed336dd82 [ 43.892202] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faed27a7000 [ 43.893051] RBP: 00007faed27a7000 R08: 0000000000000009 R09: 0000000000001000 [ 43.893894] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b8be86ec0 [ 43.894740] R13: 00007ffe7c7b5100 R14: 00007ffe7c7b5130 R15: 00007ffe7c7b5490 [ 43.895600] [ 43.895899] [ 43.896120] Allocated by task 212: [ 43.896547] kasan_save_stack+0x22/0x50 [ 43.897053] kasan_set_track+0x25/0x30 [ 43.897548] __kasan_slab_alloc+0x59/0x70 [ 43.898078] kmem_cache_alloc+0x16b/0x370 [ 43.898605] vm_area_dup+0x20/0x160 [ 43.899068] __split_vma+0x170/0x950 [ 43.899560] split_vma+0xc6/0x110 [ 43.900009] mprotect_fixup+0x8d2/0xb30 [ 43.900532] do_mprotect_pkey+0x87e/0xd40 [ 43.901056] __x64_sys_mprotect+0x78/0xc0 [ 43.901579] do_syscall_64+0x3f/0x90 [ 43.902053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.902695] [ 43.902910] Freed by task 13: [ 43.903299] kasan_save_stack+0x22/0x50 [ 43.903811] kasan_set_track+0x25/0x30 [ 43.904312] kasan_save_free_info+0x2b/0x50 [ 43.904843] __kasan_slab_free+0x10a/0x190 [ 43.905377] kmem_cache_free+0x10d/0x4d0 [ 43.905884] rcu_core+0x8c8/0x2860 [ 43.906339] __do_softirq+0x1b7/0x7d4 [ 43.906816] [ 43.907035] Last potentially related work creation: [ 43.907625] kasan_save_stack+0x22/0x50 [ 43.908134] __kasan_record_aux_stack+0x8e/0xa0 [ 43.908709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.909413] remove_vma+0x139/0x170 [ 43.909868] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.910433] do_vmi_munmap+0x1f1/0x2b0 [ 43.910916] __vm_munmap+0x138/0x3a0 [ 43.911385] __x64_sys_munmap+0x59/0x80 [ 43.911887] do_syscall_64+0x3f/0x90 [ 43.912379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.913021] [ 43.913236] Second to last potentially related work creation: [ 43.913928] kasan_save_stack+0x22/0x50 [ 43.914431] __kasan_record_aux_stack+0x8e/0xa0 [ 43.915004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.915653] remove_vma+0x139/0x170 [ 43.916115] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.916676] do_vmi_munmap+0x1f1/0x2b0 [ 43.917161] mmap_region+0x1f9/0x2660 [ 43.917637] do_mmap+0x854/0xf00 [ 43.918067] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.918554] ksys_mmap_pgoff+0x3af/0x500 [ 43.919054] do_syscall_64+0x3f/0x90 [ 43.919528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.920186] [ 43.920401] The buggy address belongs to the object at ffff88800ea82000 [ 43.920401] which belongs to the cache vm_area_struct of size 168 [ 43.921869] The buggy address is located 88 bytes inside of [ 43.921869] freed 168-byte region [ffff88800ea82000, ffff88800ea820a8) [ 43.923262] [ 43.923478] The buggy address belongs to the physical page: [ 43.924214] page:00000000734b6302 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea82 [ 43.925303] memcg:ffff88800ea6f101 [ 43.925726] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.926372] page_type: 0xffffffff() [ 43.926822] raw: 0100000000000200 ffff88800879fc80 ffffea0000387f00 dead000000000006 [ 43.927734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea6f101 [ 43.928648] page dumped because: kasan: bad access detected [ 43.929312] [ 43.929529] Memory state around the buggy address: [ 43.930105] ffff88800ea81f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 43.930960] ffff88800ea81f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.931822] >ffff88800ea82000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.932693] ^ [ 43.933425] ffff88800ea82080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 43.934281] ffff88800ea82100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.935143] ================================================================== [ 43.936058] Disabling lock debugging due to kernel taint [ 45.937664] BUG: Bad rss-counter state mm:0000000066490e42 type:MM_FILEPAGES val:33 [ 45.938841] BUG: Bad rss-counter state mm:0000000066490e42 type:MM_ANONPAGES val:22 [ 46.320902] BUG: Bad rss-counter state mm:00000000fcab33c5 type:MM_FILEPAGES val:33 [ 46.321906] BUG: Bad rss-counter state mm:00000000fcab33c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58350' (ECDSA) to the list of known hosts. 2023/06/19 16:39:17 fuzzer started 2023/06/19 16:39:17 dialing manager at localhost:44161 2023/06/19 16:39:17 checking machine... 2023/06/19 16:39:17 checking revisions... [ 46.996942] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:39:17 testing simple program... [ 47.044060] cgroup: Unknown subsys name 'net' [ 47.081029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:39:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016634260 RCX=ffff88800844f780 RDX=ffffea0000598d00 RSI=ffff888016632e40 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888015adfc18 R8 =ffff888016634000 R9 =0000000000000000 R10=ffffea0000598c80 R11=00000000800d0009 R12=dffffc0000000000 R13=ffff888015adfc58 R14=ffff88800844f780 R15=ffff888016632e40 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007f7b3525e900 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=00007f7b35815618 CR3=000000001598e000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fbd42be6980 CR3=0000000016a5c000 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=39333a3631203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343039 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000