syzkaller login: [ 40.505860] BUG: Bad rss-counter state mm:00000000ffaaba56 type:MM_FILEPAGES val:33 [ 40.506755] BUG: Bad rss-counter state mm:00000000ffaaba56 type:MM_ANONPAGES val:22 [ 40.545271] ================================================================== [ 40.546017] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.546781] Read of size 8 at addr ffff88800ef60310 by task sshd/219 [ 40.547589] [ 40.547818] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.548788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.549590] Call Trace: [ 40.549852] [ 40.550099] dump_stack_lvl+0x91/0xf0 [ 40.550538] print_report+0xcc/0x620 [ 40.550969] ? __virt_addr_valid+0x102/0x340 [ 40.551433] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.551974] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.552519] kasan_report+0xbe/0xf0 [ 40.552960] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.553485] vma_interval_tree_remove+0xc75/0xec0 [ 40.553995] vma_prepare+0xc54/0x11a0 [ 40.554414] __split_vma+0x5af/0x950 [ 40.554844] ? __pfx___split_vma+0x10/0x10 [ 40.555283] ? find_held_lock+0x2c/0x110 [ 40.555749] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.556224] ? lock_is_held_type+0x9f/0x120 [ 40.556685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.557282] ? mtree_range_walk+0x632/0x900 [ 40.557744] ? mas_walk+0x5c7/0x7c0 [ 40.558142] do_vmi_munmap+0x1f1/0x2b0 [ 40.558559] mmap_region+0x1f9/0x2660 [ 40.558965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.559396] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.559995] ? __pfx_lock_acquire+0x10/0x10 [ 40.560454] ? __pfx_mmap_region+0x10/0x10 [ 40.560907] ? security_mmap_addr+0x7d/0xa0 [ 40.561359] ? get_unmapped_area+0x1f5/0x3f0 [ 40.561817] do_mmap+0x854/0xf00 [ 40.562184] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.562585] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.563041] ksys_mmap_pgoff+0x3af/0x500 [ 40.563468] do_syscall_64+0x3f/0x90 [ 40.563857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.564389] RIP: 0033:0x7fb41ea26d82 [ 40.564765] 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 [ 40.566500] RSP: 002b:00007ffc8a094788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.567245] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb41ea26d82 [ 40.567939] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb41de60000 [ 40.568651] RBP: 00007fb41de60000 R08: 0000000000000009 R09: 0000000000001000 [ 40.569352] R10: 0000000000000812 R11: 0000000000000206 R12: 000055988c9c5ec0 [ 40.570045] R13: 00007ffc8a0947a0 R14: 00007ffc8a0947d0 R15: 00007ffc8a094b30 [ 40.570752] [ 40.570993] [ 40.571171] Allocated by task 212: [ 40.571525] kasan_save_stack+0x22/0x50 [ 40.571938] kasan_set_track+0x25/0x30 [ 40.572353] __kasan_slab_alloc+0x59/0x70 [ 40.572784] kmem_cache_alloc+0x16b/0x370 [ 40.573213] vm_area_dup+0x20/0x160 [ 40.573582] __split_vma+0x170/0x950 [ 40.573963] split_vma+0xc6/0x110 [ 40.574317] mprotect_fixup+0x8d2/0xb30 [ 40.574728] do_mprotect_pkey+0x87e/0xd40 [ 40.575157] __x64_sys_mprotect+0x78/0xc0 [ 40.575589] do_syscall_64+0x3f/0x90 [ 40.575983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.576510] [ 40.576686] Freed by task 212: [ 40.577018] kasan_save_stack+0x22/0x50 [ 40.577433] kasan_set_track+0x25/0x30 [ 40.577838] kasan_save_free_info+0x2b/0x50 [ 40.578277] __kasan_slab_free+0x10a/0x190 [ 40.578710] kmem_cache_free+0x10d/0x4d0 [ 40.579126] rcu_core+0x8c8/0x2860 [ 40.579500] __do_softirq+0x1b7/0x7d4 [ 40.579890] [ 40.580068] Last potentially related work creation: [ 40.580563] kasan_save_stack+0x22/0x50 [ 40.580982] __kasan_record_aux_stack+0x8e/0xa0 [ 40.581452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.581976] remove_vma+0x139/0x170 [ 40.582347] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.582813] do_vmi_munmap+0x1f1/0x2b0 [ 40.583211] __vm_munmap+0x138/0x3a0 [ 40.583591] __x64_sys_munmap+0x59/0x80 [ 40.584003] do_syscall_64+0x3f/0x90 [ 40.584399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.584926] [ 40.585101] Second to last potentially related work creation: [ 40.585669] kasan_save_stack+0x22/0x50 [ 40.586082] __kasan_record_aux_stack+0x8e/0xa0 [ 40.586552] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.587081] remove_vma+0x139/0x170 [ 40.587451] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.587908] do_vmi_munmap+0x1f1/0x2b0 [ 40.588308] mmap_region+0x1f9/0x2660 [ 40.588723] do_mmap+0x854/0xf00 [ 40.589072] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.589476] ksys_mmap_pgoff+0x3af/0x500 [ 40.589893] do_syscall_64+0x3f/0x90 [ 40.590284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.590885] [ 40.591062] The buggy address belongs to the object at ffff88800ef602b8 [ 40.591062] which belongs to the cache vm_area_struct of size 168 [ 40.592280] The buggy address is located 88 bytes inside of [ 40.592280] freed 168-byte region [ffff88800ef602b8, ffff88800ef60360) [ 40.593461] [ 40.593634] The buggy address belongs to the physical page: [ 40.594175] page:00000000254cf4ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef60 [ 40.595071] memcg:ffff88800eb61601 [ 40.595426] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.596001] page_type: 0xffffffff() [ 40.596376] raw: 0100000000000200 ffff88800879fc80 ffffea00004eab00 dead000000000003 [ 40.597130] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb61601 [ 40.597884] page dumped because: kasan: bad access detected [ 40.598433] [ 40.598608] Memory state around the buggy address: [ 40.599082] ffff88800ef60200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.599795] ffff88800ef60280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.600515] >ffff88800ef60300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.601225] ^ [ 40.601608] ffff88800ef60380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 40.602311] ffff88800ef60400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 40.603017] ================================================================== [ 40.603885] Disabling lock debugging due to kernel taint [ 43.216491] BUG: Bad rss-counter state mm:00000000ae1178c7 type:MM_FILEPAGES val:33 [ 43.217484] BUG: Bad rss-counter state mm:00000000ae1178c7 type:MM_ANONPAGES val:22 [ 43.576080] BUG: Bad rss-counter state mm:00000000a3a729d1 type:MM_FILEPAGES val:33 [ 43.577160] BUG: Bad rss-counter state mm:00000000a3a729d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51910' (ECDSA) to the list of known hosts. 2023/06/19 17:41:09 fuzzer started 2023/06/19 17:41:10 dialing manager at localhost:44161 2023/06/19 17:41:10 checking machine... 2023/06/19 17:41:10 checking revisions... [ 44.313782] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:41:10 testing simple program... [ 44.369078] cgroup: Unknown subsys name 'net' [ 44.414751] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:41:05 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=00007fdcfcbff5e0 CR3=000000000e410000 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=8a11c6dcdcaad89b5344c296e4c280ff XMM02=ec2efd57dc4c00df000000000011d6a0 XMM03=35b7d4d8c3d8f97d000000000011d770 XMM04=d5c557b4817b202800000000000ae988 XMM05=57578f282af5a67b0000000000136098 XMM06=806171799158d9670000000000134b18 XMM07=fb795ef6d657705600000000001240b0 XMM08=2c67c8bc2e329bc3000000000011d710 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffffff856529e0 RCX=0000000080000000 RDX=ffff888016b451c0 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880096f77d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f02e1d91477 R13=0000000000000000 R14=ffff888016b451c0 R15=0000000000092cc0 RIP=ffffffff814c07f1 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 00007f02e189e900 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=00007f02e1e55618 CR3=000000001cc7a000 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=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