syzkaller login: [ 32.629167] BUG: Bad rss-counter state mm:0000000073330f11 type:MM_FILEPAGES val:33 [ 32.630496] BUG: Bad rss-counter state mm:0000000073330f11 type:MM_ANONPAGES val:22 [ 32.782773] ================================================================== [ 32.783686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.784621] Read of size 8 at addr ffff88800d25d228 by task sshd/220 [ 32.785383] [ 32.785596] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.786612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.787592] Call Trace: [ 32.787936] [ 32.788231] dump_stack_lvl+0x91/0xf0 [ 32.788719] print_report+0xcc/0x620 [ 32.789199] ? __virt_addr_valid+0x102/0x340 [ 32.789767] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.790395] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.791012] kasan_report+0xbe/0xf0 [ 32.791482] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.792110] vma_interval_tree_remove+0xc75/0xec0 [ 32.792715] vma_prepare+0xc54/0x11a0 [ 32.793204] __split_vma+0x5af/0x950 [ 32.793682] ? __pfx___split_vma+0x10/0x10 [ 32.794216] ? find_held_lock+0x2c/0x110 [ 32.794741] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.795305] ? lock_is_held_type+0x9f/0x120 [ 32.795843] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.796460] ? mtree_range_walk+0x632/0x900 [ 32.797011] ? mas_walk+0x5c7/0x7c0 [ 32.797486] do_vmi_munmap+0x1f1/0x2b0 [ 32.797995] mmap_region+0x1f9/0x2660 [ 32.798479] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.798988] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.799702] ? __pfx_lock_acquire+0x10/0x10 [ 32.800238] ? __pfx_mmap_region+0x10/0x10 [ 32.800766] ? security_mmap_addr+0x7d/0xa0 [ 32.801298] ? get_unmapped_area+0x1f5/0x3f0 [ 32.801847] do_mmap+0x854/0xf00 [ 32.802294] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.802799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.803362] ksys_mmap_pgoff+0x3af/0x500 [ 32.803867] do_syscall_64+0x3f/0x90 [ 32.804343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.804989] RIP: 0033:0x7fc210529d82 [ 32.805449] 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 [ 32.807590] RSP: 002b:00007fff83a659f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.808489] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc210529d82 [ 32.809341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc20f963000 [ 32.810196] RBP: 00007fc20f963000 R08: 0000000000000009 R09: 0000000000001000 [ 32.811033] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a0638fd90 [ 32.811877] R13: 00007fff83a65a10 R14: 00007fff83a65a40 R15: 00007fff83a65da0 [ 32.812736] [ 32.813029] [ 32.813242] Allocated by task 213: [ 32.813670] kasan_save_stack+0x22/0x50 [ 32.814190] kasan_set_track+0x25/0x30 [ 32.814682] __kasan_slab_alloc+0x59/0x70 [ 32.815201] kmem_cache_alloc+0x16b/0x370 [ 32.815718] vm_area_dup+0x20/0x160 [ 32.816175] __split_vma+0x170/0x950 [ 32.816639] split_vma+0xc6/0x110 [ 32.817080] mprotect_fixup+0x8d2/0xb30 [ 32.817596] do_mprotect_pkey+0x87e/0xd40 [ 32.818123] __x64_sys_mprotect+0x78/0xc0 [ 32.818646] do_syscall_64+0x3f/0x90 [ 32.819117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.819756] [ 32.819975] Freed by task 213: [ 32.820368] kasan_save_stack+0x22/0x50 [ 32.820868] kasan_set_track+0x25/0x30 [ 32.821370] kasan_save_free_info+0x2b/0x50 [ 32.821923] __kasan_slab_free+0x10a/0x190 [ 32.822460] kmem_cache_free+0x10d/0x4d0 [ 32.822970] rcu_core+0x8c8/0x2860 [ 32.823410] __do_softirq+0x1b7/0x7d4 [ 32.823887] [ 32.824105] Last potentially related work creation: [ 32.824694] kasan_save_stack+0x22/0x50 [ 32.825193] __kasan_record_aux_stack+0x8e/0xa0 [ 32.825764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.826412] remove_vma+0x139/0x170 [ 32.826861] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.827418] do_vmi_munmap+0x1f1/0x2b0 [ 32.827898] __vm_munmap+0x138/0x3a0 [ 32.828376] __x64_sys_munmap+0x59/0x80 [ 32.828873] do_syscall_64+0x3f/0x90 [ 32.829343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.829989] [ 32.830205] Second to last potentially related work creation: [ 32.830878] kasan_save_stack+0x22/0x50 [ 32.831377] __kasan_record_aux_stack+0x8e/0xa0 [ 32.831960] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.832601] remove_vma+0x139/0x170 [ 32.833052] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.833609] do_vmi_munmap+0x1f1/0x2b0 [ 32.834123] mmap_region+0x1f9/0x2660 [ 32.834601] do_mmap+0x854/0xf00 [ 32.835030] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.835516] ksys_mmap_pgoff+0x3af/0x500 [ 32.836019] do_syscall_64+0x3f/0x90 [ 32.836489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.837137] [ 32.837350] The buggy address belongs to the object at ffff88800d25d1d0 [ 32.837350] which belongs to the cache vm_area_struct of size 168 [ 32.838826] The buggy address is located 88 bytes inside of [ 32.838826] freed 168-byte region [ffff88800d25d1d0, ffff88800d25d278) [ 32.840213] [ 32.840430] The buggy address belongs to the physical page: [ 32.841083] page:0000000047e15e13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd25d [ 32.842176] memcg:ffff88800d30e901 [ 32.842603] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.843307] page_type: 0xffffffff() [ 32.843754] raw: 0100000000000200 ffff88800879fc80 ffffea0000381b40 dead000000000005 [ 32.844666] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d30e901 [ 32.845574] page dumped because: kasan: bad access detected [ 32.846248] [ 32.846462] Memory state around the buggy address: [ 32.847049] ffff88800d25d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.847918] ffff88800d25d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.848767] >ffff88800d25d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.849613] ^ [ 32.850184] ffff88800d25d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.851041] ffff88800d25d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.851898] ================================================================== [ 32.852983] Disabling lock debugging due to kernel taint [ 34.864977] BUG: Bad rss-counter state mm:00000000940b4a86 type:MM_FILEPAGES val:33 [ 34.866026] BUG: Bad rss-counter state mm:00000000940b4a86 type:MM_ANONPAGES val:22 [ 35.344812] BUG: Bad rss-counter state mm:000000006a7f4456 type:MM_FILEPAGES val:33 [ 35.346335] BUG: Bad rss-counter state mm:000000006a7f4456 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39993' (ECDSA) to the list of known hosts. 2023/06/20 04:40:52 fuzzer started 2023/06/20 04:40:52 dialing manager at localhost:44161 2023/06/20 04:40:52 checking machine... 2023/06/20 04:40:52 checking revisions... [ 36.151703] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:40:52 testing simple program... [ 36.203492] cgroup: Unknown subsys name 'net' [ 36.250101] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:40:50 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=00000000005b99b3 RCX=ffffffff813c86df RDX=ffff888015bb51c0 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff88806ce09db8 RSP=ffff88806ce09cf8 R8 =0000000000000004 R9 =00000000000a1377 R10=0000000000000000 R11=ffff88806ce09ff8 R12=00000000005b99b3 R13=00000000000a1377 R14=ffffffff85497f20 R15=0000000000000000 RIP=ffffffff813c86df RFL=00000046 [---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 00007f5116c61900 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=00007f5117218618 CR3=00000000146e2000 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=00007fcd8eecfb40 CR3=000000000e40c000 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=2031353a30343a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a30343a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000