syzkaller login: [ 32.151092] BUG: Bad rss-counter state mm:0000000024b735b6 type:MM_FILEPAGES val:33 [ 32.152293] BUG: Bad rss-counter state mm:0000000024b735b6 type:MM_ANONPAGES val:22 [ 32.315364] ================================================================== [ 32.316461] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.317589] Read of size 8 at addr ffff88800d53cd08 by task sshd/221 [ 32.318434] [ 32.318675] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.319652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.320731] Call Trace: [ 32.321084] [ 32.321397] dump_stack_lvl+0x91/0xf0 [ 32.321941] print_report+0xcc/0x620 [ 32.322475] ? __virt_addr_valid+0x102/0x340 [ 32.323080] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.323773] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.324454] kasan_report+0xbe/0xf0 [ 32.324977] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.325659] vma_interval_tree_remove+0xc75/0xec0 [ 32.326325] vma_prepare+0xc54/0x11a0 [ 32.326858] __split_vma+0x5af/0x950 [ 32.327388] ? __pfx___split_vma+0x10/0x10 [ 32.327989] ? find_held_lock+0x2c/0x110 [ 32.328567] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.329199] ? lock_is_held_type+0x9f/0x120 [ 32.329801] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.330472] ? mtree_range_walk+0x632/0x900 [ 32.331075] ? mas_walk+0x5c7/0x7c0 [ 32.331599] do_vmi_munmap+0x1f1/0x2b0 [ 32.332146] mmap_region+0x1f9/0x2660 [ 32.332678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.333247] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.334029] ? __pfx_lock_acquire+0x10/0x10 [ 32.334615] ? __pfx_mmap_region+0x10/0x10 [ 32.335197] ? security_mmap_addr+0x7d/0xa0 [ 32.335788] ? get_unmapped_area+0x1f5/0x3f0 [ 32.336387] do_mmap+0x854/0xf00 [ 32.336864] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.337399] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.338000] ksys_mmap_pgoff+0x3af/0x500 [ 32.338544] do_syscall_64+0x3f/0x90 [ 32.339059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.339772] RIP: 0033:0x7ff10081cd82 [ 32.340269] 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 [ 32.342553] RSP: 002b:00007ffecedbca28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.343525] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff10081cd82 [ 32.344468] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0ffc56000 [ 32.345395] RBP: 00007ff0ffc56000 R08: 0000000000000009 R09: 0000000000001000 [ 32.346319] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f28fbabf70 [ 32.347248] R13: 00007ffecedbca40 R14: 00007ffecedbca70 R15: 00007ffecedbcdd0 [ 32.348199] [ 32.348519] [ 32.348756] Allocated by task 214: [ 32.349228] kasan_save_stack+0x22/0x50 [ 32.349785] kasan_set_track+0x25/0x30 [ 32.350326] __kasan_slab_alloc+0x59/0x70 [ 32.350906] kmem_cache_alloc+0x16b/0x370 [ 32.351473] vm_area_dup+0x20/0x160 [ 32.351990] __split_vma+0x170/0x950 [ 32.352508] split_vma+0xc6/0x110 [ 32.352989] mprotect_fixup+0x8d2/0xb30 [ 32.353541] do_mprotect_pkey+0x87e/0xd40 [ 32.354119] __x64_sys_mprotect+0x78/0xc0 [ 32.354691] do_syscall_64+0x3f/0x90 [ 32.355212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.355934] [ 32.356171] Freed by task 214: [ 32.356602] kasan_save_stack+0x22/0x50 [ 32.357155] kasan_set_track+0x25/0x30 [ 32.357703] kasan_save_free_info+0x2b/0x50 [ 32.358288] __kasan_slab_free+0x10a/0x190 [ 32.358873] kmem_cache_free+0x10d/0x4d0 [ 32.359432] rcu_core+0x8c8/0x2860 [ 32.359939] __do_softirq+0x1b7/0x7d4 [ 32.360465] [ 32.360699] Last potentially related work creation: [ 32.361338] kasan_save_stack+0x22/0x50 [ 32.361899] __kasan_record_aux_stack+0x8e/0xa0 [ 32.362536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.363237] remove_vma+0x139/0x170 [ 32.363731] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.364353] do_vmi_munmap+0x1f1/0x2b0 [ 32.364892] __vm_munmap+0x138/0x3a0 [ 32.365406] __x64_sys_munmap+0x59/0x80 [ 32.365956] do_syscall_64+0x3f/0x90 [ 32.366474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.367176] [ 32.367415] Second to last potentially related work creation: [ 32.368176] kasan_save_stack+0x22/0x50 [ 32.368731] __kasan_record_aux_stack+0x8e/0xa0 [ 32.369364] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.370071] remove_vma+0x139/0x170 [ 32.370567] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.371185] do_vmi_munmap+0x1f1/0x2b0 [ 32.371725] mmap_region+0x1f9/0x2660 [ 32.372276] do_mmap+0x854/0xf00 [ 32.372753] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.373287] ksys_mmap_pgoff+0x3af/0x500 [ 32.373840] do_syscall_64+0x3f/0x90 [ 32.374363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.375073] [ 32.375311] The buggy address belongs to the object at ffff88800d53ccb0 [ 32.375311] which belongs to the cache vm_area_struct of size 168 [ 32.376939] The buggy address is located 88 bytes inside of [ 32.376939] freed 168-byte region [ffff88800d53ccb0, ffff88800d53cd58) [ 32.378487] [ 32.378728] The buggy address belongs to the physical page: [ 32.379455] page:00000000ffe54e7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd53c [ 32.380661] memcg:ffff888009a1d401 [ 32.381127] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.381839] page_type: 0xffffffff() [ 32.382338] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.383346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a1d401 [ 32.384362] page dumped because: kasan: bad access detected [ 32.385097] [ 32.385335] Memory state around the buggy address: [ 32.385979] ffff88800d53cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.386924] ffff88800d53cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.387871] >ffff88800d53cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.388810] ^ [ 32.389296] ffff88800d53cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.390236] ffff88800d53ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.391172] ================================================================== [ 32.392514] Disabling lock debugging due to kernel taint [ 34.263068] BUG: Bad rss-counter state mm:000000006ce89fb7 type:MM_FILEPAGES val:33 [ 34.264096] BUG: Bad rss-counter state mm:000000006ce89fb7 type:MM_ANONPAGES val:22 [ 34.721132] BUG: Bad rss-counter state mm:000000006069447a type:MM_FILEPAGES val:33 [ 34.722126] BUG: Bad rss-counter state mm:000000006069447a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29320' (ECDSA) to the list of known hosts. 2023/06/19 20:58:42 fuzzer started 2023/06/19 20:58:42 dialing manager at localhost:44161 2023/06/19 20:58:42 checking machine... 2023/06/19 20:58:42 checking revisions... [ 35.456865] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:58:42 testing simple program... [ 35.498790] cgroup: Unknown subsys name 'net' [ 35.537985] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:58:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab4224 RDI=ffff88801976ba74 RBP=ffff88801976b680 RSP=ffff888015a974d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000009ae000009ae R12=ffff88801976b680 R13=0000000000000067 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff813744d5 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 00007fc8ac963900 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=00007ffc33929000 CR3=00000000147c6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffff888008c58400 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=00007eff490942c0 CR3=000000000e14a000 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=2031343a38353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a38353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000