syzkaller login: [ 62.626928] BUG: Bad rss-counter state mm:00000000552a6130 type:MM_FILEPAGES val:33 [ 62.628266] BUG: Bad rss-counter state mm:00000000552a6130 type:MM_ANONPAGES val:22 [ 62.785625] ================================================================== [ 62.786486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.787379] Read of size 8 at addr ffff888009995310 by task sshd/220 [ 62.788100] [ 62.788308] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.789278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.790197] Call Trace: [ 62.790498] [ 62.790769] dump_stack_lvl+0x91/0xf0 [ 62.791307] print_report+0xcc/0x620 [ 62.791825] ? __virt_addr_valid+0x102/0x340 [ 62.792529] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.793301] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.794066] kasan_report+0xbe/0xf0 [ 62.794627] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.795411] vma_interval_tree_remove+0xc75/0xec0 [ 62.796195] vma_prepare+0xc54/0x11a0 [ 62.796806] __split_vma+0x5af/0x950 [ 62.797422] ? __pfx___split_vma+0x10/0x10 [ 62.798109] ? find_held_lock+0x2c/0x110 [ 62.798773] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.799533] ? lock_is_held_type+0x9f/0x120 [ 62.800122] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.800729] ? mtree_range_walk+0x632/0x900 [ 62.801292] ? mas_walk+0x5c7/0x7c0 [ 62.801768] do_vmi_munmap+0x1f1/0x2b0 [ 62.802291] mmap_region+0x1f9/0x2660 [ 62.802783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.803318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.804083] ? __pfx_lock_acquire+0x10/0x10 [ 62.804630] ? __pfx_mmap_region+0x10/0x10 [ 62.805182] ? security_mmap_addr+0x7d/0xa0 [ 62.805735] ? get_unmapped_area+0x1f5/0x3f0 [ 62.806312] do_mmap+0x854/0xf00 [ 62.806758] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.807274] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.807853] ksys_mmap_pgoff+0x3af/0x500 [ 62.808392] do_syscall_64+0x3f/0x90 [ 62.808893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.809560] RIP: 0033:0x7f55e1aedd82 [ 62.810041] 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 [ 62.812272] RSP: 002b:00007fff052e02b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.813207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55e1aedd82 [ 62.814097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55e0f27000 [ 62.815190] RBP: 00007f55e0f27000 R08: 0000000000000009 R09: 0000000000001000 [ 62.816070] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d111eaec0 [ 62.816921] R13: 00007fff052e02d0 R14: 00007fff052e0300 R15: 00007fff052e0660 [ 62.817793] [ 62.818106] [ 62.818326] Allocated by task 213: [ 62.818762] kasan_save_stack+0x22/0x50 [ 62.819290] kasan_set_track+0x25/0x30 [ 62.819808] __kasan_slab_alloc+0x59/0x70 [ 62.820345] kmem_cache_alloc+0x16b/0x370 [ 62.820871] vm_area_dup+0x20/0x160 [ 62.821357] __split_vma+0x170/0x950 [ 62.821829] split_vma+0xc6/0x110 [ 62.822285] mprotect_fixup+0x8d2/0xb30 [ 62.822797] do_mprotect_pkey+0x87e/0xd40 [ 62.823341] __x64_sys_mprotect+0x78/0xc0 [ 62.823892] do_syscall_64+0x3f/0x90 [ 62.824389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.825062] [ 62.825279] Freed by task 213: [ 62.825676] kasan_save_stack+0x22/0x50 [ 62.826193] kasan_set_track+0x25/0x30 [ 62.826693] kasan_save_free_info+0x2b/0x50 [ 62.827253] __kasan_slab_free+0x10a/0x190 [ 62.827793] kmem_cache_free+0x10d/0x4d0 [ 62.828312] rcu_core+0x8c8/0x2860 [ 62.828767] __do_softirq+0x1b7/0x7d4 [ 62.829273] [ 62.829575] Last potentially related work creation: [ 62.830182] kasan_save_stack+0x22/0x50 [ 62.830691] __kasan_record_aux_stack+0x8e/0xa0 [ 62.831294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.831969] remove_vma+0x139/0x170 [ 62.832432] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.833012] do_vmi_munmap+0x1f1/0x2b0 [ 62.833508] __vm_munmap+0x138/0x3a0 [ 62.834007] __x64_sys_munmap+0x59/0x80 [ 62.834502] do_syscall_64+0x3f/0x90 [ 62.834987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.835656] [ 62.835875] Second to last potentially related work creation: [ 62.836570] kasan_save_stack+0x22/0x50 [ 62.837098] __kasan_record_aux_stack+0x8e/0xa0 [ 62.837682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.838352] remove_vma+0x139/0x170 [ 62.838801] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.839380] do_vmi_munmap+0x1f1/0x2b0 [ 62.839873] mmap_region+0x1f9/0x2660 [ 62.840363] do_mmap+0x854/0xf00 [ 62.840802] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.841317] ksys_mmap_pgoff+0x3af/0x500 [ 62.841819] do_syscall_64+0x3f/0x90 [ 62.842305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.842959] [ 62.843186] The buggy address belongs to the object at ffff8880099952b8 [ 62.843186] which belongs to the cache vm_area_struct of size 168 [ 62.844697] The buggy address is located 88 bytes inside of [ 62.844697] freed 168-byte region [ffff8880099952b8, ffff888009995360) [ 62.846140] [ 62.846361] The buggy address belongs to the physical page: [ 62.847034] page:000000004e5e78de refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009995570 pfn:0x9995 [ 62.848279] memcg:ffff88800c500501 [ 62.848711] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.849386] page_type: 0xffffffff() [ 62.849845] raw: 0100000000000200 ffff88800879fc80 ffffea00003599c0 dead00000000000a [ 62.850780] raw: ffff888009995570 000000008011000a 00000001ffffffff ffff88800c500501 [ 62.851714] page dumped because: kasan: bad access detected [ 62.852403] [ 62.852619] Memory state around the buggy address: [ 62.853224] ffff888009995200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 62.854097] ffff888009995280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 62.854974] >ffff888009995300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 62.855867] ^ [ 62.856355] ffff888009995380: fc fc fc fc fb fb fb fb fb fb fb fb fb fb fb fb [ 62.857255] ffff888009995400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 62.858121] ================================================================== [ 62.859279] Disabling lock debugging due to kernel taint [ 65.860850] BUG: Bad rss-counter state mm:00000000cd59b823 type:MM_FILEPAGES val:33 [ 65.861827] BUG: Bad rss-counter state mm:00000000cd59b823 type:MM_ANONPAGES val:22 [ 66.290153] BUG: Bad rss-counter state mm:0000000067797811 type:MM_FILEPAGES val:33 [ 66.291327] BUG: Bad rss-counter state mm:0000000067797811 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56741' (ECDSA) to the list of known hosts. 2023/06/20 03:12:10 fuzzer started 2023/06/20 03:12:10 dialing manager at localhost:44161 2023/06/20 03:12:10 checking machine... 2023/06/20 03:12:10 checking revisions... [ 67.014878] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:12:10 testing simple program... [ 67.057055] cgroup: Unknown subsys name 'net' [ 67.106802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:11:43 Registers: info registers vcpu 0 RAX=0000000000015b5c RBX=ffff88806ce35000 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f3285b38d77 RSP=ffff888019c4fa48 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f3285b38000 R11=00000000000b6996 R12=ffff888019c4fb60 R13=0000000000000000 R14=ffff888016dc9b40 R15=ffff88800ecfe280 RIP=ffffffff8135b923 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 00007f3285651900 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=00007f3285c090b0 CR3=000000000db6a000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005600746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 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=00007f898ee00a50 CR3=0000000018c56000 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=2039303a32313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a32313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000