syzkaller login: [ 33.222512] BUG: Bad rss-counter state mm:0000000071687c64 type:MM_FILEPAGES val:33 [ 33.223727] BUG: Bad rss-counter state mm:0000000071687c64 type:MM_ANONPAGES val:22 [ 33.372227] ================================================================== [ 33.373146] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.374083] Read of size 8 at addr ffff88800f667df0 by task sshd/220 [ 33.374853] [ 33.375071] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.376105] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.377090] Call Trace: [ 33.377415] [ 33.377828] dump_stack_lvl+0x91/0xf0 [ 33.378413] print_report+0xcc/0x620 [ 33.378988] ? __virt_addr_valid+0x102/0x340 [ 33.379645] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.380374] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.381135] kasan_report+0xbe/0xf0 [ 33.381703] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.382467] vma_interval_tree_remove+0xc75/0xec0 [ 33.383211] vma_prepare+0xc54/0x11a0 [ 33.383807] __split_vma+0x5af/0x950 [ 33.384389] ? __pfx___split_vma+0x10/0x10 [ 33.385043] ? find_held_lock+0x2c/0x110 [ 33.385685] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.386380] ? lock_is_held_type+0x9f/0x120 [ 33.387044] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.387790] ? mtree_range_walk+0x632/0x900 [ 33.388464] ? mas_walk+0x5c7/0x7c0 [ 33.389076] do_vmi_munmap+0x1f1/0x2b0 [ 33.389667] mmap_region+0x1f9/0x2660 [ 33.390157] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.390676] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.391393] ? __pfx_lock_acquire+0x10/0x10 [ 33.391932] ? __pfx_mmap_region+0x10/0x10 [ 33.392468] ? security_mmap_addr+0x7d/0xa0 [ 33.393014] ? get_unmapped_area+0x1f5/0x3f0 [ 33.393569] do_mmap+0x854/0xf00 [ 33.394009] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.394509] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.395076] ksys_mmap_pgoff+0x3af/0x500 [ 33.395595] do_syscall_64+0x3f/0x90 [ 33.396073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.396735] RIP: 0033:0x7f3464613d82 [ 33.397198] 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 [ 33.399347] RSP: 002b:00007ffe58266008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.400262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3464613d82 [ 33.401132] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3463a4d000 [ 33.401991] RBP: 00007f3463a4d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.402853] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624e372fec0 [ 33.403718] R13: 00007ffe58266020 R14: 00007ffe58266050 R15: 00007ffe582663b0 [ 33.404587] [ 33.404900] [ 33.405121] Allocated by task 213: [ 33.405559] kasan_save_stack+0x22/0x50 [ 33.406072] kasan_set_track+0x25/0x30 [ 33.406579] __kasan_slab_alloc+0x59/0x70 [ 33.407108] kmem_cache_alloc+0x16b/0x370 [ 33.407630] vm_area_dup+0x20/0x160 [ 33.408084] __split_vma+0x170/0x950 [ 33.408563] split_vma+0xc6/0x110 [ 33.409011] mprotect_fixup+0x8d2/0xb30 [ 33.409525] do_mprotect_pkey+0x87e/0xd40 [ 33.410060] __x64_sys_mprotect+0x78/0xc0 [ 33.410599] do_syscall_64+0x3f/0x90 [ 33.411078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.411731] [ 33.411955] Freed by task 213: [ 33.412357] kasan_save_stack+0x22/0x50 [ 33.412876] kasan_set_track+0x25/0x30 [ 33.413372] kasan_save_free_info+0x2b/0x50 [ 33.413910] __kasan_slab_free+0x10a/0x190 [ 33.414446] kmem_cache_free+0x10d/0x4d0 [ 33.414961] rcu_core+0x8c8/0x2860 [ 33.415412] __do_softirq+0x1b7/0x7d4 [ 33.415891] [ 33.416106] Last potentially related work creation: [ 33.416791] kasan_save_stack+0x22/0x50 [ 33.417306] __kasan_record_aux_stack+0x8e/0xa0 [ 33.417887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.418533] remove_vma+0x139/0x170 [ 33.418991] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.419556] do_vmi_munmap+0x1f1/0x2b0 [ 33.420048] __vm_munmap+0x138/0x3a0 [ 33.420522] __x64_sys_munmap+0x59/0x80 [ 33.421055] do_syscall_64+0x3f/0x90 [ 33.421536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.422185] [ 33.422402] The buggy address belongs to the object at ffff88800f667d98 [ 33.422402] which belongs to the cache vm_area_struct of size 168 [ 33.423889] The buggy address is located 88 bytes inside of [ 33.423889] freed 168-byte region [ffff88800f667d98, ffff88800f667e40) [ 33.425332] [ 33.425553] The buggy address belongs to the physical page: [ 33.426220] page:00000000cbd5b989 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf667 [ 33.427306] memcg:ffff88800c6f0c01 [ 33.427739] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.428388] page_type: 0xffffffff() [ 33.428856] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.429791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6f0c01 [ 33.430710] page dumped because: kasan: bad access detected [ 33.431372] [ 33.431592] Memory state around the buggy address: [ 33.432176] ffff88800f667c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.433054] ffff88800f667d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.433919] >ffff88800f667d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.434784] ^ [ 33.435605] ffff88800f667e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.436476] ffff88800f667e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.437346] ================================================================== [ 33.438274] Disabling lock debugging due to kernel taint [ 35.782687] BUG: Bad rss-counter state mm:000000009dca2bfc type:MM_FILEPAGES val:33 [ 35.783850] BUG: Bad rss-counter state mm:000000009dca2bfc type:MM_ANONPAGES val:22 [ 36.248790] BUG: Bad rss-counter state mm:00000000cba7e911 type:MM_FILEPAGES val:33 [ 36.250062] BUG: Bad rss-counter state mm:00000000cba7e911 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62239' (ECDSA) to the list of known hosts. 2023/06/19 10:57:40 fuzzer started 2023/06/19 10:57:41 dialing manager at localhost:44161 2023/06/19 10:57:41 checking machine... 2023/06/19 10:57:41 checking revisions... [ 36.900729] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:57:41 testing simple program... [ 36.952024] cgroup: Unknown subsys name 'net' [ 37.016730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:57:38 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000008 RCX=ffffffff8449eeda RDX=00007f201222c044 RSI=00007f2012216fff RDI=0000000000000006 RBP=ffff88801cd47208 RSP=ffff888019c47cc0 R8 =0000000000000006 R9 =00007f2012216fff R10=00007f201222c044 R11=0000000000000000 R12=0000000000000000 R13=000000000000000e R14=00007f201222c044 R15=00007f2012216fff RIP=ffffffff814c01d0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f20116d8900 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=00007f201222c044 CR3=000000001a388000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=95f705bb3951edf17b99b0d862729a29 XMM04=5a6a3e513ff4a622fc62a87957e06423 XMM05=00000000000000000000000000000000 XMM06=5a6a05513951a6227b62a87957726423 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800ca60001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800ca5f901 RSI=ffff88800ca5f900 RDI=ffff88800ca5f370 RBP=ffff88800ca5f900 RSP=ffff88800ca5f2c8 R8 =ffffffff86136d80 R9 =ffff88800ca5f3a0 R10=0000000000038001 R11=0000000000020c48 R12=0000000000000008 R13=ffff88800ca58000 R14=ffff88800ca5f908 R15=ffff88800ca5f360 RIP=ffffffff811304ce RFL=00000296 [--S-AP-] 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 00007f75053d0700 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=00007faa2de6cfc0 CR3=000000000e47a000 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=2030343a37353a3031203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a37353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000