syzkaller login: [ 31.635580] BUG: Bad rss-counter state mm:000000007f26eec2 type:MM_FILEPAGES val:33 [ 31.636755] BUG: Bad rss-counter state mm:000000007f26eec2 type:MM_ANONPAGES val:22 [ 31.807626] ================================================================== [ 31.809062] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.810348] Read of size 8 at addr ffff88800df17310 by task sshd/220 [ 31.811265] [ 31.811527] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.812587] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.813773] Call Trace: [ 31.814176] [ 31.814517] dump_stack_lvl+0x91/0xf0 [ 31.815122] print_report+0xcc/0x620 [ 31.815712] ? __virt_addr_valid+0x102/0x340 [ 31.816406] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.817190] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.817954] kasan_report+0xbe/0xf0 [ 31.818527] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.819346] vma_interval_tree_remove+0xc75/0xec0 [ 31.820255] vma_prepare+0xc54/0x11a0 [ 31.820963] __split_vma+0x5af/0x950 [ 31.821571] ? __pfx___split_vma+0x10/0x10 [ 31.822224] ? find_held_lock+0x2c/0x110 [ 31.822874] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.823544] ? lock_is_held_type+0x9f/0x120 [ 31.824219] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.824983] ? mtree_range_walk+0x632/0x900 [ 31.825654] ? mas_walk+0x5c7/0x7c0 [ 31.826285] do_vmi_munmap+0x1f1/0x2b0 [ 31.826915] mmap_region+0x1f9/0x2660 [ 31.827535] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.828207] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.829150] ? __pfx_lock_acquire+0x10/0x10 [ 31.829841] ? __pfx_mmap_region+0x10/0x10 [ 31.830490] ? security_mmap_addr+0x7d/0xa0 [ 31.831144] ? get_unmapped_area+0x1f5/0x3f0 [ 31.831809] do_mmap+0x854/0xf00 [ 31.832411] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.833023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.833710] ksys_mmap_pgoff+0x3af/0x500 [ 31.834341] do_syscall_64+0x3f/0x90 [ 31.834940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.835711] RIP: 0033:0x7fe43e394d82 [ 31.836314] 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 [ 31.838896] RSP: 002b:00007ffcce642738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.840028] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe43e394d82 [ 31.841087] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe43d7ce000 [ 31.842130] RBP: 00007fe43d7ce000 R08: 0000000000000009 R09: 0000000000001000 [ 31.843166] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653e068cf70 [ 31.844324] R13: 00007ffcce642750 R14: 00007ffcce642780 R15: 00007ffcce642ae0 [ 31.845467] [ 31.845867] [ 31.846152] Allocated by task 213: [ 31.846719] kasan_save_stack+0x22/0x50 [ 31.847384] kasan_set_track+0x25/0x30 [ 31.848069] __kasan_slab_alloc+0x59/0x70 [ 31.848755] kmem_cache_alloc+0x16b/0x370 [ 31.849444] vm_area_dup+0x20/0x160 [ 31.850173] __split_vma+0x170/0x950 [ 31.850800] split_vma+0xc6/0x110 [ 31.851401] mprotect_fixup+0x8d2/0xb30 [ 31.852103] do_mprotect_pkey+0x87e/0xd40 [ 31.852786] __x64_sys_mprotect+0x78/0xc0 [ 31.853495] do_syscall_64+0x3f/0x90 [ 31.854115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.854983] [ 31.855267] Freed by task 13: [ 31.855768] kasan_save_stack+0x22/0x50 [ 31.856450] kasan_set_track+0x25/0x30 [ 31.857098] kasan_save_free_info+0x2b/0x50 [ 31.857801] __kasan_slab_free+0x10a/0x190 [ 31.858516] kmem_cache_free+0x10d/0x4d0 [ 31.859205] rcu_core+0x8c8/0x2860 [ 31.859782] __do_softirq+0x1b7/0x7d4 [ 31.860448] [ 31.860735] Last potentially related work creation: [ 31.861520] kasan_save_stack+0x22/0x50 [ 31.862192] __kasan_record_aux_stack+0x8e/0xa0 [ 31.862964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.863829] remove_vma+0x139/0x170 [ 31.864452] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.865208] do_vmi_munmap+0x1f1/0x2b0 [ 31.865860] __vm_munmap+0x138/0x3a0 [ 31.866476] __x64_sys_munmap+0x59/0x80 [ 31.867131] do_syscall_64+0x3f/0x90 [ 31.867749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.868624] [ 31.868936] Second to last potentially related work creation: [ 31.869847] kasan_save_stack+0x22/0x50 [ 31.870510] __kasan_record_aux_stack+0x8e/0xa0 [ 31.871275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.872136] remove_vma+0x139/0x170 [ 31.872741] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.873494] do_vmi_munmap+0x1f1/0x2b0 [ 31.874145] mmap_region+0x1f9/0x2660 [ 31.874763] do_mmap+0x854/0xf00 [ 31.875332] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.875974] ksys_mmap_pgoff+0x3af/0x500 [ 31.876641] do_syscall_64+0x3f/0x90 [ 31.877274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.878122] [ 31.878399] The buggy address belongs to the object at ffff88800df172b8 [ 31.878399] which belongs to the cache vm_area_struct of size 168 [ 31.880325] The buggy address is located 88 bytes inside of [ 31.880325] freed 168-byte region [ffff88800df172b8, ffff88800df17360) [ 31.882178] [ 31.882454] The buggy address belongs to the physical page: [ 31.883306] page:000000003ea7b354 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf17 [ 31.884726] memcg:ffff88801000ea01 [ 31.885292] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.886141] page_type: 0xffffffff() [ 31.886724] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.887937] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801000ea01 [ 31.889146] page dumped because: kasan: bad access detected [ 31.890045] [ 31.890323] Memory state around the buggy address: [ 31.891096] ffff88800df17200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.892315] ffff88800df17280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.893435] >ffff88800df17300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.894581] ^ [ 31.895195] ffff88800df17380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.896335] ffff88800df17400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.897442] ================================================================== [ 31.898875] Disabling lock debugging due to kernel taint [ 34.546861] BUG: Bad rss-counter state mm:00000000a9f1c734 type:MM_FILEPAGES val:33 [ 34.548000] BUG: Bad rss-counter state mm:00000000a9f1c734 type:MM_ANONPAGES val:22 [ 35.041787] BUG: Bad rss-counter state mm:00000000eefae7ca type:MM_FILEPAGES val:33 [ 35.042794] BUG: Bad rss-counter state mm:00000000eefae7ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58775' (ECDSA) to the list of known hosts. 2023/06/19 13:05:50 fuzzer started 2023/06/19 13:05:50 dialing manager at localhost:44161 2023/06/19 13:05:50 checking machine... 2023/06/19 13:05:50 checking revisions... [ 35.776084] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:05:50 testing simple program... [ 35.835304] cgroup: Unknown subsys name 'net' [ 35.874141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:05:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000ffffffff RDI=000055e331ebc350 RBP=0000000000000000 RSP=00007ffc11c6f3f0 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000006 R12=0000000000000003 R13=000055e331ebc350 R14=0000000000000000 R15=0000000000000001 RIP=00007fb0f614e0ad RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb0f5628900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc11c69000 CR3=000000000c4c4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f2013c361a0 CR3=000000000d478000 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=83444c3cf6b08aac1746d305b0b13728 XMM02=000000000011eb68ec2efd57dc4c00df XMM03=000000000012373869582057bd1d0449 XMM04=041de81ebdd84d0000000000000ae988 XMM05=671a2c349c82d62a0000000000135460 XMM06=c291bd5c70af25b90000000000134500 XMM07=e042d86d42eb936e00000000001239b8 XMM08=69582057bd1d0449000000000011ebc8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000