syzkaller login: [ 63.898832] BUG: Bad rss-counter state mm:00000000017e3a9f type:MM_FILEPAGES val:33 [ 63.900168] BUG: Bad rss-counter state mm:00000000017e3a9f type:MM_ANONPAGES val:22 [ 64.038755] ================================================================== [ 64.039792] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.040881] Read of size 8 at addr ffff88800c9eb5c8 by task sshd/219 [ 64.041866] [ 64.042084] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.042918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.043875] Call Trace: [ 64.044189] [ 64.044467] dump_stack_lvl+0x91/0xf0 [ 64.044959] print_report+0xcc/0x620 [ 64.045432] ? __virt_addr_valid+0x102/0x340 [ 64.045968] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.046561] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.047159] kasan_report+0xbe/0xf0 [ 64.047634] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.048254] vma_interval_tree_remove+0xc75/0xec0 [ 64.048845] vma_prepare+0xc54/0x11a0 [ 64.049307] __split_vma+0x5af/0x950 [ 64.049767] ? __pfx___split_vma+0x10/0x10 [ 64.050281] ? find_held_lock+0x2c/0x110 [ 64.050791] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.051345] ? lock_is_held_type+0x9f/0x120 [ 64.051873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.052466] ? mtree_range_walk+0x632/0x900 [ 64.053020] ? mas_walk+0x5c7/0x7c0 [ 64.053479] do_vmi_munmap+0x1f1/0x2b0 [ 64.053970] mmap_region+0x1f9/0x2660 [ 64.054435] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.054932] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.055619] ? __pfx_lock_acquire+0x10/0x10 [ 64.056136] ? __pfx_mmap_region+0x10/0x10 [ 64.056666] ? security_mmap_addr+0x7d/0xa0 [ 64.057182] ? get_unmapped_area+0x1f5/0x3f0 [ 64.057714] do_mmap+0x854/0xf00 [ 64.058144] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.058628] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.059170] ksys_mmap_pgoff+0x3af/0x500 [ 64.059660] do_syscall_64+0x3f/0x90 [ 64.060124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.060760] RIP: 0033:0x7fd3eaddcd82 [ 64.061204] 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 [ 64.063252] RSP: 002b:00007ffecadb0628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.064127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3eaddcd82 [ 64.064971] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3ea216000 [ 64.065797] RBP: 00007fd3ea216000 R08: 0000000000000009 R09: 0000000000001000 [ 64.066612] R10: 0000000000000812 R11: 0000000000000206 R12: 000056246d690f70 [ 64.067434] R13: 00007ffecadb0640 R14: 00007ffecadb0670 R15: 00007ffecadb09d0 [ 64.068262] [ 64.068552] [ 64.068764] Allocated by task 212: [ 64.069177] kasan_save_stack+0x22/0x50 [ 64.069667] kasan_set_track+0x25/0x30 [ 64.070146] __kasan_slab_alloc+0x59/0x70 [ 64.070652] kmem_cache_alloc+0x16b/0x370 [ 64.071149] vm_area_dup+0x20/0x160 [ 64.071588] __split_vma+0x170/0x950 [ 64.072040] split_vma+0xc6/0x110 [ 64.072468] mprotect_fixup+0x8d2/0xb30 [ 64.072978] do_mprotect_pkey+0x87e/0xd40 [ 64.073484] __x64_sys_mprotect+0x78/0xc0 [ 64.073988] do_syscall_64+0x3f/0x90 [ 64.074450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.075071] [ 64.075280] Freed by task 212: [ 64.075660] kasan_save_stack+0x22/0x50 [ 64.076150] kasan_set_track+0x25/0x30 [ 64.076636] kasan_save_free_info+0x2b/0x50 [ 64.077152] __kasan_slab_free+0x10a/0x190 [ 64.077673] kmem_cache_free+0x10d/0x4d0 [ 64.078166] rcu_core+0x8c8/0x2860 [ 64.078599] __do_softirq+0x1b7/0x7d4 [ 64.079060] [ 64.079269] Last potentially related work creation: [ 64.079839] kasan_save_stack+0x22/0x50 [ 64.080329] __kasan_record_aux_stack+0x8e/0xa0 [ 64.080893] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.081518] remove_vma+0x139/0x170 [ 64.082004] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.082545] do_vmi_munmap+0x1f1/0x2b0 [ 64.083018] __vm_munmap+0x138/0x3a0 [ 64.083475] __x64_sys_munmap+0x59/0x80 [ 64.083956] do_syscall_64+0x3f/0x90 [ 64.084419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.085046] [ 64.085257] The buggy address belongs to the object at ffff88800c9eb570 [ 64.085257] which belongs to the cache vm_area_struct of size 168 [ 64.086675] The buggy address is located 88 bytes inside of [ 64.086675] freed 168-byte region [ffff88800c9eb570, ffff88800c9eb618) [ 64.088026] [ 64.088235] The buggy address belongs to the physical page: [ 64.088876] page:0000000051346736 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9eb [ 64.089926] memcg:ffff88800fc08001 [ 64.090340] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.090970] page_type: 0xffffffff() [ 64.091408] raw: 0100000000000200 ffff88800879fc80 ffffea0000653440 dead000000000002 [ 64.092296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc08001 [ 64.093189] page dumped because: kasan: bad access detected [ 64.093829] [ 64.094037] Memory state around the buggy address: [ 64.094597] ffff88800c9eb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.095423] ffff88800c9eb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 64.096246] >ffff88800c9eb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.097071] ^ [ 64.097716] ffff88800c9eb600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 64.098543] ffff88800c9eb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.099367] ================================================================== [ 64.100253] Disabling lock debugging due to kernel taint [ 66.261788] BUG: Bad rss-counter state mm:00000000b568dc98 type:MM_FILEPAGES val:33 [ 66.263093] BUG: Bad rss-counter state mm:00000000b568dc98 type:MM_ANONPAGES val:22 [ 66.781229] BUG: Bad rss-counter state mm:00000000d9ded732 type:MM_FILEPAGES val:33 [ 66.782451] BUG: Bad rss-counter state mm:00000000d9ded732 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28919' (ECDSA) to the list of known hosts. 2023/06/20 00:14:59 fuzzer started 2023/06/20 00:14:59 dialing manager at localhost:44161 2023/06/20 00:14:59 checking machine... 2023/06/20 00:14:59 checking revisions... [ 67.409356] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:14:59 testing simple program... [ 67.462412] cgroup: Unknown subsys name 'net' [ 67.526364] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:14:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff813ad6cf RDX=0000000000003ad7 RSI=0000000000003ad6 RDI=ffffffff864f671c RBP=ffff88800d847a30 RSP=ffff88800d847968 R8 =0000000000000000 R9 =ffff88800d847a18 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800d847a38 R13=ffff88800d847a20 R14=ffff88800d847a19 R15=ffff88800d8479d8 RIP=ffffffff811307e3 RFL=00000213 [----A-C] 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 00007f5fb6abb900 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=00007f5fb5fcb030 CR3=000000000d59e000 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=000000000010c9a02fccd54c36d8a3f3 XMM01=e013fe106aa099b8a341ba9297dc051c XMM02=000000000011c6d0eff9b2d0a8fce9cb XMM03=000000000011c7a02c67c8bc2e329bc3 XMM04=72d1d15106aff72900000000000ae988 XMM05=eb701ffc9c97704b0000000000134290 XMM06=806171799158d9670000000000132fc0 XMM07=e042d86d42eb936e00000000001238a8 XMM08=940607017a3d059a000000000011c7a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008e579f8 RCX=0000000000000001 RDX=1ffff110011caf41 RSI=ffffffff8118d7d9 RDI=ffff888008e57a08 RBP=ffff888008e579c8 RSP=ffff888008e57910 R8 =0000000000000001 R9 =ffff888008e57970 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008e579f8 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800eb28600 RIP=ffffffff813ad446 RFL=00000282 [--S----] 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 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=00007f5a729fe968 CR3=000000000e684000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000