syzkaller login: [ 39.120102] BUG: Bad rss-counter state mm:00000000d48301f0 type:MM_FILEPAGES val:33 [ 39.121118] BUG: Bad rss-counter state mm:00000000d48301f0 type:MM_ANONPAGES val:22 [ 39.287215] ================================================================== [ 39.288347] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.289473] Read of size 8 at addr ffff88800fb9f798 by task sshd/219 [ 39.290247] [ 39.290491] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.291378] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.292387] Call Trace: [ 39.292730] [ 39.293011] dump_stack_lvl+0x91/0xf0 [ 39.293522] print_report+0xcc/0x620 [ 39.294004] ? __virt_addr_valid+0x102/0x340 [ 39.294574] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.295196] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.295833] kasan_report+0xbe/0xf0 [ 39.296310] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.296978] vma_interval_tree_remove+0xc75/0xec0 [ 39.297595] vma_prepare+0xc54/0x11a0 [ 39.298077] __split_vma+0x5af/0x950 [ 39.298563] ? __pfx___split_vma+0x10/0x10 [ 39.299097] ? find_held_lock+0x2c/0x110 [ 39.299642] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.300213] ? lock_is_held_type+0x9f/0x120 [ 39.300810] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.301433] ? mtree_range_walk+0x632/0x900 [ 39.301988] ? mas_walk+0x5c7/0x7c0 [ 39.302480] do_vmi_munmap+0x1f1/0x2b0 [ 39.302978] mmap_region+0x1f9/0x2660 [ 39.303476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.303996] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.304759] ? __pfx_lock_acquire+0x10/0x10 [ 39.305295] ? __pfx_mmap_region+0x10/0x10 [ 39.305845] ? security_mmap_addr+0x7d/0xa0 [ 39.306401] ? get_unmapped_area+0x1f5/0x3f0 [ 39.306971] do_mmap+0x854/0xf00 [ 39.307431] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.307930] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.308547] ksys_mmap_pgoff+0x3af/0x500 [ 39.309058] do_syscall_64+0x3f/0x90 [ 39.309563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.310216] RIP: 0033:0x7f19335a5d82 [ 39.310690] 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 [ 39.312860] RSP: 002b:00007ffcc25432d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.313787] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19335a5d82 [ 39.314657] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19329df000 [ 39.315536] RBP: 00007f19329df000 R08: 0000000000000009 R09: 0000000000001000 [ 39.316410] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e0b22ef70 [ 39.317277] R13: 00007ffcc25432f0 R14: 00007ffcc2543320 R15: 00007ffcc2543680 [ 39.318150] [ 39.318461] [ 39.318677] Allocated by task 212: [ 39.319106] kasan_save_stack+0x22/0x50 [ 39.319626] kasan_set_track+0x25/0x30 [ 39.320123] __kasan_slab_alloc+0x59/0x70 [ 39.320698] kmem_cache_alloc+0x16b/0x370 [ 39.321228] vm_area_dup+0x20/0x160 [ 39.321699] __split_vma+0x170/0x950 [ 39.322167] split_vma+0xc6/0x110 [ 39.322619] mprotect_fixup+0x8d2/0xb30 [ 39.323127] do_mprotect_pkey+0x87e/0xd40 [ 39.323673] __x64_sys_mprotect+0x78/0xc0 [ 39.324200] do_syscall_64+0x3f/0x90 [ 39.324709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.325363] [ 39.325603] Freed by task 212: [ 39.325999] kasan_save_stack+0x22/0x50 [ 39.326517] kasan_set_track+0x25/0x30 [ 39.327014] kasan_save_free_info+0x2b/0x50 [ 39.327558] __kasan_slab_free+0x10a/0x190 [ 39.328093] kmem_cache_free+0x10d/0x4d0 [ 39.328644] rcu_core+0x8c8/0x2860 [ 39.329094] __do_softirq+0x1b7/0x7d4 [ 39.329600] [ 39.329816] Last potentially related work creation: [ 39.330420] kasan_save_stack+0x22/0x50 [ 39.330939] __kasan_record_aux_stack+0x8e/0xa0 [ 39.331529] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.332174] remove_vma+0x139/0x170 [ 39.332656] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.333217] do_vmi_munmap+0x1f1/0x2b0 [ 39.333716] __vm_munmap+0x138/0x3a0 [ 39.334199] __x64_sys_munmap+0x59/0x80 [ 39.334711] do_syscall_64+0x3f/0x90 [ 39.335188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.335857] [ 39.336075] The buggy address belongs to the object at ffff88800fb9f740 [ 39.336075] which belongs to the cache vm_area_struct of size 168 [ 39.337596] The buggy address is located 88 bytes inside of [ 39.337596] freed 168-byte region [ffff88800fb9f740, ffff88800fb9f7e8) [ 39.339029] [ 39.339249] The buggy address belongs to the physical page: [ 39.339917] page:00000000d2414da8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb9f [ 39.341048] memcg:ffff888018eb8b01 [ 39.341499] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.342147] page_type: 0xffffffff() [ 39.342610] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ae740 dead000000000002 [ 39.343548] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018eb8b01 [ 39.344499] page dumped because: kasan: bad access detected [ 39.345162] [ 39.345387] Memory state around the buggy address: [ 39.345980] ffff88800fb9f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.346854] ffff88800fb9f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.347726] >ffff88800fb9f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.348615] ^ [ 39.349109] ffff88800fb9f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.349998] ffff88800fb9f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.350866] ================================================================== [ 39.351843] Disabling lock debugging due to kernel taint [ 42.105811] BUG: Bad rss-counter state mm:00000000438f9c03 type:MM_FILEPAGES val:33 [ 42.106549] BUG: Bad rss-counter state mm:00000000438f9c03 type:MM_ANONPAGES val:22 [ 42.504903] BUG: Bad rss-counter state mm:00000000735e952d type:MM_FILEPAGES val:33 [ 42.506055] BUG: Bad rss-counter state mm:00000000735e952d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9585' (ECDSA) to the list of known hosts. 2023/06/21 01:44:10 fuzzer started 2023/06/21 01:44:10 dialing manager at localhost:36067 2023/06/21 01:44:10 checking machine... 2023/06/21 01:44:10 checking revisions... [ 43.238125] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:44:11 testing simple program... [ 43.287413] cgroup: Unknown subsys name 'net' [ 43.342186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:44:10 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff8880096682e0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000078 RDI=ffff8880096682e0 RBP=ffff888019bffda0 RSP=ffff888019bffd70 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6d7d R12=ffff8880087b2500 R13=ffffea0000259a00 R14=ffffffff813782f8 R15=ffff8880096682e0 RIP=ffffffff81809a9e 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4af7010900 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=00007f4af6fc401c CR3=0000000015f68000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe685d04a8 CR3=0000000005482000 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=00007f76adff4510000055e2a8903790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000