syzkaller login: [ 30.595400] BUG: Bad rss-counter state mm:0000000060d147f9 type:MM_FILEPAGES val:33 [ 30.596464] BUG: Bad rss-counter state mm:0000000060d147f9 type:MM_ANONPAGES val:22 [ 30.761732] ================================================================== [ 30.762647] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.763583] Read of size 8 at addr ffff8880186e3228 by task sshd/221 [ 30.764349] [ 30.764572] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.765534] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.766490] Call Trace: [ 30.766809] [ 30.767112] dump_stack_lvl+0x91/0xf0 [ 30.767606] print_report+0xcc/0x620 [ 30.768086] ? __virt_addr_valid+0x102/0x340 [ 30.768654] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.769273] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.769884] kasan_report+0xbe/0xf0 [ 30.770354] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770969] vma_interval_tree_remove+0xc75/0xec0 [ 30.771574] vma_prepare+0xc54/0x11a0 [ 30.772049] __split_vma+0x5af/0x950 [ 30.772526] ? __pfx___split_vma+0x10/0x10 [ 30.773051] ? find_held_lock+0x2c/0x110 [ 30.773564] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.774121] ? lock_is_held_type+0x9f/0x120 [ 30.774658] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.775254] ? mtree_range_walk+0x632/0x900 [ 30.775802] ? mas_walk+0x5c7/0x7c0 [ 30.776273] do_vmi_munmap+0x1f1/0x2b0 [ 30.776788] mmap_region+0x1f9/0x2660 [ 30.777268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.777785] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.778514] ? __pfx_lock_acquire+0x10/0x10 [ 30.779046] ? __pfx_mmap_region+0x10/0x10 [ 30.779570] ? security_mmap_addr+0x7d/0xa0 [ 30.780099] ? get_unmapped_area+0x1f5/0x3f0 [ 30.780661] do_mmap+0x854/0xf00 [ 30.781098] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.781590] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.782146] ksys_mmap_pgoff+0x3af/0x500 [ 30.782649] do_syscall_64+0x3f/0x90 [ 30.783129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783799] RIP: 0033:0x7fc610e6dd82 [ 30.784252] 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 [ 30.786395] RSP: 002b:00007fff836c07c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.787296] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc610e6dd82 [ 30.788141] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6102a7000 [ 30.789011] RBP: 00007fc6102a7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.789857] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560203b4d90 [ 30.790699] R13: 00007fff836c07e0 R14: 00007fff836c0810 R15: 00007fff836c0b70 [ 30.791543] [ 30.791831] [ 30.792045] Allocated by task 214: [ 30.792479] kasan_save_stack+0x22/0x50 [ 30.792987] kasan_set_track+0x25/0x30 [ 30.793478] __kasan_slab_alloc+0x59/0x70 [ 30.793991] kmem_cache_alloc+0x16b/0x370 [ 30.794512] vm_area_dup+0x20/0x160 [ 30.794974] __split_vma+0x170/0x950 [ 30.795444] split_vma+0xc6/0x110 [ 30.795880] mprotect_fixup+0x8d2/0xb30 [ 30.796382] do_mprotect_pkey+0x87e/0xd40 [ 30.796915] __x64_sys_mprotect+0x78/0xc0 [ 30.797444] do_syscall_64+0x3f/0x90 [ 30.797929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798566] [ 30.798778] Freed by task 214: [ 30.799165] kasan_save_stack+0x22/0x50 [ 30.799673] kasan_set_track+0x25/0x30 [ 30.800163] kasan_save_free_info+0x2b/0x50 [ 30.800708] __kasan_slab_free+0x10a/0x190 [ 30.801236] kmem_cache_free+0x10d/0x4d0 [ 30.801735] rcu_core+0x8c8/0x2860 [ 30.802174] __do_softirq+0x1b7/0x7d4 [ 30.802660] [ 30.802880] Last potentially related work creation: [ 30.803453] kasan_save_stack+0x22/0x50 [ 30.803949] __kasan_record_aux_stack+0x8e/0xa0 [ 30.804522] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.805169] remove_vma+0x139/0x170 [ 30.805622] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.806175] do_vmi_munmap+0x1f1/0x2b0 [ 30.806663] __vm_munmap+0x138/0x3a0 [ 30.807127] __x64_sys_munmap+0x59/0x80 [ 30.807631] do_syscall_64+0x3f/0x90 [ 30.808110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808770] [ 30.808983] The buggy address belongs to the object at ffff8880186e31d0 [ 30.808983] which belongs to the cache vm_area_struct of size 168 [ 30.810442] The buggy address is located 88 bytes inside of [ 30.810442] freed 168-byte region [ffff8880186e31d0, ffff8880186e3278) [ 30.811835] [ 30.812051] The buggy address belongs to the physical page: [ 30.812704] page:00000000999cca18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x186e3 [ 30.813788] memcg:ffff8880186de201 [ 30.814212] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.814851] page_type: 0xffffffff() [ 30.815296] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.816223] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880186de201 [ 30.817117] page dumped because: kasan: bad access detected [ 30.817782] [ 30.817999] Memory state around the buggy address: [ 30.818611] ffff8880186e3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.819635] ffff8880186e3180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.820625] >ffff8880186e3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.821515] ^ [ 30.822151] ffff8880186e3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.823141] ffff8880186e3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.824024] ================================================================== [ 30.825101] Disabling lock debugging due to kernel taint [ 32.828638] BUG: Bad rss-counter state mm:00000000fdaddfd0 type:MM_FILEPAGES val:33 [ 32.829894] BUG: Bad rss-counter state mm:00000000fdaddfd0 type:MM_ANONPAGES val:22 [ 33.230785] BUG: Bad rss-counter state mm:000000007b100f33 type:MM_FILEPAGES val:33 [ 33.231983] BUG: Bad rss-counter state mm:000000007b100f33 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59691' (ECDSA) to the list of known hosts. 2023/06/21 02:10:44 fuzzer started 2023/06/21 02:10:45 dialing manager at localhost:36067 2023/06/21 02:10:45 checking machine... 2023/06/21 02:10:45 checking revisions... [ 33.921787] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:10:45 testing simple program... [ 33.973357] cgroup: Unknown subsys name 'net' [ 34.019031] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:10:44 Registers: info registers vcpu 0 RAX=1ffffffff0c0accb RBX=ffffffff8605665c RCX=ffffffff86607972 RDX=0000000000000000 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff86056648 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff86056670 R13=ffffffff85d7a9c4 R14=ffffffff86056644 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 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=00007ffea86127d8 CR3=000000000e9d0000 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=2034343a30313a3230203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a30313a3230203132 XMM08=732f646d65747379732f62696c2f223d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001bc9743 RBX=ffff88800de4b9e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800de4ba18 RBP=ffff88800fbdfaf8 RSP=ffff888008e37c68 R8 =0000000000000001 R9 =ffffed10011c6f81 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800fc672c0 R14=ffffffff81165022 R15=ffff8880184f8680 RIP=ffffffff818464ec RFL=00000046 [---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 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=00007f5456d500b0 CR3=000000001ce04000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000