syzkaller login: [ 49.744587] BUG: Bad rss-counter state mm:0000000086b2d492 type:MM_FILEPAGES val:33 [ 49.745762] BUG: Bad rss-counter state mm:0000000086b2d492 type:MM_ANONPAGES val:22 [ 49.785859] ================================================================== [ 49.787087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.788342] Read of size 8 at addr ffff88801699ea50 by task sshd/219 [ 49.789299] [ 49.789570] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.790692] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.791995] Call Trace: [ 49.792425] [ 49.792752] dump_stack_lvl+0x91/0xf0 [ 49.793382] print_report+0xcc/0x620 [ 49.793962] ? __virt_addr_valid+0x102/0x340 [ 49.794643] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.795376] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.796189] kasan_report+0xbe/0xf0 [ 49.796718] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.797391] vma_interval_tree_remove+0xc75/0xec0 [ 49.798242] vma_prepare+0xc54/0x11a0 [ 49.798788] __split_vma+0x5af/0x950 [ 49.799465] ? __pfx___split_vma+0x10/0x10 [ 49.800158] ? find_held_lock+0x2c/0x110 [ 49.800769] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.801432] ? lock_is_held_type+0x9f/0x120 [ 49.802039] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.802892] ? mtree_range_walk+0x632/0x900 [ 49.803616] ? mas_walk+0x5c7/0x7c0 [ 49.804132] do_vmi_munmap+0x1f1/0x2b0 [ 49.804673] mmap_region+0x1f9/0x2660 [ 49.805196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.805759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.806542] ? __pfx_lock_acquire+0x10/0x10 [ 49.807166] ? __pfx_mmap_region+0x10/0x10 [ 49.807753] ? security_mmap_addr+0x7d/0xa0 [ 49.808337] ? get_unmapped_area+0x1f5/0x3f0 [ 49.808939] do_mmap+0x854/0xf00 [ 49.809425] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.809972] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.810590] ksys_mmap_pgoff+0x3af/0x500 [ 49.811184] do_syscall_64+0x3f/0x90 [ 49.811713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.812426] RIP: 0033:0x7f19d909ad82 [ 49.812929] 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 [ 49.815254] RSP: 002b:00007ffc3b411ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.816236] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19d909ad82 [ 49.817163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19d84d4000 [ 49.818077] RBP: 00007f19d84d4000 R08: 0000000000000009 R09: 0000000000001000 [ 49.819030] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559197eb2ec0 [ 49.819956] R13: 00007ffc3b411ad0 R14: 00007ffc3b411b00 R15: 00007ffc3b411e60 [ 49.820889] [ 49.821206] [ 49.821437] Allocated by task 212: [ 49.821900] kasan_save_stack+0x22/0x50 [ 49.822449] kasan_set_track+0x25/0x30 [ 49.823029] __kasan_slab_alloc+0x59/0x70 [ 49.823603] kmem_cache_alloc+0x16b/0x370 [ 49.824167] vm_area_dup+0x20/0x160 [ 49.824663] __split_vma+0x170/0x950 [ 49.825174] split_vma+0xc6/0x110 [ 49.825651] mprotect_fixup+0x8d2/0xb30 [ 49.826192] do_mprotect_pkey+0x87e/0xd40 [ 49.826757] __x64_sys_mprotect+0x78/0xc0 [ 49.827337] do_syscall_64+0x3f/0x90 [ 49.827851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.828554] [ 49.828789] Freed by task 212: [ 49.829216] kasan_save_stack+0x22/0x50 [ 49.829762] kasan_set_track+0x25/0x30 [ 49.830356] kasan_save_free_info+0x2b/0x50 [ 49.830973] __kasan_slab_free+0x10a/0x190 [ 49.831548] kmem_cache_free+0x10d/0x4d0 [ 49.832091] rcu_core+0x8c8/0x2860 [ 49.832567] __do_softirq+0x1b7/0x7d4 [ 49.833080] [ 49.833313] Last potentially related work creation: [ 49.833957] kasan_save_stack+0x22/0x50 [ 49.834511] __kasan_record_aux_stack+0x8e/0xa0 [ 49.835175] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.835886] remove_vma+0x139/0x170 [ 49.836387] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.837010] do_vmi_munmap+0x1f1/0x2b0 [ 49.837565] __vm_munmap+0x138/0x3a0 [ 49.838100] __x64_sys_munmap+0x59/0x80 [ 49.838664] do_syscall_64+0x3f/0x90 [ 49.839238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.839961] [ 49.840208] The buggy address belongs to the object at ffff88801699e9f8 [ 49.840208] which belongs to the cache vm_area_struct of size 168 [ 49.841857] The buggy address is located 88 bytes inside of [ 49.841857] freed 168-byte region [ffff88801699e9f8, ffff88801699eaa0) [ 49.843477] [ 49.843727] The buggy address belongs to the physical page: [ 49.844463] page:000000008cf99666 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1699e [ 49.845694] memcg:ffff88800d7bfc01 [ 49.846174] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.846936] page_type: 0xffffffff() [ 49.847444] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.848480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7bfc01 [ 49.849496] page dumped because: kasan: bad access detected [ 49.850235] [ 49.850479] Memory state around the buggy address: [ 49.851169] ffff88801699e900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.852132] ffff88801699e980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 49.853086] >ffff88801699ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.854050] ^ [ 49.854856] ffff88801699ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 49.855821] ffff88801699eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.856776] ================================================================== [ 49.857869] Disabling lock debugging due to kernel taint [ 52.597598] BUG: Bad rss-counter state mm:0000000010d77ff3 type:MM_FILEPAGES val:33 [ 52.598650] BUG: Bad rss-counter state mm:0000000010d77ff3 type:MM_ANONPAGES val:22 [ 53.074731] BUG: Bad rss-counter state mm:00000000338750ae type:MM_FILEPAGES val:33 [ 53.076000] BUG: Bad rss-counter state mm:00000000338750ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16896' (ECDSA) to the list of known hosts. 2023/06/20 00:30:21 fuzzer started 2023/06/20 00:30:21 dialing manager at localhost:44161 2023/06/20 00:30:21 checking machine... 2023/06/20 00:30:21 checking revisions... [ 53.826909] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:30:22 testing simple program... [ 53.870846] cgroup: Unknown subsys name 'net' [ 53.924289] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:30:02 Registers: info registers vcpu 0 RAX=ffffed1001b46f69 RBX=0000000000092cc0 RCX=ffffffff812d869a RDX=0000000000000000 RSI=ffffffff81807d9f RDI=ffffffff856c1d40 RBP=1ffff11001b46f69 RSP=ffff88800da37b38 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856c1d40 R13=ffffffff81807d9f R14=0000000000000cc0 R15=ffffffff818470dc RIP=ffffffff812d8652 RFL=00000286 [--S--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 00007f05a46ee900 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=00007f05a4ca60b0 CR3=0000000018ca0000 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=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 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=ffff888008c58400 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=00007f6b191a3340 CR3=000000000ca7a000 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=e6156315d21e738dfe49fe2addf08871 XMM02=000000000011cf50eff9b2d0a8fce9cb XMM03=000000000011d0202c67c8bc2e329bc3 XMM04=048a09cd3d64626600000000000ae988 XMM05=dfcdbad4f1609c370000000000134068 XMM06=806171799158d9670000000000133ef0 XMM07=e042d86d42eb936e00000000001246e0 XMM08=2e72e616fad5462b000000000011d020 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000