syzkaller login: [ 30.608811] BUG: Bad rss-counter state mm:000000005727b6fd type:MM_FILEPAGES val:33 [ 30.610361] BUG: Bad rss-counter state mm:000000005727b6fd type:MM_ANONPAGES val:22 [ 30.786516] ================================================================== [ 30.787747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.789151] Read of size 8 at addr ffff888016e6f3f8 by task sshd/221 [ 30.790172] [ 30.790465] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.791644] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.792952] Call Trace: [ 30.793384] [ 30.793764] dump_stack_lvl+0x91/0xf0 [ 30.794406] print_report+0xcc/0x620 [ 30.795044] ? __virt_addr_valid+0x102/0x340 [ 30.795787] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796614] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.797466] kasan_report+0xbe/0xf0 [ 30.798013] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.798708] vma_interval_tree_remove+0xc75/0xec0 [ 30.799399] vma_prepare+0xc54/0x11a0 [ 30.799947] __split_vma+0x5af/0x950 [ 30.800474] ? __pfx___split_vma+0x10/0x10 [ 30.801076] ? find_held_lock+0x2c/0x110 [ 30.801668] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.802322] ? lock_is_held_type+0x9f/0x120 [ 30.802940] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.803647] ? mtree_range_walk+0x632/0x900 [ 30.804288] ? mas_walk+0x5c7/0x7c0 [ 30.804831] do_vmi_munmap+0x1f1/0x2b0 [ 30.805406] mmap_region+0x1f9/0x2660 [ 30.805960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.806551] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.807364] ? __pfx_lock_acquire+0x10/0x10 [ 30.807973] ? __pfx_mmap_region+0x10/0x10 [ 30.808586] ? security_mmap_addr+0x7d/0xa0 [ 30.809212] ? get_unmapped_area+0x1f5/0x3f0 [ 30.809840] do_mmap+0x854/0xf00 [ 30.810339] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.810910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.811554] ksys_mmap_pgoff+0x3af/0x500 [ 30.812123] do_syscall_64+0x3f/0x90 [ 30.812656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813377] RIP: 0033:0x7f9811714d82 [ 30.813892] 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 [ 30.816248] RSP: 002b:00007ffdec1cac28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.817276] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9811714d82 [ 30.818231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9810b4e000 [ 30.819208] RBP: 00007f9810b4e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.820148] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e21ef3ec0 [ 30.821100] R13: 00007ffdec1cac40 R14: 00007ffdec1cac70 R15: 00007ffdec1cafd0 [ 30.822086] [ 30.822413] [ 30.822664] Allocated by task 214: [ 30.823135] kasan_save_stack+0x22/0x50 [ 30.823692] kasan_set_track+0x25/0x30 [ 30.824242] __kasan_slab_alloc+0x59/0x70 [ 30.824823] kmem_cache_alloc+0x16b/0x370 [ 30.825417] vm_area_dup+0x20/0x160 [ 30.825929] __split_vma+0x170/0x950 [ 30.826438] split_vma+0xc6/0x110 [ 30.826917] mprotect_fixup+0x8d2/0xb30 [ 30.827496] do_mprotect_pkey+0x87e/0xd40 [ 30.828072] __x64_sys_mprotect+0x78/0xc0 [ 30.828647] do_syscall_64+0x3f/0x90 [ 30.829172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.829882] [ 30.830172] Freed by task 214: [ 30.830618] kasan_save_stack+0x22/0x50 [ 30.831191] kasan_set_track+0x25/0x30 [ 30.831749] kasan_save_free_info+0x2b/0x50 [ 30.832330] __kasan_slab_free+0x10a/0x190 [ 30.832920] kmem_cache_free+0x10d/0x4d0 [ 30.833494] rcu_core+0x8c8/0x2860 [ 30.833993] __do_softirq+0x1b7/0x7d4 [ 30.834519] [ 30.834758] Last potentially related work creation: [ 30.835401] kasan_save_stack+0x22/0x50 [ 30.835958] __kasan_record_aux_stack+0x8e/0xa0 [ 30.836600] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.837340] remove_vma+0x139/0x170 [ 30.837852] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.838507] do_vmi_munmap+0x1f1/0x2b0 [ 30.839044] __vm_munmap+0x138/0x3a0 [ 30.839565] __x64_sys_munmap+0x59/0x80 [ 30.840107] do_syscall_64+0x3f/0x90 [ 30.840622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.841339] [ 30.841573] The buggy address belongs to the object at ffff888016e6f3a0 [ 30.841573] which belongs to the cache vm_area_struct of size 168 [ 30.843162] The buggy address is located 88 bytes inside of [ 30.843162] freed 168-byte region [ffff888016e6f3a0, ffff888016e6f448) [ 30.844700] [ 30.844938] The buggy address belongs to the physical page: [ 30.845673] page:00000000b59701ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e6f [ 30.846847] memcg:ffff888019eb4601 [ 30.847305] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.848001] page_type: 0xffffffff() [ 30.848488] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.849532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019eb4601 [ 30.850525] page dumped because: kasan: bad access detected [ 30.851259] [ 30.851489] Memory state around the buggy address: [ 30.852136] ffff888016e6f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.853117] ffff888016e6f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.854060] >ffff888016e6f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.854991] ^ [ 30.855913] ffff888016e6f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.856848] ffff888016e6f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.857790] ================================================================== [ 30.858888] Disabling lock debugging due to kernel taint [ 32.928812] BUG: Bad rss-counter state mm:00000000162af778 type:MM_FILEPAGES val:33 [ 32.929931] BUG: Bad rss-counter state mm:00000000162af778 type:MM_ANONPAGES val:22 [ 33.388862] BUG: Bad rss-counter state mm:000000001546b1a5 type:MM_FILEPAGES val:33 [ 33.389937] BUG: Bad rss-counter state mm:000000001546b1a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44105' (ECDSA) to the list of known hosts. 2023/06/19 22:10:03 fuzzer started 2023/06/19 22:10:04 dialing manager at localhost:44161 2023/06/19 22:10:04 checking machine... 2023/06/19 22:10:04 checking revisions... [ 34.069887] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:10:04 testing simple program... [ 34.113622] cgroup: Unknown subsys name 'net' [ 34.157409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:10:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f6765f9a160 CR3=000000000ecc6000 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=2033303a30313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a30313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888018ba7900 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000d40 RIP=ffffffff814c01d0 RFL=00000246 [---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 00007f650b008900 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=00007ffd7e9bf000 CR3=000000000e2a8000 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=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