syzkaller login: [ 30.324204] BUG: Bad rss-counter state mm:00000000c0222fcd type:MM_FILEPAGES val:33 [ 30.324972] BUG: Bad rss-counter state mm:00000000c0222fcd type:MM_ANONPAGES val:22 [ 30.486154] ================================================================== [ 30.487188] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.488279] Read of size 8 at addr ffff8880142d24e0 by task sshd/219 [ 30.489251] [ 30.489479] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.490343] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.491345] Call Trace: [ 30.491666] [ 30.492017] dump_stack_lvl+0x91/0xf0 [ 30.492519] print_report+0xcc/0x620 [ 30.493001] ? __virt_addr_valid+0x102/0x340 [ 30.493548] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.494176] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.494795] kasan_report+0xbe/0xf0 [ 30.495278] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.495894] vma_interval_tree_remove+0xc75/0xec0 [ 30.496515] vma_prepare+0xc54/0x11a0 [ 30.496995] __split_vma+0x5af/0x950 [ 30.497469] ? __pfx___split_vma+0x10/0x10 [ 30.497998] ? find_held_lock+0x2c/0x110 [ 30.498521] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.499084] ? lock_is_held_type+0x9f/0x120 [ 30.499622] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.500232] ? mtree_range_walk+0x632/0x900 [ 30.500786] ? mas_walk+0x5c7/0x7c0 [ 30.501270] do_vmi_munmap+0x1f1/0x2b0 [ 30.501768] mmap_region+0x1f9/0x2660 [ 30.502251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.502765] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.503479] ? __pfx_lock_acquire+0x10/0x10 [ 30.504031] ? __pfx_mmap_region+0x10/0x10 [ 30.504561] ? security_mmap_addr+0x7d/0xa0 [ 30.505096] ? get_unmapped_area+0x1f5/0x3f0 [ 30.505646] do_mmap+0x854/0xf00 [ 30.506083] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.506584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.507152] ksys_mmap_pgoff+0x3af/0x500 [ 30.507659] do_syscall_64+0x3f/0x90 [ 30.508152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.508800] RIP: 0033:0x7f9c05a79d82 [ 30.509259] 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 [ 30.511363] RSP: 002b:00007ffecd0acf98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.512317] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c05a79d82 [ 30.513179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c04eb3000 [ 30.514036] RBP: 00007f9c04eb3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.514881] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fed8b4ec0 [ 30.515733] R13: 00007ffecd0acfb0 R14: 00007ffecd0acfe0 R15: 00007ffecd0ad340 [ 30.516601] [ 30.516899] [ 30.517112] Allocated by task 212: [ 30.517546] kasan_save_stack+0x22/0x50 [ 30.518057] kasan_set_track+0x25/0x30 [ 30.518545] __kasan_slab_alloc+0x59/0x70 [ 30.519078] kmem_cache_alloc+0x16b/0x370 [ 30.519598] vm_area_dup+0x20/0x160 [ 30.520068] __split_vma+0x170/0x950 [ 30.520555] split_vma+0xc6/0x110 [ 30.521020] mprotect_fixup+0x8d2/0xb30 [ 30.521548] do_mprotect_pkey+0x87e/0xd40 [ 30.522094] __x64_sys_mprotect+0x78/0xc0 [ 30.522640] do_syscall_64+0x3f/0x90 [ 30.523149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.523831] [ 30.524066] Freed by task 202: [ 30.524482] kasan_save_stack+0x22/0x50 [ 30.525015] kasan_set_track+0x25/0x30 [ 30.525537] kasan_save_free_info+0x2b/0x50 [ 30.526100] __kasan_slab_free+0x10a/0x190 [ 30.526665] kmem_cache_free+0x10d/0x4d0 [ 30.527189] rcu_core+0x8c8/0x2860 [ 30.527655] __do_softirq+0x1b7/0x7d4 [ 30.528173] [ 30.528400] Last potentially related work creation: [ 30.529027] kasan_save_stack+0x22/0x50 [ 30.529553] __kasan_record_aux_stack+0x8e/0xa0 [ 30.530208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.530890] remove_vma+0x139/0x170 [ 30.531361] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.531945] do_vmi_munmap+0x1f1/0x2b0 [ 30.532459] __vm_munmap+0x138/0x3a0 [ 30.532953] __x64_sys_munmap+0x59/0x80 [ 30.533476] do_syscall_64+0x3f/0x90 [ 30.533979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.534652] [ 30.534875] The buggy address belongs to the object at ffff8880142d2488 [ 30.534875] which belongs to the cache vm_area_struct of size 168 [ 30.536438] The buggy address is located 88 bytes inside of [ 30.536438] freed 168-byte region [ffff8880142d2488, ffff8880142d2530) [ 30.537873] [ 30.538088] The buggy address belongs to the physical page: [ 30.538743] page:000000003f1e6ae7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x142d2 [ 30.539832] memcg:ffff888018c4eb01 [ 30.540265] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.540912] page_type: 0xffffffff() [ 30.541363] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.542283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c4eb01 [ 30.543194] page dumped because: kasan: bad access detected [ 30.543851] [ 30.544077] Memory state around the buggy address: [ 30.544663] ffff8880142d2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.545524] ffff8880142d2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.546376] >ffff8880142d2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.547229] ^ [ 30.548008] ffff8880142d2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.548869] ffff8880142d2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.549733] ================================================================== [ 30.550745] Disabling lock debugging due to kernel taint [ 32.784287] BUG: Bad rss-counter state mm:00000000548da2ff type:MM_FILEPAGES val:33 [ 32.785277] BUG: Bad rss-counter state mm:00000000548da2ff type:MM_ANONPAGES val:22 [ 33.269569] BUG: Bad rss-counter state mm:00000000867de267 type:MM_FILEPAGES val:33 [ 33.270552] BUG: Bad rss-counter state mm:00000000867de267 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4543' (ECDSA) to the list of known hosts. 2023/06/20 20:30:12 fuzzer started 2023/06/20 20:30:13 dialing manager at localhost:36067 2023/06/20 20:30:13 checking machine... 2023/06/20 20:30:13 checking revisions... [ 33.811010] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:30:13 testing simple program... [ 33.842161] cgroup: Unknown subsys name 'net' [ 33.899287] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:30:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fb198d2aae0 CR3=000000000e29a000 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=2032313a30333a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a30333a3032203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007f6733525618 CR3=000000000e29a000 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=30333a3032203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323632 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000