syzkaller login: [ 35.188877] BUG: Bad rss-counter state mm:000000005612370c type:MM_FILEPAGES val:33 [ 35.189865] BUG: Bad rss-counter state mm:000000005612370c type:MM_ANONPAGES val:22 [ 35.357449] ================================================================== [ 35.358358] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.359297] Read of size 8 at addr ffff88800e7eed08 by task sshd/219 [ 35.360058] [ 35.360274] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.361260] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.362231] Call Trace: [ 35.362554] [ 35.362834] dump_stack_lvl+0x91/0xf0 [ 35.363335] print_report+0xcc/0x620 [ 35.363817] ? __virt_addr_valid+0x102/0x340 [ 35.364376] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.365000] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.365619] kasan_report+0xbe/0xf0 [ 35.366098] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.366711] vma_interval_tree_remove+0xc75/0xec0 [ 35.367306] vma_prepare+0xc54/0x11a0 [ 35.367780] __split_vma+0x5af/0x950 [ 35.368246] ? __pfx___split_vma+0x10/0x10 [ 35.368774] ? find_held_lock+0x2c/0x110 [ 35.369312] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.369872] ? lock_is_held_type+0x9f/0x120 [ 35.370405] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.371005] ? mtree_range_walk+0x632/0x900 [ 35.371553] ? mas_walk+0x5c7/0x7c0 [ 35.372045] do_vmi_munmap+0x1f1/0x2b0 [ 35.372531] mmap_region+0x1f9/0x2660 [ 35.373010] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.373535] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.374244] ? __pfx_lock_acquire+0x10/0x10 [ 35.374771] ? __pfx_mmap_region+0x10/0x10 [ 35.375296] ? security_mmap_addr+0x7d/0xa0 [ 35.375824] ? get_unmapped_area+0x1f5/0x3f0 [ 35.376369] do_mmap+0x854/0xf00 [ 35.376807] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.377311] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.377867] ksys_mmap_pgoff+0x3af/0x500 [ 35.378371] do_syscall_64+0x3f/0x90 [ 35.378852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.379497] RIP: 0033:0x7f986a407d82 [ 35.379948] 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 [ 35.382075] RSP: 002b:00007ffd766d4008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.382979] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f986a407d82 [ 35.383862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9869841000 [ 35.384704] RBP: 00007f9869841000 R08: 0000000000000009 R09: 0000000000001000 [ 35.385615] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591ddc8eb20 [ 35.386475] R13: 00007ffd766d4020 R14: 00007ffd766d4050 R15: 00007ffd766d43b0 [ 35.387334] [ 35.387630] [ 35.387847] Allocated by task 212: [ 35.388274] kasan_save_stack+0x22/0x50 [ 35.388774] kasan_set_track+0x25/0x30 [ 35.389273] __kasan_slab_alloc+0x59/0x70 [ 35.389792] kmem_cache_alloc+0x16b/0x370 [ 35.390310] vm_area_dup+0x20/0x160 [ 35.390763] __split_vma+0x170/0x950 [ 35.391227] split_vma+0xc6/0x110 [ 35.391669] mprotect_fixup+0x8d2/0xb30 [ 35.392168] do_mprotect_pkey+0x87e/0xd40 [ 35.392688] __x64_sys_mprotect+0x78/0xc0 [ 35.393221] do_syscall_64+0x3f/0x90 [ 35.393694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.394335] [ 35.394549] Freed by task 203: [ 35.394941] kasan_save_stack+0x22/0x50 [ 35.395448] kasan_set_track+0x25/0x30 [ 35.395934] kasan_save_free_info+0x2b/0x50 [ 35.396467] __kasan_slab_free+0x10a/0x190 [ 35.396997] kmem_cache_free+0x10d/0x4d0 [ 35.397513] rcu_core+0x8c8/0x2860 [ 35.397957] __do_softirq+0x1b7/0x7d4 [ 35.398445] [ 35.398661] Last potentially related work creation: [ 35.399243] kasan_save_stack+0x22/0x50 [ 35.399745] __kasan_record_aux_stack+0x8e/0xa0 [ 35.400314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.400952] remove_vma+0x139/0x170 [ 35.401411] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.401980] do_vmi_munmap+0x1f1/0x2b0 [ 35.402463] __vm_munmap+0x138/0x3a0 [ 35.402926] __x64_sys_munmap+0x59/0x80 [ 35.403428] do_syscall_64+0x3f/0x90 [ 35.403905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.404542] [ 35.404755] Second to last potentially related work creation: [ 35.405449] kasan_save_stack+0x22/0x50 [ 35.405952] __kasan_record_aux_stack+0x8e/0xa0 [ 35.406525] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.407170] remove_vma+0x139/0x170 [ 35.407624] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.408180] do_vmi_munmap+0x1f1/0x2b0 [ 35.408666] mmap_region+0x1f9/0x2660 [ 35.409147] do_mmap+0x854/0xf00 [ 35.409590] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.410076] ksys_mmap_pgoff+0x3af/0x500 [ 35.410575] do_syscall_64+0x3f/0x90 [ 35.411045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.411687] [ 35.411904] The buggy address belongs to the object at ffff88800e7eecb0 [ 35.411904] which belongs to the cache vm_area_struct of size 168 [ 35.413380] The buggy address is located 88 bytes inside of [ 35.413380] freed 168-byte region [ffff88800e7eecb0, ffff88800e7eed58) [ 35.414800] [ 35.415015] The buggy address belongs to the physical page: [ 35.415689] page:0000000057cfcd39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7ee [ 35.416770] memcg:ffff88800e8ef501 [ 35.417200] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.417903] page_type: 0xffffffff() [ 35.418357] raw: 0100000000000200 ffff8880087a0c80 ffffea0000379240 dead000000000003 [ 35.419279] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8ef501 [ 35.420186] page dumped because: kasan: bad access detected [ 35.420851] [ 35.421064] Memory state around the buggy address: [ 35.421665] ffff88800e7eec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.422522] ffff88800e7eec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.423376] >ffff88800e7eed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.424230] ^ [ 35.424666] ffff88800e7eed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.425532] ffff88800e7eee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.426387] ================================================================== [ 35.427351] Disabling lock debugging due to kernel taint [ 37.197159] BUG: Bad rss-counter state mm:00000000224239e8 type:MM_FILEPAGES val:33 [ 37.198231] BUG: Bad rss-counter state mm:00000000224239e8 type:MM_ANONPAGES val:22 [ 37.631859] BUG: Bad rss-counter state mm:0000000028b019c0 type:MM_FILEPAGES val:33 [ 37.632765] BUG: Bad rss-counter state mm:0000000028b019c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61525' (ECDSA) to the list of known hosts. 2023/06/20 18:34:58 fuzzer started 2023/06/20 18:34:58 dialing manager at localhost:36067 2023/06/20 18:34:58 checking machine... 2023/06/20 18:34:58 checking revisions... [ 38.340869] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:34:58 testing simple program... [ 38.393352] cgroup: Unknown subsys name 'net' [ 38.443027] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:34:57 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000009a01b008 RCX=ffff88806c4d8040 RDX=0000000000000008 RSI=0000000000000001 RDI=0000000015a70f04 RBP=ffff8880101d6fb0 RSP=ffff88806ce09b48 R8 =00000000cf6a7ad3 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff88806ce09bb0 R15=0000000000000008 RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007f22edb34900 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=00007ffcba12f000 CR3=000000000da96000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fc5fd2a2df0 CR3=000000000eac6000 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=2037353a34333a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a34333a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000