syzkaller login: [ 33.174052] BUG: Bad rss-counter state mm:000000000a01d75d type:MM_FILEPAGES val:33 [ 33.175674] BUG: Bad rss-counter state mm:000000000a01d75d type:MM_ANONPAGES val:22 [ 33.353734] ================================================================== [ 33.354762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.355821] Read of size 8 at addr ffff88800f75cb38 by task sshd/219 [ 33.356806] [ 33.357055] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.358017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.359112] Call Trace: [ 33.359468] [ 33.359783] dump_stack_lvl+0x91/0xf0 [ 33.360337] print_report+0xcc/0x620 [ 33.360886] ? __virt_addr_valid+0x102/0x340 [ 33.361501] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.362192] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.362884] kasan_report+0xbe/0xf0 [ 33.363454] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.364207] vma_interval_tree_remove+0xc75/0xec0 [ 33.364937] vma_prepare+0xc54/0x11a0 [ 33.365514] __split_vma+0x5af/0x950 [ 33.366091] ? __pfx___split_vma+0x10/0x10 [ 33.366737] ? find_held_lock+0x2c/0x110 [ 33.367376] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.368062] ? lock_is_held_type+0x9f/0x120 [ 33.368714] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.369468] ? mtree_range_walk+0x632/0x900 [ 33.370158] ? mas_walk+0x5c7/0x7c0 [ 33.370726] do_vmi_munmap+0x1f1/0x2b0 [ 33.371283] mmap_region+0x1f9/0x2660 [ 33.371829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.372410] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.373223] ? __pfx_lock_acquire+0x10/0x10 [ 33.373839] ? __pfx_mmap_region+0x10/0x10 [ 33.374446] ? security_mmap_addr+0x7d/0xa0 [ 33.375044] ? get_unmapped_area+0x1f5/0x3f0 [ 33.375676] do_mmap+0x854/0xf00 [ 33.376171] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.376739] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.377381] ksys_mmap_pgoff+0x3af/0x500 [ 33.377955] do_syscall_64+0x3f/0x90 [ 33.378518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.379254] RIP: 0033:0x7f0b781d8d82 [ 33.379772] 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 [ 33.382163] RSP: 002b:00007ffc98eddae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.383164] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b781d8d82 [ 33.384104] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b77612000 [ 33.385057] RBP: 00007f0b77612000 R08: 0000000000000009 R09: 0000000000001000 [ 33.386001] R10: 0000000000000812 R11: 0000000000000206 R12: 000056166428cec0 [ 33.386948] R13: 00007ffc98eddb00 R14: 00007ffc98eddb30 R15: 00007ffc98edde90 [ 33.387978] [ 33.388325] [ 33.388580] Allocated by task 212: [ 33.389108] kasan_save_stack+0x22/0x50 [ 33.389702] kasan_set_track+0x25/0x30 [ 33.390288] __kasan_slab_alloc+0x59/0x70 [ 33.390926] kmem_cache_alloc+0x16b/0x370 [ 33.391564] vm_area_dup+0x20/0x160 [ 33.392115] __split_vma+0x170/0x950 [ 33.392676] split_vma+0xc6/0x110 [ 33.393208] mprotect_fixup+0x8d2/0xb30 [ 33.393802] do_mprotect_pkey+0x87e/0xd40 [ 33.394436] __x64_sys_mprotect+0x78/0xc0 [ 33.395049] do_syscall_64+0x3f/0x90 [ 33.395604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.396380] [ 33.396634] Freed by task 212: [ 33.397116] kasan_save_stack+0x22/0x50 [ 33.397720] kasan_set_track+0x25/0x30 [ 33.398300] kasan_save_free_info+0x2b/0x50 [ 33.398956] __kasan_slab_free+0x10a/0x190 [ 33.399582] kmem_cache_free+0x10d/0x4d0 [ 33.400190] rcu_core+0x8c8/0x2860 [ 33.400731] __do_softirq+0x1b7/0x7d4 [ 33.401302] [ 33.401561] Last potentially related work creation: [ 33.402279] kasan_save_stack+0x22/0x50 [ 33.402889] __kasan_record_aux_stack+0x8e/0xa0 [ 33.403570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.404296] remove_vma+0x139/0x170 [ 33.404796] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.405410] do_vmi_munmap+0x1f1/0x2b0 [ 33.405943] __vm_munmap+0x138/0x3a0 [ 33.406458] __x64_sys_munmap+0x59/0x80 [ 33.407002] do_syscall_64+0x3f/0x90 [ 33.407524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.408237] [ 33.408481] The buggy address belongs to the object at ffff88800f75cae0 [ 33.408481] which belongs to the cache vm_area_struct of size 168 [ 33.410118] The buggy address is located 88 bytes inside of [ 33.410118] freed 168-byte region [ffff88800f75cae0, ffff88800f75cb88) [ 33.411657] [ 33.411893] The buggy address belongs to the physical page: [ 33.412615] page:00000000c0c77f82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf75c [ 33.413808] memcg:ffff88800eb54d01 [ 33.414278] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.415071] page_type: 0xffffffff() [ 33.415571] raw: 0100000000000200 ffff88800879fc80 ffffea00003994c0 dead000000000003 [ 33.416598] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb54d01 [ 33.417607] page dumped because: kasan: bad access detected [ 33.418333] [ 33.418568] Memory state around the buggy address: [ 33.419214] ffff88800f75ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.420163] ffff88800f75ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 33.421111] >ffff88800f75cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.422047] ^ [ 33.422714] ffff88800f75cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.423649] ffff88800f75cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.424600] ================================================================== [ 33.425898] Disabling lock debugging due to kernel taint [ 35.759243] BUG: Bad rss-counter state mm:00000000eab9b5ab type:MM_FILEPAGES val:33 [ 35.760149] BUG: Bad rss-counter state mm:00000000eab9b5ab type:MM_ANONPAGES val:22 [ 36.296391] BUG: Bad rss-counter state mm:00000000fe793f7d type:MM_FILEPAGES val:33 [ 36.297413] BUG: Bad rss-counter state mm:00000000fe793f7d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34128' (ECDSA) to the list of known hosts. 2023/06/19 18:08:39 fuzzer started 2023/06/19 18:08:39 dialing manager at localhost:44161 2023/06/19 18:08:39 checking machine... 2023/06/19 18:08:39 checking revisions... [ 36.948920] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:08:39 testing simple program... [ 36.995300] cgroup: Unknown subsys name 'net' [ 37.049393] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:08:36 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000540 RCX=0000000000000001 RDX=0000000000000cc0 RSI=ffff888017da3900 RDI=ffff888008fce500 RBP=ffff888017ea7d90 RSP=ffff888017ea7d20 R8 =ffff888017ea7d50 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008fce500 R13=ffff888017da3900 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff81803b52 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 00007f8d85299900 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=00007f8d858510b0 CR3=000000000f294000 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=0000000000000001 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=00007ffd39b63918 CR3=000000000ecfe000 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=2038333a38303a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a38303a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000