syzkaller login: [ 250.819405] BUG: Bad rss-counter state mm:00000000da73ed28 type:MM_FILEPAGES val:33 [ 250.820773] BUG: Bad rss-counter state mm:00000000da73ed28 type:MM_ANONPAGES val:22 [ 250.918095] ================================================================== [ 250.918994] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 250.919923] Read of size 8 at addr ffff8880198f0c20 by task sshd/221 [ 250.920795] [ 250.921011] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 250.922041] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 250.923020] Call Trace: [ 250.923337] [ 250.923621] dump_stack_lvl+0x91/0xf0 [ 250.924135] print_report+0xcc/0x620 [ 250.924620] ? __virt_addr_valid+0x102/0x340 [ 250.925170] ? vma_interval_tree_remove+0xc75/0xec0 [ 250.925782] ? vma_interval_tree_remove+0xc75/0xec0 [ 250.926388] kasan_report+0xbe/0xf0 [ 250.926858] ? vma_interval_tree_remove+0xc75/0xec0 [ 250.927462] vma_interval_tree_remove+0xc75/0xec0 [ 250.928066] vma_prepare+0xc54/0x11a0 [ 250.928547] __split_vma+0x5af/0x950 [ 250.929014] ? __pfx___split_vma+0x10/0x10 [ 250.929533] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 250.930169] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 250.930836] do_vmi_align_munmap+0x2ba/0x11f0 [ 250.931392] ? lock_is_held_type+0x9f/0x120 [ 250.931921] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 250.932531] ? mtree_range_walk+0x632/0x900 [ 250.933075] ? mas_walk+0x5c7/0x7c0 [ 250.933545] do_vmi_munmap+0x1f1/0x2b0 [ 250.934030] mmap_region+0x1f9/0x2660 [ 250.934501] ? vm_mmap_pgoff+0x15c/0x3a0 [ 250.935007] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 250.935710] ? __pfx_lock_acquire+0x10/0x10 [ 250.936247] ? __pfx_mmap_region+0x10/0x10 [ 250.936769] ? security_mmap_addr+0x7d/0xa0 [ 250.937288] ? get_unmapped_area+0x1f5/0x3f0 [ 250.937824] do_mmap+0x854/0xf00 [ 250.938253] vm_mmap_pgoff+0x1a6/0x3a0 [ 250.938743] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 250.939292] ksys_mmap_pgoff+0x3af/0x500 [ 250.939789] do_syscall_64+0x3f/0x90 [ 250.940265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 250.940898] RIP: 0033:0x7f6234b99d82 [ 250.941353] 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 [ 250.943445] RSP: 002b:00007ffe4d99b3a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 250.944350] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6234b99d82 [ 250.945180] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6233fd3000 [ 250.946014] RBP: 00007f6233fd3000 R08: 0000000000000009 R09: 0000000000001000 [ 250.946845] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563289c73ec0 [ 250.947670] R13: 00007ffe4d99b3c0 R14: 00007ffe4d99b3f0 R15: 00007ffe4d99b750 [ 250.948516] [ 250.948807] [ 250.949021] Allocated by task 214: [ 250.949444] kasan_save_stack+0x22/0x50 [ 250.949944] kasan_set_track+0x25/0x30 [ 250.950431] __kasan_slab_alloc+0x59/0x70 [ 250.950947] kmem_cache_alloc+0x16b/0x370 [ 250.951450] vm_area_dup+0x20/0x160 [ 250.951893] __split_vma+0x170/0x950 [ 250.952374] split_vma+0xc6/0x110 [ 250.952807] mprotect_fixup+0x8d2/0xb30 [ 250.953301] do_mprotect_pkey+0x87e/0xd40 [ 250.953813] __x64_sys_mprotect+0x78/0xc0 [ 250.954327] do_syscall_64+0x3f/0x90 [ 250.954793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 250.955423] [ 250.955636] Freed by task 214: [ 250.956027] kasan_save_stack+0x22/0x50 [ 250.956529] kasan_set_track+0x25/0x30 [ 250.957010] kasan_save_free_info+0x2b/0x50 [ 250.957533] __kasan_slab_free+0x10a/0x190 [ 250.958054] kmem_cache_free+0x10d/0x4d0 [ 250.958557] rcu_core+0x8c8/0x2860 [ 250.958994] __do_softirq+0x1b7/0x7d4 [ 250.959464] [ 250.959675] Last potentially related work creation: [ 250.960257] kasan_save_stack+0x22/0x50 [ 250.960747] __kasan_record_aux_stack+0x8e/0xa0 [ 250.961313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 250.961955] remove_vma+0x139/0x170 [ 250.962397] do_vmi_align_munmap+0xd4a/0x11f0 [ 250.962944] do_vmi_munmap+0x1f1/0x2b0 [ 250.963427] __vm_munmap+0x138/0x3a0 [ 250.963889] __x64_sys_munmap+0x59/0x80 [ 250.964391] do_syscall_64+0x3f/0x90 [ 250.964857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 250.965488] [ 250.965702] The buggy address belongs to the object at ffff8880198f0bc8 [ 250.965702] which belongs to the cache vm_area_struct of size 168 [ 250.967164] The buggy address is located 88 bytes inside of [ 250.967164] freed 168-byte region [ffff8880198f0bc8, ffff8880198f0c70) [ 250.968558] [ 250.968770] The buggy address belongs to the physical page: [ 250.969414] page:00000000b85ab90a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198f0 [ 250.970477] memcg:ffff88800e5d6601 [ 250.970895] flags: 0x100000000000200(slab|node=0|zone=1) [ 250.971520] page_type: 0xffffffff() [ 250.971950] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 250.972852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5d6601 [ 250.973733] page dumped because: kasan: bad access detected [ 250.974375] [ 250.974583] Memory state around the buggy address: [ 250.975148] ffff8880198f0b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 250.975986] ffff8880198f0b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 250.976833] >ffff8880198f0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 250.977659] ^ [ 250.978176] ffff8880198f0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 250.979007] ffff8880198f0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 250.979836] ================================================================== [ 250.980788] Disabling lock debugging due to kernel taint [ 253.434264] BUG: Bad rss-counter state mm:00000000d3cbc83e type:MM_FILEPAGES val:33 [ 253.434972] BUG: Bad rss-counter state mm:00000000d3cbc83e type:MM_ANONPAGES val:22 [ 253.993423] BUG: Bad rss-counter state mm:0000000015f3a178 type:MM_FILEPAGES val:33 [ 253.994356] BUG: Bad rss-counter state mm:0000000015f3a178 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27474' (ECDSA) to the list of known hosts. 2023/06/19 18:02:47 fuzzer started 2023/06/19 18:02:47 dialing manager at localhost:44161 2023/06/19 18:02:47 checking machine... 2023/06/19 18:02:47 checking revisions... [ 254.535137] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:02:47 testing simple program... [ 254.588432] cgroup: Unknown subsys name 'net' [ 254.655611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:59:07 Registers: info registers vcpu 0 RAX=ffffffff8609675b RBX=0000000000000001 RCX=ffffffff86096756 RDX=dffffc0000000000 RSI=1ffffffff0c12ceb RDI=ffffffff85d91630 RBP=ffff88801691f1d8 RSP=ffff88801691f0c0 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88801691f1e0 R13=ffff88801691f1c8 R14=ffff88801691f1c1 R15=ffff88801691f180 RIP=ffffffff81130a57 RFL=00000216 [----AP-] 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 00007f7fb5b24900 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=00007f398cb68b80 CR3=000000000ca72000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=736f6c63206e6f697463656e6e6f4300 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=00007ffff2f3eff8 CR3=0000000005482000 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=00007f1870c365100000562c98d2f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000