syzkaller login: [ 74.217822] BUG: Bad rss-counter state mm:00000000c5a0d749 type:MM_FILEPAGES val:33 [ 74.219056] BUG: Bad rss-counter state mm:00000000c5a0d749 type:MM_ANONPAGES val:22 [ 74.293621] ================================================================== [ 74.294588] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 74.295558] Read of size 8 at addr ffff888019db53f8 by task sshd/219 [ 74.296351] [ 74.296573] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 74.297775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 74.298793] Call Trace: [ 74.299126] [ 74.299434] dump_stack_lvl+0x91/0xf0 [ 74.299942] print_report+0xcc/0x620 [ 74.300458] ? __virt_addr_valid+0x102/0x340 [ 74.301017] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.301659] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.302285] kasan_report+0xbe/0xf0 [ 74.302757] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.303366] vma_interval_tree_remove+0xc75/0xec0 [ 74.303970] vma_prepare+0xc54/0x11a0 [ 74.304454] __split_vma+0x5af/0x950 [ 74.304921] ? __pfx___split_vma+0x10/0x10 [ 74.305463] ? find_held_lock+0x2c/0x110 [ 74.306006] do_vmi_align_munmap+0x2ba/0x11f0 [ 74.306584] ? lock_is_held_type+0x9f/0x120 [ 74.307152] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 74.307776] ? mtree_range_walk+0x632/0x900 [ 74.308356] ? mas_walk+0x5c7/0x7c0 [ 74.308837] do_vmi_munmap+0x1f1/0x2b0 [ 74.309331] mmap_region+0x1f9/0x2660 [ 74.309822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 74.310342] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 74.311058] ? __pfx_lock_acquire+0x10/0x10 [ 74.311589] ? __pfx_mmap_region+0x10/0x10 [ 74.312120] ? security_mmap_addr+0x7d/0xa0 [ 74.312667] ? get_unmapped_area+0x1f5/0x3f0 [ 74.313214] do_mmap+0x854/0xf00 [ 74.313657] vm_mmap_pgoff+0x1a6/0x3a0 [ 74.314159] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 74.314731] ksys_mmap_pgoff+0x3af/0x500 [ 74.315235] do_syscall_64+0x3f/0x90 [ 74.315709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.316375] RIP: 0033:0x7fcaa604cd82 [ 74.316830] 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 [ 74.318952] RSP: 002b:00007ffc6537d9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 74.319845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcaa604cd82 [ 74.320716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcaa5486000 [ 74.321553] RBP: 00007fcaa5486000 R08: 0000000000000009 R09: 0000000000001000 [ 74.322403] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559041271ec0 [ 74.323259] R13: 00007ffc6537d9f0 R14: 00007ffc6537da20 R15: 00007ffc6537dd80 [ 74.324110] [ 74.324419] [ 74.324638] Allocated by task 212: [ 74.325085] kasan_save_stack+0x22/0x50 [ 74.325595] kasan_set_track+0x25/0x30 [ 74.326091] __kasan_slab_alloc+0x59/0x70 [ 74.326621] kmem_cache_alloc+0x16b/0x370 [ 74.327142] vm_area_dup+0x20/0x160 [ 74.327602] __split_vma+0x170/0x950 [ 74.328070] split_vma+0xc6/0x110 [ 74.328523] mprotect_fixup+0x8d2/0xb30 [ 74.329031] do_mprotect_pkey+0x87e/0xd40 [ 74.329556] __x64_sys_mprotect+0x78/0xc0 [ 74.330077] do_syscall_64+0x3f/0x90 [ 74.330558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.331200] [ 74.331418] Freed by task 212: [ 74.331816] kasan_save_stack+0x22/0x50 [ 74.332347] kasan_set_track+0x25/0x30 [ 74.332845] kasan_save_free_info+0x2b/0x50 [ 74.333386] __kasan_slab_free+0x10a/0x190 [ 74.333915] kmem_cache_free+0x10d/0x4d0 [ 74.334423] rcu_core+0x8c8/0x2860 [ 74.334868] __do_softirq+0x1b7/0x7d4 [ 74.335345] [ 74.335558] Last potentially related work creation: [ 74.336152] kasan_save_stack+0x22/0x50 [ 74.336664] __kasan_record_aux_stack+0x8e/0xa0 [ 74.337241] __call_rcu_common.constprop.0+0x6a/0xb90 [ 74.337888] remove_vma+0x139/0x170 [ 74.338343] do_vmi_align_munmap+0xd4a/0x11f0 [ 74.338905] do_vmi_munmap+0x1f1/0x2b0 [ 74.339391] __vm_munmap+0x138/0x3a0 [ 74.339869] __x64_sys_munmap+0x59/0x80 [ 74.340381] do_syscall_64+0x3f/0x90 [ 74.340851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.341495] [ 74.341707] The buggy address belongs to the object at ffff888019db53a0 [ 74.341707] which belongs to the cache vm_area_struct of size 168 [ 74.343178] The buggy address is located 88 bytes inside of [ 74.343178] freed 168-byte region [ffff888019db53a0, ffff888019db5448) [ 74.344586] [ 74.344804] The buggy address belongs to the physical page: [ 74.345465] page:0000000039646658 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19db5 [ 74.346544] memcg:ffff888019de4a01 [ 74.346974] flags: 0x100000000000200(slab|node=0|zone=1) [ 74.347621] page_type: 0xffffffff() [ 74.348080] raw: 0100000000000200 ffff88800879fc80 ffffea00005a8f40 000000000000000a [ 74.349022] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019de4a01 [ 74.349948] page dumped because: kasan: bad access detected [ 74.350623] [ 74.350843] Memory state around the buggy address: [ 74.351434] ffff888019db5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 74.352311] ffff888019db5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 74.353176] >ffff888019db5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 74.354030] ^ [ 74.354891] ffff888019db5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 74.355759] ffff888019db5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 74.356635] ================================================================== [ 74.357683] Disabling lock debugging due to kernel taint [ 76.641127] BUG: Bad rss-counter state mm:00000000bda78696 type:MM_FILEPAGES val:33 [ 76.642108] BUG: Bad rss-counter state mm:00000000bda78696 type:MM_ANONPAGES val:22 [ 77.109146] BUG: Bad rss-counter state mm:00000000b6a23d6a type:MM_FILEPAGES val:33 [ 77.110540] BUG: Bad rss-counter state mm:00000000b6a23d6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4801' (ECDSA) to the list of known hosts. 2023/06/19 15:51:44 fuzzer started 2023/06/19 15:51:44 dialing manager at localhost:44161 2023/06/19 15:51:44 checking machine... 2023/06/19 15:51:44 checking revisions... [ 77.819143] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:51:45 testing simple program... [ 77.870874] cgroup: Unknown subsys name 'net' [ 77.921881] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:51:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000014 RCX=ffffffff83665059 RDX=ffff88800ef90000 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff88801a07c000 RSP=ffff8880166bf958 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=000019a2000019a2 R12=0000000000000000 R13=0000000000000000 R14=ffff88801cab6106 R15=ffff8880166bf9f0 RIP=ffffffff814c07e0 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 00007f11ac184900 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=00007ffc906f4000 CR3=000000000c5fe000 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=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=00007fb78b43e3b0 CR3=0000000015854000 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=2034343a31353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a31353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000