syzkaller login: [ 31.048387] BUG: Bad rss-counter state mm:00000000cb320164 type:MM_FILEPAGES val:33 [ 31.049610] BUG: Bad rss-counter state mm:00000000cb320164 type:MM_ANONPAGES val:22 [ 31.238881] ================================================================== [ 31.240003] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.241123] Read of size 8 at addr ffff88800de8c140 by task sshd/219 [ 31.241995] [ 31.242314] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.243278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.244315] Call Trace: [ 31.244687] [ 31.245070] dump_stack_lvl+0x91/0xf0 [ 31.245628] print_report+0xcc/0x620 [ 31.246141] ? __virt_addr_valid+0x102/0x340 [ 31.246776] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.247466] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.248216] kasan_report+0xbe/0xf0 [ 31.248725] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249390] vma_interval_tree_remove+0xc75/0xec0 [ 31.250066] vma_prepare+0xc54/0x11a0 [ 31.250706] __split_vma+0x5af/0x950 [ 31.251261] ? __pfx___split_vma+0x10/0x10 [ 31.251836] ? find_held_lock+0x2c/0x110 [ 31.252424] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.253097] ? lock_is_held_type+0x9f/0x120 [ 31.253716] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.254369] ? mtree_range_walk+0x632/0x900 [ 31.254986] ? mas_walk+0x5c7/0x7c0 [ 31.255533] do_vmi_munmap+0x1f1/0x2b0 [ 31.256140] mmap_region+0x1f9/0x2660 [ 31.256690] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.257244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.258037] ? __pfx_lock_acquire+0x10/0x10 [ 31.258741] ? __pfx_mmap_region+0x10/0x10 [ 31.259314] ? security_mmap_addr+0x7d/0xa0 [ 31.259888] ? get_unmapped_area+0x1f5/0x3f0 [ 31.260477] do_mmap+0x854/0xf00 [ 31.261005] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.261602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.262240] ksys_mmap_pgoff+0x3af/0x500 [ 31.262815] do_syscall_64+0x3f/0x90 [ 31.263363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264151] RIP: 0033:0x7f6ccdfa6d82 [ 31.264653] 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 [ 31.267042] RSP: 002b:00007ffd86fda0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.268053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ccdfa6d82 [ 31.268997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ccd3e0000 [ 31.270017] RBP: 00007f6ccd3e0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.270951] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560c5abfb20 [ 31.271969] R13: 00007ffd86fda110 R14: 00007ffd86fda140 R15: 00007ffd86fda4a0 [ 31.272942] [ 31.273261] [ 31.273489] Allocated by task 212: [ 31.273992] kasan_save_stack+0x22/0x50 [ 31.274602] kasan_set_track+0x25/0x30 [ 31.275197] __kasan_slab_alloc+0x59/0x70 [ 31.275759] kmem_cache_alloc+0x16b/0x370 [ 31.276354] vm_area_dup+0x20/0x160 [ 31.276837] __split_vma+0x170/0x950 [ 31.277444] split_vma+0xc6/0x110 [ 31.277920] mprotect_fixup+0x8d2/0xb30 [ 31.278458] do_mprotect_pkey+0x87e/0xd40 [ 31.279045] __x64_sys_mprotect+0x78/0xc0 [ 31.279658] do_syscall_64+0x3f/0x90 [ 31.280243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280962] [ 31.281193] Freed by task 212: [ 31.281645] kasan_save_stack+0x22/0x50 [ 31.282187] kasan_set_track+0x25/0x30 [ 31.282820] kasan_save_free_info+0x2b/0x50 [ 31.283389] __kasan_slab_free+0x10a/0x190 [ 31.283954] kmem_cache_free+0x10d/0x4d0 [ 31.284496] rcu_core+0x8c8/0x2860 [ 31.285000] __do_softirq+0x1b7/0x7d4 [ 31.285610] [ 31.285865] Last potentially related work creation: [ 31.286517] kasan_save_stack+0x22/0x50 [ 31.287111] __kasan_record_aux_stack+0x8e/0xa0 [ 31.287786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.288533] remove_vma+0x139/0x170 [ 31.289022] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.289627] do_vmi_munmap+0x1f1/0x2b0 [ 31.290159] __vm_munmap+0x138/0x3a0 [ 31.290773] __x64_sys_munmap+0x59/0x80 [ 31.291308] do_syscall_64+0x3f/0x90 [ 31.291821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292540] [ 31.292776] The buggy address belongs to the object at ffff88800de8c0e8 [ 31.292776] which belongs to the cache vm_area_struct of size 168 [ 31.294456] The buggy address is located 88 bytes inside of [ 31.294456] freed 168-byte region [ffff88800de8c0e8, ffff88800de8c190) [ 31.296081] [ 31.296320] The buggy address belongs to the physical page: [ 31.297027] page:00000000344e6914 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde8c [ 31.298266] memcg:ffff88800fd07001 [ 31.298777] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.299499] page_type: 0xffffffff() [ 31.299987] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.301082] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd07001 [ 31.302098] page dumped because: kasan: bad access detected [ 31.302834] [ 31.303072] Memory state around the buggy address: [ 31.303813] ffff88800de8c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.304785] ffff88800de8c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.305739] >ffff88800de8c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.306788] ^ [ 31.307486] ffff88800de8c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.308423] ffff88800de8c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.309436] ================================================================== [ 31.310496] Disabling lock debugging due to kernel taint [ 33.878080] BUG: Bad rss-counter state mm:0000000015d9a40e type:MM_FILEPAGES val:33 [ 33.879329] BUG: Bad rss-counter state mm:0000000015d9a40e type:MM_ANONPAGES val:22 [ 34.308668] BUG: Bad rss-counter state mm:000000007aad946e type:MM_FILEPAGES val:33 [ 34.309666] BUG: Bad rss-counter state mm:000000007aad946e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27297' (ECDSA) to the list of known hosts. 2023/06/20 12:38:46 fuzzer started 2023/06/20 12:38:46 dialing manager at localhost:36067 2023/06/20 12:38:46 checking machine... 2023/06/20 12:38:46 checking revisions... [ 35.046817] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:38:46 testing simple program... [ 35.098980] cgroup: Unknown subsys name 'net' [ 35.141374] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:38:45 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff8604f5f8 RCX=ffffffff8451105d RDX=0000000000000007 RSI=ffffffff864b2f26 RDI=ffffffff8604f5d8 RBP=ffffffff8604f5d8 RSP=ffff88806ce099e0 R8 =ffffffff864b2f26 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffffffff8604f5f4 R13=ffffffff8604f5d8 R14=ffffffff8604f5d8 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000217 [----APC] 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 00007f31bdce8700 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=00007ffd49413000 CR3=000000000e83a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732035343a3833 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343033 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=0000000000000001 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=00007f0c7b6412c0 CR3=000000000e83a000 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=2035343a38333a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a38333a3231203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000