syzkaller login: [ 68.720769] BUG: Bad rss-counter state mm:0000000090c26eed type:MM_FILEPAGES val:33 [ 68.721911] BUG: Bad rss-counter state mm:0000000090c26eed type:MM_ANONPAGES val:22 [ 68.879446] ================================================================== [ 68.880377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.881347] Read of size 8 at addr ffff8880162b4798 by task sshd/226 [ 68.882216] [ 68.882439] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.883295] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.884317] Call Trace: [ 68.884661] [ 68.884960] dump_stack_lvl+0x91/0xf0 [ 68.885474] print_report+0xcc/0x620 [ 68.885982] ? __virt_addr_valid+0x102/0x340 [ 68.886538] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.887185] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.887820] kasan_report+0xbe/0xf0 [ 68.888306] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.888951] vma_interval_tree_remove+0xc75/0xec0 [ 68.889597] vma_prepare+0xc54/0x11a0 [ 68.890099] __split_vma+0x5af/0x950 [ 68.890577] ? __pfx___split_vma+0x10/0x10 [ 68.891122] ? find_held_lock+0x2c/0x110 [ 68.891645] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.892230] ? lock_is_held_type+0x9f/0x120 [ 68.892788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.893405] ? mtree_range_walk+0x632/0x900 [ 68.893980] ? mas_walk+0x5c7/0x7c0 [ 68.894465] do_vmi_munmap+0x1f1/0x2b0 [ 68.894989] mmap_region+0x1f9/0x2660 [ 68.895485] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.896017] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.896742] ? __pfx_lock_acquire+0x10/0x10 [ 68.897304] ? __pfx_mmap_region+0x10/0x10 [ 68.897858] ? security_mmap_addr+0x7d/0xa0 [ 68.898401] ? get_unmapped_area+0x1f5/0x3f0 [ 68.898973] do_mmap+0x854/0xf00 [ 68.899418] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.899933] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.900499] ksys_mmap_pgoff+0x3af/0x500 [ 68.901032] do_syscall_64+0x3f/0x90 [ 68.901542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.902218] RIP: 0033:0x7ff5ed129d82 [ 68.902686] 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 [ 68.904854] RSP: 002b:00007ffc2aa14108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.905800] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5ed129d82 [ 68.906690] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff5ec563000 [ 68.907539] RBP: 00007ff5ec563000 R08: 0000000000000009 R09: 0000000000001000 [ 68.908401] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bab877eec0 [ 68.909295] R13: 00007ffc2aa14120 R14: 00007ffc2aa14150 R15: 00007ffc2aa144b0 [ 68.910177] [ 68.910477] [ 68.910703] Allocated by task 219: [ 68.911135] kasan_save_stack+0x22/0x50 [ 68.911634] kasan_set_track+0x25/0x30 [ 68.912167] __kasan_slab_alloc+0x59/0x70 [ 68.912719] kmem_cache_alloc+0x16b/0x370 [ 68.913263] vm_area_dup+0x20/0x160 [ 68.913749] __split_vma+0x170/0x950 [ 68.914222] split_vma+0xc6/0x110 [ 68.914668] mprotect_fixup+0x8d2/0xb30 [ 68.915184] do_mprotect_pkey+0x87e/0xd40 [ 68.915726] __x64_sys_mprotect+0x78/0xc0 [ 68.916258] do_syscall_64+0x3f/0x90 [ 68.916753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.917431] [ 68.917652] Freed by task 19: [ 68.918052] kasan_save_stack+0x22/0x50 [ 68.918559] kasan_set_track+0x25/0x30 [ 68.919069] kasan_save_free_info+0x2b/0x50 [ 68.919606] __kasan_slab_free+0x10a/0x190 [ 68.920151] kmem_cache_free+0x10d/0x4d0 [ 68.920669] rcu_core+0x8c8/0x2860 [ 68.921132] __do_softirq+0x1b7/0x7d4 [ 68.921625] [ 68.921851] Last potentially related work creation: [ 68.922438] kasan_save_stack+0x22/0x50 [ 68.922959] __kasan_record_aux_stack+0x8e/0xa0 [ 68.923542] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.924217] remove_vma+0x139/0x170 [ 68.924684] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.925263] do_vmi_munmap+0x1f1/0x2b0 [ 68.925766] __vm_munmap+0x138/0x3a0 [ 68.926241] __x64_sys_munmap+0x59/0x80 [ 68.926767] do_syscall_64+0x3f/0x90 [ 68.927245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.927903] [ 68.928118] The buggy address belongs to the object at ffff8880162b4740 [ 68.928118] which belongs to the cache vm_area_struct of size 168 [ 68.929622] The buggy address is located 88 bytes inside of [ 68.929622] freed 168-byte region [ffff8880162b4740, ffff8880162b47e8) [ 68.931064] [ 68.931284] The buggy address belongs to the physical page: [ 68.931954] page:00000000495e94ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x162b4 [ 68.933084] memcg:ffff88800c5a1501 [ 68.933521] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.934192] page_type: 0xffffffff() [ 68.934652] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.935583] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5a1501 [ 68.936517] page dumped because: kasan: bad access detected [ 68.937221] [ 68.937447] Memory state around the buggy address: [ 68.938043] ffff8880162b4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.938928] ffff8880162b4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 68.939806] >ffff8880162b4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 68.940686] ^ [ 68.941194] ffff8880162b4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 68.942063] ffff8880162b4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 68.942936] ================================================================== [ 68.943906] Disabling lock debugging due to kernel taint [ 70.873917] BUG: Bad rss-counter state mm:000000007325e00c type:MM_FILEPAGES val:33 [ 70.874914] BUG: Bad rss-counter state mm:000000007325e00c type:MM_ANONPAGES val:22 [ 71.422801] BUG: Bad rss-counter state mm:000000005211a00f type:MM_FILEPAGES val:33 [ 71.423962] BUG: Bad rss-counter state mm:000000005211a00f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35191' (ECDSA) to the list of known hosts. 2023/06/20 18:12:03 fuzzer started 2023/06/20 18:12:03 dialing manager at localhost:36067 2023/06/20 18:12:03 checking machine... 2023/06/20 18:12:03 checking revisions... [ 72.059601] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:12:03 testing simple program... [ 72.113077] cgroup: Unknown subsys name 'net' [ 72.153346] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:12:02 Registers: info registers vcpu 0 RAX=ffffffff81f16b40 RBX=ffffffff852ca058 RCX=0000000000000000 RDX=ffff88801655d1c0 RSI=ffff888019afd140 RDI=ffff888015dd05e0 RBP=ffff888019afd140 RSP=ffff888019fa7d30 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888015dd05e0 R13=ffff888015dd05e0 R14=ffffffff84d2fb80 R15=ffff888008f7a000 RIP=ffffffff814c0864 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 00007fe5eb2e0900 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=00007ffe5d43d000 CR3=000000000ebcc000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007ffb860c7048 CR3=000000000dcda000 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=2032303a32313a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a32313a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000