syzkaller login: [ 32.745526] BUG: Bad rss-counter state mm:0000000055da062d type:MM_FILEPAGES val:33 [ 32.746727] BUG: Bad rss-counter state mm:0000000055da062d type:MM_ANONPAGES val:22 [ 32.891811] ================================================================== [ 32.892848] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.893752] Read of size 8 at addr ffff888019dfd310 by task sshd/220 [ 32.894558] [ 32.894765] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.895578] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.896506] Call Trace: [ 32.896812] [ 32.897079] dump_stack_lvl+0x91/0xf0 [ 32.897543] print_report+0xcc/0x620 [ 32.897999] ? __virt_addr_valid+0x102/0x340 [ 32.898523] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.899105] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.899683] kasan_report+0xbe/0xf0 [ 32.900130] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.900718] vma_interval_tree_remove+0xc75/0xec0 [ 32.901286] vma_prepare+0xc54/0x11a0 [ 32.901739] __split_vma+0x5af/0x950 [ 32.902184] ? __pfx___split_vma+0x10/0x10 [ 32.902682] ? find_held_lock+0x2c/0x110 [ 32.903176] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.903710] ? lock_is_held_type+0x9f/0x120 [ 32.904222] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.904809] ? mtree_range_walk+0x632/0x900 [ 32.905329] ? mas_walk+0x5c7/0x7c0 [ 32.905777] do_vmi_munmap+0x1f1/0x2b0 [ 32.906247] mmap_region+0x1f9/0x2660 [ 32.906702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.907188] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.907857] ? __pfx_lock_acquire+0x10/0x10 [ 32.908357] ? __pfx_mmap_region+0x10/0x10 [ 32.908867] ? security_mmap_addr+0x7d/0xa0 [ 32.909368] ? get_unmapped_area+0x1f5/0x3f0 [ 32.909882] do_mmap+0x854/0xf00 [ 32.910295] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.910765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.911292] ksys_mmap_pgoff+0x3af/0x500 [ 32.911770] do_syscall_64+0x3f/0x90 [ 32.912222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.912834] RIP: 0033:0x7f51dfeaed82 [ 32.913267] 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 [ 32.915251] RSP: 002b:00007ffd4e663cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.916106] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51dfeaed82 [ 32.916919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51df2e8000 [ 32.917706] RBP: 00007f51df2e8000 R08: 0000000000000009 R09: 0000000000001000 [ 32.918494] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0026feec0 [ 32.919294] R13: 00007ffd4e663d10 R14: 00007ffd4e663d40 R15: 00007ffd4e6640a0 [ 32.920101] [ 32.920381] [ 32.920588] Allocated by task 213: [ 32.920996] kasan_save_stack+0x22/0x50 [ 32.921477] kasan_set_track+0x25/0x30 [ 32.921943] __kasan_slab_alloc+0x59/0x70 [ 32.922436] kmem_cache_alloc+0x16b/0x370 [ 32.922926] vm_area_dup+0x20/0x160 [ 32.923356] __split_vma+0x170/0x950 [ 32.923797] split_vma+0xc6/0x110 [ 32.924212] mprotect_fixup+0x8d2/0xb30 [ 32.924691] do_mprotect_pkey+0x87e/0xd40 [ 32.925189] __x64_sys_mprotect+0x78/0xc0 [ 32.925678] do_syscall_64+0x3f/0x90 [ 32.926128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.926740] [ 32.926943] Freed by task 213: [ 32.927318] kasan_save_stack+0x22/0x50 [ 32.927788] kasan_set_track+0x25/0x30 [ 32.928259] kasan_save_free_info+0x2b/0x50 [ 32.928776] __kasan_slab_free+0x10a/0x190 [ 32.929275] kmem_cache_free+0x10d/0x4d0 [ 32.929755] rcu_core+0x8c8/0x2860 [ 32.930169] __do_softirq+0x1b7/0x7d4 [ 32.930615] [ 32.930818] Last potentially related work creation: [ 32.931373] kasan_save_stack+0x22/0x50 [ 32.931849] __kasan_record_aux_stack+0x8e/0xa0 [ 32.932385] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.932995] remove_vma+0x139/0x170 [ 32.933422] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.933944] do_vmi_munmap+0x1f1/0x2b0 [ 32.934411] __vm_munmap+0x138/0x3a0 [ 32.934855] __x64_sys_munmap+0x59/0x80 [ 32.935332] do_syscall_64+0x3f/0x90 [ 32.935777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.936385] [ 32.936587] The buggy address belongs to the object at ffff888019dfd2b8 [ 32.936587] which belongs to the cache vm_area_struct of size 168 [ 32.937970] The buggy address is located 88 bytes inside of [ 32.937970] freed 168-byte region [ffff888019dfd2b8, ffff888019dfd360) [ 32.939285] [ 32.939493] The buggy address belongs to the physical page: [ 32.940111] page:00000000731d37ba refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888019dfdbc8 pfn:0x19dfd [ 32.941284] memcg:ffff888017c2d501 [ 32.941690] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.942292] page_type: 0xffffffff() [ 32.942719] raw: 0100000000000200 ffff88800879fc80 ffffea000032f1c0 dead000000000004 [ 32.943572] raw: ffff888019dfdbc8 000000008011000e 00000001ffffffff ffff888017c2d501 [ 32.944420] page dumped because: kasan: bad access detected [ 32.945042] [ 32.945251] Memory state around the buggy address: [ 32.945797] ffff888019dfd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.946602] ffff888019dfd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.947411] >ffff888019dfd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.948213] ^ [ 32.948649] ffff888019dfd380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.949468] ffff888019dfd400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.950267] ================================================================== [ 32.951229] Disabling lock debugging due to kernel taint [ 35.491183] BUG: Bad rss-counter state mm:00000000007a1225 type:MM_FILEPAGES val:33 [ 35.492707] BUG: Bad rss-counter state mm:00000000007a1225 type:MM_ANONPAGES val:22 [ 35.934388] BUG: Bad rss-counter state mm:00000000fc1c3006 type:MM_FILEPAGES val:33 [ 35.935593] BUG: Bad rss-counter state mm:00000000fc1c3006 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50748' (ECDSA) to the list of known hosts. 2023/06/20 01:33:49 fuzzer started 2023/06/20 01:33:49 dialing manager at localhost:44161 2023/06/20 01:33:49 checking machine... 2023/06/20 01:33:49 checking revisions... [ 36.660020] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:33:49 testing simple program... [ 36.712372] cgroup: Unknown subsys name 'net' [ 36.749443] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:33:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffc8de59ba8 CR3=0000000005482000 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=00007fb70ceea51000005595ee602790 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 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffff8880158103f4 RBP=ffff888015810000 RSP=ffff888019f1f838 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888015810000 R13=0000000000000000 R14=ffffffff85652a88 R15=0000000000092cc0 RIP=ffffffff813744d5 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 00007fcb0d0e8900 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=00007fcb0d6a00b0 CR3=000000000eb26000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000