syzkaller login: [ 31.136535] BUG: Bad rss-counter state mm:000000003f1949e8 type:MM_FILEPAGES val:33 [ 31.138002] BUG: Bad rss-counter state mm:000000003f1949e8 type:MM_ANONPAGES val:22 [ 31.318904] ================================================================== [ 31.320050] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.321422] Read of size 8 at addr ffff888019313880 by task sshd/220 [ 31.322224] [ 31.322459] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.323325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.324342] Call Trace: [ 31.324669] [ 31.324957] dump_stack_lvl+0x91/0xf0 [ 31.325476] print_report+0xcc/0x620 [ 31.325984] ? __virt_addr_valid+0x102/0x340 [ 31.326556] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.327176] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.327823] kasan_report+0xbe/0xf0 [ 31.328307] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.328943] vma_interval_tree_remove+0xc75/0xec0 [ 31.329561] vma_prepare+0xc54/0x11a0 [ 31.330071] __split_vma+0x5af/0x950 [ 31.330565] ? __pfx___split_vma+0x10/0x10 [ 31.331100] ? find_held_lock+0x2c/0x110 [ 31.331652] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.332219] ? lock_is_held_type+0x9f/0x120 [ 31.332788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.333418] ? mtree_range_walk+0x632/0x900 [ 31.334003] ? mas_walk+0x5c7/0x7c0 [ 31.334515] do_vmi_munmap+0x1f1/0x2b0 [ 31.335023] mmap_region+0x1f9/0x2660 [ 31.335533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.336052] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.336810] ? __pfx_lock_acquire+0x10/0x10 [ 31.337368] ? __pfx_mmap_region+0x10/0x10 [ 31.338006] ? security_mmap_addr+0x7d/0xa0 [ 31.338557] ? get_unmapped_area+0x1f5/0x3f0 [ 31.339109] do_mmap+0x854/0xf00 [ 31.339570] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.340069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.340669] ksys_mmap_pgoff+0x3af/0x500 [ 31.341178] do_syscall_64+0x3f/0x90 [ 31.341685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.342369] RIP: 0033:0x7f2eb0d62d82 [ 31.342835] 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 [ 31.344991] RSP: 002b:00007fff05396b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.345910] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2eb0d62d82 [ 31.346804] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2eb019c000 [ 31.347669] RBP: 00007f2eb019c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.348546] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556686a9df70 [ 31.349400] R13: 00007fff05396b70 R14: 00007fff05396ba0 R15: 00007fff05396f00 [ 31.350261] [ 31.350571] [ 31.350789] Allocated by task 213: [ 31.351217] kasan_save_stack+0x22/0x50 [ 31.351745] kasan_set_track+0x25/0x30 [ 31.352242] __kasan_slab_alloc+0x59/0x70 [ 31.352794] kmem_cache_alloc+0x16b/0x370 [ 31.353319] vm_area_dup+0x20/0x160 [ 31.353784] __split_vma+0x170/0x950 [ 31.354260] split_vma+0xc6/0x110 [ 31.354716] mprotect_fixup+0x8d2/0xb30 [ 31.355221] do_mprotect_pkey+0x87e/0xd40 [ 31.355755] __x64_sys_mprotect+0x78/0xc0 [ 31.356277] do_syscall_64+0x3f/0x90 [ 31.356784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.357445] [ 31.357664] Freed by task 210: [ 31.358080] kasan_save_stack+0x22/0x50 [ 31.358600] kasan_set_track+0x25/0x30 [ 31.359095] kasan_save_free_info+0x2b/0x50 [ 31.359636] __kasan_slab_free+0x10a/0x190 [ 31.360172] kmem_cache_free+0x10d/0x4d0 [ 31.360715] rcu_core+0x8c8/0x2860 [ 31.361166] __do_softirq+0x1b7/0x7d4 [ 31.361665] [ 31.361884] Last potentially related work creation: [ 31.362496] kasan_save_stack+0x22/0x50 [ 31.363008] __kasan_record_aux_stack+0x8e/0xa0 [ 31.363595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.364238] remove_vma+0x139/0x170 [ 31.364721] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.365280] do_vmi_munmap+0x1f1/0x2b0 [ 31.365781] __vm_munmap+0x138/0x3a0 [ 31.366265] __x64_sys_munmap+0x59/0x80 [ 31.366776] do_syscall_64+0x3f/0x90 [ 31.367252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.367905] [ 31.368120] The buggy address belongs to the object at ffff888019313828 [ 31.368120] which belongs to the cache vm_area_struct of size 168 [ 31.369632] The buggy address is located 88 bytes inside of [ 31.369632] freed 168-byte region [ffff888019313828, ffff8880193138d0) [ 31.371062] [ 31.371285] The buggy address belongs to the physical page: [ 31.371955] page:000000002215b225 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19313 [ 31.373079] memcg:ffff88800d4a0e01 [ 31.373523] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.374190] page_type: 0xffffffff() [ 31.374657] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.375585] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4a0e01 [ 31.376523] page dumped because: kasan: bad access detected [ 31.377193] [ 31.377436] Memory state around the buggy address: [ 31.378036] ffff888019313780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.378913] ffff888019313800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.379787] >ffff888019313880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.380673] ^ [ 31.381090] ffff888019313900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.381964] ffff888019313980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.382836] ================================================================== [ 31.384384] Disabling lock debugging due to kernel taint [ 33.997168] BUG: Bad rss-counter state mm:00000000ae9270e2 type:MM_FILEPAGES val:33 [ 33.998194] BUG: Bad rss-counter state mm:00000000ae9270e2 type:MM_ANONPAGES val:22 [ 34.549651] BUG: Bad rss-counter state mm:00000000ad262cb8 type:MM_FILEPAGES val:33 [ 34.550835] BUG: Bad rss-counter state mm:00000000ad262cb8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19919' (ECDSA) to the list of known hosts. 2023/06/21 05:16:41 fuzzer started 2023/06/21 05:16:41 dialing manager at localhost:36067 2023/06/21 05:16:41 checking machine... 2023/06/21 05:16:41 checking revisions... [ 35.202439] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:16:42 testing simple program... [ 35.259649] cgroup: Unknown subsys name 'net' [ 35.320420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:16:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fbae9e631c8 CR3=000000000d676000 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=d4b28a778752c5862341cab1b2b4e303 XMM02=000000000011d258d59e07bde36eea69 XMM03=000000000011d380ec2efd57dc4c00df XMM04=4429f7150dcbac2500000000000ae988 XMM05=7bf79f04887bc3040000000000132738 XMM06=1e39bdf5eb3a42a300000000001317e0 XMM07=fb795ef6d65770560000000000121a48 XMM08=2c67c8bc2e329bc3000000000011d380 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=1ffff1100322cfb4 RCX=0000000000000007 RDX=0000000000000000 RSI=ffffffff8186d3a2 RDI=ffffffff85ba4c48 RBP=ffffffff85ba4c48 RSP=ffff888019167d88 R8 =ffffffff84d2fb80 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=0000000000000002 R13=ffff888018dcd140 R14=ffffffff84d2fb80 R15=ffffffff85ba4c48 RIP=ffffffff844d928d RFL=00000202 [-------] 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 00007f7d95a96900 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=00007f7d9604e0b0 CR3=000000001c544000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000