syzkaller login: [ 34.203147] BUG: Bad rss-counter state mm:0000000046965cef type:MM_FILEPAGES val:33 [ 34.204806] BUG: Bad rss-counter state mm:0000000046965cef type:MM_ANONPAGES val:22 [ 34.372337] ================================================================== [ 34.373419] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.374701] Read of size 8 at addr ffff88800f01ca50 by task sshd/219 [ 34.375661] [ 34.375920] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.377004] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.378022] Call Trace: [ 34.378367] <TASK> [ 34.378709] dump_stack_lvl+0x91/0xf0 [ 34.379323] print_report+0xcc/0x620 [ 34.379929] ? __virt_addr_valid+0x102/0x340 [ 34.380595] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.381354] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.382111] kasan_report+0xbe/0xf0 [ 34.382701] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.383475] vma_interval_tree_remove+0xc75/0xec0 [ 34.384233] vma_prepare+0xc54/0x11a0 [ 34.384831] __split_vma+0x5af/0x950 [ 34.385403] ? __pfx___split_vma+0x10/0x10 [ 34.386058] ? find_held_lock+0x2c/0x110 [ 34.386728] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.387425] ? lock_is_held_type+0x9f/0x120 [ 34.388008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.388637] ? mtree_range_walk+0x632/0x900 [ 34.389259] ? mas_walk+0x5c7/0x7c0 [ 34.389768] do_vmi_munmap+0x1f1/0x2b0 [ 34.390316] mmap_region+0x1f9/0x2660 [ 34.390845] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.391542] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.392333] ? __pfx_lock_acquire+0x10/0x10 [ 34.392891] ? __pfx_mmap_region+0x10/0x10 [ 34.393434] ? security_mmap_addr+0x7d/0xa0 [ 34.394000] ? get_unmapped_area+0x1f5/0x3f0 [ 34.394590] do_mmap+0x854/0xf00 [ 34.395054] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.395553] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.396138] ksys_mmap_pgoff+0x3af/0x500 [ 34.396656] do_syscall_64+0x3f/0x90 [ 34.397153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.397840] RIP: 0033:0x7fcf07a9cd82 [ 34.398334] 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 [ 34.400539] RSP: 002b:00007ffcbf0ddbb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.401472] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf07a9cd82 [ 34.402360] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf06ed6000 [ 34.403233] RBP: 00007fcf06ed6000 R08: 0000000000000009 R09: 0000000000001000 [ 34.404111] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559bbfa19f60 [ 34.404994] R13: 00007ffcbf0ddbd0 R14: 00007ffcbf0ddc00 R15: 00007ffcbf0ddf60 [ 34.405899] </TASK> [ 34.406195] [ 34.406452] Allocated by task 212: [ 34.406905] kasan_save_stack+0x22/0x50 [ 34.407425] kasan_set_track+0x25/0x30 [ 34.407943] __kasan_slab_alloc+0x59/0x70 [ 34.408489] kmem_cache_alloc+0x16b/0x370 [ 34.409027] vm_area_dup+0x20/0x160 [ 34.409490] __split_vma+0x170/0x950 [ 34.409991] split_vma+0xc6/0x110 [ 34.410458] mprotect_fixup+0x8d2/0xb30 [ 34.410984] do_mprotect_pkey+0x87e/0xd40 [ 34.411512] __x64_sys_mprotect+0x78/0xc0 [ 34.412059] do_syscall_64+0x3f/0x90 [ 34.412544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.413200] [ 34.413418] Freed by task 212: [ 34.413838] kasan_save_stack+0x22/0x50 [ 34.414364] kasan_set_track+0x25/0x30 [ 34.414880] kasan_save_free_info+0x2b/0x50 [ 34.415494] __kasan_slab_free+0x10a/0x190 [ 34.416058] kmem_cache_free+0x10d/0x4d0 [ 34.416569] rcu_core+0x8c8/0x2860 [ 34.417037] __do_softirq+0x1b7/0x7d4 [ 34.417517] [ 34.417743] Last potentially related work creation: [ 34.418366] kasan_save_stack+0x22/0x50 [ 34.418900] __kasan_record_aux_stack+0x8e/0xa0 [ 34.419475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.420144] remove_vma+0x139/0x170 [ 34.420606] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.421189] do_vmi_munmap+0x1f1/0x2b0 [ 34.421684] __vm_munmap+0x138/0x3a0 [ 34.422185] __x64_sys_munmap+0x59/0x80 [ 34.422697] do_syscall_64+0x3f/0x90 [ 34.423191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.423852] [ 34.424072] The buggy address belongs to the object at ffff88800f01c9f8 [ 34.424072] which belongs to the cache vm_area_struct of size 168 [ 34.425576] The buggy address is located 88 bytes inside of [ 34.425576] freed 168-byte region [ffff88800f01c9f8, ffff88800f01caa0) [ 34.427058] [ 34.427279] The buggy address belongs to the physical page: [ 34.427955] page:0000000000411b6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf01c [ 34.429076] memcg:ffff888019616701 [ 34.429514] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.430192] page_type: 0xffffffff() [ 34.430664] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.431605] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019616701 [ 34.432529] page dumped because: kasan: bad access detected [ 34.433211] [ 34.433428] Memory state around the buggy address: [ 34.434039] ffff88800f01c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.434937] ffff88800f01c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.435809] >ffff88800f01ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.436681] ^ [ 34.437410] ffff88800f01ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.438300] ffff88800f01cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.439182] ================================================================== [ 34.440169] Disabling lock debugging due to kernel taint [ 36.449819] BUG: Bad rss-counter state mm:000000006c80adf8 type:MM_FILEPAGES val:33 [ 36.451050] BUG: Bad rss-counter state mm:000000006c80adf8 type:MM_ANONPAGES val:22 [ 36.895111] BUG: Bad rss-counter state mm:000000003a092408 type:MM_FILEPAGES val:33 [ 36.896911] BUG: Bad rss-counter state mm:000000003a092408 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45355' (ECDSA) to the list of known hosts. 2023/06/20 05:50:59 fuzzer started 2023/06/20 05:50:59 dialing manager at localhost:44161 2023/06/20 05:50:59 checking machine... 2023/06/20 05:50:59 checking revisions... [ 37.614583] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:50:59 testing simple program... [ 37.653179] cgroup: Unknown subsys name 'net' [ 37.690863] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:50:56 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=ffff888008c58000 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=00007f23e1424530 CR3=000000000e640000 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=2039353a30353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a30353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff864bb02e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b17 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 00007fd710bfd900 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=00007ffdd2463000 CR3=0000000015e58000 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=563412feff00545000000000000080fe 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