syzkaller login: [ 31.068110] BUG: Bad rss-counter state mm:0000000075bc3285 type:MM_FILEPAGES val:33 [ 31.069453] BUG: Bad rss-counter state mm:0000000075bc3285 type:MM_ANONPAGES val:22 [ 31.233581] ================================================================== [ 31.234491] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.235422] Read of size 8 at addr ffff88800d9694e0 by task sshd/220 [ 31.236182] [ 31.236403] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.237454] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.238448] Call Trace: [ 31.238767] [ 31.239066] dump_stack_lvl+0x91/0xf0 [ 31.239557] print_report+0xcc/0x620 [ 31.240102] ? __virt_addr_valid+0x102/0x340 [ 31.240746] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.241399] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242154] kasan_report+0xbe/0xf0 [ 31.242723] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243435] vma_interval_tree_remove+0xc75/0xec0 [ 31.244190] vma_prepare+0xc54/0x11a0 [ 31.244794] __split_vma+0x5af/0x950 [ 31.245374] ? __pfx___split_vma+0x10/0x10 [ 31.246035] ? find_held_lock+0x2c/0x110 [ 31.246686] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.247371] ? lock_is_held_type+0x9f/0x120 [ 31.248028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.248764] ? mtree_range_walk+0x632/0x900 [ 31.249449] ? mas_walk+0x5c7/0x7c0 [ 31.250047] do_vmi_munmap+0x1f1/0x2b0 [ 31.250644] mmap_region+0x1f9/0x2660 [ 31.251225] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.251857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.252738] ? __pfx_lock_acquire+0x10/0x10 [ 31.253393] ? __pfx_mmap_region+0x10/0x10 [ 31.254064] ? security_mmap_addr+0x7d/0xa0 [ 31.254715] ? get_unmapped_area+0x1f5/0x3f0 [ 31.255376] do_mmap+0x854/0xf00 [ 31.255909] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.256514] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.257191] ksys_mmap_pgoff+0x3af/0x500 [ 31.257813] do_syscall_64+0x3f/0x90 [ 31.258403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.259194] RIP: 0033:0x7f9dbebb8d82 [ 31.259751] 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 [ 31.262395] RSP: 002b:00007ffee602dde8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.263521] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9dbebb8d82 [ 31.264569] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9dbdff2000 [ 31.265635] RBP: 00007f9dbdff2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.266468] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600395b3ec0 [ 31.267297] R13: 00007ffee602de00 R14: 00007ffee602de30 R15: 00007ffee602e190 [ 31.268144] [ 31.268442] [ 31.268662] Allocated by task 213: [ 31.269120] kasan_save_stack+0x22/0x50 [ 31.269656] kasan_set_track+0x25/0x30 [ 31.270142] __kasan_slab_alloc+0x59/0x70 [ 31.270658] kmem_cache_alloc+0x16b/0x370 [ 31.271177] vm_area_dup+0x20/0x160 [ 31.271633] __split_vma+0x170/0x950 [ 31.272094] split_vma+0xc6/0x110 [ 31.272517] mprotect_fixup+0x8d2/0xb30 [ 31.273005] do_mprotect_pkey+0x87e/0xd40 [ 31.273549] __x64_sys_mprotect+0x78/0xc0 [ 31.274104] do_syscall_64+0x3f/0x90 [ 31.274585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275239] [ 31.275458] Freed by task 213: [ 31.275871] kasan_save_stack+0x22/0x50 [ 31.276383] kasan_set_track+0x25/0x30 [ 31.276879] kasan_save_free_info+0x2b/0x50 [ 31.277406] __kasan_slab_free+0x10a/0x190 [ 31.278076] kmem_cache_free+0x10d/0x4d0 [ 31.278604] rcu_core+0x8c8/0x2860 [ 31.279044] __do_softirq+0x1b7/0x7d4 [ 31.279518] [ 31.279731] Last potentially related work creation: [ 31.280309] kasan_save_stack+0x22/0x50 [ 31.280808] __kasan_record_aux_stack+0x8e/0xa0 [ 31.281375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.282034] remove_vma+0x139/0x170 [ 31.282484] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.283055] do_vmi_munmap+0x1f1/0x2b0 [ 31.283550] __vm_munmap+0x138/0x3a0 [ 31.284014] __x64_sys_munmap+0x59/0x80 [ 31.284509] do_syscall_64+0x3f/0x90 [ 31.284994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285643] [ 31.285858] The buggy address belongs to the object at ffff88800d969488 [ 31.285858] which belongs to the cache vm_area_struct of size 168 [ 31.287325] The buggy address is located 88 bytes inside of [ 31.287325] freed 168-byte region [ffff88800d969488, ffff88800d969530) [ 31.288727] [ 31.288943] The buggy address belongs to the physical page: [ 31.289613] page:000000008082ea2c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd969 [ 31.290691] memcg:ffff888014360501 [ 31.291116] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.291789] page_type: 0xffffffff() [ 31.292256] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.293176] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014360501 [ 31.294100] page dumped because: kasan: bad access detected [ 31.294762] [ 31.294976] Memory state around the buggy address: [ 31.295559] ffff88800d969380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.296419] ffff88800d969400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.297282] >ffff88800d969480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.298190] ^ [ 31.298954] ffff88800d969500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.299806] ffff88800d969580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.300653] ================================================================== [ 31.301618] Disabling lock debugging due to kernel taint [ 33.361885] BUG: Bad rss-counter state mm:000000005cf8e1f6 type:MM_FILEPAGES val:33 [ 33.362893] BUG: Bad rss-counter state mm:000000005cf8e1f6 type:MM_ANONPAGES val:22 [ 33.895862] BUG: Bad rss-counter state mm:0000000081d95982 type:MM_FILEPAGES val:33 [ 33.896792] BUG: Bad rss-counter state mm:0000000081d95982 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13146' (ECDSA) to the list of known hosts. 2023/06/21 10:36:46 fuzzer started 2023/06/21 10:36:46 dialing manager at localhost:36067 2023/06/21 10:36:46 checking machine... 2023/06/21 10:36:46 checking revisions... [ 34.597768] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:36:46 testing simple program... [ 34.656470] cgroup: Unknown subsys name 'net' [ 34.728430] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:36:46 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=00007f2d555daa80 CR3=00000000158da000 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=2035343a36333a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a36333a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801610c220 RCX=ffff88801610c000 RDX=0000000000000080 RSI=ffff88801610c130 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88806cf09da0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffff88800844f780 R13=ffffea00005ab500 R14=ffffffff818d9c06 R15=ffff88800da12b00 RIP=ffffffff8180eff0 RFL=00000282 [--S----] 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 00007fb6875c1900 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=00007fffa2b8c000 CR3=000000000e156000 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