syzkaller login: [ 30.900798] BUG: Bad rss-counter state mm:0000000046272822 type:MM_FILEPAGES val:33 [ 30.901499] BUG: Bad rss-counter state mm:0000000046272822 type:MM_ANONPAGES val:22 [ 31.018565] ================================================================== [ 31.019174] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.019764] Read of size 8 at addr ffff888018d44140 by task sshd/220 [ 31.020305] [ 31.020449] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.021017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.021647] Call Trace: [ 31.021857] [ 31.022045] dump_stack_lvl+0x91/0xf0 [ 31.022364] print_report+0xcc/0x620 [ 31.022815] ? __virt_addr_valid+0x102/0x340 [ 31.023250] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.023665] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.024103] kasan_report+0xbe/0xf0 [ 31.024387] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.024760] vma_interval_tree_remove+0xc75/0xec0 [ 31.025167] vma_prepare+0xc54/0x11a0 [ 31.025497] __split_vma+0x5af/0x950 [ 31.025818] ? __pfx___split_vma+0x10/0x10 [ 31.026171] ? find_held_lock+0x2c/0x110 [ 31.026519] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.026873] ? lock_is_held_type+0x9f/0x120 [ 31.027220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.027599] ? mtree_range_walk+0x632/0x900 [ 31.027944] ? mas_walk+0x5c7/0x7c0 [ 31.028302] do_vmi_munmap+0x1f1/0x2b0 [ 31.028617] mmap_region+0x1f9/0x2660 [ 31.028936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.029285] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.029760] ? __pfx_lock_acquire+0x10/0x10 [ 31.030098] ? __pfx_mmap_region+0x10/0x10 [ 31.030418] ? security_mmap_addr+0x7d/0xa0 [ 31.030744] ? get_unmapped_area+0x1f5/0x3f0 [ 31.031095] do_mmap+0x854/0xf00 [ 31.031398] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.031733] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.032138] ksys_mmap_pgoff+0x3af/0x500 [ 31.032466] do_syscall_64+0x3f/0x90 [ 31.032765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.033164] RIP: 0033:0x7fd308a3bd82 [ 31.033452] 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 [ 31.034718] RSP: 002b:00007ffcc999f2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.035265] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd308a3bd82 [ 31.035770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd307e75000 [ 31.036322] RBP: 00007fd307e75000 R08: 0000000000000009 R09: 0000000000001000 [ 31.036834] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb4d2e9b20 [ 31.037347] R13: 00007ffcc999f310 R14: 00007ffcc999f340 R15: 00007ffcc999f6a0 [ 31.037860] [ 31.038040] [ 31.038170] Allocated by task 213: [ 31.038436] kasan_save_stack+0x22/0x50 [ 31.038747] kasan_set_track+0x25/0x30 [ 31.039051] __kasan_slab_alloc+0x59/0x70 [ 31.039387] kmem_cache_alloc+0x16b/0x370 [ 31.039706] vm_area_dup+0x20/0x160 [ 31.040036] __split_vma+0x170/0x950 [ 31.040354] split_vma+0xc6/0x110 [ 31.040629] mprotect_fixup+0x8d2/0xb30 [ 31.040935] do_mprotect_pkey+0x87e/0xd40 [ 31.041252] __x64_sys_mprotect+0x78/0xc0 [ 31.041571] do_syscall_64+0x3f/0x90 [ 31.041868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.042270] [ 31.042401] Freed by task 213: [ 31.042646] kasan_save_stack+0x22/0x50 [ 31.042952] kasan_set_track+0x25/0x30 [ 31.043260] kasan_save_free_info+0x2b/0x50 [ 31.043581] __kasan_slab_free+0x10a/0x190 [ 31.043919] kmem_cache_free+0x10d/0x4d0 [ 31.044285] rcu_core+0x8c8/0x2860 [ 31.044549] __do_softirq+0x1b7/0x7d4 [ 31.044860] [ 31.045003] Last potentially related work creation: [ 31.045381] kasan_save_stack+0x22/0x50 [ 31.045688] __kasan_record_aux_stack+0x8e/0xa0 [ 31.046023] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.046398] remove_vma+0x139/0x170 [ 31.046673] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.047108] do_vmi_munmap+0x1f1/0x2b0 [ 31.047403] __vm_munmap+0x138/0x3a0 [ 31.047705] __x64_sys_munmap+0x59/0x80 [ 31.048063] do_syscall_64+0x3f/0x90 [ 31.048380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048810] [ 31.048953] The buggy address belongs to the object at ffff888018d440e8 [ 31.048953] which belongs to the cache vm_area_struct of size 168 [ 31.049969] The buggy address is located 88 bytes inside of [ 31.049969] freed 168-byte region [ffff888018d440e8, ffff888018d44190) [ 31.050965] [ 31.051127] The buggy address belongs to the physical page: [ 31.051524] page:000000008525c609 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d44 [ 31.052249] memcg:ffff88800c443701 [ 31.052518] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.052931] page_type: 0xffffffff() [ 31.053213] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.053768] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c443701 [ 31.054312] page dumped because: kasan: bad access detected [ 31.054787] [ 31.054954] Memory state around the buggy address: [ 31.055316] ffff888018d44000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.055820] ffff888018d44080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.056380] >ffff888018d44100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.056953] ^ [ 31.057367] ffff888018d44180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.058001] ffff888018d44200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.058685] ================================================================== [ 31.059447] Disabling lock debugging due to kernel taint [ 32.609084] BUG: Bad rss-counter state mm:000000002c659016 type:MM_FILEPAGES val:33 [ 32.609799] BUG: Bad rss-counter state mm:000000002c659016 type:MM_ANONPAGES val:22 [ 32.973967] BUG: Bad rss-counter state mm:000000008ffb8a6b type:MM_FILEPAGES val:33 [ 32.974640] BUG: Bad rss-counter state mm:000000008ffb8a6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58681' (ECDSA) to the list of known hosts. 2023/06/21 08:40:56 fuzzer started 2023/06/21 08:40:56 dialing manager at localhost:36067 2023/06/21 08:40:56 checking machine... 2023/06/21 08:40:56 checking revisions... [ 33.530758] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:40:56 testing simple program... [ 33.585185] cgroup: Unknown subsys name 'net' [ 33.643743] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:40:56 Registers: info registers vcpu 0 RAX=0000000000000300 RBX=1ffff11003381f16 RCX=ffffffff83741bc6 RDX=ffff888015f33680 RSI=0000000000000000 RDI=0000000000000003 RBP=ffff88800ff29200 RSP=ffff888019c0f888 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000300 R11=00000000000b6a61 R12=0000000000000006 R13=ffff88800f1173d8 R14=ffff88800f1173c0 R15=0000000000000002 RIP=ffffffff814c0860 RFL=00000206 [-----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 00007ff3f223e900 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=00007ffe298d0000 CR3=000000001bf44000 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=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 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=ffff888008c04400 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=00007f0f35476fe0 CR3=000000000c732000 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=2035353a30343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30343a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000