syzkaller login: [ 31.076819] BUG: Bad rss-counter state mm:0000000076682365 type:MM_FILEPAGES val:33 [ 31.077841] BUG: Bad rss-counter state mm:0000000076682365 type:MM_ANONPAGES val:22 [ 31.236150] ================================================================== [ 31.237190] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.238147] Read of size 8 at addr ffff88800fcff4e0 by task sshd/220 [ 31.239028] [ 31.239253] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.240154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.241159] Call Trace: [ 31.241492] [ 31.241788] dump_stack_lvl+0x91/0xf0 [ 31.242300] print_report+0xcc/0x620 [ 31.242802] ? __virt_addr_valid+0x102/0x340 [ 31.243370] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244037] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244661] kasan_report+0xbe/0xf0 [ 31.245153] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.245792] vma_interval_tree_remove+0xc75/0xec0 [ 31.246414] vma_prepare+0xc54/0x11a0 [ 31.246904] __split_vma+0x5af/0x950 [ 31.247387] ? __pfx___split_vma+0x10/0x10 [ 31.247955] ? find_held_lock+0x2c/0x110 [ 31.248492] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.249063] ? lock_is_held_type+0x9f/0x120 [ 31.249617] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.250242] ? mtree_range_walk+0x632/0x900 [ 31.250803] ? mas_walk+0x5c7/0x7c0 [ 31.251279] do_vmi_munmap+0x1f1/0x2b0 [ 31.251791] mmap_region+0x1f9/0x2660 [ 31.252290] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.252820] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.253544] ? __pfx_lock_acquire+0x10/0x10 [ 31.254095] ? __pfx_mmap_region+0x10/0x10 [ 31.254632] ? security_mmap_addr+0x7d/0xa0 [ 31.255166] ? get_unmapped_area+0x1f5/0x3f0 [ 31.255731] do_mmap+0x854/0xf00 [ 31.256204] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.256702] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.257283] ksys_mmap_pgoff+0x3af/0x500 [ 31.257796] do_syscall_64+0x3f/0x90 [ 31.258279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.258942] RIP: 0033:0x7f6255c54d82 [ 31.259408] 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 [ 31.261561] RSP: 002b:00007fff12687c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.262472] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6255c54d82 [ 31.263328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f625508e000 [ 31.264196] RBP: 00007f625508e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.265048] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de572b6ec0 [ 31.265911] R13: 00007fff12687c70 R14: 00007fff12687ca0 R15: 00007fff12688000 [ 31.266776] [ 31.267073] [ 31.267291] Allocated by task 213: [ 31.267730] kasan_save_stack+0x22/0x50 [ 31.268251] kasan_set_track+0x25/0x30 [ 31.268754] __kasan_slab_alloc+0x59/0x70 [ 31.269281] kmem_cache_alloc+0x16b/0x370 [ 31.269811] vm_area_dup+0x20/0x160 [ 31.270277] __split_vma+0x170/0x950 [ 31.270746] split_vma+0xc6/0x110 [ 31.271191] mprotect_fixup+0x8d2/0xb30 [ 31.271693] do_mprotect_pkey+0x87e/0xd40 [ 31.272228] __x64_sys_mprotect+0x78/0xc0 [ 31.272758] do_syscall_64+0x3f/0x90 [ 31.273249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.273912] [ 31.274132] Freed by task 213: [ 31.274531] kasan_save_stack+0x22/0x50 [ 31.275037] kasan_set_track+0x25/0x30 [ 31.275541] kasan_save_free_info+0x2b/0x50 [ 31.276093] __kasan_slab_free+0x10a/0x190 [ 31.276632] kmem_cache_free+0x10d/0x4d0 [ 31.277150] rcu_core+0x8c8/0x2860 [ 31.277596] __do_softirq+0x1b7/0x7d4 [ 31.278086] [ 31.278301] Last potentially related work creation: [ 31.278895] kasan_save_stack+0x22/0x50 [ 31.279409] __kasan_record_aux_stack+0x8e/0xa0 [ 31.280002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.280654] remove_vma+0x139/0x170 [ 31.281116] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.281683] do_vmi_munmap+0x1f1/0x2b0 [ 31.282178] __vm_munmap+0x138/0x3a0 [ 31.282653] __x64_sys_munmap+0x59/0x80 [ 31.283152] do_syscall_64+0x3f/0x90 [ 31.283638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.284291] [ 31.284511] The buggy address belongs to the object at ffff88800fcff488 [ 31.284511] which belongs to the cache vm_area_struct of size 168 [ 31.285970] The buggy address is located 88 bytes inside of [ 31.285970] freed 168-byte region [ffff88800fcff488, ffff88800fcff530) [ 31.287385] [ 31.287607] The buggy address belongs to the physical page: [ 31.288284] page:00000000acaca81d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcff [ 31.289378] memcg:ffff88800dea4f01 [ 31.289816] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.290468] page_type: 0xffffffff() [ 31.290926] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.291854] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dea4f01 [ 31.292763] page dumped because: kasan: bad access detected [ 31.293426] [ 31.293647] Memory state around the buggy address: [ 31.294233] ffff88800fcff380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.295087] ffff88800fcff400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.295971] >ffff88800fcff480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.296822] ^ [ 31.297585] ffff88800fcff500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.298448] ffff88800fcff580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.299304] ================================================================== [ 31.300285] Disabling lock debugging due to kernel taint [ 33.091367] BUG: Bad rss-counter state mm:0000000091405f47 type:MM_FILEPAGES val:33 [ 33.092537] BUG: Bad rss-counter state mm:0000000091405f47 type:MM_ANONPAGES val:22 [ 33.484939] BUG: Bad rss-counter state mm:00000000f8a4cda4 type:MM_FILEPAGES val:33 [ 33.485901] BUG: Bad rss-counter state mm:00000000f8a4cda4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23443' (ECDSA) to the list of known hosts. 2023/06/20 14:35:01 fuzzer started 2023/06/20 14:35:01 dialing manager at localhost:36067 2023/06/20 14:35:01 checking machine... 2023/06/20 14:35:01 checking revisions... [ 34.100590] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:35:01 testing simple program... [ 34.151017] cgroup: Unknown subsys name 'net' [ 34.211779] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:35:01 Registers: info registers vcpu 0 RAX=1ffffffff0bb7aff RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88800f86f1d8 R8 =ffffffff860d8256 R9 =ffff88800f86f2d0 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fa33ab66900 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=00007ffd31ef8000 CR3=000000000e68e000 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=00007fcb0ba23080 CR3=0000000016fd8000 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=2031303a35333a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a35333a3431203032 XMM08=7020303d64696720303d64697520612f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000