syzkaller login: [ 29.059181] BUG: Bad rss-counter state mm:00000000b5c65339 type:MM_FILEPAGES val:33 [ 29.060434] BUG: Bad rss-counter state mm:00000000b5c65339 type:MM_ANONPAGES val:22 [ 29.232594] ================================================================== [ 29.233493] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.234419] Read of size 8 at addr ffff888019f8e968 by task sshd/222 [ 29.235379] [ 29.235598] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.236465] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.237450] Call Trace: [ 29.237769] [ 29.238047] dump_stack_lvl+0x91/0xf0 [ 29.238532] print_report+0xcc/0x620 [ 29.239011] ? __virt_addr_valid+0x102/0x340 [ 29.239549] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.240153] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.240798] kasan_report+0xbe/0xf0 [ 29.241269] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.241883] vma_interval_tree_remove+0xc75/0xec0 [ 29.242483] vma_prepare+0xc54/0x11a0 [ 29.242959] __split_vma+0x5af/0x950 [ 29.243424] ? __pfx___split_vma+0x10/0x10 [ 29.243942] ? find_held_lock+0x2c/0x110 [ 29.244462] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.245025] ? lock_is_held_type+0x9f/0x120 [ 29.245555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.246169] ? mtree_range_walk+0x632/0x900 [ 29.246710] ? mas_walk+0x5c7/0x7c0 [ 29.247181] do_vmi_munmap+0x1f1/0x2b0 [ 29.247665] mmap_region+0x1f9/0x2660 [ 29.248138] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.248655] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.249355] ? __pfx_lock_acquire+0x10/0x10 [ 29.249880] ? __pfx_mmap_region+0x10/0x10 [ 29.250399] ? security_mmap_addr+0x7d/0xa0 [ 29.250922] ? get_unmapped_area+0x1f5/0x3f0 [ 29.251465] do_mmap+0x854/0xf00 [ 29.251909] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.252411] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.252967] ksys_mmap_pgoff+0x3af/0x500 [ 29.253472] do_syscall_64+0x3f/0x90 [ 29.253947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.254579] RIP: 0033:0x7fd4e48b7d82 [ 29.255033] 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 [ 29.257141] RSP: 002b:00007ffdde8cc378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.258033] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4e48b7d82 [ 29.258874] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4e3cf1000 [ 29.259712] RBP: 00007fd4e3cf1000 R08: 0000000000000009 R09: 0000000000001000 [ 29.260558] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559364526ec0 [ 29.261400] R13: 00007ffdde8cc390 R14: 00007ffdde8cc3c0 R15: 00007ffdde8cc720 [ 29.262258] [ 29.262547] [ 29.262765] Allocated by task 214: [ 29.263192] kasan_save_stack+0x22/0x50 [ 29.263692] kasan_set_track+0x25/0x30 [ 29.264188] __kasan_slab_alloc+0x59/0x70 [ 29.264721] kmem_cache_alloc+0x16b/0x370 [ 29.265230] vm_area_dup+0x20/0x160 [ 29.265681] __split_vma+0x170/0x950 [ 29.266147] split_vma+0xc6/0x110 [ 29.266583] mprotect_fixup+0x8d2/0xb30 [ 29.267082] do_mprotect_pkey+0x87e/0xd40 [ 29.267604] __x64_sys_mprotect+0x78/0xc0 [ 29.268122] do_syscall_64+0x3f/0x90 [ 29.268602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.269230] [ 29.269442] Freed by task 13: [ 29.269817] kasan_save_stack+0x22/0x50 [ 29.270319] kasan_set_track+0x25/0x30 [ 29.270805] kasan_save_free_info+0x2b/0x50 [ 29.271325] __kasan_slab_free+0x10a/0x190 [ 29.271844] kmem_cache_free+0x10d/0x4d0 [ 29.272369] rcu_core+0x8c8/0x2860 [ 29.272806] __do_softirq+0x1b7/0x7d4 [ 29.273278] [ 29.273495] Last potentially related work creation: [ 29.274077] kasan_save_stack+0x22/0x50 [ 29.274570] __kasan_record_aux_stack+0x8e/0xa0 [ 29.275145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.275779] remove_vma+0x139/0x170 [ 29.276324] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.276879] do_vmi_munmap+0x1f1/0x2b0 [ 29.277363] __vm_munmap+0x138/0x3a0 [ 29.277823] __x64_sys_munmap+0x59/0x80 [ 29.278313] do_syscall_64+0x3f/0x90 [ 29.278780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.279413] [ 29.279625] The buggy address belongs to the object at ffff888019f8e910 [ 29.279625] which belongs to the cache vm_area_struct of size 168 [ 29.281077] The buggy address is located 88 bytes inside of [ 29.281077] freed 168-byte region [ffff888019f8e910, ffff888019f8e9b8) [ 29.282459] [ 29.282674] The buggy address belongs to the physical page: [ 29.283326] page:00000000c2443276 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f8e [ 29.284425] memcg:ffff888016b55701 [ 29.284846] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.285484] page_type: 0xffffffff() [ 29.285925] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.286824] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b55701 [ 29.287711] page dumped because: kasan: bad access detected [ 29.288372] [ 29.288585] Memory state around the buggy address: [ 29.289152] ffff888019f8e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.289988] ffff888019f8e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.290837] >ffff888019f8e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.291677] ^ [ 29.292459] ffff888019f8e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.293298] ffff888019f8ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.294144] ================================================================== [ 29.295075] Disabling lock debugging due to kernel taint [ 31.527272] BUG: Bad rss-counter state mm:000000004287aa9c type:MM_FILEPAGES val:33 [ 31.528333] BUG: Bad rss-counter state mm:000000004287aa9c type:MM_ANONPAGES val:22 [ 32.011889] BUG: Bad rss-counter state mm:0000000058750cb5 type:MM_FILEPAGES val:33 [ 32.012951] BUG: Bad rss-counter state mm:0000000058750cb5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54224' (ECDSA) to the list of known hosts. 2023/06/19 20:57:04 fuzzer started 2023/06/19 20:57:04 dialing manager at localhost:44161 2023/06/19 20:57:04 checking machine... 2023/06/19 20:57:04 checking revisions... [ 32.705101] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:57:05 testing simple program... [ 32.747036] cgroup: Unknown subsys name 'net' [ 32.795526] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:57:04 Registers: info registers vcpu 0 RAX=ffffffff85d978ac RBX=ffffffff85d97898 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff8609fada RDI=ffffffff85d97888 RBP=ffffffff85d9789c RSP=ffff88806ce099e0 R8 =ffffffff8609fada R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d978ac R13=ffffffff85d97888 R14=ffffffff85d97898 R15=dffffc0000000000 RIP=ffffffff8112fc5a 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 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=00007f4f4c9734d0 CR3=000000000f70e000 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=2034303a37353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a37353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8609675b RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801010f6f0 RSP=ffff88801010f5d8 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88801010f6f8 R13=ffff88801010f6e0 R14=ffff88801010f6d9 R15=ffff88801010f698 RIP=ffffffff81130abf 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 00007f95b530e900 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=00007f95b52ed020 CR3=000000000f506000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000