syzkaller login: [ 30.250708] BUG: Bad rss-counter state mm:00000000029f7d67 type:MM_FILEPAGES val:33 [ 30.251463] BUG: Bad rss-counter state mm:00000000029f7d67 type:MM_ANONPAGES val:22 [ 30.279715] ================================================================== [ 30.280405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.281118] Read of size 8 at addr ffff8880099d4ed8 by task sshd/220 [ 30.281743] [ 30.281924] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.282613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.283372] Call Trace: [ 30.283708] <TASK> [ 30.283946] dump_stack_lvl+0x91/0xf0 [ 30.284318] print_report+0xcc/0x620 [ 30.284683] ? __virt_addr_valid+0x102/0x340 [ 30.285099] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.285563] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.286055] kasan_report+0xbe/0xf0 [ 30.286413] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.286869] vma_interval_tree_remove+0xc75/0xec0 [ 30.287311] vma_prepare+0xc54/0x11a0 [ 30.287674] __split_vma+0x5af/0x950 [ 30.288032] ? __pfx___split_vma+0x10/0x10 [ 30.288435] ? find_held_lock+0x2c/0x110 [ 30.288829] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.289256] ? lock_is_held_type+0x9f/0x120 [ 30.289663] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.290110] ? mtree_range_walk+0x632/0x900 [ 30.290431] ? mas_walk+0x5c7/0x7c0 [ 30.290707] do_vmi_munmap+0x1f1/0x2b0 [ 30.290991] mmap_region+0x1f9/0x2660 [ 30.291262] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.291560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.291979] ? __pfx_lock_acquire+0x10/0x10 [ 30.292291] ? __pfx_mmap_region+0x10/0x10 [ 30.292604] ? security_mmap_addr+0x7d/0xa0 [ 30.292916] ? get_unmapped_area+0x1f5/0x3f0 [ 30.293236] do_mmap+0x854/0xf00 [ 30.293497] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.293789] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.294126] ksys_mmap_pgoff+0x3af/0x500 [ 30.294421] do_syscall_64+0x3f/0x90 [ 30.294698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.295080] RIP: 0033:0x7fb73f12fd82 [ 30.295342] 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 [ 30.296606] RSP: 002b:00007fff4df48888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.297137] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb73f12fd82 [ 30.297633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb73e569000 [ 30.298142] RBP: 00007fb73e569000 R08: 0000000000000009 R09: 0000000000001000 [ 30.298648] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db91542ec0 [ 30.299139] R13: 00007fff4df488a0 R14: 00007fff4df488d0 R15: 00007fff4df48c30 [ 30.299643] </TASK> [ 30.299814] [ 30.299941] Allocated by task 213: [ 30.300195] kasan_save_stack+0x22/0x50 [ 30.300486] kasan_set_track+0x25/0x30 [ 30.300773] __kasan_slab_alloc+0x59/0x70 [ 30.301077] kmem_cache_alloc+0x16b/0x370 [ 30.301376] vm_area_dup+0x20/0x160 [ 30.301645] __split_vma+0x170/0x950 [ 30.301929] split_vma+0xc6/0x110 [ 30.302185] mprotect_fixup+0x8d2/0xb30 [ 30.302475] do_mprotect_pkey+0x87e/0xd40 [ 30.302775] __x64_sys_mprotect+0x78/0xc0 [ 30.303072] do_syscall_64+0x3f/0x90 [ 30.303351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.303719] [ 30.303846] Freed by task 213: [ 30.304077] kasan_save_stack+0x22/0x50 [ 30.304362] kasan_set_track+0x25/0x30 [ 30.304648] kasan_save_free_info+0x2b/0x50 [ 30.304956] __kasan_slab_free+0x10a/0x190 [ 30.305256] kmem_cache_free+0x10d/0x4d0 [ 30.305553] rcu_core+0x8c8/0x2860 [ 30.305819] __do_softirq+0x1b7/0x7d4 [ 30.306100] [ 30.306222] Last potentially related work creation: [ 30.306558] kasan_save_stack+0x22/0x50 [ 30.306845] __kasan_record_aux_stack+0x8e/0xa0 [ 30.307171] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.307543] remove_vma+0x139/0x170 [ 30.307802] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.308125] do_vmi_munmap+0x1f1/0x2b0 [ 30.308404] __vm_munmap+0x138/0x3a0 [ 30.308671] __x64_sys_munmap+0x59/0x80 [ 30.308959] do_syscall_64+0x3f/0x90 [ 30.309224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.309605] [ 30.309729] The buggy address belongs to the object at ffff8880099d4e80 [ 30.309729] which belongs to the cache vm_area_struct of size 168 [ 30.310601] The buggy address is located 88 bytes inside of [ 30.310601] freed 168-byte region [ffff8880099d4e80, ffff8880099d4f28) [ 30.311424] [ 30.311547] The buggy address belongs to the physical page: [ 30.311935] page:000000007a3d5499 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99d4 [ 30.312566] memcg:ffff8880099d5001 [ 30.312818] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.313184] page_type: 0xffffffff() [ 30.313455] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.313995] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099d5001 [ 30.314532] page dumped because: kasan: bad access detected [ 30.314915] [ 30.315042] Memory state around the buggy address: [ 30.315385] ffff8880099d4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.315885] ffff8880099d4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.316381] >ffff8880099d4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.316869] ^ [ 30.317285] ffff8880099d4f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.317796] ffff8880099d4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.318291] ================================================================== [ 30.319137] Disabling lock debugging due to kernel taint [ 32.239206] BUG: Bad rss-counter state mm:00000000a1c955d1 type:MM_FILEPAGES val:33 [ 32.240390] BUG: Bad rss-counter state mm:00000000a1c955d1 type:MM_ANONPAGES val:22 [ 32.744146] BUG: Bad rss-counter state mm:0000000010a13730 type:MM_FILEPAGES val:33 [ 32.745322] BUG: Bad rss-counter state mm:0000000010a13730 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29868' (ECDSA) to the list of known hosts. 2023/06/20 20:30:28 fuzzer started 2023/06/20 20:30:28 dialing manager at localhost:36067 2023/06/20 20:30:28 checking machine... 2023/06/20 20:30:28 checking revisions... [ 33.466777] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:30:29 testing simple program... [ 33.510117] cgroup: Unknown subsys name 'net' [ 33.572435] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:30:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81370a8a RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff8880168c7df0 RDI=ffffffff81370a8a RBP=ffffffff81370a8a RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020ed2 R12=0000000000000001 R13=0000000000000000 R14=ffff8880185251c0 R15=ffff88801a8b9d90 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007f9f56b2f900 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=00007ffc25a24000 CR3=0000000015bfa000 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=6720646572637465733a4d41503d706f 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 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=00007fe0cb2ea060 CR3=000000000edb4000 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=2038323a30333a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a30333a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000