syzkaller login: [ 28.257888] BUG: Bad rss-counter state mm:0000000064eaed11 type:MM_FILEPAGES val:33 [ 28.259119] BUG: Bad rss-counter state mm:0000000064eaed11 type:MM_ANONPAGES val:22 [ 28.425135] ================================================================== [ 28.426050] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.427007] Read of size 8 at addr ffff88800e027058 by task sshd/219 [ 28.427797] [ 28.428034] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.429042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.430032] Call Trace: [ 28.430350] [ 28.430761] dump_stack_lvl+0x91/0xf0 [ 28.431413] print_report+0xcc/0x620 [ 28.432002] ? __virt_addr_valid+0x102/0x340 [ 28.432652] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.433381] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.434119] kasan_report+0xbe/0xf0 [ 28.434683] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.435422] vma_interval_tree_remove+0xc75/0xec0 [ 28.436150] vma_prepare+0xc54/0x11a0 [ 28.436714] __split_vma+0x5af/0x950 [ 28.437277] ? __pfx___split_vma+0x10/0x10 [ 28.437915] ? find_held_lock+0x2c/0x110 [ 28.438559] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.439257] ? lock_is_held_type+0x9f/0x120 [ 28.439925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.440617] ? mtree_range_walk+0x632/0x900 [ 28.441175] ? mas_walk+0x5c7/0x7c0 [ 28.441643] do_vmi_munmap+0x1f1/0x2b0 [ 28.442139] mmap_region+0x1f9/0x2660 [ 28.442628] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.443148] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.443855] ? __pfx_lock_acquire+0x10/0x10 [ 28.444401] ? __pfx_mmap_region+0x10/0x10 [ 28.444937] ? security_mmap_addr+0x7d/0xa0 [ 28.445471] ? get_unmapped_area+0x1f5/0x3f0 [ 28.446033] do_mmap+0x854/0xf00 [ 28.446470] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.446976] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.447547] ksys_mmap_pgoff+0x3af/0x500 [ 28.448075] do_syscall_64+0x3f/0x90 [ 28.448553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.449196] RIP: 0033:0x7fc506eaad82 [ 28.449655] 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 [ 28.451781] RSP: 002b:00007ffdaa16ad48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.452716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc506eaad82 [ 28.453574] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5062e4000 [ 28.454422] RBP: 00007fc5062e4000 R08: 0000000000000009 R09: 0000000000001000 [ 28.455266] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f470612b20 [ 28.456120] R13: 00007ffdaa16ad60 R14: 00007ffdaa16ad90 R15: 00007ffdaa16b0f0 [ 28.456982] [ 28.457274] [ 28.457492] Allocated by task 212: [ 28.457917] kasan_save_stack+0x22/0x50 [ 28.458420] kasan_set_track+0x25/0x30 [ 28.458914] __kasan_slab_alloc+0x59/0x70 [ 28.459435] kmem_cache_alloc+0x16b/0x370 [ 28.459958] vm_area_dup+0x20/0x160 [ 28.460440] __split_vma+0x170/0x950 [ 28.460908] split_vma+0xc6/0x110 [ 28.461355] mprotect_fixup+0x8d2/0xb30 [ 28.461855] do_mprotect_pkey+0x87e/0xd40 [ 28.462383] __x64_sys_mprotect+0x78/0xc0 [ 28.462908] do_syscall_64+0x3f/0x90 [ 28.463384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.464030] [ 28.464248] Freed by task 19: [ 28.464632] kasan_save_stack+0x22/0x50 [ 28.465147] kasan_set_track+0x25/0x30 [ 28.465646] kasan_save_free_info+0x2b/0x50 [ 28.466186] __kasan_slab_free+0x10a/0x190 [ 28.466724] kmem_cache_free+0x10d/0x4d0 [ 28.467232] rcu_core+0x8c8/0x2860 [ 28.467709] __do_softirq+0x1b7/0x7d4 [ 28.468204] [ 28.468433] Last potentially related work creation: [ 28.469019] kasan_save_stack+0x22/0x50 [ 28.469520] __kasan_record_aux_stack+0x8e/0xa0 [ 28.470097] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.470746] remove_vma+0x139/0x170 [ 28.471198] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.471757] do_vmi_munmap+0x1f1/0x2b0 [ 28.472266] __vm_munmap+0x138/0x3a0 [ 28.472729] __x64_sys_munmap+0x59/0x80 [ 28.473224] do_syscall_64+0x3f/0x90 [ 28.473707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.474354] [ 28.474580] Second to last potentially related work creation: [ 28.475262] kasan_save_stack+0x22/0x50 [ 28.475761] __kasan_record_aux_stack+0x8e/0xa0 [ 28.476343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.476995] remove_vma+0x139/0x170 [ 28.477450] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.478013] do_vmi_munmap+0x1f1/0x2b0 [ 28.478516] mmap_region+0x1f9/0x2660 [ 28.478997] do_mmap+0x854/0xf00 [ 28.479436] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.479924] ksys_mmap_pgoff+0x3af/0x500 [ 28.480456] do_syscall_64+0x3f/0x90 [ 28.480933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.481572] [ 28.481790] The buggy address belongs to the object at ffff88800e027000 [ 28.481790] which belongs to the cache vm_area_struct of size 168 [ 28.483258] The buggy address is located 88 bytes inside of [ 28.483258] freed 168-byte region [ffff88800e027000, ffff88800e0270a8) [ 28.484670] [ 28.484889] The buggy address belongs to the physical page: [ 28.485555] page:00000000b56f0aec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe027 [ 28.486639] memcg:ffff88800dc4fe01 [ 28.487064] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.487770] page_type: 0xffffffff() [ 28.488236] raw: 0100000000000200 ffff88800879fc80 ffffea000036fdc0 dead000000000003 [ 28.489157] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc4fe01 [ 28.490067] page dumped because: kasan: bad access detected [ 28.490729] [ 28.490952] Memory state around the buggy address: [ 28.491546] ffff88800e026f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 28.492414] ffff88800e026f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.493275] >ffff88800e027000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.494135] ^ [ 28.494871] ffff88800e027080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 28.495722] ffff88800e027100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.496586] ================================================================== [ 28.497589] Disabling lock debugging due to kernel taint [ 30.568560] BUG: Bad rss-counter state mm:000000008d0cfee8 type:MM_FILEPAGES val:33 [ 30.569804] BUG: Bad rss-counter state mm:000000008d0cfee8 type:MM_ANONPAGES val:22 [ 30.995814] BUG: Bad rss-counter state mm:00000000bd0eedf6 type:MM_FILEPAGES val:33 [ 30.997079] BUG: Bad rss-counter state mm:00000000bd0eedf6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46138' (ECDSA) to the list of known hosts. 2023/06/19 20:57:59 fuzzer started 2023/06/19 20:57:59 dialing manager at localhost:44161 2023/06/19 20:57:59 checking machine... 2023/06/19 20:57:59 checking revisions... [ 31.746120] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:57:59 testing simple program... [ 31.797186] cgroup: Unknown subsys name 'net' [ 31.837504] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:57:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fff0cc48a78 CR3=0000000005482000 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=00007f065a22d510000055abe5ea1790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f379b553a80 CR3=000000000e876000 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=2038353a37353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a37353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000