syzkaller login: [ 31.647057] BUG: Bad rss-counter state mm:00000000c261fdd7 type:MM_FILEPAGES val:33 [ 31.648265] BUG: Bad rss-counter state mm:00000000c261fdd7 type:MM_ANONPAGES val:22 [ 31.803049] ================================================================== [ 31.803959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.804895] Read of size 8 at addr ffff88800fe49a50 by task sshd/220 [ 31.805675] [ 31.805996] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.807161] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.808449] Call Trace: [ 31.808875] [ 31.809257] dump_stack_lvl+0x91/0xf0 [ 31.809903] print_report+0xcc/0x620 [ 31.810539] ? __virt_addr_valid+0x102/0x340 [ 31.811287] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.812113] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.812930] kasan_report+0xbe/0xf0 [ 31.813566] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.814412] vma_interval_tree_remove+0xc75/0xec0 [ 31.815263] vma_prepare+0xc54/0x11a0 [ 31.815913] __split_vma+0x5af/0x950 [ 31.816556] ? __pfx___split_vma+0x10/0x10 [ 31.817272] ? find_held_lock+0x2c/0x110 [ 31.817990] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.818754] ? lock_is_held_type+0x9f/0x120 [ 31.819510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.820341] ? mtree_range_walk+0x632/0x900 [ 31.821093] ? mas_walk+0x5c7/0x7c0 [ 31.821736] do_vmi_munmap+0x1f1/0x2b0 [ 31.822406] mmap_region+0x1f9/0x2660 [ 31.823082] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.823778] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.824750] ? __pfx_lock_acquire+0x10/0x10 [ 31.825470] ? __pfx_mmap_region+0x10/0x10 [ 31.826196] ? security_mmap_addr+0x7d/0xa0 [ 31.826928] ? get_unmapped_area+0x1f5/0x3f0 [ 31.827617] do_mmap+0x854/0xf00 [ 31.828078] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.828582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.829153] ksys_mmap_pgoff+0x3af/0x500 [ 31.829658] do_syscall_64+0x3f/0x90 [ 31.830150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.830806] RIP: 0033:0x7f82a5adbd82 [ 31.831274] 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 [ 31.833428] RSP: 002b:00007fff26e34048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.834351] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82a5adbd82 [ 31.835227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82a4f15000 [ 31.836077] RBP: 00007f82a4f15000 R08: 0000000000000009 R09: 0000000000001000 [ 31.836928] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c108dbec0 [ 31.837778] R13: 00007fff26e34060 R14: 00007fff26e34090 R15: 00007fff26e343f0 [ 31.838643] [ 31.838944] [ 31.839163] Allocated by task 213: [ 31.839593] kasan_save_stack+0x22/0x50 [ 31.840105] kasan_set_track+0x25/0x30 [ 31.840607] __kasan_slab_alloc+0x59/0x70 [ 31.841130] kmem_cache_alloc+0x16b/0x370 [ 31.841656] vm_area_dup+0x20/0x160 [ 31.842118] __split_vma+0x170/0x950 [ 31.842586] split_vma+0xc6/0x110 [ 31.843041] mprotect_fixup+0x8d2/0xb30 [ 31.843543] do_mprotect_pkey+0x87e/0xd40 [ 31.844060] __x64_sys_mprotect+0x78/0xc0 [ 31.844583] do_syscall_64+0x3f/0x90 [ 31.845052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.845693] [ 31.845906] Freed by task 213: [ 31.846309] kasan_save_stack+0x22/0x50 [ 31.846812] kasan_set_track+0x25/0x30 [ 31.847331] kasan_save_free_info+0x2b/0x50 [ 31.847867] __kasan_slab_free+0x10a/0x190 [ 31.848400] kmem_cache_free+0x10d/0x4d0 [ 31.848911] rcu_core+0x8c8/0x2860 [ 31.849367] __do_softirq+0x1b7/0x7d4 [ 31.849857] [ 31.850070] Last potentially related work creation: [ 31.850658] kasan_save_stack+0x22/0x50 [ 31.851180] __kasan_record_aux_stack+0x8e/0xa0 [ 31.851763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.852408] remove_vma+0x139/0x170 [ 31.852868] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.853445] do_vmi_munmap+0x1f1/0x2b0 [ 31.853926] __vm_munmap+0x138/0x3a0 [ 31.854399] __x64_sys_munmap+0x59/0x80 [ 31.854900] do_syscall_64+0x3f/0x90 [ 31.855377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.856013] [ 31.856230] The buggy address belongs to the object at ffff88800fe499f8 [ 31.856230] which belongs to the cache vm_area_struct of size 168 [ 31.857732] The buggy address is located 88 bytes inside of [ 31.857732] freed 168-byte region [ffff88800fe499f8, ffff88800fe49aa0) [ 31.859163] [ 31.859383] The buggy address belongs to the physical page: [ 31.860043] page:000000007d8957f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe49 [ 31.861138] memcg:ffff88800f8ae701 [ 31.861568] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.862213] page_type: 0xffffffff() [ 31.862669] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.863604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f8ae701 [ 31.864520] page dumped because: kasan: bad access detected [ 31.865183] [ 31.865401] Memory state around the buggy address: [ 31.865983] ffff88800fe49900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.866864] ffff88800fe49980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.867721] >ffff88800fe49a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.868589] ^ [ 31.869297] ffff88800fe49a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.870159] ffff88800fe49b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.871019] ================================================================== [ 31.872014] Disabling lock debugging due to kernel taint [ 34.294893] BUG: Bad rss-counter state mm:00000000ac069324 type:MM_FILEPAGES val:33 [ 34.296042] BUG: Bad rss-counter state mm:00000000ac069324 type:MM_ANONPAGES val:22 [ 34.678897] BUG: Bad rss-counter state mm:0000000033d9cbb1 type:MM_FILEPAGES val:33 [ 34.679804] BUG: Bad rss-counter state mm:0000000033d9cbb1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64186' (ECDSA) to the list of known hosts. 2023/06/20 06:18:29 fuzzer started 2023/06/20 06:18:29 dialing manager at localhost:44161 2023/06/20 06:18:29 checking machine... 2023/06/20 06:18:29 checking revisions... [ 35.401106] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:18:29 testing simple program... [ 35.441715] cgroup: Unknown subsys name 'net' [ 35.487547] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:18:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85dbc1f8 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff88806ce099e0 R8 =ffffffff860d68c0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1f4 R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc68 RFL=00000256 [---ZAP-] 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 00007f529c5d9900 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=00007f529cb90618 CR3=000000000f288000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f37dd332f30 CR3=000000000fb82000 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=2039323a38313a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a38313a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000