syzkaller login: [ 31.632926] BUG: Bad rss-counter state mm:00000000d2b8452e type:MM_FILEPAGES val:33 [ 31.634594] BUG: Bad rss-counter state mm:00000000d2b8452e type:MM_ANONPAGES val:22 [ 31.793106] ================================================================== [ 31.794208] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.795174] Read of size 8 at addr ffff88800fe98d08 by task sshd/220 [ 31.796043] [ 31.796271] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.797116] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.798094] Call Trace: [ 31.798430] [ 31.798715] dump_stack_lvl+0x91/0xf0 [ 31.799202] print_report+0xcc/0x620 [ 31.799680] ? __virt_addr_valid+0x102/0x340 [ 31.800233] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.800843] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.801451] kasan_report+0xbe/0xf0 [ 31.801943] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.802555] vma_interval_tree_remove+0xc75/0xec0 [ 31.803180] vma_prepare+0xc54/0x11a0 [ 31.803678] __split_vma+0x5af/0x950 [ 31.804166] ? __pfx___split_vma+0x10/0x10 [ 31.804715] ? find_held_lock+0x2c/0x110 [ 31.805249] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.805840] ? lock_is_held_type+0x9f/0x120 [ 31.806397] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.807026] ? mtree_range_walk+0x632/0x900 [ 31.807593] ? mas_walk+0x5c7/0x7c0 [ 31.808083] do_vmi_munmap+0x1f1/0x2b0 [ 31.808587] mmap_region+0x1f9/0x2660 [ 31.809083] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.809607] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.810372] ? __pfx_lock_acquire+0x10/0x10 [ 31.810921] ? __pfx_mmap_region+0x10/0x10 [ 31.811470] ? security_mmap_addr+0x7d/0xa0 [ 31.812021] ? get_unmapped_area+0x1f5/0x3f0 [ 31.812583] do_mmap+0x854/0xf00 [ 31.813036] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.813552] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.814143] ksys_mmap_pgoff+0x3af/0x500 [ 31.814664] do_syscall_64+0x3f/0x90 [ 31.815156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.815823] RIP: 0033:0x7f8a3af97d82 [ 31.816298] 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 [ 31.818528] RSP: 002b:00007fff6aaaf628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.819468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a3af97d82 [ 31.820343] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a3a3d1000 [ 31.821225] RBP: 00007f8a3a3d1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.822116] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fac275ef70 [ 31.822996] R13: 00007fff6aaaf640 R14: 00007fff6aaaf670 R15: 00007fff6aaaf9d0 [ 31.823886] [ 31.824190] [ 31.824414] Allocated by task 213: [ 31.824858] kasan_save_stack+0x22/0x50 [ 31.825381] kasan_set_track+0x25/0x30 [ 31.825905] __kasan_slab_alloc+0x59/0x70 [ 31.826441] kmem_cache_alloc+0x16b/0x370 [ 31.826977] vm_area_dup+0x20/0x160 [ 31.827448] __split_vma+0x170/0x950 [ 31.827928] split_vma+0xc6/0x110 [ 31.828388] mprotect_fixup+0x8d2/0xb30 [ 31.828901] do_mprotect_pkey+0x87e/0xd40 [ 31.829437] __x64_sys_mprotect+0x78/0xc0 [ 31.829990] do_syscall_64+0x3f/0x90 [ 31.830479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.831142] [ 31.831365] Freed by task 213: [ 31.831763] kasan_save_stack+0x22/0x50 [ 31.832292] kasan_set_track+0x25/0x30 [ 31.832803] kasan_save_free_info+0x2b/0x50 [ 31.833351] __kasan_slab_free+0x10a/0x190 [ 31.833917] kmem_cache_free+0x10d/0x4d0 [ 31.834447] rcu_core+0x8c8/0x2860 [ 31.834910] __do_softirq+0x1b7/0x7d4 [ 31.835403] [ 31.835628] Last potentially related work creation: [ 31.836233] kasan_save_stack+0x22/0x50 [ 31.836758] __kasan_record_aux_stack+0x8e/0xa0 [ 31.837418] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.838091] remove_vma+0x139/0x170 [ 31.838555] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.839135] do_vmi_munmap+0x1f1/0x2b0 [ 31.839636] __vm_munmap+0x138/0x3a0 [ 31.840120] __x64_sys_munmap+0x59/0x80 [ 31.840636] do_syscall_64+0x3f/0x90 [ 31.841125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.841808] [ 31.842030] The buggy address belongs to the object at ffff88800fe98cb0 [ 31.842030] which belongs to the cache vm_area_struct of size 168 [ 31.843555] The buggy address is located 88 bytes inside of [ 31.843555] freed 168-byte region [ffff88800fe98cb0, ffff88800fe98d58) [ 31.845022] [ 31.845245] The buggy address belongs to the physical page: [ 31.845939] page:00000000bdc3a301 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe98 [ 31.847057] memcg:ffff88800e985e01 [ 31.847503] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.848173] page_type: 0xffffffff() [ 31.848646] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.849588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e985e01 [ 31.850541] page dumped because: kasan: bad access detected [ 31.851227] [ 31.851447] Memory state around the buggy address: [ 31.852053] ffff88800fe98c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.852938] ffff88800fe98c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.853854] >ffff88800fe98d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.854736] ^ [ 31.855187] ffff88800fe98d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.856077] ffff88800fe98e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.856952] ================================================================== [ 31.857907] Disabling lock debugging due to kernel taint [ 33.903805] BUG: Bad rss-counter state mm:000000002bc04c66 type:MM_FILEPAGES val:33 [ 33.904784] BUG: Bad rss-counter state mm:000000002bc04c66 type:MM_ANONPAGES val:22 [ 34.367542] BUG: Bad rss-counter state mm:00000000f890e03f type:MM_FILEPAGES val:33 [ 34.368603] BUG: Bad rss-counter state mm:00000000f890e03f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24146' (ECDSA) to the list of known hosts. 2023/06/19 17:11:14 fuzzer started 2023/06/19 17:11:14 dialing manager at localhost:44161 2023/06/19 17:11:14 checking machine... 2023/06/19 17:11:14 checking revisions... [ 35.056538] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:11:14 testing simple program... [ 35.107267] cgroup: Unknown subsys name 'net' [ 35.156478] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:11:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801bd97560 RCX=0000000000000001 RDX=1ffff110037b2ec5 RSI=ffffffff83640961 RDI=ffff88801bd9756c RBP=ffff88801bd97628 RSP=ffff88801bd97478 R8 =0000000000000001 R9 =ffff88801bd974d8 R10=0000000000038001 R11=000000000008aa86 R12=ffff88801bd97560 R13=0000000000000000 R14=ffff8880165d9b40 R15=0000000000000cc0 RIP=ffffffff813ad4f7 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 00007f9757501900 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=00007ffe48b9e000 CR3=000000000c7d0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=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=00007f56be99e790 CR3=000000000f646000 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=c0c2c707e55bedae7647ee828376f157 XMM02=2c67c8bc2e329bc3000000000011dcf8 XMM03=fb795ef6d65770560000000000124e08 XMM04=c0c18cfcb3a5f57a00000000000ae988 XMM05=05c5ba29f53fee770000000000135738 XMM06=c291bd5c70af25b900000000001347d8 XMM07=e042d86d42eb936e0000000000125088 XMM08=7360d7dccd34b16b000000000011dd58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000