syzkaller login: [ 54.228639] BUG: Bad rss-counter state mm:000000000eff9292 type:MM_FILEPAGES val:33 [ 54.229854] BUG: Bad rss-counter state mm:000000000eff9292 type:MM_ANONPAGES val:22 [ 54.271704] ================================================================== [ 54.272619] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.273715] Read of size 8 at addr ffff8880177fdb38 by task sshd/219 [ 54.274499] [ 54.274719] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.275626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.276626] Call Trace: [ 54.276956] [ 54.277243] dump_stack_lvl+0x91/0xf0 [ 54.277743] print_report+0xcc/0x620 [ 54.278235] ? __virt_addr_valid+0x102/0x340 [ 54.278800] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.279450] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.280070] kasan_report+0xbe/0xf0 [ 54.280562] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.281197] vma_interval_tree_remove+0xc75/0xec0 [ 54.281813] vma_prepare+0xc54/0x11a0 [ 54.282296] __split_vma+0x5af/0x950 [ 54.282781] ? __pfx___split_vma+0x10/0x10 [ 54.283321] ? find_held_lock+0x2c/0x110 [ 54.283849] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.284416] ? lock_is_held_type+0x9f/0x120 [ 54.284962] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.285571] ? mtree_range_walk+0x632/0x900 [ 54.286121] ? mas_walk+0x5c7/0x7c0 [ 54.286596] do_vmi_munmap+0x1f1/0x2b0 [ 54.287097] mmap_region+0x1f9/0x2660 [ 54.287576] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.288082] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.288819] ? __pfx_lock_acquire+0x10/0x10 [ 54.289373] ? __pfx_mmap_region+0x10/0x10 [ 54.289919] ? security_mmap_addr+0x7d/0xa0 [ 54.290464] ? get_unmapped_area+0x1f5/0x3f0 [ 54.291036] do_mmap+0x854/0xf00 [ 54.291489] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.292004] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.292580] ksys_mmap_pgoff+0x3af/0x500 [ 54.293086] do_syscall_64+0x3f/0x90 [ 54.293564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.294210] RIP: 0033:0x7fe2c8a8fd82 [ 54.294680] 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 [ 54.296812] RSP: 002b:00007ffc25eec7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.297753] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2c8a8fd82 [ 54.298545] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2c7ec9000 [ 54.299456] RBP: 00007fe2c7ec9000 R08: 0000000000000009 R09: 0000000000001000 [ 54.300252] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559800a24f60 [ 54.301051] R13: 00007ffc25eec800 R14: 00007ffc25eec830 R15: 00007ffc25eecb90 [ 54.301888] [ 54.302163] [ 54.302367] Allocated by task 212: [ 54.302774] kasan_save_stack+0x22/0x50 [ 54.303269] kasan_set_track+0x25/0x30 [ 54.303746] __kasan_slab_alloc+0x59/0x70 [ 54.304246] kmem_cache_alloc+0x16b/0x370 [ 54.304736] vm_area_dup+0x20/0x160 [ 54.305163] __split_vma+0x170/0x950 [ 54.305599] split_vma+0xc6/0x110 [ 54.306014] mprotect_fixup+0x8d2/0xb30 [ 54.306490] do_mprotect_pkey+0x87e/0xd40 [ 54.307046] __x64_sys_mprotect+0x78/0xc0 [ 54.307661] do_syscall_64+0x3f/0x90 [ 54.308237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.309019] [ 54.309285] Freed by task 212: [ 54.309771] kasan_save_stack+0x22/0x50 [ 54.310304] kasan_set_track+0x25/0x30 [ 54.310772] kasan_save_free_info+0x2b/0x50 [ 54.311295] __kasan_slab_free+0x10a/0x190 [ 54.311798] kmem_cache_free+0x10d/0x4d0 [ 54.312283] rcu_core+0x8c8/0x2860 [ 54.312737] __do_softirq+0x1b7/0x7d4 [ 54.313238] [ 54.313460] Last potentially related work creation: [ 54.314089] kasan_save_stack+0x22/0x50 [ 54.314612] __kasan_record_aux_stack+0x8e/0xa0 [ 54.315219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.315911] remove_vma+0x139/0x170 [ 54.316373] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.316950] do_vmi_munmap+0x1f1/0x2b0 [ 54.317453] __vm_munmap+0x138/0x3a0 [ 54.317920] __x64_sys_munmap+0x59/0x80 [ 54.318420] do_syscall_64+0x3f/0x90 [ 54.318935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.319568] [ 54.319785] The buggy address belongs to the object at ffff8880177fdae0 [ 54.319785] which belongs to the cache vm_area_struct of size 168 [ 54.321346] The buggy address is located 88 bytes inside of [ 54.321346] freed 168-byte region [ffff8880177fdae0, ffff8880177fdb88) [ 54.322787] [ 54.323016] The buggy address belongs to the physical page: [ 54.323696] page:00000000613ed079 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x177fd [ 54.324820] memcg:ffff88800e3b9a01 [ 54.325251] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.325915] page_type: 0xffffffff() [ 54.326393] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 54.327368] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3b9a01 [ 54.328303] page dumped because: kasan: bad access detected [ 54.328978] [ 54.329200] Memory state around the buggy address: [ 54.329804] ffff8880177fda00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.330692] ffff8880177fda80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 54.331580] >ffff8880177fdb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.332492] ^ [ 54.333133] ffff8880177fdb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 54.334005] ffff8880177fdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 54.334902] ================================================================== [ 54.335989] Disabling lock debugging due to kernel taint [ 56.344506] BUG: Bad rss-counter state mm:000000000df92bdb type:MM_FILEPAGES val:33 [ 56.345670] BUG: Bad rss-counter state mm:000000000df92bdb type:MM_ANONPAGES val:22 [ 56.740864] BUG: Bad rss-counter state mm:000000003c57b318 type:MM_FILEPAGES val:33 [ 56.742501] BUG: Bad rss-counter state mm:000000003c57b318 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30146' (ECDSA) to the list of known hosts. 2023/06/20 05:28:09 fuzzer started 2023/06/20 05:28:09 dialing manager at localhost:44161 2023/06/20 05:28:09 checking machine... 2023/06/20 05:28:09 checking revisions... [ 57.459767] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:28:09 testing simple program... [ 57.517294] cgroup: Unknown subsys name 'net' [ 57.559142] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:27:45 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=00007f0facbb3f40 CR3=000000000e708000 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=2039303a38323a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a38323a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028cff10 RSI=ffffffff8186d60e RDI=ffff88801467f8f0 RBP=ffff88801467f8c0 RSP=ffff88801467f818 R8 =0000000000000001 R9 =ffff88801467f868 R10=0000000000038001 R11=00000000000229cd R12=ffff88801467f8f0 R13=0000000000000000 R14=ffff888019dc3680 R15=0000000000092cc0 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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 00007f2dbde14900 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=00007ffecd554000 CR3=000000000da2c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000