syzkaller login: [ 31.459944] BUG: Bad rss-counter state mm:0000000007924e33 type:MM_FILEPAGES val:33 [ 31.461410] BUG: Bad rss-counter state mm:0000000007924e33 type:MM_ANONPAGES val:22 [ 31.618105] ================================================================== [ 31.619028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.619982] Read of size 8 at addr ffff88800e047a50 by task sshd/221 [ 31.620748] [ 31.620963] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.622004] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.623006] Call Trace: [ 31.623330] [ 31.623612] dump_stack_lvl+0x91/0xf0 [ 31.624118] print_report+0xcc/0x620 [ 31.624606] ? __virt_addr_valid+0x102/0x340 [ 31.625158] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.625779] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.626399] kasan_report+0xbe/0xf0 [ 31.626879] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.627503] vma_interval_tree_remove+0xc75/0xec0 [ 31.628113] vma_prepare+0xc54/0x11a0 [ 31.628595] __split_vma+0x5af/0x950 [ 31.629070] ? __pfx___split_vma+0x10/0x10 [ 31.629604] ? find_held_lock+0x2c/0x110 [ 31.630126] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.630707] ? lock_is_held_type+0x9f/0x120 [ 31.631253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.631861] ? mtree_range_walk+0x632/0x900 [ 31.632413] ? mas_walk+0x5c7/0x7c0 [ 31.632889] do_vmi_munmap+0x1f1/0x2b0 [ 31.633389] mmap_region+0x1f9/0x2660 [ 31.633870] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.634401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.635113] ? __pfx_lock_acquire+0x10/0x10 [ 31.635647] ? __pfx_mmap_region+0x10/0x10 [ 31.636186] ? security_mmap_addr+0x7d/0xa0 [ 31.636721] ? get_unmapped_area+0x1f5/0x3f0 [ 31.637269] do_mmap+0x854/0xf00 [ 31.637707] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.638205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.638770] ksys_mmap_pgoff+0x3af/0x500 [ 31.639282] do_syscall_64+0x3f/0x90 [ 31.639768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.640417] RIP: 0033:0x7fbf7e64cd82 [ 31.640881] 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 [ 31.643031] RSP: 002b:00007ffd184943a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.643924] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf7e64cd82 [ 31.644764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf7da86000 [ 31.645610] RBP: 00007fbf7da86000 R08: 0000000000000009 R09: 0000000000001000 [ 31.646476] R10: 0000000000000812 R11: 0000000000000206 R12: 000055776f49af70 [ 31.647312] R13: 00007ffd184943c0 R14: 00007ffd184943f0 R15: 00007ffd18494750 [ 31.648162] [ 31.648456] [ 31.648672] Allocated by task 214: [ 31.649097] kasan_save_stack+0x22/0x50 [ 31.649598] kasan_set_track+0x25/0x30 [ 31.650088] __kasan_slab_alloc+0x59/0x70 [ 31.650617] kmem_cache_alloc+0x16b/0x370 [ 31.651131] vm_area_dup+0x20/0x160 [ 31.651589] __split_vma+0x170/0x950 [ 31.652056] split_vma+0xc6/0x110 [ 31.652496] mprotect_fixup+0x8d2/0xb30 [ 31.653006] do_mprotect_pkey+0x87e/0xd40 [ 31.653527] __x64_sys_mprotect+0x78/0xc0 [ 31.654057] do_syscall_64+0x3f/0x90 [ 31.654551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.655198] [ 31.655418] Freed by task 205: [ 31.655808] kasan_save_stack+0x22/0x50 [ 31.656316] kasan_set_track+0x25/0x30 [ 31.656813] kasan_save_free_info+0x2b/0x50 [ 31.657350] __kasan_slab_free+0x10a/0x190 [ 31.657881] kmem_cache_free+0x10d/0x4d0 [ 31.658398] rcu_core+0x8c8/0x2860 [ 31.658858] __do_softirq+0x1b7/0x7d4 [ 31.659336] [ 31.659551] Last potentially related work creation: [ 31.660132] kasan_save_stack+0x22/0x50 [ 31.660632] __kasan_record_aux_stack+0x8e/0xa0 [ 31.661204] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.661862] remove_vma+0x139/0x170 [ 31.662311] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.662987] do_vmi_munmap+0x1f1/0x2b0 [ 31.663478] __vm_munmap+0x138/0x3a0 [ 31.663942] __x64_sys_munmap+0x59/0x80 [ 31.664435] do_syscall_64+0x3f/0x90 [ 31.664908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.665552] [ 31.665770] Second to last potentially related work creation: [ 31.666475] kasan_save_stack+0x22/0x50 [ 31.666991] __kasan_record_aux_stack+0x8e/0xa0 [ 31.667566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.668216] remove_vma+0x139/0x170 [ 31.668670] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.669238] do_vmi_munmap+0x1f1/0x2b0 [ 31.669730] mmap_region+0x1f9/0x2660 [ 31.670215] do_mmap+0x854/0xf00 [ 31.670658] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.671149] ksys_mmap_pgoff+0x3af/0x500 [ 31.671658] do_syscall_64+0x3f/0x90 [ 31.672138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.672782] [ 31.672996] The buggy address belongs to the object at ffff88800e0479f8 [ 31.672996] which belongs to the cache vm_area_struct of size 168 [ 31.674502] The buggy address is located 88 bytes inside of [ 31.674502] freed 168-byte region [ffff88800e0479f8, ffff88800e047aa0) [ 31.675934] [ 31.676154] The buggy address belongs to the physical page: [ 31.676818] page:0000000040bc9837 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe047 [ 31.677910] memcg:ffff88800c5c2301 [ 31.678348] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.679059] page_type: 0xffffffff() [ 31.679524] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.680460] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5c2301 [ 31.681385] page dumped because: kasan: bad access detected [ 31.682053] [ 31.682267] Memory state around the buggy address: [ 31.682866] ffff88800e047900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.683735] ffff88800e047980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.684611] >ffff88800e047a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.685474] ^ [ 31.686183] ffff88800e047a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.687055] ffff88800e047b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.687919] ================================================================== [ 31.688876] Disabling lock debugging due to kernel taint [ 33.739234] BUG: Bad rss-counter state mm:000000006b823c44 type:MM_FILEPAGES val:33 [ 33.740911] BUG: Bad rss-counter state mm:000000006b823c44 type:MM_ANONPAGES val:22 [ 34.305788] BUG: Bad rss-counter state mm:00000000d8b0dcd9 type:MM_FILEPAGES val:33 [ 34.306999] BUG: Bad rss-counter state mm:00000000d8b0dcd9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63996' (ECDSA) to the list of known hosts. 2023/06/20 05:15:11 fuzzer started 2023/06/20 05:15:12 dialing manager at localhost:44161 2023/06/20 05:15:12 checking machine... 2023/06/20 05:15:12 checking revisions... [ 34.927866] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:15:12 testing simple program... [ 34.973997] cgroup: Unknown subsys name 'net' [ 35.023878] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:15:09 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=00007fb4c7a266e0 CR3=000000000d622000 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=9d7c240177fba48afb43f20c444caaa1 XMM02=ec2efd57dc4c00df000000000011c358 XMM03=ce94649b008fe1b0000000000011c428 XMM04=b62488e89b1f44d700000000000ae988 XMM05=5a9d233068761c4a0000000000134820 XMM06=db20f175d54767f000000000001346a8 XMM07=e042d86d42eb936e0000000000123360 XMM08=ce94649b008fe1b0000000000011c428 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=ffff888019c9f601 RSI=ffff888019c9f6d0 RDI=ffff888019c9f6d0 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff888019c9f6d0 R15=ffff88806cf09a78 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007efeddc6d900 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=00007ffcbdc3a000 CR3=000000001a3a8000 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=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