syzkaller login: [ 44.838485] BUG: Bad rss-counter state mm:0000000093be9475 type:MM_FILEPAGES val:33 [ 44.839556] BUG: Bad rss-counter state mm:0000000093be9475 type:MM_ANONPAGES val:22 [ 44.887722] ================================================================== [ 44.888896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.889836] Read of size 8 at addr ffff88800cae1140 by task sshd/219 [ 44.890610] [ 44.890834] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.891717] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.892694] Call Trace: [ 44.893037] [ 44.893341] dump_stack_lvl+0x91/0xf0 [ 44.893920] print_report+0xcc/0x620 [ 44.894518] ? __virt_addr_valid+0x102/0x340 [ 44.895172] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.895892] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.896642] kasan_report+0xbe/0xf0 [ 44.897253] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.897880] vma_interval_tree_remove+0xc75/0xec0 [ 44.898481] vma_prepare+0xc54/0x11a0 [ 44.898957] __split_vma+0x5af/0x950 [ 44.899427] ? __pfx___split_vma+0x10/0x10 [ 44.899953] ? find_held_lock+0x2c/0x110 [ 44.900472] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.901042] ? lock_is_held_type+0x9f/0x120 [ 44.901578] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.902191] ? mtree_range_walk+0x632/0x900 [ 44.902746] ? mas_walk+0x5c7/0x7c0 [ 44.903221] do_vmi_munmap+0x1f1/0x2b0 [ 44.903708] mmap_region+0x1f9/0x2660 [ 44.904187] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.904698] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.905423] ? __pfx_lock_acquire+0x10/0x10 [ 44.905953] ? __pfx_mmap_region+0x10/0x10 [ 44.906487] ? security_mmap_addr+0x7d/0xa0 [ 44.907023] ? get_unmapped_area+0x1f5/0x3f0 [ 44.907580] do_mmap+0x854/0xf00 [ 44.908017] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.908510] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.909087] ksys_mmap_pgoff+0x3af/0x500 [ 44.909588] do_syscall_64+0x3f/0x90 [ 44.910064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.910703] RIP: 0033:0x7f1f66242d82 [ 44.911158] 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 [ 44.913273] RSP: 002b:00007ffe75d272b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.914169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f66242d82 [ 44.915012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f6567c000 [ 44.915855] RBP: 00007f1f6567c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.916697] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e93f936ec0 [ 44.917562] R13: 00007ffe75d272d0 R14: 00007ffe75d27300 R15: 00007ffe75d27660 [ 44.918414] [ 44.918708] [ 44.918928] Allocated by task 212: [ 44.919357] kasan_save_stack+0x22/0x50 [ 44.919862] kasan_set_track+0x25/0x30 [ 44.920355] __kasan_slab_alloc+0x59/0x70 [ 44.920881] kmem_cache_alloc+0x16b/0x370 [ 44.921394] vm_area_dup+0x20/0x160 [ 44.921851] __split_vma+0x170/0x950 [ 44.922315] split_vma+0xc6/0x110 [ 44.922766] mprotect_fixup+0x8d2/0xb30 [ 44.923271] do_mprotect_pkey+0x87e/0xd40 [ 44.923790] __x64_sys_mprotect+0x78/0xc0 [ 44.924311] do_syscall_64+0x3f/0x90 [ 44.924787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.925444] [ 44.925656] Freed by task 212: [ 44.926051] kasan_save_stack+0x22/0x50 [ 44.926553] kasan_set_track+0x25/0x30 [ 44.927044] kasan_save_free_info+0x2b/0x50 [ 44.927568] __kasan_slab_free+0x10a/0x190 [ 44.928098] kmem_cache_free+0x10d/0x4d0 [ 44.928599] rcu_core+0x8c8/0x2860 [ 44.929134] __do_softirq+0x1b7/0x7d4 [ 44.929611] [ 44.929827] Last potentially related work creation: [ 44.930418] kasan_save_stack+0x22/0x50 [ 44.930920] __kasan_record_aux_stack+0x8e/0xa0 [ 44.931496] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.932141] remove_vma+0x139/0x170 [ 44.932600] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.933170] do_vmi_munmap+0x1f1/0x2b0 [ 44.933657] __vm_munmap+0x138/0x3a0 [ 44.934127] __x64_sys_munmap+0x59/0x80 [ 44.934625] do_syscall_64+0x3f/0x90 [ 44.935096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.935744] [ 44.935961] The buggy address belongs to the object at ffff88800cae10e8 [ 44.935961] which belongs to the cache vm_area_struct of size 168 [ 44.937439] The buggy address is located 88 bytes inside of [ 44.937439] freed 168-byte region [ffff88800cae10e8, ffff88800cae1190) [ 44.938839] [ 44.939059] The buggy address belongs to the physical page: [ 44.939731] page:00000000149ef5e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcae1 [ 44.940834] memcg:ffff88800e32aa01 [ 44.941256] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.941918] page_type: 0xffffffff() [ 44.942375] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.943300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e32aa01 [ 44.944238] page dumped because: kasan: bad access detected [ 44.944910] [ 44.945121] Memory state around the buggy address: [ 44.945703] ffff88800cae1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.946562] ffff88800cae1080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 44.947417] >ffff88800cae1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.948255] ^ [ 44.948908] ffff88800cae1180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 44.949790] ffff88800cae1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 44.950647] ================================================================== [ 44.951568] Disabling lock debugging due to kernel taint [ 47.143835] BUG: Bad rss-counter state mm:000000002791e815 type:MM_FILEPAGES val:33 [ 47.144998] BUG: Bad rss-counter state mm:000000002791e815 type:MM_ANONPAGES val:22 [ 47.652853] BUG: Bad rss-counter state mm:000000007b0468a4 type:MM_FILEPAGES val:33 [ 47.654017] BUG: Bad rss-counter state mm:000000007b0468a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24041' (ECDSA) to the list of known hosts. 2023/06/20 05:50:05 fuzzer started 2023/06/20 05:50:06 dialing manager at localhost:44161 2023/06/20 05:50:06 checking machine... 2023/06/20 05:50:06 checking revisions... [ 48.268693] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:50:06 testing simple program... [ 48.311895] cgroup: Unknown subsys name 'net' [ 48.357687] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:49:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8613dd30 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888017f1f5f8 RSP=ffff888017f1f530 R8 =ffffffff8613dd34 R9 =ffff888017f1f5e0 R10=0000000000038001 R11=0000000000021ee6 R12=ffff888017f1f600 R13=ffff888017f1f5e8 R14=ffff888017f1f820 R15=ffff888017f1f5a0 RIP=ffffffff81131153 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 00007fa4199ec900 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=00007ffe9ccfd000 CR3=000000000e782000 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=00007f53f0752f20 CR3=000000000e49a000 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=2035303a30353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000