syzkaller login: [ 63.429801] BUG: Bad rss-counter state mm:00000000e4aa2a57 type:MM_FILEPAGES val:33 [ 63.431059] BUG: Bad rss-counter state mm:00000000e4aa2a57 type:MM_ANONPAGES val:22 [ 63.615951] ================================================================== [ 63.617053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.618042] Read of size 8 at addr ffff8880181d0310 by task sshd/219 [ 63.618854] [ 63.619099] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.620178] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.621213] Call Trace: [ 63.621543] [ 63.621835] dump_stack_lvl+0x91/0xf0 [ 63.622340] print_report+0xcc/0x620 [ 63.622843] ? __virt_addr_valid+0x102/0x340 [ 63.623427] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.624073] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.624709] kasan_report+0xbe/0xf0 [ 63.625210] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.625854] vma_interval_tree_remove+0xc75/0xec0 [ 63.626490] vma_prepare+0xc54/0x11a0 [ 63.626998] __split_vma+0x5af/0x950 [ 63.627534] ? __pfx___split_vma+0x10/0x10 [ 63.628084] ? find_held_lock+0x2c/0x110 [ 63.628629] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.629222] ? lock_is_held_type+0x9f/0x120 [ 63.629781] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.630416] ? mtree_range_walk+0x632/0x900 [ 63.630998] ? mas_walk+0x5c7/0x7c0 [ 63.631517] do_vmi_munmap+0x1f1/0x2b0 [ 63.632041] mmap_region+0x1f9/0x2660 [ 63.632546] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.633086] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.633846] ? __pfx_lock_acquire+0x10/0x10 [ 63.634389] ? __pfx_mmap_region+0x10/0x10 [ 63.634934] ? security_mmap_addr+0x7d/0xa0 [ 63.635492] ? get_unmapped_area+0x1f5/0x3f0 [ 63.636066] do_mmap+0x854/0xf00 [ 63.636528] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.637043] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.637635] ksys_mmap_pgoff+0x3af/0x500 [ 63.638159] do_syscall_64+0x3f/0x90 [ 63.638654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.639346] RIP: 0033:0x7f48f55c2d82 [ 63.639829] 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 [ 63.642055] RSP: 002b:00007ffca5948168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.642993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f48f55c2d82 [ 63.643877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f48f49fc000 [ 63.644762] RBP: 00007f48f49fc000 R08: 0000000000000009 R09: 0000000000001000 [ 63.645638] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592c4ca8ec0 [ 63.646566] R13: 00007ffca5948180 R14: 00007ffca59481b0 R15: 00007ffca5948510 [ 63.647609] [ 63.647953] [ 63.648207] Allocated by task 211: [ 63.648714] kasan_save_stack+0x22/0x50 [ 63.649313] kasan_set_track+0x25/0x30 [ 63.649896] __kasan_slab_alloc+0x59/0x70 [ 63.650514] kmem_cache_alloc+0x16b/0x370 [ 63.651152] vm_area_dup+0x20/0x160 [ 63.651694] __split_vma+0x170/0x950 [ 63.652241] split_vma+0xc6/0x110 [ 63.652754] mprotect_fixup+0x8d2/0xb30 [ 63.653341] do_mprotect_pkey+0x87e/0xd40 [ 63.653953] __x64_sys_mprotect+0x78/0xc0 [ 63.654567] do_syscall_64+0x3f/0x90 [ 63.655139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.655903] [ 63.656153] Freed by task 211: [ 63.656615] kasan_save_stack+0x22/0x50 [ 63.657205] kasan_set_track+0x25/0x30 [ 63.657783] kasan_save_free_info+0x2b/0x50 [ 63.658410] __kasan_slab_free+0x10a/0x190 [ 63.659064] kmem_cache_free+0x10d/0x4d0 [ 63.659660] rcu_core+0x8c8/0x2860 [ 63.660177] __do_softirq+0x1b7/0x7d4 [ 63.660726] [ 63.660974] Last potentially related work creation: [ 63.661651] kasan_save_stack+0x22/0x50 [ 63.662239] __kasan_record_aux_stack+0x8e/0xa0 [ 63.662920] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.663668] remove_vma+0x139/0x170 [ 63.664187] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.664823] do_vmi_munmap+0x1f1/0x2b0 [ 63.665376] __vm_munmap+0x138/0x3a0 [ 63.665900] __x64_sys_munmap+0x59/0x80 [ 63.666459] do_syscall_64+0x3f/0x90 [ 63.667000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.667761] [ 63.668004] The buggy address belongs to the object at ffff8880181d02b8 [ 63.668004] which belongs to the cache vm_area_struct of size 168 [ 63.669645] The buggy address is located 88 bytes inside of [ 63.669645] freed 168-byte region [ffff8880181d02b8, ffff8880181d0360) [ 63.671216] [ 63.671463] The buggy address belongs to the physical page: [ 63.672199] page:000000002be45993 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181d0 [ 63.673407] memcg:ffff8880097cb801 [ 63.673890] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.674623] page_type: 0xffffffff() [ 63.675189] raw: 0100000000000200 ffff88800879fc80 ffffea0000566e00 dead000000000004 [ 63.676239] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097cb801 [ 63.677262] page dumped because: kasan: bad access detected [ 63.678018] [ 63.678261] Memory state around the buggy address: [ 63.678925] ffff8880181d0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 63.679919] ffff8880181d0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 63.680896] >ffff8880181d0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 63.681869] ^ [ 63.682401] ffff8880181d0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.683391] ffff8880181d0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 63.684349] ================================================================== [ 63.685506] Disabling lock debugging due to kernel taint [ 65.884289] BUG: Bad rss-counter state mm:00000000c929e010 type:MM_FILEPAGES val:33 [ 65.885446] BUG: Bad rss-counter state mm:00000000c929e010 type:MM_ANONPAGES val:22 [ 66.303899] BUG: Bad rss-counter state mm:0000000047aba763 type:MM_FILEPAGES val:33 [ 66.305085] BUG: Bad rss-counter state mm:0000000047aba763 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10921' (ECDSA) to the list of known hosts. 2023/06/19 14:07:50 fuzzer started 2023/06/19 14:07:50 dialing manager at localhost:44161 2023/06/19 14:07:50 checking machine... 2023/06/19 14:07:50 checking revisions... [ 67.000831] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:07:50 testing simple program... [ 67.041818] cgroup: Unknown subsys name 'net' [ 67.091675] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:07:15 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=0000000000000001 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=00007ffc9b712d48 CR3=0000000005482000 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=00007f15572705100000559da5f57790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed10033cffc1 RBX=0000000000000af8 RCX=0000000000000000 RDX=ffff88800ee2b680 RSI=ffffffff8162f82e RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888019e7fb48 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000af8 R11=2f6e6962732f7273 R12=ffffea0000619e00 R13=ffff888019e7fc00 R14=ffff888019e7fe00 R15=dffffc0000000000 RIP=ffffffff8162f836 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 00007f47b17ac900 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=00007f47b1d640b0 CR3=000000001a38c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000