syzkaller login: [ 30.907593] BUG: Bad rss-counter state mm:00000000174c51ec type:MM_FILEPAGES val:33 [ 30.909909] BUG: Bad rss-counter state mm:00000000174c51ec type:MM_ANONPAGES val:22 [ 31.073305] ================================================================== [ 31.074168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.075050] Read of size 8 at addr ffff88800cb3eed8 by task sshd/220 [ 31.075782] [ 31.075995] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.076896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.077894] Call Trace: [ 31.078221] [ 31.078524] dump_stack_lvl+0x91/0xf0 [ 31.079008] print_report+0xcc/0x620 [ 31.079504] ? __virt_addr_valid+0x102/0x340 [ 31.080064] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.080688] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081308] kasan_report+0xbe/0xf0 [ 31.081789] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.082408] vma_interval_tree_remove+0xc75/0xec0 [ 31.083012] vma_prepare+0xc54/0x11a0 [ 31.083522] __split_vma+0x5af/0x950 [ 31.083995] ? __pfx___split_vma+0x10/0x10 [ 31.084527] ? find_held_lock+0x2c/0x110 [ 31.085050] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.085623] ? lock_is_held_type+0x9f/0x120 [ 31.086193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.086830] ? mtree_range_walk+0x632/0x900 [ 31.087425] ? mas_walk+0x5c7/0x7c0 [ 31.087924] do_vmi_munmap+0x1f1/0x2b0 [ 31.088451] mmap_region+0x1f9/0x2660 [ 31.088956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.089506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.090272] ? __pfx_lock_acquire+0x10/0x10 [ 31.090834] ? __pfx_mmap_region+0x10/0x10 [ 31.091398] ? security_mmap_addr+0x7d/0xa0 [ 31.091963] ? get_unmapped_area+0x1f5/0x3f0 [ 31.092543] do_mmap+0x854/0xf00 [ 31.093010] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.093532] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.094126] ksys_mmap_pgoff+0x3af/0x500 [ 31.094659] do_syscall_64+0x3f/0x90 [ 31.095168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.095874] RIP: 0033:0x7f8167039d82 [ 31.096351] 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 [ 31.098591] RSP: 002b:00007fff2ca47e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.099554] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8167039d82 [ 31.100452] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8166473000 [ 31.101363] RBP: 00007f8166473000 R08: 0000000000000009 R09: 0000000000001000 [ 31.102278] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b34c2cd90 [ 31.103184] R13: 00007fff2ca47e20 R14: 00007fff2ca47e50 R15: 00007fff2ca481b0 [ 31.104113] [ 31.104423] [ 31.104648] Allocated by task 213: [ 31.105103] kasan_save_stack+0x22/0x50 [ 31.105633] kasan_set_track+0x25/0x30 [ 31.106161] __kasan_slab_alloc+0x59/0x70 [ 31.106712] kmem_cache_alloc+0x16b/0x370 [ 31.107279] vm_area_dup+0x20/0x160 [ 31.107759] __split_vma+0x170/0x950 [ 31.108256] split_vma+0xc6/0x110 [ 31.108723] mprotect_fixup+0x8d2/0xb30 [ 31.109256] do_mprotect_pkey+0x87e/0xd40 [ 31.109804] __x64_sys_mprotect+0x78/0xc0 [ 31.110359] do_syscall_64+0x3f/0x90 [ 31.110864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.111550] [ 31.111773] Freed by task 213: [ 31.112190] kasan_save_stack+0x22/0x50 [ 31.112723] kasan_set_track+0x25/0x30 [ 31.113247] kasan_save_free_info+0x2b/0x50 [ 31.113812] __kasan_slab_free+0x10a/0x190 [ 31.114377] kmem_cache_free+0x10d/0x4d0 [ 31.114923] rcu_core+0x8c8/0x2860 [ 31.115415] __do_softirq+0x1b7/0x7d4 [ 31.115922] [ 31.116145] Last potentially related work creation: [ 31.116770] kasan_save_stack+0x22/0x50 [ 31.117302] __kasan_record_aux_stack+0x8e/0xa0 [ 31.117914] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.118600] remove_vma+0x139/0x170 [ 31.119078] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.119674] do_vmi_munmap+0x1f1/0x2b0 [ 31.120186] __vm_munmap+0x138/0x3a0 [ 31.120685] __x64_sys_munmap+0x59/0x80 [ 31.121213] do_syscall_64+0x3f/0x90 [ 31.121718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.122406] [ 31.122631] Second to last potentially related work creation: [ 31.123368] kasan_save_stack+0x22/0x50 [ 31.123906] __kasan_record_aux_stack+0x8e/0xa0 [ 31.124511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.125195] remove_vma+0x139/0x170 [ 31.125679] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.126261] do_vmi_munmap+0x1f1/0x2b0 [ 31.126780] mmap_region+0x1f9/0x2660 [ 31.127305] do_mmap+0x854/0xf00 [ 31.127757] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.128261] ksys_mmap_pgoff+0x3af/0x500 [ 31.128792] do_syscall_64+0x3f/0x90 [ 31.129294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129966] [ 31.130197] The buggy address belongs to the object at ffff88800cb3ee80 [ 31.130197] which belongs to the cache vm_area_struct of size 168 [ 31.131766] The buggy address is located 88 bytes inside of [ 31.131766] freed 168-byte region [ffff88800cb3ee80, ffff88800cb3ef28) [ 31.133249] [ 31.133472] The buggy address belongs to the physical page: [ 31.134165] page:000000009e0ced29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb3e [ 31.135328] memcg:ffff88800e543f01 [ 31.135787] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.136475] page_type: 0xffffffff() [ 31.136952] raw: 0100000000000200 ffff88800879fc80 ffffea00002534c0 0000000000000004 [ 31.137934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e543f01 [ 31.138893] page dumped because: kasan: bad access detected [ 31.139601] [ 31.139829] Memory state around the buggy address: [ 31.140438] ffff88800cb3ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.141354] ffff88800cb3ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.142273] >ffff88800cb3ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.143175] ^ [ 31.143960] ffff88800cb3ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.144870] ffff88800cb3ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.145776] ================================================================== [ 31.146814] Disabling lock debugging due to kernel taint [ 33.893682] BUG: Bad rss-counter state mm:0000000004128bca type:MM_FILEPAGES val:33 [ 33.894858] BUG: Bad rss-counter state mm:0000000004128bca type:MM_ANONPAGES val:22 [ 34.372229] BUG: Bad rss-counter state mm:00000000f874471c type:MM_FILEPAGES val:33 [ 34.373384] BUG: Bad rss-counter state mm:00000000f874471c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20242' (ECDSA) to the list of known hosts. 2023/06/20 04:53:53 fuzzer started 2023/06/20 04:53:54 dialing manager at localhost:44161 2023/06/20 04:53:54 checking machine... 2023/06/20 04:53:54 checking revisions... [ 34.990567] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:53:54 testing simple program... [ 35.025379] cgroup: Unknown subsys name 'net' [ 35.086217] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:53:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88808d48f080 RCX=ffffffff811430ee RDX=ffff88800dc89b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88800d48f080 RSP=ffff88800fc0fcb8 R8 =0000000000000006 R9 =ffff88800d48f080 R10=ffff88808d48f080 R11=0000000000000001 R12=0000000000000000 R13=ffffea000040b600 R14=ffffffff81893972 R15=dffffc0000000000 RIP=ffffffff814c01fc 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 00007f577c13e900 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=00007f577c6f60b0 CR3=000000001cad2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f5faf8fb8f0 CR3=000000000d680000 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=023831bd817aeca5e441fd903c16eee0 XMM02=2c67c8bc2e329bc3000000000011cfc0 XMM03=fb795ef6d657705600000000001240f8 XMM04=18f68986658778bd00000000000ae988 XMM05=19e9129bd510f2350000000000134fe8 XMM06=9b099e7e0557e8200000000000133e50 XMM07=e042d86d42eb936e0000000000124378 XMM08=236bb9c435c48e43000000000011d020 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000