syzkaller login: [ 28.746101] BUG: Bad rss-counter state mm:00000000e2c979d2 type:MM_FILEPAGES val:33 [ 28.746908] BUG: Bad rss-counter state mm:00000000e2c979d2 type:MM_ANONPAGES val:22 [ 28.924612] ================================================================== [ 28.925336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.926005] Read of size 8 at addr ffff88800d48aed8 by task sshd/221 [ 28.926568] [ 28.926717] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.927276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.927906] Call Trace: [ 28.928116] [ 28.928300] dump_stack_lvl+0x91/0xf0 [ 28.929147] print_report+0xcc/0x620 [ 28.929470] ? __virt_addr_valid+0x102/0x340 [ 28.929837] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.930253] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.930669] kasan_report+0xbe/0xf0 [ 28.930993] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.931410] vma_interval_tree_remove+0xc75/0xec0 [ 28.931804] vma_prepare+0xc54/0x11a0 [ 28.932119] __split_vma+0x5af/0x950 [ 28.932427] ? __pfx___split_vma+0x10/0x10 [ 28.932778] ? find_held_lock+0x2c/0x110 [ 28.933147] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.933514] ? lock_is_held_type+0x9f/0x120 [ 28.933899] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.934297] ? mtree_range_walk+0x632/0x900 [ 28.934663] ? mas_walk+0x5c7/0x7c0 [ 28.934978] do_vmi_munmap+0x1f1/0x2b0 [ 28.935317] mmap_region+0x1f9/0x2660 [ 28.935640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.935990] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.936469] ? __pfx_lock_acquire+0x10/0x10 [ 28.936825] ? __pfx_mmap_region+0x10/0x10 [ 28.937195] ? security_mmap_addr+0x7d/0xa0 [ 28.937578] ? get_unmapped_area+0x1f5/0x3f0 [ 28.937967] do_mmap+0x854/0xf00 [ 28.938290] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.938645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.939067] ksys_mmap_pgoff+0x3af/0x500 [ 28.939436] do_syscall_64+0x3f/0x90 [ 28.939785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.940254] RIP: 0033:0x7f8eda932d82 [ 28.940588] 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 [ 28.943420] RSP: 002b:00007ffef1c23448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.944060] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8eda932d82 [ 28.944648] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ed9d6c000 [ 28.945274] RBP: 00007f8ed9d6c000 R08: 0000000000000009 R09: 0000000000001000 [ 28.945832] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad22ad2ec0 [ 28.946385] R13: 00007ffef1c23460 R14: 00007ffef1c23490 R15: 00007ffef1c237f0 [ 28.946952] [ 28.947150] [ 28.947295] Allocated by task 212: [ 28.947585] kasan_save_stack+0x22/0x50 [ 28.947937] kasan_set_track+0x25/0x30 [ 28.948274] __kasan_slab_alloc+0x59/0x70 [ 28.948631] kmem_cache_alloc+0x16b/0x370 [ 28.948978] vm_area_dup+0x20/0x160 [ 28.949308] __split_vma+0x170/0x950 [ 28.949619] split_vma+0xc6/0x110 [ 28.949916] mprotect_fixup+0x8d2/0xb30 [ 28.950250] do_mprotect_pkey+0x87e/0xd40 [ 28.950599] __x64_sys_mprotect+0x78/0xc0 [ 28.950948] do_syscall_64+0x3f/0x90 [ 28.951271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.951706] [ 28.951858] Freed by task 210: [ 28.952120] kasan_save_stack+0x22/0x50 [ 28.952460] kasan_set_track+0x25/0x30 [ 28.952794] kasan_save_free_info+0x2b/0x50 [ 28.953183] __kasan_slab_free+0x10a/0x190 [ 28.953543] kmem_cache_free+0x10d/0x4d0 [ 28.953859] rcu_core+0x8c8/0x2860 [ 28.954148] __do_softirq+0x1b7/0x7d4 [ 28.954470] [ 28.954616] Last potentially related work creation: [ 28.955002] kasan_save_stack+0x22/0x50 [ 28.955342] __kasan_record_aux_stack+0x8e/0xa0 [ 28.955725] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.956155] remove_vma+0x139/0x170 [ 28.956461] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.956836] do_vmi_munmap+0x1f1/0x2b0 [ 28.957172] __vm_munmap+0x138/0x3a0 [ 28.957495] __x64_sys_munmap+0x59/0x80 [ 28.957834] do_syscall_64+0x3f/0x90 [ 28.958158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.958587] [ 28.958737] Second to last potentially related work creation: [ 28.959192] kasan_save_stack+0x22/0x50 [ 28.959534] __kasan_record_aux_stack+0x8e/0xa0 [ 28.959922] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.960352] remove_vma+0x139/0x170 [ 28.960653] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.961033] do_vmi_munmap+0x1f1/0x2b0 [ 28.961394] mmap_region+0x1f9/0x2660 [ 28.961719] do_mmap+0x854/0xf00 [ 28.962013] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.962331] ksys_mmap_pgoff+0x3af/0x500 [ 28.962653] do_syscall_64+0x3f/0x90 [ 28.962958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.963374] [ 28.963523] The buggy address belongs to the object at ffff88800d48ae80 [ 28.963523] which belongs to the cache vm_area_struct of size 168 [ 28.964482] The buggy address is located 88 bytes inside of [ 28.964482] freed 168-byte region [ffff88800d48ae80, ffff88800d48af28) [ 28.965421] [ 28.965571] The buggy address belongs to the physical page: [ 28.966011] page:00000000ae482d15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd48a [ 28.966725] memcg:ffff88800d32a801 [ 28.967010] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.967474] page_type: 0xffffffff() [ 28.967779] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.968384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d32a801 [ 28.968979] page dumped because: kasan: bad access detected [ 28.969436] [ 28.969584] Memory state around the buggy address: [ 28.969980] ffff88800d48ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.970693] ffff88800d48ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.971264] >ffff88800d48ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.971827] ^ [ 28.972312] ffff88800d48af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 28.972887] ffff88800d48af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.973474] ================================================================== [ 28.974181] Disabling lock debugging due to kernel taint [ 31.391498] BUG: Bad rss-counter state mm:000000003f85f1df type:MM_FILEPAGES val:33 [ 31.392216] BUG: Bad rss-counter state mm:000000003f85f1df type:MM_ANONPAGES val:22 [ 31.904402] BUG: Bad rss-counter state mm:00000000744a3c37 type:MM_FILEPAGES val:33 [ 31.905057] BUG: Bad rss-counter state mm:00000000744a3c37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45705' (ECDSA) to the list of known hosts. 2023/06/21 08:15:49 fuzzer started 2023/06/21 08:15:49 dialing manager at localhost:36067 2023/06/21 08:15:49 checking machine... 2023/06/21 08:15:49 checking revisions... [ 32.806668] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:15:49 testing simple program... [ 32.867625] cgroup: Unknown subsys name 'net' [ 32.920313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:15:49 Registers: info registers vcpu 0 RAX=00000000b7c54385 RBX=000000001d54fc19 RCX=ffff88800ee5fa84 RDX=000000000000000d RSI=0000000000000005 RDI=00000000156c5bb3 RBP=ffffffff81ef10be RSP=ffff88800ee5f9c8 R8 =00000000792ffece R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff88800ee5fa30 R15=000000000000000d RIP=ffffffff82270457 RFL=00000002 [-------] 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 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=00007f7897d17e10 CR3=000000000dae6000 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=2038343a35313a3830203132206e754a XMM01=5d3735303530392e31332020205b203a XMM02=415f4d4d3a6570797420373363336134 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a35313a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffd4a906ff0 CR3=000000000e7da000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000