syzkaller login: [ 38.862183] BUG: Bad rss-counter state mm:00000000191c342f type:MM_FILEPAGES val:33 [ 38.863468] BUG: Bad rss-counter state mm:00000000191c342f type:MM_ANONPAGES val:22 [ 38.903713] ================================================================== [ 38.904707] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.905750] Read of size 8 at addr ffff88800dfdfb38 by task sshd/218 [ 38.906551] [ 38.906861] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.907750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.908780] Call Trace: [ 38.909136] [ 38.909453] dump_stack_lvl+0x91/0xf0 [ 38.909946] print_report+0xcc/0x620 [ 38.910467] ? __virt_addr_valid+0x102/0x340 [ 38.911072] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.911786] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.912607] kasan_report+0xbe/0xf0 [ 38.913376] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914155] vma_interval_tree_remove+0xc75/0xec0 [ 38.915113] vma_prepare+0xc54/0x11a0 [ 38.915705] __split_vma+0x5af/0x950 [ 38.916280] ? __pfx___split_vma+0x10/0x10 [ 38.916929] ? find_held_lock+0x2c/0x110 [ 38.917582] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.918279] ? lock_is_held_type+0x9f/0x120 [ 38.918944] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.919713] ? mtree_range_walk+0x632/0x900 [ 38.920393] ? mas_walk+0x5c7/0x7c0 [ 38.920981] do_vmi_munmap+0x1f1/0x2b0 [ 38.921590] mmap_region+0x1f9/0x2660 [ 38.922172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.922794] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.923696] ? __pfx_lock_acquire+0x10/0x10 [ 38.924355] ? __pfx_mmap_region+0x10/0x10 [ 38.925021] ? security_mmap_addr+0x7d/0xa0 [ 38.925674] ? get_unmapped_area+0x1f5/0x3f0 [ 38.926353] do_mmap+0x854/0xf00 [ 38.926897] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.927509] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.928209] ksys_mmap_pgoff+0x3af/0x500 [ 38.928841] do_syscall_64+0x3f/0x90 [ 38.929425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930211] RIP: 0033:0x7f9c8e55dd82 [ 38.930766] 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 [ 38.933408] RSP: 002b:00007fff826f8348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.934505] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c8e55dd82 [ 38.935563] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c8d997000 [ 38.936620] RBP: 00007f9c8d997000 R08: 0000000000000009 R09: 0000000000001000 [ 38.937700] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9e2c14f70 [ 38.938768] R13: 00007fff826f8360 R14: 00007fff826f8390 R15: 00007fff826f86f0 [ 38.939744] [ 38.940031] [ 38.940240] Allocated by task 211: [ 38.940653] kasan_save_stack+0x22/0x50 [ 38.941130] kasan_set_track+0x25/0x30 [ 38.941600] __kasan_slab_alloc+0x59/0x70 [ 38.942093] kmem_cache_alloc+0x16b/0x370 [ 38.942580] vm_area_dup+0x20/0x160 [ 38.943017] __split_vma+0x170/0x950 [ 38.943483] split_vma+0xc6/0x110 [ 38.943905] mprotect_fixup+0x8d2/0xb30 [ 38.944385] do_mprotect_pkey+0x87e/0xd40 [ 38.944885] __x64_sys_mprotect+0x78/0xc0 [ 38.945385] do_syscall_64+0x3f/0x90 [ 38.945843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.946460] [ 38.946669] Freed by task 211: [ 38.947045] kasan_save_stack+0x22/0x50 [ 38.947526] kasan_set_track+0x25/0x30 [ 38.947992] kasan_save_free_info+0x2b/0x50 [ 38.948573] __kasan_slab_free+0x10a/0x190 [ 38.949074] kmem_cache_free+0x10d/0x4d0 [ 38.949560] rcu_core+0x8c8/0x2860 [ 38.949986] __do_softirq+0x1b7/0x7d4 [ 38.950468] [ 38.950686] Last potentially related work creation: [ 38.951274] kasan_save_stack+0x22/0x50 [ 38.951796] __kasan_record_aux_stack+0x8e/0xa0 [ 38.952372] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.953005] remove_vma+0x139/0x170 [ 38.953456] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.954011] do_vmi_munmap+0x1f1/0x2b0 [ 38.954496] __vm_munmap+0x138/0x3a0 [ 38.954972] __x64_sys_munmap+0x59/0x80 [ 38.955472] do_syscall_64+0x3f/0x90 [ 38.955956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956578] [ 38.956793] Second to last potentially related work creation: [ 38.957479] kasan_save_stack+0x22/0x50 [ 38.957976] __kasan_record_aux_stack+0x8e/0xa0 [ 38.958547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.959188] remove_vma+0x139/0x170 [ 38.959648] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.960201] do_vmi_munmap+0x1f1/0x2b0 [ 38.960689] mmap_region+0x1f9/0x2660 [ 38.961170] do_mmap+0x854/0xf00 [ 38.961599] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.962087] ksys_mmap_pgoff+0x3af/0x500 [ 38.962581] do_syscall_64+0x3f/0x90 [ 38.963057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963719] [ 38.963936] The buggy address belongs to the object at ffff88800dfdfae0 [ 38.963936] which belongs to the cache vm_area_struct of size 168 [ 38.965407] The buggy address is located 88 bytes inside of [ 38.965407] freed 168-byte region [ffff88800dfdfae0, ffff88800dfdfb88) [ 38.966802] [ 38.967012] The buggy address belongs to the physical page: [ 38.967680] page:00000000d9c6dc42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfdf [ 38.968753] memcg:ffff88800c8d8e01 [ 38.969175] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.969875] page_type: 0xffffffff() [ 38.970325] raw: 0100000000000200 ffff8880087a0c80 ffffea0000383080 dead00000000000f [ 38.971245] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8d8e01 [ 38.972158] page dumped because: kasan: bad access detected [ 38.972819] [ 38.973033] Memory state around the buggy address: [ 38.973609] ffff88800dfdfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.974463] ffff88800dfdfa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.975326] >ffff88800dfdfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.976190] ^ [ 38.976804] ffff88800dfdfb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.977657] ffff88800dfdfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.978505] ================================================================== [ 38.979451] Disabling lock debugging due to kernel taint [ 42.185364] BUG: Bad rss-counter state mm:0000000050e372e5 type:MM_FILEPAGES val:33 [ 42.186534] BUG: Bad rss-counter state mm:0000000050e372e5 type:MM_ANONPAGES val:22 [ 42.607291] BUG: Bad rss-counter state mm:0000000041308e1d type:MM_FILEPAGES val:33 [ 42.608285] BUG: Bad rss-counter state mm:0000000041308e1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31306' (ECDSA) to the list of known hosts. 2023/06/20 13:40:02 fuzzer started 2023/06/20 13:40:02 dialing manager at localhost:36067 2023/06/20 13:40:02 checking machine... 2023/06/20 13:40:02 checking revisions... [ 43.351416] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:40:02 testing simple program... [ 43.397104] cgroup: Unknown subsys name 'net' [ 43.449630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:40:02 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff88800f408000 RCX=0000000000000100 RDX=000000000001c062 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800f408180 RSP=ffff88806ce09de8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=ffff88806ce09ff8 R12=000000000001c062 R13=ffff88800f40c4c8 R14=0000000000000000 R15=ffff88800f408008 RIP=ffffffff8219168f RFL=00000046 [---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 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=000055cadc657768 CR3=000000001beb8000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f52f920 RCX=0000000000000000 RDX=ffff88800f520000 RSI=ffffffff81930e71 RDI=0000000000000001 RBP=ffffea0000717fc0 RSP=ffff88800f52f158 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000012 R11=0000000000009293 R12=0000000000001000 R13=0000000000000012 R14=ffffea0000717fc0 R15=ffff88801b9ef2b8 RIP=ffffffff814c0880 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 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=00007ffd650f1cb8 CR3=0000000019984000 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=2031303a30343a3331203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a343933373520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a30343a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000