syzkaller login: [ 39.872687] BUG: Bad rss-counter state mm:00000000ac5a7138 type:MM_FILEPAGES val:33 [ 39.874017] BUG: Bad rss-counter state mm:00000000ac5a7138 type:MM_ANONPAGES val:22 [ 39.917390] ================================================================== [ 39.918286] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.919249] Read of size 8 at addr ffff88800e46d968 by task sshd/219 [ 39.920022] [ 39.920240] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.921206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.922187] Call Trace: [ 39.922518] [ 39.922831] dump_stack_lvl+0x91/0xf0 [ 39.923324] print_report+0xcc/0x620 [ 39.923816] ? __virt_addr_valid+0x102/0x340 [ 39.924367] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.924988] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.925608] kasan_report+0xbe/0xf0 [ 39.926090] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.926718] vma_interval_tree_remove+0xc75/0xec0 [ 39.927329] vma_prepare+0xc54/0x11a0 [ 39.927832] __split_vma+0x5af/0x950 [ 39.928308] ? __pfx___split_vma+0x10/0x10 [ 39.928841] ? find_held_lock+0x2c/0x110 [ 39.929376] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.929944] ? lock_is_held_type+0x9f/0x120 [ 39.930478] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.931088] ? mtree_range_walk+0x632/0x900 [ 39.931658] ? mas_walk+0x5c7/0x7c0 [ 39.932137] do_vmi_munmap+0x1f1/0x2b0 [ 39.932637] mmap_region+0x1f9/0x2660 [ 39.933122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.933635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.934358] ? __pfx_lock_acquire+0x10/0x10 [ 39.934895] ? __pfx_mmap_region+0x10/0x10 [ 39.935428] ? security_mmap_addr+0x7d/0xa0 [ 39.935983] ? get_unmapped_area+0x1f5/0x3f0 [ 39.936539] do_mmap+0x854/0xf00 [ 39.936983] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.937481] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.938041] ksys_mmap_pgoff+0x3af/0x500 [ 39.938556] do_syscall_64+0x3f/0x90 [ 39.939038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.939710] RIP: 0033:0x7f90f1f7fd82 [ 39.940170] 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 [ 39.942353] RSP: 002b:00007fff503326a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.943252] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90f1f7fd82 [ 39.944115] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90f13b9000 [ 39.944961] RBP: 00007f90f13b9000 R08: 0000000000000009 R09: 0000000000001000 [ 39.945816] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559210847ec0 [ 39.946667] R13: 00007fff503326c0 R14: 00007fff503326f0 R15: 00007fff50332a50 [ 39.947548] [ 39.947841] [ 39.948058] Allocated by task 212: [ 39.948488] kasan_save_stack+0x22/0x50 [ 39.949002] kasan_set_track+0x25/0x30 [ 39.949503] __kasan_slab_alloc+0x59/0x70 [ 39.950027] kmem_cache_alloc+0x16b/0x370 [ 39.950546] vm_area_dup+0x20/0x160 [ 39.951008] __split_vma+0x170/0x950 [ 39.951480] split_vma+0xc6/0x110 [ 39.951918] mprotect_fixup+0x8d2/0xb30 [ 39.952421] do_mprotect_pkey+0x87e/0xd40 [ 39.952941] __x64_sys_mprotect+0x78/0xc0 [ 39.953458] do_syscall_64+0x3f/0x90 [ 39.953938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.954585] [ 39.954807] Freed by task 212: [ 39.955203] kasan_save_stack+0x22/0x50 [ 39.955727] kasan_set_track+0x25/0x30 [ 39.956218] kasan_save_free_info+0x2b/0x50 [ 39.956754] __kasan_slab_free+0x10a/0x190 [ 39.957283] kmem_cache_free+0x10d/0x4d0 [ 39.957793] rcu_core+0x8c8/0x2860 [ 39.958238] __do_softirq+0x1b7/0x7d4 [ 39.958714] [ 39.958932] Last potentially related work creation: [ 39.959516] kasan_save_stack+0x22/0x50 [ 39.960014] __kasan_record_aux_stack+0x8e/0xa0 [ 39.960594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.961235] remove_vma+0x139/0x170 [ 39.961689] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.962252] do_vmi_munmap+0x1f1/0x2b0 [ 39.962737] __vm_munmap+0x138/0x3a0 [ 39.963214] __x64_sys_munmap+0x59/0x80 [ 39.963718] do_syscall_64+0x3f/0x90 [ 39.964200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.964842] [ 39.965055] The buggy address belongs to the object at ffff88800e46d910 [ 39.965055] which belongs to the cache vm_area_struct of size 168 [ 39.966637] The buggy address is located 88 bytes inside of [ 39.966637] freed 168-byte region [ffff88800e46d910, ffff88800e46d9b8) [ 39.968067] [ 39.968290] The buggy address belongs to the physical page: [ 39.968958] page:00000000338e1667 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe46d [ 39.970063] memcg:ffff88800e13b101 [ 39.970498] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.971208] page_type: 0xffffffff() [ 39.971667] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.972600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e13b101 [ 39.973519] page dumped because: kasan: bad access detected [ 39.974179] [ 39.974398] Memory state around the buggy address: [ 39.974974] ffff88800e46d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.975841] ffff88800e46d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.976711] >ffff88800e46d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.977569] ^ [ 39.978347] ffff88800e46d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.979201] ffff88800e46da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.980064] ================================================================== [ 39.981017] Disabling lock debugging due to kernel taint [ 41.922738] BUG: Bad rss-counter state mm:0000000074ea35fe type:MM_FILEPAGES val:33 [ 41.923763] BUG: Bad rss-counter state mm:0000000074ea35fe type:MM_ANONPAGES val:22 [ 42.365734] BUG: Bad rss-counter state mm:00000000456ce5a6 type:MM_FILEPAGES val:33 [ 42.366723] BUG: Bad rss-counter state mm:00000000456ce5a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59046' (ECDSA) to the list of known hosts. 2023/06/19 20:28:16 fuzzer started 2023/06/19 20:28:16 dialing manager at localhost:44161 2023/06/19 20:28:16 checking machine... 2023/06/19 20:28:16 checking revisions... [ 43.140243] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:28:17 testing simple program... [ 43.184605] cgroup: Unknown subsys name 'net' [ 43.249522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:28:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ea9e7e0 RCX=ffff8880087b63c0 RDX=ffffea0000669400 RSI=ffff888009816580 RDI=ffff888008441780 RBP=0000000000000000 RSP=ffff88801858fb48 R8 =ffff888019a50000 R9 =0000000000000000 R10=ffffea0000260580 R11=000000008020001d R12=dffffc0000000000 R13=ffff88801858fb88 R14=ffff8880087b63c0 R15=ffff888009816580 RIP=ffffffff81810196 RFL=00000202 [-------] 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=00007f0bb26e4260 CR3=00000000186c2000 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=756e696c2d34365f3638782f62696c2f XMM01=2e766c6f73657262696c2f756e672d78 XMM02=00322e6f732e766c6f73657262696c2f XMM03=756e672d78756e696c2d34365f363878 XMM04=00000000000000000000000000000000 XMM05=00007f0bb2c27f6000007f0bb2a0af30 XMM06=00007f0bb2a0aa2000007f0bb2a0a510 XMM07=00007f0bb2a0a00000007f0bb2c28a20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180c521 RDX=00000000000080c5 RSI=00000000000080c5 RDI=ffffffff86507ed4 RBP=ffff88800f147430 RSP=ffff88800f147368 R8 =0000000000000000 R9 =ffff88800f147418 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800f147438 R13=ffff88800f147420 R14=ffff88800f147419 R15=ffff88800f1473d8 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 00007f00ac1d6900 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=00007f00ac78b650 CR3=0000000016f4e000 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=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