syzkaller login: [ 43.252796] BUG: Bad rss-counter state mm:000000005deb43c3 type:MM_FILEPAGES val:33 [ 43.253809] BUG: Bad rss-counter state mm:000000005deb43c3 type:MM_ANONPAGES val:22 [ 43.420686] ================================================================== [ 43.421603] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.422690] Read of size 8 at addr ffff88800e1783f8 by task sshd/218 [ 43.423492] [ 43.423726] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.424616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.425630] Call Trace: [ 43.425963] [ 43.426253] dump_stack_lvl+0x91/0xf0 [ 43.426753] print_report+0xcc/0x620 [ 43.427246] ? __virt_addr_valid+0x102/0x340 [ 43.427844] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.428479] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.429107] kasan_report+0xbe/0xf0 [ 43.429593] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.430211] vma_interval_tree_remove+0xc75/0xec0 [ 43.430814] vma_prepare+0xc54/0x11a0 [ 43.431300] __split_vma+0x5af/0x950 [ 43.431787] ? __pfx___split_vma+0x10/0x10 [ 43.432317] ? find_held_lock+0x2c/0x110 [ 43.432839] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.433410] ? lock_is_held_type+0x9f/0x120 [ 43.433954] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.434565] ? mtree_range_walk+0x632/0x900 [ 43.435117] ? mas_walk+0x5c7/0x7c0 [ 43.435612] do_vmi_munmap+0x1f1/0x2b0 [ 43.436103] mmap_region+0x1f9/0x2660 [ 43.436590] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.437107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.437834] ? __pfx_lock_acquire+0x10/0x10 [ 43.438361] ? __pfx_mmap_region+0x10/0x10 [ 43.438895] ? security_mmap_addr+0x7d/0xa0 [ 43.439436] ? get_unmapped_area+0x1f5/0x3f0 [ 43.440011] do_mmap+0x854/0xf00 [ 43.440463] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.440966] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.441537] ksys_mmap_pgoff+0x3af/0x500 [ 43.442042] do_syscall_64+0x3f/0x90 [ 43.442522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.443173] RIP: 0033:0x7f69ff381d82 [ 43.443656] 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 [ 43.445789] RSP: 002b:00007fff48e6d198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.446705] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69ff381d82 [ 43.447580] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69fe7bb000 [ 43.448458] RBP: 00007f69fe7bb000 R08: 0000000000000009 R09: 0000000000001000 [ 43.449329] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564763bc0ec0 [ 43.450190] R13: 00007fff48e6d1b0 R14: 00007fff48e6d1e0 R15: 00007fff48e6d540 [ 43.451070] [ 43.451367] [ 43.451603] Allocated by task 211: [ 43.452046] kasan_save_stack+0x22/0x50 [ 43.452568] kasan_set_track+0x25/0x30 [ 43.453069] __kasan_slab_alloc+0x59/0x70 [ 43.453602] kmem_cache_alloc+0x16b/0x370 [ 43.454128] vm_area_dup+0x20/0x160 [ 43.454586] __split_vma+0x170/0x950 [ 43.455069] split_vma+0xc6/0x110 [ 43.455529] mprotect_fixup+0x8d2/0xb30 [ 43.456046] do_mprotect_pkey+0x87e/0xd40 [ 43.456572] __x64_sys_mprotect+0x78/0xc0 [ 43.457096] do_syscall_64+0x3f/0x90 [ 43.457584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.458236] [ 43.458454] Freed by task 19: [ 43.458840] kasan_save_stack+0x22/0x50 [ 43.459352] kasan_set_track+0x25/0x30 [ 43.459860] kasan_save_free_info+0x2b/0x50 [ 43.460396] __kasan_slab_free+0x10a/0x190 [ 43.460936] kmem_cache_free+0x10d/0x4d0 [ 43.461452] rcu_core+0x8c8/0x2860 [ 43.461899] __do_softirq+0x1b7/0x7d4 [ 43.462376] [ 43.462594] Last potentially related work creation: [ 43.463195] kasan_save_stack+0x22/0x50 [ 43.463730] __kasan_record_aux_stack+0x8e/0xa0 [ 43.464314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.464970] remove_vma+0x139/0x170 [ 43.465434] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.466000] do_vmi_munmap+0x1f1/0x2b0 [ 43.466505] __vm_munmap+0x138/0x3a0 [ 43.466980] __x64_sys_munmap+0x59/0x80 [ 43.467490] do_syscall_64+0x3f/0x90 [ 43.467985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.468642] [ 43.468865] The buggy address belongs to the object at ffff88800e1783a0 [ 43.468865] which belongs to the cache vm_area_struct of size 168 [ 43.470380] The buggy address is located 88 bytes inside of [ 43.470380] freed 168-byte region [ffff88800e1783a0, ffff88800e178448) [ 43.471836] [ 43.472059] The buggy address belongs to the physical page: [ 43.472739] page:00000000f50d6f8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe178 [ 43.473831] memcg:ffff88800eda8f01 [ 43.474256] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.474969] page_type: 0xffffffff() [ 43.475424] raw: 0100000000000200 ffff88800879fc80 ffffea00003ab640 dead000000000003 [ 43.476371] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eda8f01 [ 43.477281] page dumped because: kasan: bad access detected [ 43.477942] [ 43.478140] Memory state around the buggy address: [ 43.478676] ffff88800e178280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 43.479474] ffff88800e178300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 43.480351] >ffff88800e178380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.481222] ^ [ 43.482084] ffff88800e178400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.482964] ffff88800e178480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.483848] ================================================================== [ 43.484911] Disabling lock debugging due to kernel taint [ 45.409355] BUG: Bad rss-counter state mm:000000006b62106a type:MM_FILEPAGES val:33 [ 45.410370] BUG: Bad rss-counter state mm:000000006b62106a type:MM_ANONPAGES val:22 [ 45.915115] BUG: Bad rss-counter state mm:000000003c2428a0 type:MM_FILEPAGES val:33 [ 45.916142] BUG: Bad rss-counter state mm:000000003c2428a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42105' (ECDSA) to the list of known hosts. 2023/06/19 12:09:32 fuzzer started 2023/06/19 12:09:32 dialing manager at localhost:44161 2023/06/19 12:09:32 checking machine... 2023/06/19 12:09:32 checking revisions... [ 46.554954] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:09:32 testing simple program... [ 46.598104] cgroup: Unknown subsys name 'net' [ 46.651439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:09:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450b6f3 RSP=ffff888016caff00 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007f7e95a97650 R15=0000000000000000 RIP=ffffffff8135b905 RFL=00000086 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7e954e2900 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=00007f7e95a97650 CR3=0000000019074000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e1353 RSI=ffff888008e27db0 RDI=ffff88806cf09ae8 RBP=ffff88806cf09b30 RSP=ffff88806cf09a98 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88801a20b8d0 RIP=ffffffff810bd057 RFL=00000296 [--S-AP-] 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=00007ffd5e9cdff8 CR3=000000000c692000 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=2032333a39303a3231203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a39303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000