syzkaller login: [ 39.567509] BUG: Bad rss-counter state mm:000000005a09575a type:MM_FILEPAGES val:33 [ 39.568916] BUG: Bad rss-counter state mm:000000005a09575a type:MM_ANONPAGES val:22 [ 39.715971] ================================================================== [ 39.716986] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.717981] Read of size 8 at addr ffff88801a422968 by task sshd/219 [ 39.718789] [ 39.719087] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.720093] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.721065] Call Trace: [ 39.721389] <TASK> [ 39.721677] dump_stack_lvl+0x91/0xf0 [ 39.722160] print_report+0xcc/0x620 [ 39.722673] ? __virt_addr_valid+0x102/0x340 [ 39.723225] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.723845] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.724467] kasan_report+0xbe/0xf0 [ 39.724938] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.725552] vma_interval_tree_remove+0xc75/0xec0 [ 39.726148] vma_prepare+0xc54/0x11a0 [ 39.726631] __split_vma+0x5af/0x950 [ 39.727100] ? __pfx___split_vma+0x10/0x10 [ 39.727633] ? find_held_lock+0x2c/0x110 [ 39.728152] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.728721] ? lock_is_held_type+0x9f/0x120 [ 39.729266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.729868] ? mtree_range_walk+0x632/0x900 [ 39.730414] ? mas_walk+0x5c7/0x7c0 [ 39.730902] do_vmi_munmap+0x1f1/0x2b0 [ 39.731395] mmap_region+0x1f9/0x2660 [ 39.731873] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.732383] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.733105] ? __pfx_lock_acquire+0x10/0x10 [ 39.733638] ? __pfx_mmap_region+0x10/0x10 [ 39.734184] ? security_mmap_addr+0x7d/0xa0 [ 39.734738] ? get_unmapped_area+0x1f5/0x3f0 [ 39.735288] do_mmap+0x854/0xf00 [ 39.735725] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.736225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.736787] ksys_mmap_pgoff+0x3af/0x500 [ 39.737291] do_syscall_64+0x3f/0x90 [ 39.737767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.738414] RIP: 0033:0x7f04e7dded82 [ 39.738885] 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 [ 39.741003] RSP: 002b:00007ffeeaebf108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.741910] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04e7dded82 [ 39.742763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04e7218000 [ 39.743607] RBP: 00007f04e7218000 R08: 0000000000000009 R09: 0000000000001000 [ 39.744445] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f826e4d90 [ 39.745290] R13: 00007ffeeaebf120 R14: 00007ffeeaebf150 R15: 00007ffeeaebf4b0 [ 39.746139] </TASK> [ 39.746434] [ 39.746666] Allocated by task 212: [ 39.747096] kasan_save_stack+0x22/0x50 [ 39.747602] kasan_set_track+0x25/0x30 [ 39.748099] __kasan_slab_alloc+0x59/0x70 [ 39.748621] kmem_cache_alloc+0x16b/0x370 [ 39.749137] vm_area_dup+0x20/0x160 [ 39.749596] __split_vma+0x170/0x950 [ 39.750066] split_vma+0xc6/0x110 [ 39.750509] mprotect_fixup+0x8d2/0xb30 [ 39.751015] do_mprotect_pkey+0x87e/0xd40 [ 39.751541] __x64_sys_mprotect+0x78/0xc0 [ 39.752059] do_syscall_64+0x3f/0x90 [ 39.752535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.753177] [ 39.753394] Freed by task 212: [ 39.753787] kasan_save_stack+0x22/0x50 [ 39.754287] kasan_set_track+0x25/0x30 [ 39.754805] kasan_save_free_info+0x2b/0x50 [ 39.755328] __kasan_slab_free+0x10a/0x190 [ 39.755863] kmem_cache_free+0x10d/0x4d0 [ 39.756374] rcu_core+0x8c8/0x2860 [ 39.756816] __do_softirq+0x1b7/0x7d4 [ 39.757294] [ 39.757508] Last potentially related work creation: [ 39.758085] kasan_save_stack+0x22/0x50 [ 39.758603] __kasan_record_aux_stack+0x8e/0xa0 [ 39.759172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.759890] remove_vma+0x139/0x170 [ 39.760341] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.760910] do_vmi_munmap+0x1f1/0x2b0 [ 39.761391] __vm_munmap+0x138/0x3a0 [ 39.761860] __x64_sys_munmap+0x59/0x80 [ 39.762358] do_syscall_64+0x3f/0x90 [ 39.762845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.763484] [ 39.763696] The buggy address belongs to the object at ffff88801a422910 [ 39.763696] which belongs to the cache vm_area_struct of size 168 [ 39.765144] The buggy address is located 88 bytes inside of [ 39.765144] freed 168-byte region [ffff88801a422910, ffff88801a4229b8) [ 39.766534] [ 39.766755] The buggy address belongs to the physical page: [ 39.767416] page:000000003c1afbed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a422 [ 39.768497] memcg:ffff888009ed9c01 [ 39.768935] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.769637] page_type: 0xffffffff() [ 39.770085] raw: 0100000000000200 ffff88800879fc80 ffffea000064a640 dead000000000003 [ 39.771016] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ed9c01 [ 39.771922] page dumped because: kasan: bad access detected [ 39.772581] [ 39.772794] Memory state around the buggy address: [ 39.773383] ffff88801a422800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.774252] ffff88801a422880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.775124] >ffff88801a422900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.775975] ^ [ 39.776747] ffff88801a422980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.777609] ffff88801a422a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.778473] ================================================================== [ 39.779438] Disabling lock debugging due to kernel taint [ 41.827934] BUG: Bad rss-counter state mm:0000000055d15c78 type:MM_FILEPAGES val:33 [ 41.829143] BUG: Bad rss-counter state mm:0000000055d15c78 type:MM_ANONPAGES val:22 [ 42.235610] BUG: Bad rss-counter state mm:00000000666fd405 type:MM_FILEPAGES val:33 [ 42.236601] BUG: Bad rss-counter state mm:00000000666fd405 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5173' (ECDSA) to the list of known hosts. 2023/06/20 05:34:41 fuzzer started 2023/06/20 05:34:41 dialing manager at localhost:44161 2023/06/20 05:34:41 checking machine... 2023/06/20 05:34:41 checking revisions... [ 42.953524] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:34:41 testing simple program... [ 43.006059] cgroup: Unknown subsys name 'net' [ 43.055006] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:34:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f5dbf3e0bc0 CR3=0000000019f0c000 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=2030343a34333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a34333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888017810fa0 RBX=0000000000000008 RCX=0000000000000000 RDX=0000000000000001 RSI=ffff888016acf4f0 RDI=ffff888017810fa4 RBP=ffff888016acf4f0 RSP=ffff888016acf450 R8 =0000000000000003 R9 =0000000000000005 R10=ffff888017810fa5 R11=000009dc000009dc R12=ffff8880178a0dc0 R13=000000000000000b R14=ffff888016acf4f0 R15=0000000000000f20 RIP=ffffffff82246f32 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 00007fec19add900 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=00007ffd97cae000 CR3=000000000e73a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000