syzkaller login: [ 35.469782] BUG: Bad rss-counter state mm:00000000f8b6c4ff type:MM_FILEPAGES val:33 [ 35.471088] BUG: Bad rss-counter state mm:00000000f8b6c4ff type:MM_ANONPAGES val:22 [ 35.629048] ================================================================== [ 35.629996] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.630995] Read of size 8 at addr ffff88801bc2dd08 by task sshd/219 [ 35.631823] [ 35.632061] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.633125] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.634215] Call Trace: [ 35.634581] [ 35.634925] dump_stack_lvl+0x91/0xf0 [ 35.635472] print_report+0xcc/0x620 [ 35.636013] ? __virt_addr_valid+0x102/0x340 [ 35.636622] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.637306] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.637995] kasan_report+0xbe/0xf0 [ 35.638522] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.639241] vma_interval_tree_remove+0xc75/0xec0 [ 35.639913] vma_prepare+0xc54/0x11a0 [ 35.640444] __split_vma+0x5af/0x950 [ 35.640967] ? __pfx___split_vma+0x10/0x10 [ 35.641555] ? find_held_lock+0x2c/0x110 [ 35.642131] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.642768] ? lock_is_held_type+0x9f/0x120 [ 35.643366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.644046] ? mtree_range_walk+0x632/0x900 [ 35.644654] ? mas_walk+0x5c7/0x7c0 [ 35.645183] do_vmi_munmap+0x1f1/0x2b0 [ 35.645730] mmap_region+0x1f9/0x2660 [ 35.646266] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.646850] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.647639] ? __pfx_lock_acquire+0x10/0x10 [ 35.648235] ? __pfx_mmap_region+0x10/0x10 [ 35.648821] ? security_mmap_addr+0x7d/0xa0 [ 35.649413] ? get_unmapped_area+0x1f5/0x3f0 [ 35.650027] do_mmap+0x854/0xf00 [ 35.650513] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.651085] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.651708] ksys_mmap_pgoff+0x3af/0x500 [ 35.652271] do_syscall_64+0x3f/0x90 [ 35.652807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.653532] RIP: 0033:0x7f7022cf8d82 [ 35.654043] 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 [ 35.656418] RSP: 002b:00007ffd13431e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.657430] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7022cf8d82 [ 35.658370] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7022132000 [ 35.659323] RBP: 00007f7022132000 R08: 0000000000000009 R09: 0000000000001000 [ 35.660267] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b48f9dec0 [ 35.661204] R13: 00007ffd13431e60 R14: 00007ffd13431e90 R15: 00007ffd134321f0 [ 35.662153] [ 35.662476] [ 35.662730] Allocated by task 212: [ 35.663210] kasan_save_stack+0x22/0x50 [ 35.663769] kasan_set_track+0x25/0x30 [ 35.664315] __kasan_slab_alloc+0x59/0x70 [ 35.664900] kmem_cache_alloc+0x16b/0x370 [ 35.665471] vm_area_dup+0x20/0x160 [ 35.665973] __split_vma+0x170/0x950 [ 35.666493] split_vma+0xc6/0x110 [ 35.666991] mprotect_fixup+0x8d2/0xb30 [ 35.667542] do_mprotect_pkey+0x87e/0xd40 [ 35.668123] __x64_sys_mprotect+0x78/0xc0 [ 35.668706] do_syscall_64+0x3f/0x90 [ 35.669231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.669950] [ 35.670190] Freed by task 212: [ 35.670638] kasan_save_stack+0x22/0x50 [ 35.671206] kasan_set_track+0x25/0x30 [ 35.671755] kasan_save_free_info+0x2b/0x50 [ 35.672346] __kasan_slab_free+0x10a/0x190 [ 35.672940] kmem_cache_free+0x10d/0x4d0 [ 35.673505] rcu_core+0x8c8/0x2860 [ 35.674000] __do_softirq+0x1b7/0x7d4 [ 35.674532] [ 35.674801] Last potentially related work creation: [ 35.675456] kasan_save_stack+0x22/0x50 [ 35.676021] __kasan_record_aux_stack+0x8e/0xa0 [ 35.676659] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.677377] remove_vma+0x139/0x170 [ 35.677882] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.678499] do_vmi_munmap+0x1f1/0x2b0 [ 35.679049] __vm_munmap+0x138/0x3a0 [ 35.679569] __x64_sys_munmap+0x59/0x80 [ 35.680116] do_syscall_64+0x3f/0x90 [ 35.680645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.681360] [ 35.681596] The buggy address belongs to the object at ffff88801bc2dcb0 [ 35.681596] which belongs to the cache vm_area_struct of size 168 [ 35.683247] The buggy address is located 88 bytes inside of [ 35.683247] freed 168-byte region [ffff88801bc2dcb0, ffff88801bc2dd58) [ 35.684816] [ 35.685055] The buggy address belongs to the physical page: [ 35.685792] page:000000008c6ccc74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc2d [ 35.687034] memcg:ffff88800f278501 [ 35.687504] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.688227] page_type: 0xffffffff() [ 35.688732] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.689763] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f278501 [ 35.690784] page dumped because: kasan: bad access detected [ 35.691522] [ 35.691762] Memory state around the buggy address: [ 35.692408] ffff88801bc2dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.693359] ffff88801bc2dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.694299] >ffff88801bc2dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.695260] ^ [ 35.695752] ffff88801bc2dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.696707] ffff88801bc2de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.697661] ================================================================== [ 35.698910] Disabling lock debugging due to kernel taint [ 37.680949] BUG: Bad rss-counter state mm:000000007d9e0d6e type:MM_FILEPAGES val:33 [ 37.681935] BUG: Bad rss-counter state mm:000000007d9e0d6e type:MM_ANONPAGES val:22 [ 38.260446] BUG: Bad rss-counter state mm:000000009216b712 type:MM_FILEPAGES val:33 [ 38.261673] BUG: Bad rss-counter state mm:000000009216b712 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62379' (ECDSA) to the list of known hosts. 2023/06/20 03:51:49 fuzzer started 2023/06/20 03:51:49 dialing manager at localhost:44161 2023/06/20 03:51:49 checking machine... 2023/06/20 03:51:49 checking revisions... [ 38.869811] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:51:49 testing simple program... [ 38.908250] cgroup: Unknown subsys name 'net' [ 38.966061] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:51:44 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=00007f08cf2f1a20 CR3=000000000eeb4000 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=1e326a880de5fabc3247bffb5b875716 XMM02=2c67c8bc2e329bc3000000000011cbd0 XMM03=fb795ef6d65770560000000000123d68 XMM04=08444a5a890c791800000000000ae988 XMM05=6d25384d849df09e0000000000134a20 XMM06=dfcdbad4f1609c370000000000133b18 XMM07=139997807ff5a44200000000001256e8 XMM08=e042d86d42eb936e0000000000123fe8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=1ffff1100fffb000 RSI=ffffffff81143243 RDI=0000000000000006 RBP=00000000147e0000 RSP=ffff88801399f848 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=0000000000000000 R12=ffff88807ffd8000 R13=ffff88807ffd8000 R14=0000000000000000 R15=ffff88801af74000 RIP=ffffffff8114325d 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 00007fcb4b6a1900 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=00007fff85583000 CR3=000000000ec3c000 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