syzkaller login: [ 25.705295] BUG: Bad rss-counter state mm:0000000073c00e0f type:MM_FILEPAGES val:33 [ 25.706653] BUG: Bad rss-counter state mm:0000000073c00e0f type:MM_ANONPAGES val:22 [ 25.864743] ================================================================== [ 25.865653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.866663] Read of size 8 at addr ffff8880096dba50 by task sshd/219 [ 25.867618] [ 25.867838] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.868689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.869671] Call Trace: [ 25.869991] [ 25.870273] dump_stack_lvl+0x91/0xf0 [ 25.870762] print_report+0xcc/0x620 [ 25.871255] ? __virt_addr_valid+0x102/0x340 [ 25.871801] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.872418] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.873023] kasan_report+0xbe/0xf0 [ 25.873494] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.874103] vma_interval_tree_remove+0xc75/0xec0 [ 25.874709] vma_prepare+0xc54/0x11a0 [ 25.875213] __split_vma+0x5af/0x950 [ 25.875684] ? __pfx___split_vma+0x10/0x10 [ 25.876205] ? find_held_lock+0x2c/0x110 [ 25.876718] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.877274] ? lock_is_held_type+0x9f/0x120 [ 25.877802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.878402] ? mtree_range_walk+0x632/0x900 [ 25.878944] ? mas_walk+0x5c7/0x7c0 [ 25.879423] do_vmi_munmap+0x1f1/0x2b0 [ 25.879916] mmap_region+0x1f9/0x2660 [ 25.880401] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.880906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.881609] ? __pfx_lock_acquire+0x10/0x10 [ 25.882133] ? __pfx_mmap_region+0x10/0x10 [ 25.882663] ? security_mmap_addr+0x7d/0xa0 [ 25.883202] ? get_unmapped_area+0x1f5/0x3f0 [ 25.883752] do_mmap+0x854/0xf00 [ 25.884186] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.884677] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.885232] ksys_mmap_pgoff+0x3af/0x500 [ 25.885731] do_syscall_64+0x3f/0x90 [ 25.886205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.886842] RIP: 0033:0x7faf4a173d82 [ 25.887301] 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 [ 25.889402] RSP: 002b:00007ffe1cdcd208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.890301] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf4a173d82 [ 25.891138] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf495ad000 [ 25.891974] RBP: 00007faf495ad000 R08: 0000000000000009 R09: 0000000000001000 [ 25.892803] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561675c25f70 [ 25.893636] R13: 00007ffe1cdcd220 R14: 00007ffe1cdcd250 R15: 00007ffe1cdcd5b0 [ 25.894486] [ 25.894774] [ 25.894986] Allocated by task 212: [ 25.895427] kasan_save_stack+0x22/0x50 [ 25.895927] kasan_set_track+0x25/0x30 [ 25.896417] __kasan_slab_alloc+0x59/0x70 [ 25.896943] kmem_cache_alloc+0x16b/0x370 [ 25.897449] vm_area_dup+0x20/0x160 [ 25.897897] __split_vma+0x170/0x950 [ 25.898356] split_vma+0xc6/0x110 [ 25.898796] mprotect_fixup+0x8d2/0xb30 [ 25.899297] do_mprotect_pkey+0x87e/0xd40 [ 25.899810] __x64_sys_mprotect+0x78/0xc0 [ 25.900328] do_syscall_64+0x3f/0x90 [ 25.900796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.901428] [ 25.901641] Freed by task 212: [ 25.902031] kasan_save_stack+0x22/0x50 [ 25.902527] kasan_set_track+0x25/0x30 [ 25.903013] kasan_save_free_info+0x2b/0x50 [ 25.903559] __kasan_slab_free+0x10a/0x190 [ 25.904086] kmem_cache_free+0x10d/0x4d0 [ 25.904586] rcu_core+0x8c8/0x2860 [ 25.905028] __do_softirq+0x1b7/0x7d4 [ 25.905496] [ 25.905707] Last potentially related work creation: [ 25.906287] kasan_save_stack+0x22/0x50 [ 25.906786] __kasan_record_aux_stack+0x8e/0xa0 [ 25.907362] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.907997] remove_vma+0x139/0x170 [ 25.908443] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.908996] do_vmi_munmap+0x1f1/0x2b0 [ 25.909486] __vm_munmap+0x138/0x3a0 [ 25.909970] __x64_sys_munmap+0x59/0x80 [ 25.910477] do_syscall_64+0x3f/0x90 [ 25.910982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.911644] [ 25.911859] Second to last potentially related work creation: [ 25.912541] kasan_save_stack+0x22/0x50 [ 25.913042] __kasan_record_aux_stack+0x8e/0xa0 [ 25.913610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.914252] remove_vma+0x139/0x170 [ 25.914705] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.915266] do_vmi_munmap+0x1f1/0x2b0 [ 25.915746] __vm_munmap+0x138/0x3a0 [ 25.916212] elf_map+0x26f/0x310 [ 25.916653] load_elf_binary+0x3417/0x5030 [ 25.917181] bprm_execve+0x803/0x1940 [ 25.917648] do_execveat_common+0x734/0x8e0 [ 25.918171] __x64_sys_execve+0x93/0xc0 [ 25.918658] do_syscall_64+0x3f/0x90 [ 25.919127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.919789] [ 25.920002] The buggy address belongs to the object at ffff8880096db9f8 [ 25.920002] which belongs to the cache vm_area_struct of size 168 [ 25.921461] The buggy address is located 88 bytes inside of [ 25.921461] freed 168-byte region [ffff8880096db9f8, ffff8880096dbaa0) [ 25.922852] [ 25.923067] The buggy address belongs to the physical page: [ 25.923731] page:00000000aa33b5fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96db [ 25.924809] memcg:ffff88800d1f4c01 [ 25.925234] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.925879] page_type: 0xffffffff() [ 25.926327] raw: 0100000000000200 ffff88800879fc80 ffffea00003bbd00 dead000000000004 [ 25.927248] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1f4c01 [ 25.928163] page dumped because: kasan: bad access detected [ 25.928821] [ 25.929035] Memory state around the buggy address: [ 25.929616] ffff8880096db900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.930467] ffff8880096db980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 25.931346] >ffff8880096dba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.932181] ^ [ 25.932876] ffff8880096dba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 25.933729] ffff8880096dbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.934576] ================================================================== [ 25.935638] Disabling lock debugging due to kernel taint [ 27.883281] BUG: Bad rss-counter state mm:000000006a7e9d1e type:MM_FILEPAGES val:33 [ 27.884577] BUG: Bad rss-counter state mm:000000006a7e9d1e type:MM_ANONPAGES val:22 [ 28.373720] BUG: Bad rss-counter state mm:00000000ff74a63d type:MM_FILEPAGES val:33 [ 28.374850] BUG: Bad rss-counter state mm:00000000ff74a63d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6276' (ECDSA) to the list of known hosts. 2023/06/20 05:07:49 fuzzer started 2023/06/20 05:07:49 dialing manager at localhost:44161 2023/06/20 05:07:49 checking machine... 2023/06/20 05:07:49 checking revisions... [ 29.110766] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:07:49 testing simple program... [ 29.168508] cgroup: Unknown subsys name 'net' [ 29.243100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:07:47 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=00005560d22f6000 CR3=000000000e76a000 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=2038343a37303a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a37303a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff88801625fe78 RDI=ffff88806cf09aa8 RBP=ffff88801625fe78 RSP=ffff88806cf099f0 R8 =ffffffff863b0c6e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a6be R12=0000000000000008 R13=ffff888016258000 R14=ffff88801625fe80 R15=ffff88806cf09a98 RIP=ffffffff81130468 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 00007f02440d1900 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=00007ffe43bba000 CR3=00000000141d2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000