syzkaller login: [ 31.524337] BUG: Bad rss-counter state mm:000000004abed393 type:MM_FILEPAGES val:33 [ 31.525342] BUG: Bad rss-counter state mm:000000004abed393 type:MM_ANONPAGES val:22 [ 31.699123] ================================================================== [ 31.700234] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.701176] Read of size 8 at addr ffff88800e58a880 by task sshd/220 [ 31.702072] [ 31.702294] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.703157] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.704156] Call Trace: [ 31.704472] [ 31.704754] dump_stack_lvl+0x91/0xf0 [ 31.705247] print_report+0xcc/0x620 [ 31.705737] ? __virt_addr_valid+0x102/0x340 [ 31.706298] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.706911] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.707523] kasan_report+0xbe/0xf0 [ 31.708023] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.708643] vma_interval_tree_remove+0xc75/0xec0 [ 31.709239] vma_prepare+0xc54/0x11a0 [ 31.709721] __split_vma+0x5af/0x950 [ 31.710199] ? __pfx___split_vma+0x10/0x10 [ 31.710729] ? find_held_lock+0x2c/0x110 [ 31.711242] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.711805] ? lock_is_held_type+0x9f/0x120 [ 31.712351] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.712965] ? mtree_range_walk+0x632/0x900 [ 31.713519] ? mas_walk+0x5c7/0x7c0 [ 31.713993] do_vmi_munmap+0x1f1/0x2b0 [ 31.714486] mmap_region+0x1f9/0x2660 [ 31.714968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.715480] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.716196] ? __pfx_lock_acquire+0x10/0x10 [ 31.716728] ? __pfx_mmap_region+0x10/0x10 [ 31.717256] ? security_mmap_addr+0x7d/0xa0 [ 31.717790] ? get_unmapped_area+0x1f5/0x3f0 [ 31.718340] do_mmap+0x854/0xf00 [ 31.718783] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.719276] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.719836] ksys_mmap_pgoff+0x3af/0x500 [ 31.720371] do_syscall_64+0x3f/0x90 [ 31.720857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.721509] RIP: 0033:0x7f96d4489d82 [ 31.721975] 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 [ 31.724112] RSP: 002b:00007ffdc9a349c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.725027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96d4489d82 [ 31.725885] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96d38c3000 [ 31.726727] RBP: 00007f96d38c3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.727572] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a90d2db20 [ 31.728424] R13: 00007ffdc9a349e0 R14: 00007ffdc9a34a10 R15: 00007ffdc9a34d70 [ 31.729274] [ 31.729567] [ 31.729782] Allocated by task 213: [ 31.730213] kasan_save_stack+0x22/0x50 [ 31.730713] kasan_set_track+0x25/0x30 [ 31.731207] __kasan_slab_alloc+0x59/0x70 [ 31.731735] kmem_cache_alloc+0x16b/0x370 [ 31.732274] vm_area_dup+0x20/0x160 [ 31.732730] __split_vma+0x170/0x950 [ 31.733194] split_vma+0xc6/0x110 [ 31.733631] mprotect_fixup+0x8d2/0xb30 [ 31.734143] do_mprotect_pkey+0x87e/0xd40 [ 31.734665] __x64_sys_mprotect+0x78/0xc0 [ 31.735181] do_syscall_64+0x3f/0x90 [ 31.735653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.736298] [ 31.736518] Freed by task 13: [ 31.736901] kasan_save_stack+0x22/0x50 [ 31.737398] kasan_set_track+0x25/0x30 [ 31.737893] kasan_save_free_info+0x2b/0x50 [ 31.738421] __kasan_slab_free+0x10a/0x190 [ 31.738951] kmem_cache_free+0x10d/0x4d0 [ 31.739456] rcu_core+0x8c8/0x2860 [ 31.739911] __do_softirq+0x1b7/0x7d4 [ 31.740391] [ 31.740612] Last potentially related work creation: [ 31.741201] kasan_save_stack+0x22/0x50 [ 31.741697] __kasan_record_aux_stack+0x8e/0xa0 [ 31.742273] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.742915] remove_vma+0x139/0x170 [ 31.743446] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.744010] do_vmi_munmap+0x1f1/0x2b0 [ 31.744497] __vm_munmap+0x138/0x3a0 [ 31.744964] __x64_sys_munmap+0x59/0x80 [ 31.745461] do_syscall_64+0x3f/0x90 [ 31.745932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.746580] [ 31.746803] Second to last potentially related work creation: [ 31.747491] kasan_save_stack+0x22/0x50 [ 31.747997] __kasan_record_aux_stack+0x8e/0xa0 [ 31.748564] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.749200] remove_vma+0x139/0x170 [ 31.749649] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.750202] do_vmi_munmap+0x1f1/0x2b0 [ 31.750687] mmap_region+0x1f9/0x2660 [ 31.751167] do_mmap+0x854/0xf00 [ 31.751602] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.752107] ksys_mmap_pgoff+0x7d/0x500 [ 31.752610] do_syscall_64+0x3f/0x90 [ 31.753109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.753778] [ 31.753998] The buggy address belongs to the object at ffff88800e58a828 [ 31.753998] which belongs to the cache vm_area_struct of size 168 [ 31.755527] The buggy address is located 88 bytes inside of [ 31.755527] freed 168-byte region [ffff88800e58a828, ffff88800e58a8d0) [ 31.756985] [ 31.757214] The buggy address belongs to the physical page: [ 31.757906] page:00000000b56ca465 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe58a [ 31.759031] memcg:ffff88800977ff01 [ 31.759475] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.760171] page_type: 0xffffffff() [ 31.760637] raw: 0100000000000200 ffff8880087a0c80 ffffea000036ad80 dead000000000008 [ 31.761586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800977ff01 [ 31.762517] page dumped because: kasan: bad access detected [ 31.763202] [ 31.763430] Memory state around the buggy address: [ 31.764037] ffff88800e58a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.764936] ffff88800e58a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.765825] >ffff88800e58a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.766715] ^ [ 31.767141] ffff88800e58a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.768030] ffff88800e58a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.768909] ================================================================== [ 31.769864] Disabling lock debugging due to kernel taint [ 34.081189] BUG: Bad rss-counter state mm:0000000070f2555a type:MM_FILEPAGES val:33 [ 34.082337] BUG: Bad rss-counter state mm:0000000070f2555a type:MM_ANONPAGES val:22 [ 34.435782] BUG: Bad rss-counter state mm:00000000230d0e0f type:MM_FILEPAGES val:33 [ 34.436727] BUG: Bad rss-counter state mm:00000000230d0e0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38891' (ECDSA) to the list of known hosts. 2023/06/21 06:54:00 fuzzer started 2023/06/21 06:54:01 dialing manager at localhost:36067 2023/06/21 06:54:01 checking machine... 2023/06/21 06:54:01 checking revisions... [ 34.996296] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:54:01 testing simple program... [ 35.035522] cgroup: Unknown subsys name 'net' [ 35.074491] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:54:00 Registers: info registers vcpu 0 RAX=ffffffff85d3d350 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11003392d86 RSP=ffff888019c96c10 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff888019c97278 RIP=ffffffff8180f036 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 00007f8c1666f900 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=00007f8c1664e020 CR3=000000001720c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fbdab3fdba0 CR3=000000000e8e2000 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=2030303a34353a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a34353a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000