syzkaller login: [ 28.672799] BUG: Bad rss-counter state mm:0000000005bca515 type:MM_FILEPAGES val:33 [ 28.674096] BUG: Bad rss-counter state mm:0000000005bca515 type:MM_ANONPAGES val:22 [ 28.750041] ================================================================== [ 28.750746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.751491] Read of size 8 at addr ffff88800de47b38 by task sshd/218 [ 28.752089] [ 28.752258] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.752928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.753689] Call Trace: [ 28.753940] [ 28.754161] dump_stack_lvl+0x91/0xf0 [ 28.754557] print_report+0xcc/0x620 [ 28.754942] ? __virt_addr_valid+0x102/0x340 [ 28.755378] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.755981] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.756437] kasan_report+0xbe/0xf0 [ 28.756794] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.757255] vma_interval_tree_remove+0xc75/0xec0 [ 28.757726] vma_prepare+0xc54/0x11a0 [ 28.758082] __split_vma+0x5af/0x950 [ 28.758436] ? __pfx___split_vma+0x10/0x10 [ 28.758834] ? find_held_lock+0x2c/0x110 [ 28.759242] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.759636] ? lock_is_held_type+0x9f/0x120 [ 28.759921] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.760240] ? mtree_range_walk+0x632/0x900 [ 28.760531] ? mas_walk+0x5c7/0x7c0 [ 28.760781] do_vmi_munmap+0x1f1/0x2b0 [ 28.761039] mmap_region+0x1f9/0x2660 [ 28.761295] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.761573] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.761948] ? __pfx_lock_acquire+0x10/0x10 [ 28.762230] ? __pfx_mmap_region+0x10/0x10 [ 28.762508] ? security_mmap_addr+0x7d/0xa0 [ 28.762788] ? get_unmapped_area+0x1f5/0x3f0 [ 28.763077] do_mmap+0x854/0xf00 [ 28.763313] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.763577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.763873] ksys_mmap_pgoff+0x3af/0x500 [ 28.764141] do_syscall_64+0x3f/0x90 [ 28.764395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.764745] RIP: 0033:0x7f7ffb577d82 [ 28.765010] 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 [ 28.766214] RSP: 002b:00007ffebfc0cc08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.766695] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ffb577d82 [ 28.767143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ffa9b1000 [ 28.767598] RBP: 00007f7ffa9b1000 R08: 0000000000000009 R09: 0000000000001000 [ 28.768044] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563295f38ec0 [ 28.768493] R13: 00007ffebfc0cc20 R14: 00007ffebfc0cc50 R15: 00007ffebfc0cfb0 [ 28.768945] [ 28.769102] [ 28.769216] Allocated by task 211: [ 28.769444] kasan_save_stack+0x22/0x50 [ 28.769711] kasan_set_track+0x25/0x30 [ 28.769972] __kasan_slab_alloc+0x59/0x70 [ 28.770250] kmem_cache_alloc+0x16b/0x370 [ 28.770522] vm_area_dup+0x20/0x160 [ 28.770762] __split_vma+0x170/0x950 [ 28.771007] split_vma+0xc6/0x110 [ 28.771250] mprotect_fixup+0x8d2/0xb30 [ 28.771515] do_mprotect_pkey+0x87e/0xd40 [ 28.771796] __x64_sys_mprotect+0x78/0xc0 [ 28.772072] do_syscall_64+0x3f/0x90 [ 28.772325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.772666] [ 28.772782] Freed by task 211: [ 28.772988] kasan_save_stack+0x22/0x50 [ 28.773255] kasan_set_track+0x25/0x30 [ 28.773517] kasan_save_free_info+0x2b/0x50 [ 28.773800] __kasan_slab_free+0x10a/0x190 [ 28.774081] kmem_cache_free+0x10d/0x4d0 [ 28.774350] rcu_core+0x8c8/0x2860 [ 28.774584] __do_softirq+0x1b7/0x7d4 [ 28.774838] [ 28.774954] Last potentially related work creation: [ 28.775283] kasan_save_stack+0x22/0x50 [ 28.775547] __kasan_record_aux_stack+0x8e/0xa0 [ 28.775850] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.776192] remove_vma+0x139/0x170 [ 28.776432] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.776726] do_vmi_munmap+0x1f1/0x2b0 [ 28.776983] __vm_munmap+0x138/0x3a0 [ 28.777230] __x64_sys_munmap+0x59/0x80 [ 28.777492] do_syscall_64+0x3f/0x90 [ 28.777753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.778093] [ 28.778208] The buggy address belongs to the object at ffff88800de47ae0 [ 28.778208] which belongs to the cache vm_area_struct of size 168 [ 28.778983] The buggy address is located 88 bytes inside of [ 28.778983] freed 168-byte region [ffff88800de47ae0, ffff88800de47b88) [ 28.779739] [ 28.779856] The buggy address belongs to the physical page: [ 28.780207] page:000000002f49a5f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde47 [ 28.780788] memcg:ffff88800d36da01 [ 28.781016] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.781357] page_type: 0xffffffff() [ 28.781600] raw: 0100000000000200 ffff8880087a0c80 ffffea0000261cc0 dead000000000002 [ 28.782087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d36da01 [ 28.782564] page dumped because: kasan: bad access detected [ 28.782912] [ 28.783026] Memory state around the buggy address: [ 28.783338] ffff88800de47a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.783798] ffff88800de47a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.784252] >ffff88800de47b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.784712] ^ [ 28.785056] ffff88800de47b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 28.785533] ffff88800de47c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 28.786014] ================================================================== [ 28.786532] Disabling lock debugging due to kernel taint [ 30.581173] BUG: Bad rss-counter state mm:00000000a162c0f0 type:MM_FILEPAGES val:33 [ 30.582024] BUG: Bad rss-counter state mm:00000000a162c0f0 type:MM_ANONPAGES val:22 [ 31.042130] BUG: Bad rss-counter state mm:00000000ce0c78c2 type:MM_FILEPAGES val:33 [ 31.043576] BUG: Bad rss-counter state mm:00000000ce0c78c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62003' (ECDSA) to the list of known hosts. 2023/06/21 01:19:35 fuzzer started 2023/06/21 01:19:35 dialing manager at localhost:36067 2023/06/21 01:19:35 checking machine... 2023/06/21 01:19:35 checking revisions... [ 31.862156] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:19:36 testing simple program... [ 31.921777] cgroup: Unknown subsys name 'net' [ 31.979490] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:19:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fd4d1ac05f0 CR3=000000000e8e8000 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=2035333a39313a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a39313a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffea000061aa40 RCX=ffffffff8176428f RDX=fffff940000c3549 RSI=0000000000000008 RDI=ffffea000061aa40 RBP=ffffea000061aa40 RSP=ffff88801977fbc8 R8 =0000000000000001 R9 =fffff940000c3548 R10=ffffea000061aa47 R11=0000000000000000 R12=ffff88800ca543a0 R13=0000000000000001 R14=ffff88800e53aaa1 R15=ffffea000061aa40 RIP=ffffffff81764294 RFL=00000206 [-----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 00007f9649ecc900 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=00007f964a480ae8 CR3=0000000016f04000 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=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