syzkaller login: [ 30.810878] BUG: Bad rss-counter state mm:00000000b3f68655 type:MM_FILEPAGES val:33 [ 30.812323] BUG: Bad rss-counter state mm:00000000b3f68655 type:MM_ANONPAGES val:22 [ 30.848845] ================================================================== [ 30.849494] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.850169] Read of size 8 at addr ffff88801a9b45c8 by task sshd/219 [ 30.850715] [ 30.850870] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.851481] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.852166] Call Trace: [ 30.852391] [ 30.852595] dump_stack_lvl+0x91/0xf0 [ 30.853015] print_report+0xcc/0x620 [ 30.853366] ? __virt_addr_valid+0x102/0x340 [ 30.853727] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854086] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854444] kasan_report+0xbe/0xf0 [ 30.854731] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855097] vma_interval_tree_remove+0xc75/0xec0 [ 30.855448] vma_prepare+0xc54/0x11a0 [ 30.855732] __split_vma+0x5af/0x950 [ 30.856012] ? __pfx___split_vma+0x10/0x10 [ 30.856323] ? find_held_lock+0x2c/0x110 [ 30.856632] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.856962] ? lock_is_held_type+0x9f/0x120 [ 30.857284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.857640] ? mtree_range_walk+0x632/0x900 [ 30.857970] ? mas_walk+0x5c7/0x7c0 [ 30.858251] do_vmi_munmap+0x1f1/0x2b0 [ 30.858544] mmap_region+0x1f9/0x2660 [ 30.858833] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.859131] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.859547] ? __pfx_lock_acquire+0x10/0x10 [ 30.859856] ? __pfx_mmap_region+0x10/0x10 [ 30.860163] ? security_mmap_addr+0x7d/0xa0 [ 30.860474] ? get_unmapped_area+0x1f5/0x3f0 [ 30.860798] do_mmap+0x854/0xf00 [ 30.861053] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.861342] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.861673] ksys_mmap_pgoff+0x3af/0x500 [ 30.861964] do_syscall_64+0x3f/0x90 [ 30.862243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862633] RIP: 0033:0x7f019b287d82 [ 30.862897] 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 [ 30.864113] RSP: 002b:00007ffcecfa7878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.864632] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f019b287d82 [ 30.865120] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f019a6c1000 [ 30.865605] RBP: 00007f019a6c1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.866093] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b43f62980 [ 30.866588] R13: 00007ffcecfa7890 R14: 00007ffcecfa78c0 R15: 00007ffcecfa7c20 [ 30.867084] [ 30.867253] [ 30.867378] Allocated by task 212: [ 30.867626] kasan_save_stack+0x22/0x50 [ 30.867917] kasan_set_track+0x25/0x30 [ 30.868204] __kasan_slab_alloc+0x59/0x70 [ 30.868510] kmem_cache_alloc+0x16b/0x370 [ 30.868806] vm_area_dup+0x20/0x160 [ 30.869070] __split_vma+0x170/0x950 [ 30.869337] split_vma+0xc6/0x110 [ 30.869591] mprotect_fixup+0x8d2/0xb30 [ 30.869883] do_mprotect_pkey+0x87e/0xd40 [ 30.870184] __x64_sys_mprotect+0x78/0xc0 [ 30.870489] do_syscall_64+0x3f/0x90 [ 30.870779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.871151] [ 30.871276] Freed by task 212: [ 30.871503] kasan_save_stack+0x22/0x50 [ 30.871797] kasan_set_track+0x25/0x30 [ 30.872084] kasan_save_free_info+0x2b/0x50 [ 30.872391] __kasan_slab_free+0x10a/0x190 [ 30.872698] kmem_cache_free+0x10d/0x4d0 [ 30.872993] rcu_core+0x8c8/0x2860 [ 30.873248] __do_softirq+0x1b7/0x7d4 [ 30.873526] [ 30.873656] Last potentially related work creation: [ 30.873994] kasan_save_stack+0x22/0x50 [ 30.874284] __kasan_record_aux_stack+0x8e/0xa0 [ 30.874621] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.874999] remove_vma+0x139/0x170 [ 30.875257] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.875579] do_vmi_munmap+0x1f1/0x2b0 [ 30.875859] __vm_munmap+0x138/0x3a0 [ 30.876132] __x64_sys_munmap+0x59/0x80 [ 30.876418] do_syscall_64+0x3f/0x90 [ 30.876696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877067] [ 30.877194] The buggy address belongs to the object at ffff88801a9b4570 [ 30.877194] which belongs to the cache vm_area_struct of size 168 [ 30.878039] The buggy address is located 88 bytes inside of [ 30.878039] freed 168-byte region [ffff88801a9b4570, ffff88801a9b4618) [ 30.878862] [ 30.878987] The buggy address belongs to the physical page: [ 30.879363] page:00000000c96892b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a9b4 [ 30.879990] memcg:ffff888019155801 [ 30.880239] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.880613] page_type: 0xffffffff() [ 30.880872] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.881401] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019155801 [ 30.881920] page dumped because: kasan: bad access detected [ 30.882296] [ 30.882421] Memory state around the buggy address: [ 30.882779] ffff88801a9b4480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.883268] ffff88801a9b4500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.883759] >ffff88801a9b4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.884248] ^ [ 30.884630] ffff88801a9b4600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.885121] ffff88801a9b4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.885611] ================================================================== [ 30.886161] Disabling lock debugging due to kernel taint [ 32.284450] BUG: Bad rss-counter state mm:0000000039854a22 type:MM_FILEPAGES val:33 [ 32.285024] BUG: Bad rss-counter state mm:0000000039854a22 type:MM_ANONPAGES val:22 [ 32.677976] BUG: Bad rss-counter state mm:00000000cf123574 type:MM_FILEPAGES val:33 [ 32.679156] BUG: Bad rss-counter state mm:00000000cf123574 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55651' (ECDSA) to the list of known hosts. 2023/06/21 00:17:46 fuzzer started 2023/06/21 00:17:46 dialing manager at localhost:36067 2023/06/21 00:17:46 checking machine... 2023/06/21 00:17:46 checking revisions... [ 33.265471] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:17:46 testing simple program... [ 33.320117] cgroup: Unknown subsys name 'net' [ 33.366680] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:17:46 Registers: info registers vcpu 0 RAX=ffffffff84d654a0 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffffff0ba7ef0 RSI=ffffffff83639ac2 RDI=ffff888018b90004 RBP=0000000000000010 RSP=ffff88800fc2fe20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000003 R13=0000000000000009 R14=ffff888018b90000 R15=0000000000000010 RIP=ffffffff83639b27 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 00007f51b25a3900 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=00007f51b2b5b0b0 CR3=000000000c542000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007ffc5d0536c8 CR3=000000000d646000 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=37313a3030203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303130 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000