syzkaller login: [ 30.620270] BUG: Bad rss-counter state mm:000000009c103fdd type:MM_FILEPAGES val:33 [ 30.621285] BUG: Bad rss-counter state mm:000000009c103fdd type:MM_ANONPAGES val:22 [ 30.805712] ================================================================== [ 30.807155] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.808304] Read of size 8 at addr ffff88800fd64df0 by task sshd/220 [ 30.809259] [ 30.809529] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.810592] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.811744] Call Trace: [ 30.812070] [ 30.812375] dump_stack_lvl+0x91/0xf0 [ 30.812897] print_report+0xcc/0x620 [ 30.813395] ? __virt_addr_valid+0x102/0x340 [ 30.813954] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.814615] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.815240] kasan_report+0xbe/0xf0 [ 30.815737] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.816402] vma_interval_tree_remove+0xc75/0xec0 [ 30.817026] vma_prepare+0xc54/0x11a0 [ 30.817527] __split_vma+0x5af/0x950 [ 30.818002] ? __pfx___split_vma+0x10/0x10 [ 30.818562] ? find_held_lock+0x2c/0x110 [ 30.819083] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.819683] ? lock_is_held_type+0x9f/0x120 [ 30.820236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.820876] ? mtree_range_walk+0x632/0x900 [ 30.821458] ? mas_walk+0x5c7/0x7c0 [ 30.821943] do_vmi_munmap+0x1f1/0x2b0 [ 30.822465] mmap_region+0x1f9/0x2660 [ 30.822960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.823513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.824236] ? __pfx_lock_acquire+0x10/0x10 [ 30.824789] ? __pfx_mmap_region+0x10/0x10 [ 30.825333] ? security_mmap_addr+0x7d/0xa0 [ 30.825874] ? get_unmapped_area+0x1f5/0x3f0 [ 30.826470] do_mmap+0x854/0xf00 [ 30.826914] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.827452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.828020] ksys_mmap_pgoff+0x3af/0x500 [ 30.828543] do_syscall_64+0x3f/0x90 [ 30.829037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.829708] RIP: 0033:0x7f08b6476d82 [ 30.830175] 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 [ 30.832428] RSP: 002b:00007ffdb6917cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.833402] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08b6476d82 [ 30.834325] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08b58b0000 [ 30.835210] RBP: 00007f08b58b0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.836090] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c9469ef60 [ 30.836967] R13: 00007ffdb6917d10 R14: 00007ffdb6917d40 R15: 00007ffdb69180a0 [ 30.837872] [ 30.838175] [ 30.838418] Allocated by task 213: [ 30.838854] kasan_save_stack+0x22/0x50 [ 30.839383] kasan_set_track+0x25/0x30 [ 30.839878] __kasan_slab_alloc+0x59/0x70 [ 30.840444] kmem_cache_alloc+0x16b/0x370 [ 30.840977] vm_area_dup+0x20/0x160 [ 30.841459] __split_vma+0x170/0x950 [ 30.841933] split_vma+0xc6/0x110 [ 30.842395] mprotect_fixup+0x8d2/0xb30 [ 30.842913] do_mprotect_pkey+0x87e/0xd40 [ 30.843465] __x64_sys_mprotect+0x78/0xc0 [ 30.843987] do_syscall_64+0x3f/0x90 [ 30.844495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.845148] [ 30.845390] Freed by task 213: [ 30.845803] kasan_save_stack+0x22/0x50 [ 30.846318] kasan_set_track+0x25/0x30 [ 30.846848] kasan_save_free_info+0x2b/0x50 [ 30.847540] __kasan_slab_free+0x10a/0x190 [ 30.848086] kmem_cache_free+0x10d/0x4d0 [ 30.848621] rcu_core+0x8c8/0x2860 [ 30.849078] __do_softirq+0x1b7/0x7d4 [ 30.849570] [ 30.849789] Last potentially related work creation: [ 30.850415] kasan_save_stack+0x22/0x50 [ 30.850920] __kasan_record_aux_stack+0x8e/0xa0 [ 30.851507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.852167] remove_vma+0x139/0x170 [ 30.852648] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.853212] do_vmi_munmap+0x1f1/0x2b0 [ 30.853720] __vm_munmap+0x138/0x3a0 [ 30.854201] __x64_sys_munmap+0x59/0x80 [ 30.854750] do_syscall_64+0x3f/0x90 [ 30.855225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.855879] [ 30.856095] The buggy address belongs to the object at ffff88800fd64d98 [ 30.856095] which belongs to the cache vm_area_struct of size 168 [ 30.857622] The buggy address is located 88 bytes inside of [ 30.857622] freed 168-byte region [ffff88800fd64d98, ffff88800fd64e40) [ 30.859071] [ 30.859290] The buggy address belongs to the physical page: [ 30.859975] page:000000004cb3657a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd64 [ 30.861112] memcg:ffff88800d6a6001 [ 30.861575] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.862230] page_type: 0xffffffff() [ 30.862706] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.863669] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6a6001 [ 30.864608] page dumped because: kasan: bad access detected [ 30.865281] [ 30.865516] Memory state around the buggy address: [ 30.866104] ffff88800fd64c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.867014] ffff88800fd64d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.867915] >ffff88800fd64d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.868889] ^ [ 30.869813] ffff88800fd64e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.870710] ffff88800fd64e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.871586] ================================================================== [ 30.872531] Disabling lock debugging due to kernel taint [ 32.726756] BUG: Bad rss-counter state mm:0000000097f20782 type:MM_FILEPAGES val:33 [ 32.727919] BUG: Bad rss-counter state mm:0000000097f20782 type:MM_ANONPAGES val:22 [ 33.207303] BUG: Bad rss-counter state mm:000000004985253a type:MM_FILEPAGES val:33 [ 33.208496] BUG: Bad rss-counter state mm:000000004985253a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15626' (ECDSA) to the list of known hosts. 2023/06/21 05:46:18 fuzzer started 2023/06/21 05:46:18 dialing manager at localhost:36067 2023/06/21 05:46:18 checking machine... 2023/06/21 05:46:18 checking revisions... [ 33.877088] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:46:18 testing simple program... [ 33.926797] cgroup: Unknown subsys name 'net' [ 33.964943] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:46:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88801668f880 RSP=ffff88801668f7c0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff88806ce42a70 R13=ffff88800c65f280 R14=ffffea00003197c0 R15=ffff88806ce42a50 RIP=ffffffff81807481 RFL=00000006 [-----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 00007f5b8f74d900 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=00007f5b8fd02650 CR3=000000000eb96000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fd4f2f28200 CR3=000000000c818000 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=51b2c33455f378b9fc4bdc4dd759587a XMM02=000000000011dbe8eff9b2d0a8fce9cb XMM03=000000000011dcb82c67c8bc2e329bc3 XMM04=118d20db457f2f5d00000000000ae988 XMM05=c9c8e573c26b87580000000000132f50 XMM06=4fda316b135da52b0000000000131ff0 XMM07=e042d86d42eb936e00000000001225a0 XMM08=0e5d132d0e293952000000000011dcb8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000