syzkaller login: [ 61.734957] sshd (214) used greatest stack depth: 24128 bytes left [ 61.737133] BUG: Bad rss-counter state mm:0000000037e3b3fe type:MM_FILEPAGES val:33 [ 61.738227] BUG: Bad rss-counter state mm:0000000037e3b3fe type:MM_ANONPAGES val:22 [ 61.914242] ================================================================== [ 61.915799] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.916952] Read of size 8 at addr ffff88800ef71a50 by task sshd/221 [ 61.917877] [ 61.918132] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.919159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.920325] Call Trace: [ 61.920701] [ 61.921035] dump_stack_lvl+0x91/0xf0 [ 61.921670] print_report+0xcc/0x620 [ 61.922304] ? __virt_addr_valid+0x102/0x340 [ 61.923026] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.923828] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.924619] kasan_report+0xbe/0xf0 [ 61.925220] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.926023] vma_interval_tree_remove+0xc75/0xec0 [ 61.926772] vma_prepare+0xc54/0x11a0 [ 61.927345] __split_vma+0x5af/0x950 [ 61.927958] ? __pfx___split_vma+0x10/0x10 [ 61.928636] ? find_held_lock+0x2c/0x110 [ 61.929310] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.930046] ? lock_is_held_type+0x9f/0x120 [ 61.930754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.931560] ? mtree_range_walk+0x632/0x900 [ 61.932269] ? mas_walk+0x5c7/0x7c0 [ 61.932874] do_vmi_munmap+0x1f1/0x2b0 [ 61.933522] mmap_region+0x1f9/0x2660 [ 61.934139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.934835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.935758] ? __pfx_lock_acquire+0x10/0x10 [ 61.936447] ? __pfx_mmap_region+0x10/0x10 [ 61.937130] ? security_mmap_addr+0x7d/0xa0 [ 61.937820] ? get_unmapped_area+0x1f5/0x3f0 [ 61.938519] do_mmap+0x854/0xf00 [ 61.939112] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.939737] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.940445] ksys_mmap_pgoff+0x3af/0x500 [ 61.941115] do_syscall_64+0x3f/0x90 [ 61.941735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.942562] RIP: 0033:0x7f2f727ffd82 [ 61.943159] 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 [ 61.945909] RSP: 002b:00007ffeb72365b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.947085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f727ffd82 [ 61.948148] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f71c39000 [ 61.949233] RBP: 00007f2f71c39000 R08: 0000000000000009 R09: 0000000000001000 [ 61.950301] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562efc997b20 [ 61.951418] R13: 00007ffeb72365d0 R14: 00007ffeb7236600 R15: 00007ffeb7236960 [ 61.952504] [ 61.952885] [ 61.953144] Allocated by task 214: [ 61.953687] kasan_save_stack+0x22/0x50 [ 61.954344] kasan_set_track+0x25/0x30 [ 61.954981] __kasan_slab_alloc+0x59/0x70 [ 61.955630] kmem_cache_alloc+0x16b/0x370 [ 61.956373] vm_area_dup+0x20/0x160 [ 61.956912] __split_vma+0x170/0x950 [ 61.957462] split_vma+0xc6/0x110 [ 61.957977] mprotect_fixup+0x8d2/0xb30 [ 61.958573] do_mprotect_pkey+0x87e/0xd40 [ 61.959216] __x64_sys_mprotect+0x78/0xc0 [ 61.959828] do_syscall_64+0x3f/0x90 [ 61.960392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.961149] [ 61.961405] Freed by task 214: [ 61.961896] kasan_save_stack+0x22/0x50 [ 61.962489] kasan_set_track+0x25/0x30 [ 61.963114] kasan_save_free_info+0x2b/0x50 [ 61.963751] __kasan_slab_free+0x10a/0x190 [ 61.964385] kmem_cache_free+0x10d/0x4d0 [ 61.964980] rcu_core+0x8c8/0x2860 [ 61.965505] __do_softirq+0x1b7/0x7d4 [ 61.966086] [ 61.966335] Last potentially related work creation: [ 61.967058] kasan_save_stack+0x22/0x50 [ 61.967640] __kasan_record_aux_stack+0x8e/0xa0 [ 61.968316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.969117] remove_vma+0x139/0x170 [ 61.969644] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.970297] do_vmi_munmap+0x1f1/0x2b0 [ 61.970904] __vm_munmap+0x138/0x3a0 [ 61.971459] __x64_sys_munmap+0x59/0x80 [ 61.972044] do_syscall_64+0x3f/0x90 [ 61.972593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.973351] [ 61.973603] The buggy address belongs to the object at ffff88800ef719f8 [ 61.973603] which belongs to the cache vm_area_struct of size 168 [ 61.975357] The buggy address is located 88 bytes inside of [ 61.975357] freed 168-byte region [ffff88800ef719f8, ffff88800ef71aa0) [ 61.977069] [ 61.977326] The buggy address belongs to the physical page: [ 61.978099] page:00000000ef4da1b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef71 [ 61.979413] memcg:ffff88801818e701 [ 61.979908] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.980664] page_type: 0xffffffff() [ 61.981192] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.982266] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801818e701 [ 61.983369] page dumped because: kasan: bad access detected [ 61.984163] [ 61.984441] Memory state around the buggy address: [ 61.985142] ffff88800ef71900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.986153] ffff88800ef71980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 61.987208] >ffff88800ef71a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.988217] ^ [ 61.989040] ffff88800ef71a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 61.990055] ffff88800ef71b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.991099] ================================================================== [ 61.992355] Disabling lock debugging due to kernel taint [ 64.000686] BUG: Bad rss-counter state mm:00000000688ad685 type:MM_FILEPAGES val:33 [ 64.001895] BUG: Bad rss-counter state mm:00000000688ad685 type:MM_ANONPAGES val:22 [ 64.429924] BUG: Bad rss-counter state mm:000000003072b30b type:MM_FILEPAGES val:33 [ 64.431352] BUG: Bad rss-counter state mm:000000003072b30b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22927' (ECDSA) to the list of known hosts. 2023/06/21 07:48:22 fuzzer started 2023/06/21 07:48:22 dialing manager at localhost:36067 2023/06/21 07:48:22 checking machine... 2023/06/21 07:48:22 checking revisions... [ 65.168298] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:48:22 testing simple program... [ 65.227502] cgroup: Unknown subsys name 'net' [ 65.295045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:48:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b38 RCX=ffff88806ce09b10 RDX=0000000000000000 RSI=ffffffff813ad720 RDI=ffff88806ce09b44 RBP=0000000000000000 RSP=ffff88806ce09a50 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff888016fb0000 R15=ffff88801a363508 RIP=ffffffff813ad564 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 00007fbeb884d900 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=00007fff4f5d7000 CR3=000000000e804000 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=6720646572637465733a4d41503d706f 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=00007ffa41dfcf28 CR3=000000000c636000 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=2031323a38343a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a38343a3730203132 XMM08=747379733a755f6d65747379733d6a62 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000