syzkaller login: [ 35.859758] BUG: Bad rss-counter state mm:0000000024f3dc52 type:MM_FILEPAGES val:33 [ 35.860787] BUG: Bad rss-counter state mm:0000000024f3dc52 type:MM_ANONPAGES val:22 [ 36.022738] ================================================================== [ 36.023648] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.024585] Read of size 8 at addr ffff88800ea61d08 by task sshd/226 [ 36.025370] [ 36.025586] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.026587] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.027572] Call Trace: [ 36.027896] [ 36.028181] dump_stack_lvl+0x91/0xf0 [ 36.028708] print_report+0xcc/0x620 [ 36.029189] ? __virt_addr_valid+0x102/0x340 [ 36.029744] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.030361] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.030975] kasan_report+0xbe/0xf0 [ 36.031455] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.032074] vma_interval_tree_remove+0xc75/0xec0 [ 36.032683] vma_prepare+0xc54/0x11a0 [ 36.033170] __split_vma+0x5af/0x950 [ 36.033642] ? __pfx___split_vma+0x10/0x10 [ 36.034162] ? find_held_lock+0x2c/0x110 [ 36.034681] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.035246] ? lock_is_held_type+0x9f/0x120 [ 36.035778] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.036373] ? mtree_range_walk+0x632/0x900 [ 36.036954] ? mas_walk+0x5c7/0x7c0 [ 36.037424] do_vmi_munmap+0x1f1/0x2b0 [ 36.037917] mmap_region+0x1f9/0x2660 [ 36.038392] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.038902] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.039608] ? __pfx_lock_acquire+0x10/0x10 [ 36.040137] ? __pfx_mmap_region+0x10/0x10 [ 36.040673] ? security_mmap_addr+0x7d/0xa0 [ 36.041201] ? get_unmapped_area+0x1f5/0x3f0 [ 36.041748] do_mmap+0x854/0xf00 [ 36.042180] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.042679] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.043235] ksys_mmap_pgoff+0x3af/0x500 [ 36.043739] do_syscall_64+0x3f/0x90 [ 36.044212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.044877] RIP: 0033:0x7fdac5cc2d82 [ 36.045328] 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 [ 36.047436] RSP: 002b:00007ffc611ac778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.048339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdac5cc2d82 [ 36.049200] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdac50fc000 [ 36.050045] RBP: 00007fdac50fc000 R08: 0000000000000009 R09: 0000000000001000 [ 36.050898] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556bccdd2f70 [ 36.051739] R13: 00007ffc611ac790 R14: 00007ffc611ac7c0 R15: 00007ffc611acb20 [ 36.052608] [ 36.052909] [ 36.053123] Allocated by task 219: [ 36.053550] kasan_save_stack+0x22/0x50 [ 36.054062] kasan_set_track+0x25/0x30 [ 36.054558] __kasan_slab_alloc+0x59/0x70 [ 36.055079] kmem_cache_alloc+0x16b/0x370 [ 36.055599] vm_area_dup+0x20/0x160 [ 36.056056] __split_vma+0x170/0x950 [ 36.056517] split_vma+0xc6/0x110 [ 36.056976] mprotect_fixup+0x8d2/0xb30 [ 36.057469] do_mprotect_pkey+0x87e/0xd40 [ 36.057985] __x64_sys_mprotect+0x78/0xc0 [ 36.058508] do_syscall_64+0x3f/0x90 [ 36.058992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.059634] [ 36.059849] Freed by task 219: [ 36.060244] kasan_save_stack+0x22/0x50 [ 36.060752] kasan_set_track+0x25/0x30 [ 36.061244] kasan_save_free_info+0x2b/0x50 [ 36.061776] __kasan_slab_free+0x10a/0x190 [ 36.062306] kmem_cache_free+0x10d/0x4d0 [ 36.062815] rcu_core+0x8c8/0x2860 [ 36.063257] __do_softirq+0x1b7/0x7d4 [ 36.063729] [ 36.063943] Last potentially related work creation: [ 36.064524] kasan_save_stack+0x22/0x50 [ 36.065030] __kasan_record_aux_stack+0x8e/0xa0 [ 36.065600] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.066237] remove_vma+0x139/0x170 [ 36.066684] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.067317] do_vmi_munmap+0x1f1/0x2b0 [ 36.067802] __vm_munmap+0x138/0x3a0 [ 36.068265] __x64_sys_munmap+0x59/0x80 [ 36.068777] do_syscall_64+0x3f/0x90 [ 36.069252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.069889] [ 36.070102] The buggy address belongs to the object at ffff88800ea61cb0 [ 36.070102] which belongs to the cache vm_area_struct of size 168 [ 36.071558] The buggy address is located 88 bytes inside of [ 36.071558] freed 168-byte region [ffff88800ea61cb0, ffff88800ea61d58) [ 36.072959] [ 36.073174] The buggy address belongs to the physical page: [ 36.073821] page:00000000648acf4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea61 [ 36.074899] memcg:ffff88800fe86501 [ 36.075318] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.075963] page_type: 0xffffffff() [ 36.076407] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 36.077338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe86501 [ 36.078233] page dumped because: kasan: bad access detected [ 36.078887] [ 36.079100] Memory state around the buggy address: [ 36.079680] ffff88800ea61c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.080529] ffff88800ea61c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.081382] >ffff88800ea61d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.082230] ^ [ 36.082668] ffff88800ea61d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.083513] ffff88800ea61e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 36.084358] ================================================================== [ 36.085388] Disabling lock debugging due to kernel taint [ 38.927747] BUG: Bad rss-counter state mm:000000003dc5a0f3 type:MM_FILEPAGES val:33 [ 38.928785] BUG: Bad rss-counter state mm:000000003dc5a0f3 type:MM_ANONPAGES val:22 [ 39.358421] BUG: Bad rss-counter state mm:00000000f63e551c type:MM_FILEPAGES val:33 [ 39.359173] BUG: Bad rss-counter state mm:00000000f63e551c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23984' (ECDSA) to the list of known hosts. 2023/06/20 16:45:44 fuzzer started 2023/06/20 16:45:44 dialing manager at localhost:36067 2023/06/20 16:45:44 checking machine... 2023/06/20 16:45:44 checking revisions... [ 40.004174] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:45:45 testing simple program... [ 40.051724] cgroup: Unknown subsys name 'net' [ 40.103104] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:45:44 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800d9dac80 RCX=0000000000000000 RDX=ffff888019b9b680 RSI=ffffffff818b3a87 RDI=ffff88800ff45740 RBP=ffff88800d9dac80 RSP=ffff8880147bff00 R8 =0000000000000000 R9 =ffffed1001fe8ae8 R10=ffff88800ff45743 R11=0000000000000000 R12=0000000000000000 R13=0000000000000002 R14=0000000000000001 R15=0000000000000008 RIP=ffffffff814c086b RFL=00000282 [--S----] 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 00007fdca8d46900 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=00007ffecd4fd000 CR3=000000000e2be000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c04400 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=00007fb792b791b0 CR3=0000000008cc0000 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=e1df0c598d1b8c84954ab2a05b63f465 XMM02=ec2efd57dc4c00df000000000011bdc0 XMM03=e467614cda08e2f1000000000011be90 XMM04=d3586cf758fd1ad100000000000ae988 XMM05=6860aeb314f8829d0000000000131c50 XMM06=13e856d8d71426c80000000000131ad8 XMM07=e042d86d42eb936e0000000000122330 XMM08=e467614cda08e2f1000000000011be90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000