syzkaller login: [ 30.631045] BUG: Bad rss-counter state mm:000000006ba3d8e3 type:MM_FILEPAGES val:33 [ 30.632144] BUG: Bad rss-counter state mm:000000006ba3d8e3 type:MM_ANONPAGES val:22 [ 30.829360] ================================================================== [ 30.830229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.831125] Read of size 8 at addr ffff888019b5f880 by task sshd/222 [ 30.831870] [ 30.832080] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.833011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.833945] Call Trace: [ 30.834252] [ 30.834549] dump_stack_lvl+0x91/0xf0 [ 30.835023] print_report+0xcc/0x620 [ 30.835487] ? __virt_addr_valid+0x102/0x340 [ 30.836031] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836626] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.837217] kasan_report+0xbe/0xf0 [ 30.837674] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.838272] vma_interval_tree_remove+0xc75/0xec0 [ 30.838856] vma_prepare+0xc54/0x11a0 [ 30.839319] __split_vma+0x5af/0x950 [ 30.839775] ? __pfx___split_vma+0x10/0x10 [ 30.840303] ? find_held_lock+0x2c/0x110 [ 30.840811] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.841357] ? lock_is_held_type+0x9f/0x120 [ 30.841881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.842468] ? mtree_range_walk+0x632/0x900 [ 30.843000] ? mas_walk+0x5c7/0x7c0 [ 30.843463] do_vmi_munmap+0x1f1/0x2b0 [ 30.843951] mmap_region+0x1f9/0x2660 [ 30.844413] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.844909] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.845599] ? __pfx_lock_acquire+0x10/0x10 [ 30.846111] ? __pfx_mmap_region+0x10/0x10 [ 30.846629] ? security_mmap_addr+0x7d/0xa0 [ 30.847139] ? get_unmapped_area+0x1f5/0x3f0 [ 30.847675] do_mmap+0x854/0xf00 [ 30.848109] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.848586] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.849130] ksys_mmap_pgoff+0x3af/0x500 [ 30.849625] do_syscall_64+0x3f/0x90 [ 30.850087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.850710] RIP: 0033:0x7fc0b6016d82 [ 30.851149] 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 [ 30.853225] RSP: 002b:00007ffc0eaeecc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.854094] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0b6016d82 [ 30.854910] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0b5450000 [ 30.855740] RBP: 00007fc0b5450000 R08: 0000000000000009 R09: 0000000000001000 [ 30.856579] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b4bf24f70 [ 30.857391] R13: 00007ffc0eaeece0 R14: 00007ffc0eaeed10 R15: 00007ffc0eaef070 [ 30.858213] [ 30.858503] [ 30.858710] Allocated by task 213: [ 30.859125] kasan_save_stack+0x22/0x50 [ 30.859612] kasan_set_track+0x25/0x30 [ 30.860089] __kasan_slab_alloc+0x59/0x70 [ 30.860600] kmem_cache_alloc+0x16b/0x370 [ 30.861099] vm_area_dup+0x20/0x160 [ 30.861536] __split_vma+0x170/0x950 [ 30.861987] split_vma+0xc6/0x110 [ 30.862412] mprotect_fixup+0x8d2/0xb30 [ 30.862895] do_mprotect_pkey+0x87e/0xd40 [ 30.863399] __x64_sys_mprotect+0x78/0xc0 [ 30.863916] do_syscall_64+0x3f/0x90 [ 30.864377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.864999] [ 30.865213] Freed by task 203: [ 30.865594] kasan_save_stack+0x22/0x50 [ 30.866080] kasan_set_track+0x25/0x30 [ 30.866559] kasan_save_free_info+0x2b/0x50 [ 30.867072] __kasan_slab_free+0x10a/0x190 [ 30.867588] kmem_cache_free+0x10d/0x4d0 [ 30.868089] rcu_core+0x8c8/0x2860 [ 30.868515] __do_softirq+0x1b7/0x7d4 [ 30.868982] [ 30.869192] Last potentially related work creation: [ 30.869755] kasan_save_stack+0x22/0x50 [ 30.870241] __kasan_record_aux_stack+0x8e/0xa0 [ 30.870793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.871418] remove_vma+0x139/0x170 [ 30.871872] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.872408] do_vmi_munmap+0x1f1/0x2b0 [ 30.872879] __vm_munmap+0x138/0x3a0 [ 30.873332] __x64_sys_munmap+0x59/0x80 [ 30.873812] do_syscall_64+0x3f/0x90 [ 30.874276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874899] [ 30.875108] The buggy address belongs to the object at ffff888019b5f828 [ 30.875108] which belongs to the cache vm_area_struct of size 168 [ 30.876536] The buggy address is located 88 bytes inside of [ 30.876536] freed 168-byte region [ffff888019b5f828, ffff888019b5f8d0) [ 30.877889] [ 30.878097] The buggy address belongs to the physical page: [ 30.878733] page:00000000811fce2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b5f [ 30.879782] memcg:ffff8880199b7801 [ 30.880199] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.880831] page_type: 0xffffffff() [ 30.881264] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.882146] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199b7801 [ 30.883021] page dumped because: kasan: bad access detected [ 30.883656] [ 30.883880] Memory state around the buggy address: [ 30.884442] ffff888019b5f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.885267] ffff888019b5f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.886090] >ffff888019b5f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.886911] ^ [ 30.887306] ffff888019b5f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.888137] ffff888019b5f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.888974] ================================================================== [ 30.890047] Disabling lock debugging due to kernel taint [ 33.066113] BUG: Bad rss-counter state mm:00000000e3f55ff0 type:MM_FILEPAGES val:33 [ 33.067311] BUG: Bad rss-counter state mm:00000000e3f55ff0 type:MM_ANONPAGES val:22 [ 33.531132] BUG: Bad rss-counter state mm:000000001b9f05a8 type:MM_FILEPAGES val:33 [ 33.532277] BUG: Bad rss-counter state mm:000000001b9f05a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54263' (ECDSA) to the list of known hosts. 2023/06/20 23:05:07 fuzzer started 2023/06/20 23:05:07 dialing manager at localhost:36067 2023/06/20 23:05:07 checking machine... 2023/06/20 23:05:07 checking revisions... [ 34.248196] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:05:08 testing simple program... [ 34.295590] cgroup: Unknown subsys name 'net' [ 34.409058] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:05:07 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=00007fa766b66750 CR3=0000000016a68000 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=2037303a35303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a35303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6b RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888008e37c68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffffffff8560b520 R13=ffffffff813782e4 R14=ffff88806cf35000 R15=ffff888018f2dc70 RIP=ffffffff8180f12f 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 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=00007ffe703ad000 CR3=000000000e04c000 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=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