syzkaller login: [ 71.596175] BUG: Bad rss-counter state mm:000000007b7462ec type:MM_FILEPAGES val:33 [ 71.597288] BUG: Bad rss-counter state mm:000000007b7462ec type:MM_ANONPAGES val:22 [ 71.762322] ================================================================== [ 71.763174] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.764057] Read of size 8 at addr ffff88800d5aac20 by task sshd/219 [ 71.764786] [ 71.765067] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 71.766031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.766939] Call Trace: [ 71.767250] [ 71.767519] dump_stack_lvl+0x91/0xf0 [ 71.767983] print_report+0xcc/0x620 [ 71.768442] ? __virt_addr_valid+0x102/0x340 [ 71.768965] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.769549] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.770134] kasan_report+0xbe/0xf0 [ 71.770591] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.771175] vma_interval_tree_remove+0xc75/0xec0 [ 71.771769] vma_prepare+0xc54/0x11a0 [ 71.772237] __split_vma+0x5af/0x950 [ 71.772698] ? __pfx___split_vma+0x10/0x10 [ 71.773232] ? find_held_lock+0x2c/0x110 [ 71.773772] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.774328] ? lock_is_held_type+0x9f/0x120 [ 71.774879] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.775495] ? mtree_range_walk+0x632/0x900 [ 71.776076] ? mas_walk+0x5c7/0x7c0 [ 71.776570] do_vmi_munmap+0x1f1/0x2b0 [ 71.777088] mmap_region+0x1f9/0x2660 [ 71.777599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.778139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.778900] ? __pfx_lock_acquire+0x10/0x10 [ 71.779469] ? __pfx_mmap_region+0x10/0x10 [ 71.780030] ? security_mmap_addr+0x7d/0xa0 [ 71.780591] ? get_unmapped_area+0x1f5/0x3f0 [ 71.781166] do_mmap+0x854/0xf00 [ 71.781654] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.782190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.782776] ksys_mmap_pgoff+0x3af/0x500 [ 71.783312] do_syscall_64+0x3f/0x90 [ 71.783813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.784496] RIP: 0033:0x7f17a8455d82 [ 71.784976] 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 [ 71.787240] RSP: 002b:00007fff7c8b1088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.788187] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17a8455d82 [ 71.789076] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17a788f000 [ 71.789965] RBP: 00007f17a788f000 R08: 0000000000000009 R09: 0000000000001000 [ 71.790852] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559fad543ec0 [ 71.791740] R13: 00007fff7c8b10a0 R14: 00007fff7c8b10d0 R15: 00007fff7c8b1430 [ 71.792643] [ 71.792951] [ 71.793178] Allocated by task 212: [ 71.793649] kasan_save_stack+0x22/0x50 [ 71.794173] kasan_set_track+0x25/0x30 [ 71.794689] __kasan_slab_alloc+0x59/0x70 [ 71.795247] kmem_cache_alloc+0x16b/0x370 [ 71.795787] vm_area_dup+0x20/0x160 [ 71.796263] __split_vma+0x170/0x950 [ 71.796749] split_vma+0xc6/0x110 [ 71.797207] mprotect_fixup+0x8d2/0xb30 [ 71.797732] do_mprotect_pkey+0x87e/0xd40 [ 71.798275] __x64_sys_mprotect+0x78/0xc0 [ 71.798812] do_syscall_64+0x3f/0x90 [ 71.799302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.799974] [ 71.800200] Freed by task 10: [ 71.800602] kasan_save_stack+0x22/0x50 [ 71.801123] kasan_set_track+0x25/0x30 [ 71.801647] kasan_save_free_info+0x2b/0x50 [ 71.802206] __kasan_slab_free+0x10a/0x190 [ 71.802765] kmem_cache_free+0x10d/0x4d0 [ 71.803291] rcu_core+0x8c8/0x2860 [ 71.803755] __do_softirq+0x1b7/0x7d4 [ 71.804244] [ 71.804464] Last potentially related work creation: [ 71.805083] kasan_save_stack+0x22/0x50 [ 71.805636] __kasan_record_aux_stack+0x8e/0xa0 [ 71.806250] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.806935] remove_vma+0x139/0x170 [ 71.807414] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.808007] do_vmi_munmap+0x1f1/0x2b0 [ 71.808521] __vm_munmap+0x138/0x3a0 [ 71.809019] __x64_sys_munmap+0x59/0x80 [ 71.809563] do_syscall_64+0x3f/0x90 [ 71.810070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.810756] [ 71.810984] The buggy address belongs to the object at ffff88800d5aabc8 [ 71.810984] which belongs to the cache vm_area_struct of size 168 [ 71.812563] The buggy address is located 88 bytes inside of [ 71.812563] freed 168-byte region [ffff88800d5aabc8, ffff88800d5aac70) [ 71.814095] [ 71.814324] The buggy address belongs to the physical page: [ 71.815029] page:0000000044515efa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5aa [ 71.816192] memcg:ffff88800d6f5701 [ 71.816648] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.817348] page_type: 0xffffffff() [ 71.817836] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 71.818818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6f5701 [ 71.819788] page dumped because: kasan: bad access detected [ 71.820493] [ 71.820718] Memory state around the buggy address: [ 71.821341] ffff88800d5aab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.822266] ffff88800d5aab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 71.823183] >ffff88800d5aac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 71.824095] ^ [ 71.824660] ffff88800d5aac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 71.825592] ffff88800d5aad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 71.826501] ================================================================== [ 71.827552] Disabling lock debugging due to kernel taint [ 73.991580] BUG: Bad rss-counter state mm:00000000fed8f85a type:MM_FILEPAGES val:33 [ 73.992758] BUG: Bad rss-counter state mm:00000000fed8f85a type:MM_ANONPAGES val:22 [ 74.414821] BUG: Bad rss-counter state mm:00000000e327b0de type:MM_FILEPAGES val:33 [ 74.415841] BUG: Bad rss-counter state mm:00000000e327b0de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57572' (ECDSA) to the list of known hosts. 2023/06/19 14:17:50 fuzzer started 2023/06/19 14:17:51 dialing manager at localhost:44161 2023/06/19 14:17:51 checking machine... 2023/06/19 14:17:51 checking revisions... [ 75.135764] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:17:51 testing simple program... [ 75.180494] cgroup: Unknown subsys name 'net' [ 75.232040] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:17:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f2674d1a650 CR3=000000000f19e000 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=2030353a37313a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a37313a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f09eecc4020 CR3=000000000c6da000 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=7666dfdd4c99d1b6904c716e90a3906e XMM02=2c67c8bc2e329bc30000000000126800 XMM03=fb795ef6d65770560000000000129670 XMM04=8239329b68c7801300000000000ae988 XMM05=dfcdbad4f1609c370000000000139ad0 XMM06=806171799158d9670000000000139958 XMM07=e042d86d42eb936e00000000001298f0 XMM08=beca950524e6faf60000000000126860 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000