syzkaller login: [ 61.220247] BUG: Bad rss-counter state mm:00000000ecd85dab type:MM_FILEPAGES val:33 [ 61.221914] BUG: Bad rss-counter state mm:00000000ecd85dab type:MM_ANONPAGES val:22 [ 61.397681] ================================================================== [ 61.398691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.399725] Read of size 8 at addr ffff88800eabd140 by task sshd/219 [ 61.400698] [ 61.400945] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.401887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.402983] Call Trace: [ 61.403328] [ 61.403635] dump_stack_lvl+0x91/0xf0 [ 61.404164] print_report+0xcc/0x620 [ 61.404688] ? __virt_addr_valid+0x102/0x340 [ 61.405292] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.405967] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.406672] kasan_report+0xbe/0xf0 [ 61.407179] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.407853] vma_interval_tree_remove+0xc75/0xec0 [ 61.408504] vma_prepare+0xc54/0x11a0 [ 61.409017] __split_vma+0x5af/0x950 [ 61.409519] ? __pfx___split_vma+0x10/0x10 [ 61.410089] ? find_held_lock+0x2c/0x110 [ 61.410663] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.411272] ? lock_is_held_type+0x9f/0x120 [ 61.411859] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.412513] ? mtree_range_walk+0x632/0x900 [ 61.413110] ? mas_walk+0x5c7/0x7c0 [ 61.413618] do_vmi_munmap+0x1f1/0x2b0 [ 61.414142] mmap_region+0x1f9/0x2660 [ 61.414678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.415242] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.416067] ? __pfx_lock_acquire+0x10/0x10 [ 61.416662] ? __pfx_mmap_region+0x10/0x10 [ 61.417258] ? security_mmap_addr+0x7d/0xa0 [ 61.417837] ? get_unmapped_area+0x1f5/0x3f0 [ 61.418458] do_mmap+0x854/0xf00 [ 61.418958] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.419503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.420126] ksys_mmap_pgoff+0x3af/0x500 [ 61.420680] do_syscall_64+0x3f/0x90 [ 61.421201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.421919] RIP: 0033:0x7f38f1256d82 [ 61.422428] 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 [ 61.424801] RSP: 002b:00007ffc32b8e1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.425796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38f1256d82 [ 61.426735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38f0690000 [ 61.427668] RBP: 00007f38f0690000 R08: 0000000000000009 R09: 0000000000001000 [ 61.428600] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622b5a45ec0 [ 61.429554] R13: 00007ffc32b8e1c0 R14: 00007ffc32b8e1f0 R15: 00007ffc32b8e550 [ 61.430516] [ 61.430844] [ 61.431076] Allocated by task 212: [ 61.431538] kasan_save_stack+0x22/0x50 [ 61.432065] kasan_set_track+0x25/0x30 [ 61.432582] __kasan_slab_alloc+0x59/0x70 [ 61.433131] kmem_cache_alloc+0x16b/0x370 [ 61.433677] vm_area_dup+0x20/0x160 [ 61.434158] __split_vma+0x170/0x950 [ 61.434655] split_vma+0xc6/0x110 [ 61.435122] mprotect_fixup+0x8d2/0xb30 [ 61.435652] do_mprotect_pkey+0x87e/0xd40 [ 61.436200] __x64_sys_mprotect+0x78/0xc0 [ 61.436757] do_syscall_64+0x3f/0x90 [ 61.437264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.437946] [ 61.438175] Freed by task 212: [ 61.438605] kasan_save_stack+0x22/0x50 [ 61.439152] kasan_set_track+0x25/0x30 [ 61.439690] kasan_save_free_info+0x2b/0x50 [ 61.440272] __kasan_slab_free+0x10a/0x190 [ 61.440852] kmem_cache_free+0x10d/0x4d0 [ 61.441408] rcu_core+0x8c8/0x2860 [ 61.441898] __do_softirq+0x1b7/0x7d4 [ 61.442418] [ 61.442664] Last potentially related work creation: [ 61.443302] kasan_save_stack+0x22/0x50 [ 61.443849] __kasan_record_aux_stack+0x8e/0xa0 [ 61.444476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.445179] remove_vma+0x139/0x170 [ 61.445669] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.446271] do_vmi_munmap+0x1f1/0x2b0 [ 61.446804] __vm_munmap+0x138/0x3a0 [ 61.447318] __x64_sys_munmap+0x59/0x80 [ 61.447857] do_syscall_64+0x3f/0x90 [ 61.448373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.449071] [ 61.449301] The buggy address belongs to the object at ffff88800eabd0e8 [ 61.449301] which belongs to the cache vm_area_struct of size 168 [ 61.450909] The buggy address is located 88 bytes inside of [ 61.450909] freed 168-byte region [ffff88800eabd0e8, ffff88800eabd190) [ 61.452429] [ 61.452659] The buggy address belongs to the physical page: [ 61.453378] page:000000004f7d7f5b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeabd [ 61.454563] memcg:ffff888009761101 [ 61.455025] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.455727] page_type: 0xffffffff() [ 61.456213] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 61.457209] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009761101 [ 61.458190] page dumped because: kasan: bad access detected [ 61.458928] [ 61.459160] Memory state around the buggy address: [ 61.459785] ffff88800eabd000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.460707] ffff88800eabd080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 61.461624] >ffff88800eabd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.462553] ^ [ 61.463246] ffff88800eabd180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 61.464177] ffff88800eabd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 61.465094] ================================================================== [ 61.466411] Disabling lock debugging due to kernel taint [ 63.445301] BUG: Bad rss-counter state mm:000000002e2b01f8 type:MM_FILEPAGES val:33 [ 63.446285] BUG: Bad rss-counter state mm:000000002e2b01f8 type:MM_ANONPAGES val:22 [ 63.934511] BUG: Bad rss-counter state mm:000000007723c5ac type:MM_FILEPAGES val:33 [ 63.935579] BUG: Bad rss-counter state mm:000000007723c5ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51303' (ECDSA) to the list of known hosts. 2023/06/21 05:51:20 fuzzer started 2023/06/21 05:51:20 dialing manager at localhost:36067 2023/06/21 05:51:20 checking machine... 2023/06/21 05:51:20 checking revisions... [ 64.646791] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:51:20 testing simple program... [ 64.697587] cgroup: Unknown subsys name 'net' [ 64.737815] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:51:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86141901 RDX=1ffff11002844f60 RSI=ffffffff8450cc7f RDI=ffff888014227aa0 RBP=ffff888014227af8 RSP=ffff888014227a30 R8 =ffffffff8614195c R9 =ffff888014227ae0 R10=0000000000038001 R11=00000000000224af R12=ffff888014227b00 R13=ffff888014227ae8 R14=ffff88800f6d1b40 R15=ffff888014227aa0 RIP=ffffffff81130682 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 00007f55e64f1900 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=00007f55e6aa90b0 CR3=000000000f376000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 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=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=00007f2b85855bb0 CR3=0000000009d4a000 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=54423ab4e0a72c882e4c8042d2e91f26 XMM02=000000000011c500eff9b2d0a8fce9cb XMM03=000000000011c5d02c67c8bc2e329bc3 XMM04=7982e099fd242b5c00000000000ae988 XMM05=682020fb3a84cf610000000000133058 XMM06=806171799158d96700000000001326f0 XMM07=e042d86d42eb936e0000000000122cb0 XMM08=30f1c19a77ba6208000000000011c5d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000