syzkaller login: [ 31.047445] BUG: Bad rss-counter state mm:00000000500696e8 type:MM_FILEPAGES val:33 [ 31.048354] BUG: Bad rss-counter state mm:00000000500696e8 type:MM_ANONPAGES val:22 [ 31.207219] ================================================================== [ 31.208115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.208992] Read of size 8 at addr ffff888019ec9c20 by task sshd/219 [ 31.209715] [ 31.209922] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.210819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.211787] Call Trace: [ 31.212088] [ 31.212360] dump_stack_lvl+0x91/0xf0 [ 31.212827] print_report+0xcc/0x620 [ 31.213483] ? __virt_addr_valid+0x102/0x340 [ 31.214293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.215196] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.216109] kasan_report+0xbe/0xf0 [ 31.216699] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217452] vma_interval_tree_remove+0xc75/0xec0 [ 31.218179] vma_prepare+0xc54/0x11a0 [ 31.218761] __split_vma+0x5af/0x950 [ 31.219327] ? __pfx___split_vma+0x10/0x10 [ 31.219993] ? find_held_lock+0x2c/0x110 [ 31.220616] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.221295] ? lock_is_held_type+0x9f/0x120 [ 31.221946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.222676] ? mtree_range_walk+0x632/0x900 [ 31.223351] ? mas_walk+0x5c7/0x7c0 [ 31.223938] do_vmi_munmap+0x1f1/0x2b0 [ 31.224524] mmap_region+0x1f9/0x2660 [ 31.225106] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.225718] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.226590] ? __pfx_lock_acquire+0x10/0x10 [ 31.227233] ? __pfx_mmap_region+0x10/0x10 [ 31.227888] ? security_mmap_addr+0x7d/0xa0 [ 31.228541] ? get_unmapped_area+0x1f5/0x3f0 [ 31.229204] do_mmap+0x854/0xf00 [ 31.229738] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.230330] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.230998] ksys_mmap_pgoff+0x3af/0x500 [ 31.231634] do_syscall_64+0x3f/0x90 [ 31.232215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232994] RIP: 0033:0x7f269c723d82 [ 31.233531] 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 [ 31.235525] RSP: 002b:00007ffe55573d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.236372] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f269c723d82 [ 31.237172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f269bb5d000 [ 31.237979] RBP: 00007f269bb5d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.238781] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598cf16cf70 [ 31.239595] R13: 00007ffe55573d90 R14: 00007ffe55573dc0 R15: 00007ffe55574120 [ 31.240396] [ 31.240673] [ 31.240877] Allocated by task 212: [ 31.241281] kasan_save_stack+0x22/0x50 [ 31.241757] kasan_set_track+0x25/0x30 [ 31.242224] __kasan_slab_alloc+0x59/0x70 [ 31.242726] kmem_cache_alloc+0x16b/0x370 [ 31.243213] vm_area_dup+0x20/0x160 [ 31.243660] __split_vma+0x170/0x950 [ 31.244116] split_vma+0xc6/0x110 [ 31.244548] mprotect_fixup+0x8d2/0xb30 [ 31.245044] do_mprotect_pkey+0x87e/0xd40 [ 31.245553] __x64_sys_mprotect+0x78/0xc0 [ 31.246058] do_syscall_64+0x3f/0x90 [ 31.246518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.247148] [ 31.247358] Freed by task 19: [ 31.247740] kasan_save_stack+0x22/0x50 [ 31.248235] kasan_set_track+0x25/0x30 [ 31.248722] kasan_save_free_info+0x2b/0x50 [ 31.249242] __kasan_slab_free+0x10a/0x190 [ 31.249762] kmem_cache_free+0x10d/0x4d0 [ 31.250259] rcu_core+0x8c8/0x2860 [ 31.250684] __do_softirq+0x1b7/0x7d4 [ 31.251153] [ 31.251366] Last potentially related work creation: [ 31.251993] kasan_save_stack+0x22/0x50 [ 31.252481] __kasan_record_aux_stack+0x8e/0xa0 [ 31.253048] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.253668] remove_vma+0x139/0x170 [ 31.254107] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.254638] do_vmi_munmap+0x1f1/0x2b0 [ 31.255116] __vm_munmap+0x138/0x3a0 [ 31.255570] __x64_sys_munmap+0x59/0x80 [ 31.256058] do_syscall_64+0x3f/0x90 [ 31.256521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257144] [ 31.257363] The buggy address belongs to the object at ffff888019ec9bc8 [ 31.257363] which belongs to the cache vm_area_struct of size 168 [ 31.258785] The buggy address is located 88 bytes inside of [ 31.258785] freed 168-byte region [ffff888019ec9bc8, ffff888019ec9c70) [ 31.260170] [ 31.260383] The buggy address belongs to the physical page: [ 31.261033] page:00000000f2cb416c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ec9 [ 31.262095] memcg:ffff88800976d901 [ 31.262501] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.263135] page_type: 0xffffffff() [ 31.263576] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.264475] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800976d901 [ 31.265365] page dumped because: kasan: bad access detected [ 31.266010] [ 31.266218] Memory state around the buggy address: [ 31.266766] ffff888019ec9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.267609] ffff888019ec9b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.268436] >ffff888019ec9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.269269] ^ [ 31.269788] ffff888019ec9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.270613] ffff888019ec9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.271436] ================================================================== [ 31.272563] Disabling lock debugging due to kernel taint [ 33.124755] BUG: Bad rss-counter state mm:0000000041f1ba08 type:MM_FILEPAGES val:33 [ 33.125492] BUG: Bad rss-counter state mm:0000000041f1ba08 type:MM_ANONPAGES val:22 [ 33.606877] BUG: Bad rss-counter state mm:000000000d1e05ea type:MM_FILEPAGES val:33 [ 33.608212] BUG: Bad rss-counter state mm:000000000d1e05ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60619' (ECDSA) to the list of known hosts. 2023/06/20 16:21:03 fuzzer started 2023/06/20 16:21:03 dialing manager at localhost:36067 2023/06/20 16:21:03 checking machine... 2023/06/20 16:21:03 checking revisions... [ 34.338523] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:21:03 testing simple program... [ 34.392330] cgroup: Unknown subsys name 'net' [ 34.444212] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:21:02 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=0000000000000001 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=00007f8a8671c000 CR3=000000000dc2c000 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=2032303a31323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a31323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff861386f3 RBX=0000000000000001 RCX=ffffffff861386ee RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019da6f70 RSP=ffff888019da6ea8 R8 =ffffffff861386f2 R9 =ffff888019da6f58 R10=0000000000038001 R11=0000000000020c51 R12=ffff888019da6f78 R13=ffff888019da6f60 R14=ffff888019da6f59 R15=ffff888019da6f18 RIP=ffffffff81130abf 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 00007feb3c3da900 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=00007feb3c3a4008 CR3=000000000e8b6000 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=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