syzkaller login: [ 38.679747] BUG: Bad rss-counter state mm:000000002b90fe45 type:MM_FILEPAGES val:33 [ 38.680882] BUG: Bad rss-counter state mm:000000002b90fe45 type:MM_ANONPAGES val:22 [ 38.830315] ================================================================== [ 38.831243] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.832195] Read of size 8 at addr ffff8880161dd968 by task sshd/219 [ 38.833042] [ 38.833321] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.834191] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.835165] Call Trace: [ 38.835578] [ 38.835871] dump_stack_lvl+0x91/0xf0 [ 38.836418] print_report+0xcc/0x620 [ 38.836914] ? __virt_addr_valid+0x102/0x340 [ 38.837505] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.838128] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.838775] kasan_report+0xbe/0xf0 [ 38.839262] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.839888] vma_interval_tree_remove+0xc75/0xec0 [ 38.840532] vma_prepare+0xc54/0x11a0 [ 38.841026] __split_vma+0x5af/0x950 [ 38.841501] ? __pfx___split_vma+0x10/0x10 [ 38.842036] ? find_held_lock+0x2c/0x110 [ 38.842558] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.843142] ? lock_is_held_type+0x9f/0x120 [ 38.843691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.844302] ? mtree_range_walk+0x632/0x900 [ 38.844874] ? mas_walk+0x5c7/0x7c0 [ 38.845361] do_vmi_munmap+0x1f1/0x2b0 [ 38.845859] mmap_region+0x1f9/0x2660 [ 38.846347] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.846856] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.847586] ? __pfx_lock_acquire+0x10/0x10 [ 38.848135] ? __pfx_mmap_region+0x10/0x10 [ 38.848681] ? security_mmap_addr+0x7d/0xa0 [ 38.849216] ? get_unmapped_area+0x1f5/0x3f0 [ 38.849767] do_mmap+0x854/0xf00 [ 38.850209] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.850708] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.851280] ksys_mmap_pgoff+0x3af/0x500 [ 38.851797] do_syscall_64+0x3f/0x90 [ 38.852285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.852961] RIP: 0033:0x7faa7548fd82 [ 38.853420] 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 [ 38.855578] RSP: 002b:00007fff189fdc38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.856499] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa7548fd82 [ 38.857358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa748c9000 [ 38.858213] RBP: 00007faa748c9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.859078] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fbd3c69ec0 [ 38.859937] R13: 00007fff189fdc50 R14: 00007fff189fdc80 R15: 00007fff189fdfe0 [ 38.860821] [ 38.861114] [ 38.861334] Allocated by task 212: [ 38.861778] kasan_save_stack+0x22/0x50 [ 38.862284] kasan_set_track+0x25/0x30 [ 38.862774] __kasan_slab_alloc+0x59/0x70 [ 38.863306] kmem_cache_alloc+0x16b/0x370 [ 38.863829] vm_area_dup+0x20/0x160 [ 38.864284] __split_vma+0x170/0x950 [ 38.864781] split_vma+0xc6/0x110 [ 38.865222] mprotect_fixup+0x8d2/0xb30 [ 38.865729] do_mprotect_pkey+0x87e/0xd40 [ 38.866253] __x64_sys_mprotect+0x78/0xc0 [ 38.866772] do_syscall_64+0x3f/0x90 [ 38.867254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.867913] [ 38.868129] Freed by task 212: [ 38.868522] kasan_save_stack+0x22/0x50 [ 38.869027] kasan_set_track+0x25/0x30 [ 38.869515] kasan_save_free_info+0x2b/0x50 [ 38.870058] __kasan_slab_free+0x10a/0x190 [ 38.870592] kmem_cache_free+0x10d/0x4d0 [ 38.871106] rcu_core+0x8c8/0x2860 [ 38.871583] __do_softirq+0x1b7/0x7d4 [ 38.872067] [ 38.872286] Last potentially related work creation: [ 38.872896] kasan_save_stack+0x22/0x50 [ 38.873409] __kasan_record_aux_stack+0x8e/0xa0 [ 38.873989] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.874707] remove_vma+0x139/0x170 [ 38.875164] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.875728] do_vmi_munmap+0x1f1/0x2b0 [ 38.876213] __vm_munmap+0x138/0x3a0 [ 38.876735] __x64_sys_munmap+0x59/0x80 [ 38.877227] do_syscall_64+0x3f/0x90 [ 38.877699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.878342] [ 38.878556] Second to last potentially related work creation: [ 38.879232] kasan_save_stack+0x22/0x50 [ 38.879745] __kasan_record_aux_stack+0x8e/0xa0 [ 38.880318] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.880994] remove_vma+0x139/0x170 [ 38.881444] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.882010] do_vmi_munmap+0x1f1/0x2b0 [ 38.882505] __vm_munmap+0x138/0x3a0 [ 38.882968] __x64_sys_munmap+0x59/0x80 [ 38.883464] do_syscall_64+0x3f/0x90 [ 38.883944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.884596] [ 38.884809] The buggy address belongs to the object at ffff8880161dd910 [ 38.884809] which belongs to the cache vm_area_struct of size 168 [ 38.886285] The buggy address is located 88 bytes inside of [ 38.886285] freed 168-byte region [ffff8880161dd910, ffff8880161dd9b8) [ 38.887684] [ 38.887897] The buggy address belongs to the physical page: [ 38.888566] page:00000000c5bd6e33 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x161dd [ 38.889658] memcg:ffff88800eecdb01 [ 38.890083] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.890725] page_type: 0xffffffff() [ 38.891170] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.892085] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eecdb01 [ 38.893036] page dumped because: kasan: bad access detected [ 38.893704] [ 38.893922] Memory state around the buggy address: [ 38.894511] ffff8880161dd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.895370] ffff8880161dd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.896225] >ffff8880161dd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.897110] ^ [ 38.897899] ffff8880161dd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.898771] ffff8880161dda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.899633] ================================================================== [ 38.900637] Disabling lock debugging due to kernel taint [ 41.119243] BUG: Bad rss-counter state mm:00000000299d77c1 type:MM_FILEPAGES val:33 [ 41.120281] BUG: Bad rss-counter state mm:00000000299d77c1 type:MM_ANONPAGES val:22 [ 41.620277] BUG: Bad rss-counter state mm:00000000055c3e33 type:MM_FILEPAGES val:33 [ 41.621270] BUG: Bad rss-counter state mm:00000000055c3e33 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13005' (ECDSA) to the list of known hosts. 2023/06/21 03:54:36 fuzzer started 2023/06/21 03:54:36 dialing manager at localhost:36067 2023/06/21 03:54:36 checking machine... 2023/06/21 03:54:36 checking revisions... [ 42.306783] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:54:36 testing simple program... [ 42.344588] cgroup: Unknown subsys name 'net' [ 42.376229] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:54:36 Registers: info registers vcpu 0 RAX=1ffff1100d9c1372 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000011 RDI=ffff88806ce09b90 RBP=dffffc0000000000 RSP=ffff88806ce09af8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000011 R13=0000000000000000 R14=ffff88806ce09b88 R15=ffff88800f1d9980 RIP=ffffffff813ad61a 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 00007f2fd099a900 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=00007f2fcfdc8920 CR3=000000000d5e4000 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=00000000000000000000000000000000 XMM01=347f69e1f522d5b6c94e6708f4a0671f XMM02=000000000011a8b0eff9b2d0a8fce9cb XMM03=000000000011a9802c67c8bc2e329bc3 XMM04=3a5a7ee8359e75a200000000000ae988 XMM05=a1f6f66c4aae63730000000000133058 XMM06=4fda316b135da52b0000000000131d38 XMM07=e042d86d42eb936e0000000000121540 XMM08=d2f6c3a9d95fdf8c000000000011a980 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb2584 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff88801ca16ec8 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f639254a900 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=00007f6392514008 CR3=000000000ee42000 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