syzkaller login: [ 30.541050] BUG: Bad rss-counter state mm:00000000048de136 type:MM_FILEPAGES val:33 [ 30.542048] BUG: Bad rss-counter state mm:00000000048de136 type:MM_ANONPAGES val:22 [ 30.702335] ================================================================== [ 30.703252] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.704187] Read of size 8 at addr ffff888009524c20 by task sshd/220 [ 30.705126] [ 30.705343] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.706217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.707221] Call Trace: [ 30.707549] [ 30.707831] dump_stack_lvl+0x91/0xf0 [ 30.708318] print_report+0xcc/0x620 [ 30.708803] ? __virt_addr_valid+0x102/0x340 [ 30.709368] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709990] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710609] kasan_report+0xbe/0xf0 [ 30.711090] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.711725] vma_interval_tree_remove+0xc75/0xec0 [ 30.712329] vma_prepare+0xc54/0x11a0 [ 30.712813] __split_vma+0x5af/0x950 [ 30.713285] ? __pfx___split_vma+0x10/0x10 [ 30.713812] ? find_held_lock+0x2c/0x110 [ 30.714341] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.714907] ? lock_is_held_type+0x9f/0x120 [ 30.715469] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.716073] ? mtree_range_walk+0x632/0x900 [ 30.716626] ? mas_walk+0x5c7/0x7c0 [ 30.717102] do_vmi_munmap+0x1f1/0x2b0 [ 30.717591] mmap_region+0x1f9/0x2660 [ 30.718074] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.718583] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.719330] ? __pfx_lock_acquire+0x10/0x10 [ 30.719864] ? __pfx_mmap_region+0x10/0x10 [ 30.720397] ? security_mmap_addr+0x7d/0xa0 [ 30.720919] ? get_unmapped_area+0x1f5/0x3f0 [ 30.721467] do_mmap+0x854/0xf00 [ 30.721906] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.722399] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.722962] ksys_mmap_pgoff+0x3af/0x500 [ 30.723474] do_syscall_64+0x3f/0x90 [ 30.723952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.724607] RIP: 0033:0x7f755fd3cd82 [ 30.725057] 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 [ 30.727256] RSP: 002b:00007ffcd37ddca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.728164] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f755fd3cd82 [ 30.729028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f755f176000 [ 30.729885] RBP: 00007f755f176000 R08: 0000000000000009 R09: 0000000000001000 [ 30.730735] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d0ff24f70 [ 30.731591] R13: 00007ffcd37ddcc0 R14: 00007ffcd37ddcf0 R15: 00007ffcd37de050 [ 30.732448] [ 30.732739] [ 30.732957] Allocated by task 213: [ 30.733385] kasan_save_stack+0x22/0x50 [ 30.733892] kasan_set_track+0x25/0x30 [ 30.734385] __kasan_slab_alloc+0x59/0x70 [ 30.734914] kmem_cache_alloc+0x16b/0x370 [ 30.735454] vm_area_dup+0x20/0x160 [ 30.735915] __split_vma+0x170/0x950 [ 30.736379] split_vma+0xc6/0x110 [ 30.736821] mprotect_fixup+0x8d2/0xb30 [ 30.737322] do_mprotect_pkey+0x87e/0xd40 [ 30.737846] __x64_sys_mprotect+0x78/0xc0 [ 30.738363] do_syscall_64+0x3f/0x90 [ 30.738836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739486] [ 30.739703] Freed by task 213: [ 30.740095] kasan_save_stack+0x22/0x50 [ 30.740595] kasan_set_track+0x25/0x30 [ 30.741089] kasan_save_free_info+0x2b/0x50 [ 30.741623] __kasan_slab_free+0x10a/0x190 [ 30.742156] kmem_cache_free+0x10d/0x4d0 [ 30.742662] rcu_core+0x8c8/0x2860 [ 30.743126] __do_softirq+0x1b7/0x7d4 [ 30.743607] [ 30.743829] Last potentially related work creation: [ 30.744415] kasan_save_stack+0x22/0x50 [ 30.744918] __kasan_record_aux_stack+0x8e/0xa0 [ 30.745494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.746140] remove_vma+0x139/0x170 [ 30.746588] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.747153] do_vmi_munmap+0x1f1/0x2b0 [ 30.747641] __vm_munmap+0x138/0x3a0 [ 30.748111] __x64_sys_munmap+0x59/0x80 [ 30.748605] do_syscall_64+0x3f/0x90 [ 30.749079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.749720] [ 30.749935] The buggy address belongs to the object at ffff888009524bc8 [ 30.749935] which belongs to the cache vm_area_struct of size 168 [ 30.751551] The buggy address is located 88 bytes inside of [ 30.751551] freed 168-byte region [ffff888009524bc8, ffff888009524c70) [ 30.752952] [ 30.753171] The buggy address belongs to the physical page: [ 30.753839] page:00000000490c374d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9524 [ 30.754922] memcg:ffff888013fc5701 [ 30.755358] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.755999] page_type: 0xffffffff() [ 30.756455] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.757368] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fc5701 [ 30.758273] page dumped because: kasan: bad access detected [ 30.758933] [ 30.759157] Memory state around the buggy address: [ 30.759736] ffff888009524b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.760585] ffff888009524b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.761441] >ffff888009524c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.762305] ^ [ 30.762839] ffff888009524c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.763713] ffff888009524d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.764559] ================================================================== [ 30.765476] Disabling lock debugging due to kernel taint [ 33.758338] BUG: Bad rss-counter state mm:00000000cb1bfb86 type:MM_FILEPAGES val:33 [ 33.759523] BUG: Bad rss-counter state mm:00000000cb1bfb86 type:MM_ANONPAGES val:22 [ 34.231185] BUG: Bad rss-counter state mm:00000000548c960c type:MM_FILEPAGES val:33 [ 34.232176] BUG: Bad rss-counter state mm:00000000548c960c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10353' (ECDSA) to the list of known hosts. 2023/06/20 13:25:40 fuzzer started 2023/06/20 13:25:41 dialing manager at localhost:36067 2023/06/20 13:25:41 checking machine... 2023/06/20 13:25:41 checking revisions... [ 34.943857] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:25:41 testing simple program... [ 34.993466] cgroup: Unknown subsys name 'net' [ 35.038874] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:25:40 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000be55b5a7 RCX=ffff88806c6dad38 RDX=000000000000000d RSI=0000000000000002 RDI=00000000000904ff RBP=ffff88800db264d0 RSP=ffff88801691fa00 R8 =0000000019f10796 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88801691fa68 R15=000000000000000d RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007f063654b900 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=00007ffc45df9000 CR3=0000000010320000 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=6720646572637465733a4d41503d706f 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 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=0000000000000001 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=00007f60afc920a0 CR3=000000001024c000 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=2ca05d04511e448c994eba830913bcc2 XMM02=000000000011a740ec2efd57dc4c00df XMM03=0000000000121fb06df97e1d80af6187 XMM04=696845da6a23fe1600000000000ae988 XMM05=e4cb8bb95a7664b60000000000131e10 XMM06=4183ba1d5456937c0000000000130c78 XMM07=e042d86d42eb936e0000000000122230 XMM08=6df97e1d80af6187000000000011a7a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000