syzkaller login: [ 30.677706] BUG: Bad rss-counter state mm:000000007dc68199 type:MM_FILEPAGES val:33 [ 30.679001] BUG: Bad rss-counter state mm:000000007dc68199 type:MM_ANONPAGES val:22 [ 30.717552] ================================================================== [ 30.718540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.719482] Read of size 8 at addr ffff888019cde5c8 by task sshd/221 [ 30.720241] [ 30.720488] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.721353] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.722332] Call Trace: [ 30.722656] [ 30.722943] dump_stack_lvl+0x91/0xf0 [ 30.723437] print_report+0xcc/0x620 [ 30.723928] ? __virt_addr_valid+0x102/0x340 [ 30.724502] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725127] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.725758] kasan_report+0xbe/0xf0 [ 30.726244] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726876] vma_interval_tree_remove+0xc75/0xec0 [ 30.727480] vma_prepare+0xc54/0x11a0 [ 30.727965] __split_vma+0x5af/0x950 [ 30.728451] ? __pfx___split_vma+0x10/0x10 [ 30.728992] ? find_held_lock+0x2c/0x110 [ 30.729525] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.730099] ? lock_is_held_type+0x9f/0x120 [ 30.730639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.731249] ? mtree_range_walk+0x632/0x900 [ 30.731807] ? mas_walk+0x5c7/0x7c0 [ 30.732285] do_vmi_munmap+0x1f1/0x2b0 [ 30.732805] mmap_region+0x1f9/0x2660 [ 30.733294] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.733803] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.734513] ? __pfx_lock_acquire+0x10/0x10 [ 30.735044] ? __pfx_mmap_region+0x10/0x10 [ 30.735575] ? security_mmap_addr+0x7d/0xa0 [ 30.736120] ? get_unmapped_area+0x1f5/0x3f0 [ 30.736684] do_mmap+0x854/0xf00 [ 30.737133] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.737628] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.738205] ksys_mmap_pgoff+0x3af/0x500 [ 30.738728] do_syscall_64+0x3f/0x90 [ 30.739214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739864] RIP: 0033:0x7fe2bcb89d82 [ 30.740325] 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 [ 30.742470] RSP: 002b:00007ffdbc67fd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.743387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2bcb89d82 [ 30.744234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2bbfc3000 [ 30.745110] RBP: 00007fe2bbfc3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.746054] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ac41a8ec0 [ 30.746931] R13: 00007ffdbc67fd80 R14: 00007ffdbc67fdb0 R15: 00007ffdbc680110 [ 30.747819] [ 30.748114] [ 30.748327] Allocated by task 214: [ 30.748775] kasan_save_stack+0x22/0x50 [ 30.749289] kasan_set_track+0x25/0x30 [ 30.749790] __kasan_slab_alloc+0x59/0x70 [ 30.750325] kmem_cache_alloc+0x16b/0x370 [ 30.750857] vm_area_dup+0x20/0x160 [ 30.751317] __split_vma+0x170/0x950 [ 30.751803] split_vma+0xc6/0x110 [ 30.752249] mprotect_fixup+0x8d2/0xb30 [ 30.752771] do_mprotect_pkey+0x87e/0xd40 [ 30.753295] __x64_sys_mprotect+0x78/0xc0 [ 30.753822] do_syscall_64+0x3f/0x90 [ 30.754296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754944] [ 30.755158] Freed by task 214: [ 30.755549] kasan_save_stack+0x22/0x50 [ 30.756049] kasan_set_track+0x25/0x30 [ 30.756552] kasan_save_free_info+0x2b/0x50 [ 30.757086] __kasan_slab_free+0x10a/0x190 [ 30.757620] kmem_cache_free+0x10d/0x4d0 [ 30.758129] rcu_core+0x8c8/0x2860 [ 30.758575] __do_softirq+0x1b7/0x7d4 [ 30.759051] [ 30.759267] Last potentially related work creation: [ 30.759849] kasan_save_stack+0x22/0x50 [ 30.760359] __kasan_record_aux_stack+0x8e/0xa0 [ 30.760942] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761598] remove_vma+0x139/0x170 [ 30.762053] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762614] do_vmi_munmap+0x1f1/0x2b0 [ 30.763110] __vm_munmap+0x138/0x3a0 [ 30.763580] __x64_sys_munmap+0x59/0x80 [ 30.764082] do_syscall_64+0x3f/0x90 [ 30.764587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765231] [ 30.765447] The buggy address belongs to the object at ffff888019cde570 [ 30.765447] which belongs to the cache vm_area_struct of size 168 [ 30.766906] The buggy address is located 88 bytes inside of [ 30.766906] freed 168-byte region [ffff888019cde570, ffff888019cde618) [ 30.768309] [ 30.768531] The buggy address belongs to the physical page: [ 30.769190] page:0000000038f3b856 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cde [ 30.770288] memcg:ffff88801a358701 [ 30.770713] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.771356] page_type: 0xffffffff() [ 30.771809] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.772741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a358701 [ 30.773651] page dumped because: kasan: bad access detected [ 30.774330] [ 30.774551] Memory state around the buggy address: [ 30.775139] ffff888019cde480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.776006] ffff888019cde500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.776899] >ffff888019cde580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.777750] ^ [ 30.778417] ffff888019cde600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.779268] ffff888019cde680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.780122] ================================================================== [ 30.781168] Disabling lock debugging due to kernel taint [ 32.815936] BUG: Bad rss-counter state mm:000000000c33c0c8 type:MM_FILEPAGES val:33 [ 32.816943] BUG: Bad rss-counter state mm:000000000c33c0c8 type:MM_ANONPAGES val:22 [ 33.181955] BUG: Bad rss-counter state mm:00000000266a8099 type:MM_FILEPAGES val:33 [ 33.182600] BUG: Bad rss-counter state mm:00000000266a8099 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43276' (ECDSA) to the list of known hosts. 2023/06/21 07:46:18 fuzzer started 2023/06/21 07:46:18 dialing manager at localhost:36067 2023/06/21 07:46:18 checking machine... 2023/06/21 07:46:18 checking revisions... [ 33.839376] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:46:19 testing simple program... [ 33.885731] cgroup: Unknown subsys name 'net' [ 33.940977] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:46:18 Registers: info registers vcpu 0 RAX=ffffed10019ab098 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff88800cd584c0 RDI=ffff88800844f780 RBP=ffffffff813782f8 RSP=ffff888008d9fce0 R8 =0000000000000130 R9 =0000000000000000 R10=ffffed10019ab098 R11=0000000000000128 R12=ffff88800cd584c0 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88800cd58540 RIP=ffffffff8180f590 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 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=00007fffabd78000 CR3=0000000019c28000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=00007ffa49611030 CR3=000000000d924000 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=ef004811927aaf80154aad9b8d0accb9 XMM02=2c67c8bc2e329bc3000000000011a100 XMM03=fb795ef6d65770560000000000121678 XMM04=420b22b28b6240f300000000000ae988 XMM05=e4cb8bb95a7664b60000000000131550 XMM06=c291bd5c70af25b900000000001313d8 XMM07=e042d86d42eb936e00000000001218f8 XMM08=0552d790715a4644000000000011a160 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000