syzkaller login: [ 30.301975] BUG: Bad rss-counter state mm:00000000304df07d type:MM_FILEPAGES val:33 [ 30.302782] BUG: Bad rss-counter state mm:00000000304df07d type:MM_ANONPAGES val:22 [ 30.464659] ================================================================== [ 30.465522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.466396] Read of size 8 at addr ffff88800f28c5c8 by task sshd/219 [ 30.467126] [ 30.467333] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.468277] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.469192] Call Trace: [ 30.469491] [ 30.469777] dump_stack_lvl+0x91/0xf0 [ 30.470249] print_report+0xcc/0x620 [ 30.470714] ? __virt_addr_valid+0x102/0x340 [ 30.471234] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.471816] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.472400] kasan_report+0xbe/0xf0 [ 30.472847] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.473437] vma_interval_tree_remove+0xc75/0xec0 [ 30.474009] vma_prepare+0xc54/0x11a0 [ 30.474462] __split_vma+0x5af/0x950 [ 30.474929] ? __pfx___split_vma+0x10/0x10 [ 30.475451] ? find_held_lock+0x2c/0x110 [ 30.475965] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.476537] ? lock_is_held_type+0x9f/0x120 [ 30.477070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.477675] ? mtree_range_walk+0x632/0x900 [ 30.478220] ? mas_walk+0x5c7/0x7c0 [ 30.478703] do_vmi_munmap+0x1f1/0x2b0 [ 30.479193] mmap_region+0x1f9/0x2660 [ 30.479667] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.480173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.480881] ? __pfx_lock_acquire+0x10/0x10 [ 30.481407] ? __pfx_mmap_region+0x10/0x10 [ 30.481938] ? security_mmap_addr+0x7d/0xa0 [ 30.482464] ? get_unmapped_area+0x1f5/0x3f0 [ 30.483021] do_mmap+0x854/0xf00 [ 30.483460] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.483946] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.484503] ksys_mmap_pgoff+0x3af/0x500 [ 30.485001] do_syscall_64+0x3f/0x90 [ 30.485480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.486121] RIP: 0033:0x7f0d55413d82 [ 30.486576] 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 [ 30.488648] RSP: 002b:00007ffc2ee56ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.489541] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d55413d82 [ 30.490380] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d5484d000 [ 30.491235] RBP: 00007f0d5484d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.492063] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9da985ec0 [ 30.492907] R13: 00007ffc2ee56ec0 R14: 00007ffc2ee56ef0 R15: 00007ffc2ee57250 [ 30.493757] [ 30.494045] [ 30.494260] Allocated by task 212: [ 30.494688] kasan_save_stack+0x22/0x50 [ 30.495188] kasan_set_track+0x25/0x30 [ 30.495668] __kasan_slab_alloc+0x59/0x70 [ 30.496180] kmem_cache_alloc+0x16b/0x370 [ 30.496690] vm_area_dup+0x20/0x160 [ 30.497137] __split_vma+0x170/0x950 [ 30.497600] split_vma+0xc6/0x110 [ 30.498033] mprotect_fixup+0x8d2/0xb30 [ 30.498540] do_mprotect_pkey+0x87e/0xd40 [ 30.499060] __x64_sys_mprotect+0x78/0xc0 [ 30.499571] do_syscall_64+0x3f/0x90 [ 30.500039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.500669] [ 30.500881] Freed by task 212: [ 30.501266] kasan_save_stack+0x22/0x50 [ 30.501756] kasan_set_track+0x25/0x30 [ 30.502238] kasan_save_free_info+0x2b/0x50 [ 30.502770] __kasan_slab_free+0x10a/0x190 [ 30.503295] kmem_cache_free+0x10d/0x4d0 [ 30.503789] rcu_core+0x8c8/0x2860 [ 30.504219] __do_softirq+0x1b7/0x7d4 [ 30.504686] [ 30.504896] Last potentially related work creation: [ 30.505472] kasan_save_stack+0x22/0x50 [ 30.505966] __kasan_record_aux_stack+0x8e/0xa0 [ 30.506533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.507176] remove_vma+0x139/0x170 [ 30.507616] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.508163] do_vmi_munmap+0x1f1/0x2b0 [ 30.508643] __vm_munmap+0x138/0x3a0 [ 30.509104] __x64_sys_munmap+0x59/0x80 [ 30.509595] do_syscall_64+0x3f/0x90 [ 30.510069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.510710] [ 30.510925] The buggy address belongs to the object at ffff88800f28c570 [ 30.510925] which belongs to the cache vm_area_struct of size 168 [ 30.512365] The buggy address is located 88 bytes inside of [ 30.512365] freed 168-byte region [ffff88800f28c570, ffff88800f28c618) [ 30.513762] [ 30.513973] The buggy address belongs to the physical page: [ 30.514627] page:000000007772114b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf28c [ 30.515683] memcg:ffff8880197c7a01 [ 30.516100] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.516732] page_type: 0xffffffff() [ 30.517176] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.518080] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197c7a01 [ 30.518980] page dumped because: kasan: bad access detected [ 30.519624] [ 30.519835] Memory state around the buggy address: [ 30.520413] ffff88800f28c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.521256] ffff88800f28c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.522099] >ffff88800f28c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.522946] ^ [ 30.523608] ffff88800f28c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.524460] ffff88800f28c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.525298] ================================================================== [ 30.526324] Disabling lock debugging due to kernel taint [ 32.546902] BUG: Bad rss-counter state mm:00000000893dedf3 type:MM_FILEPAGES val:33 [ 32.548130] BUG: Bad rss-counter state mm:00000000893dedf3 type:MM_ANONPAGES val:22 [ 32.951160] BUG: Bad rss-counter state mm:00000000818f1096 type:MM_FILEPAGES val:33 [ 32.952104] BUG: Bad rss-counter state mm:00000000818f1096 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62705' (ECDSA) to the list of known hosts. 2023/06/21 03:17:38 fuzzer started 2023/06/21 03:17:39 dialing manager at localhost:36067 2023/06/21 03:17:39 checking machine... 2023/06/21 03:17:39 checking revisions... [ 33.644199] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:17:39 testing simple program... [ 33.688343] cgroup: Unknown subsys name 'net' [ 33.726997] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:17:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016f6a140 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff8181f403 RDI=0000000000000006 RBP=0000000000000000 RSP=ffff88806ce09c48 R8 =0000000000000006 R9 =0000000000000000 R10=00000000000025a6 R11=0000000000000000 R12=1ffff1100d9c138b R13=0000000000000000 R14=ffff888016f6a1e0 R15=ffff888016f6a188 RIP=ffffffff814c0891 RFL=00000206 [-----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=00007fbc2b265c20 CR3=0000000016970000 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=2038333a37313a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a37313a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff8449de36 RDX=00000000000349de RSI=00000000000349de RDI=ffffffff865bc168 RBP=ffff888015c26ff0 RSP=ffff888015c26f28 R8 =0000000000000000 R9 =ffff888015c26fd8 R10=0000000000038001 R11=0000000000020ce4 R12=ffff888015c26ff8 R13=ffff888015c26fe0 R14=ffff888015c26fd9 R15=ffff888015c26f98 RIP=ffffffff8113078b 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 00007fc4c6f5a900 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=00007fc4c6f39020 CR3=0000000019a3e000 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