syzkaller login: [ 61.163406] BUG: Bad rss-counter state mm:00000000f60773e5 type:MM_FILEPAGES val:33 [ 61.164388] BUG: Bad rss-counter state mm:00000000f60773e5 type:MM_ANONPAGES val:22 [ 61.326835] ================================================================== [ 61.327716] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.328655] Read of size 8 at addr ffff88800dc696b0 by task sshd/220 [ 61.329409] [ 61.329671] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.330653] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.331628] Call Trace: [ 61.331950] [ 61.332376] dump_stack_lvl+0x91/0xf0 [ 61.332960] print_report+0xcc/0x620 [ 61.333529] ? __virt_addr_valid+0x102/0x340 [ 61.334192] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.334915] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.335644] kasan_report+0xbe/0xf0 [ 61.336216] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.336967] vma_interval_tree_remove+0xc75/0xec0 [ 61.337697] vma_prepare+0xc54/0x11a0 [ 61.338291] __split_vma+0x5af/0x950 [ 61.338862] ? __pfx___split_vma+0x10/0x10 [ 61.339500] ? find_held_lock+0x2c/0x110 [ 61.340129] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.340812] ? lock_is_held_type+0x9f/0x120 [ 61.341464] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.342217] ? mtree_range_walk+0x632/0x900 [ 61.342799] ? mas_walk+0x5c7/0x7c0 [ 61.343273] do_vmi_munmap+0x1f1/0x2b0 [ 61.343760] mmap_region+0x1f9/0x2660 [ 61.344233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.344731] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.345425] ? __pfx_lock_acquire+0x10/0x10 [ 61.345959] ? __pfx_mmap_region+0x10/0x10 [ 61.346478] ? security_mmap_addr+0x7d/0xa0 [ 61.346996] ? get_unmapped_area+0x1f5/0x3f0 [ 61.347543] do_mmap+0x854/0xf00 [ 61.347979] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.348467] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.349019] ksys_mmap_pgoff+0x3af/0x500 [ 61.349513] do_syscall_64+0x3f/0x90 [ 61.349989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.350647] RIP: 0033:0x7f8509f71d82 [ 61.351095] 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 [ 61.353211] RSP: 002b:00007ffe4b38ac58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.354140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8509f71d82 [ 61.354990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85093ab000 [ 61.355843] RBP: 00007f85093ab000 R08: 0000000000000009 R09: 0000000000001000 [ 61.356690] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a1d3862ec0 [ 61.357541] R13: 00007ffe4b38ac70 R14: 00007ffe4b38aca0 R15: 00007ffe4b38b000 [ 61.358400] [ 61.358692] [ 61.358904] Allocated by task 213: [ 61.359327] kasan_save_stack+0x22/0x50 [ 61.359824] kasan_set_track+0x25/0x30 [ 61.360315] __kasan_slab_alloc+0x59/0x70 [ 61.360833] kmem_cache_alloc+0x16b/0x370 [ 61.361347] vm_area_dup+0x20/0x160 [ 61.361809] __split_vma+0x170/0x950 [ 61.362268] split_vma+0xc6/0x110 [ 61.362704] mprotect_fixup+0x8d2/0xb30 [ 61.363200] do_mprotect_pkey+0x87e/0xd40 [ 61.363710] __x64_sys_mprotect+0x78/0xc0 [ 61.364223] do_syscall_64+0x3f/0x90 [ 61.364687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.365318] [ 61.365565] Freed by task 213: [ 61.365967] kasan_save_stack+0x22/0x50 [ 61.366470] kasan_set_track+0x25/0x30 [ 61.366969] kasan_save_free_info+0x2b/0x50 [ 61.367497] __kasan_slab_free+0x10a/0x190 [ 61.368019] kmem_cache_free+0x10d/0x4d0 [ 61.368521] rcu_core+0x8c8/0x2860 [ 61.368959] __do_softirq+0x1b7/0x7d4 [ 61.369426] [ 61.369640] Last potentially related work creation: [ 61.370234] kasan_save_stack+0x22/0x50 [ 61.370733] __kasan_record_aux_stack+0x8e/0xa0 [ 61.371295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.371935] remove_vma+0x139/0x170 [ 61.372382] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.372935] do_vmi_munmap+0x1f1/0x2b0 [ 61.373410] __vm_munmap+0x138/0x3a0 [ 61.373877] __x64_sys_munmap+0x59/0x80 [ 61.374362] do_syscall_64+0x3f/0x90 [ 61.374827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.375463] [ 61.375681] Second to last potentially related work creation: [ 61.376355] kasan_save_stack+0x22/0x50 [ 61.376848] __kasan_record_aux_stack+0x8e/0xa0 [ 61.377409] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.378080] remove_vma+0x139/0x170 [ 61.378532] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.379094] do_vmi_munmap+0x1f1/0x2b0 [ 61.379576] move_vma.constprop.0+0x88a/0x1ba0 [ 61.380147] __do_sys_mremap+0xb78/0x1780 [ 61.380668] do_syscall_64+0x3f/0x90 [ 61.381136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.381811] [ 61.382024] The buggy address belongs to the object at ffff88800dc69658 [ 61.382024] which belongs to the cache vm_area_struct of size 168 [ 61.383482] The buggy address is located 88 bytes inside of [ 61.383482] freed 168-byte region [ffff88800dc69658, ffff88800dc69700) [ 61.384871] [ 61.385084] The buggy address belongs to the physical page: [ 61.385739] page:0000000083502172 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc69 [ 61.386841] memcg:ffff88800e196201 [ 61.387271] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.387919] page_type: 0xffffffff() [ 61.388367] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 61.389298] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e196201 [ 61.390196] page dumped because: kasan: bad access detected [ 61.390866] [ 61.391085] Memory state around the buggy address: [ 61.391660] ffff88800dc69580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.392502] ffff88800dc69600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 61.393350] >ffff88800dc69680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.394201] ^ [ 61.394784] ffff88800dc69700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.395623] ffff88800dc69780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.396461] ================================================================== [ 61.397610] Disabling lock debugging due to kernel taint [ 63.605857] BUG: Bad rss-counter state mm:0000000022bf1e03 type:MM_FILEPAGES val:33 [ 63.606646] BUG: Bad rss-counter state mm:0000000022bf1e03 type:MM_ANONPAGES val:22 [ 64.034616] BUG: Bad rss-counter state mm:0000000020e1af11 type:MM_FILEPAGES val:33 [ 64.035755] BUG: Bad rss-counter state mm:0000000020e1af11 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38373' (ECDSA) to the list of known hosts. 2023/06/20 15:35:18 fuzzer started 2023/06/20 15:35:19 dialing manager at localhost:36067 2023/06/20 15:35:19 checking machine... 2023/06/20 15:35:19 checking revisions... [ 64.753287] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:35:19 testing simple program... [ 64.804867] cgroup: Unknown subsys name 'net' [ 64.855657] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:35:18 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=000000000010bc80 RCX=0000556d19d7af26 RDX=00007fff4b6600a8 RSI=00007fff4b6600a8 RDI=0000556d1a4cb2a0 RBP=00007fff4b660138 RSP=00007fff4b6600a0 R8 =0000000000000051 R9 =000000000010bc80 R10=0000000000000002 R11=000000000052545f R12=00007f5ed55c3c80 R13=0000556d1a4ca290 R14=0000000000000001 R15=00007fff4b6600b0 RIP=00007f5ed6c50475 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5ed60cd900 00000000 00000000 GS =0000 0000000000000000 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=00007f5ed5524d20 CR3=00000000145e0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=671adc30373d412b00000000000ae988 XMM05=3d1897a5f45a7c700000000000133c18 XMM06=4fda316b135da52b0000000000132a08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d15f94 RBX=dffffc0000000000 RCX=0000000000000001 RDX=ffff88800db4cb80 RSI=0000000000000001 RDI=ffff8880161cdbe8 RBP=ffff8880161cdbe8 RSP=ffff88800e8afc78 R8 =0000000000000003 R9 =0000000000004000 R10=0000000000008000 R11=7962206d65687420 R12=0000000000000001 R13=0000000000000001 R14=ffff88800db4cb80 R15=0000000000000001 RIP=ffffffff8198b1eb RFL=00000212 [----A--] 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 00007f85a58fa900 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=00007ffe4350b000 CR3=000000000cb6e000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000