syzkaller login: [ 42.757872] BUG: Bad rss-counter state mm:00000000c5f3826d type:MM_FILEPAGES val:33 [ 42.758759] BUG: Bad rss-counter state mm:00000000c5f3826d type:MM_ANONPAGES val:22 [ 42.936460] ================================================================== [ 42.937101] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.937743] Read of size 8 at addr ffff888019e53228 by task sshd/219 [ 42.938267] [ 42.938415] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.938978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.939609] Call Trace: [ 42.939823] [ 42.940009] dump_stack_lvl+0x91/0xf0 [ 42.940335] print_report+0xcc/0x620 [ 42.940662] ? __virt_addr_valid+0x102/0x340 [ 42.941032] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.941444] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.941882] kasan_report+0xbe/0xf0 [ 42.942507] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.942921] vma_interval_tree_remove+0xc75/0xec0 [ 42.943324] vma_prepare+0xc54/0x11a0 [ 42.943648] __split_vma+0x5af/0x950 [ 42.943968] ? __pfx___split_vma+0x10/0x10 [ 42.944322] ? find_held_lock+0x2c/0x110 [ 42.944674] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.945045] ? lock_is_held_type+0x9f/0x120 [ 42.945403] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.957909] ? mtree_range_walk+0x632/0x900 [ 42.958294] ? mas_walk+0x5c7/0x7c0 [ 42.958617] do_vmi_munmap+0x1f1/0x2b0 [ 42.958957] mmap_region+0x1f9/0x2660 [ 42.959281] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.959620] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.960092] ? __pfx_lock_acquire+0x10/0x10 [ 42.960446] ? __pfx_mmap_region+0x10/0x10 [ 42.960807] ? security_mmap_addr+0x7d/0xa0 [ 42.961159] ? get_unmapped_area+0x1f5/0x3f0 [ 42.961534] do_mmap+0x854/0xf00 [ 42.961854] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.962192] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.962573] ksys_mmap_pgoff+0x3af/0x500 [ 42.962918] do_syscall_64+0x3f/0x90 [ 42.963247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.963680] RIP: 0033:0x7ff2f720ed82 [ 42.963989] 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 [ 42.965392] RSP: 002b:00007ffebb30a3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.966040] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2f720ed82 [ 42.966598] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2f6648000 [ 42.967156] RBP: 00007ff2f6648000 R08: 0000000000000009 R09: 0000000000001000 [ 42.967717] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bbaf759f70 [ 42.968274] R13: 00007ffebb30a3e0 R14: 00007ffebb30a410 R15: 00007ffebb30a770 [ 42.968841] [ 42.969038] [ 42.969188] Allocated by task 212: [ 42.969476] kasan_save_stack+0x22/0x50 [ 42.969839] kasan_set_track+0x25/0x30 [ 42.970175] __kasan_slab_alloc+0x59/0x70 [ 42.970528] kmem_cache_alloc+0x16b/0x370 [ 42.970875] vm_area_dup+0x20/0x160 [ 42.971188] __split_vma+0x170/0x950 [ 42.971500] split_vma+0xc6/0x110 [ 42.971797] mprotect_fixup+0x8d2/0xb30 [ 42.972141] do_mprotect_pkey+0x87e/0xd40 [ 42.972488] __x64_sys_mprotect+0x78/0xc0 [ 42.972841] do_syscall_64+0x3f/0x90 [ 42.973161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.973591] [ 42.973777] Freed by task 0: [ 42.974028] kasan_save_stack+0x22/0x50 [ 42.974367] kasan_set_track+0x25/0x30 [ 42.974699] kasan_save_free_info+0x2b/0x50 [ 42.975057] __kasan_slab_free+0x10a/0x190 [ 42.975416] kmem_cache_free+0x10d/0x4d0 [ 42.975761] rcu_core+0x8c8/0x2860 [ 42.976061] __do_softirq+0x1b7/0x7d4 [ 42.976389] [ 42.976536] Last potentially related work creation: [ 42.976921] kasan_save_stack+0x22/0x50 [ 42.977269] __kasan_record_aux_stack+0x8e/0xa0 [ 42.977648] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.978121] remove_vma+0x139/0x170 [ 42.978427] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.978798] do_vmi_munmap+0x1f1/0x2b0 [ 42.979130] __vm_munmap+0x138/0x3a0 [ 42.979445] __x64_sys_munmap+0x59/0x80 [ 42.979778] do_syscall_64+0x3f/0x90 [ 42.980100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.980533] [ 42.980679] The buggy address belongs to the object at ffff888019e531d0 [ 42.980679] which belongs to the cache vm_area_struct of size 168 [ 42.981642] The buggy address is located 88 bytes inside of [ 42.981642] freed 168-byte region [ffff888019e531d0, ffff888019e53278) [ 42.982608] [ 42.982756] The buggy address belongs to the physical page: [ 42.983193] page:00000000bc3609c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e53 [ 42.983916] memcg:ffff888006821001 [ 42.984200] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.984627] page_type: 0xffffffff() [ 42.984934] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.985540] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006821001 [ 42.986179] page dumped because: kasan: bad access detected [ 42.986620] [ 42.986769] Memory state around the buggy address: [ 42.987157] ffff888019e53100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.987724] ffff888019e53180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 42.988287] >ffff888019e53200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 42.988851] ^ [ 42.989223] ffff888019e53280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 42.989809] ffff888019e53300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 42.990367] ================================================================== [ 42.991056] Disabling lock debugging due to kernel taint [ 46.068212] BUG: Bad rss-counter state mm:0000000062e7da9a type:MM_FILEPAGES val:33 [ 46.068889] BUG: Bad rss-counter state mm:0000000062e7da9a type:MM_ANONPAGES val:22 [ 47.726200] BUG: Bad rss-counter state mm:00000000db01e523 type:MM_FILEPAGES val:33 [ 47.726892] BUG: Bad rss-counter state mm:00000000db01e523 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52444' (ECDSA) to the list of known hosts. 2023/06/20 08:22:20 fuzzer started 2023/06/20 08:22:20 dialing manager at localhost:44161 2023/06/20 08:22:21 checking machine... 2023/06/20 08:22:21 checking revisions... [ 48.721860] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:22:21 testing simple program... [ 48.784503] cgroup: Unknown subsys name 'net' [ 48.863252] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:22:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81651d97 RDX=000000000000651d RSI=000000000000651d RDI=ffffffff86501034 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000000 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8113077a RFL=00000217 [----APC] 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=00007f4321982328 CR3=0000000005482000 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=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=dffffc0000000000 RBX=ffff888013e90000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff888013e903f4 RBP=ffff888013e90000 RSP=ffff88800ca3f8d8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f8342fdcd82 R13=0000000000000000 R14=ffff888013e90000 R15=ffff88801ccb1e40 RIP=ffffffff8135bd9a RFL=00000217 [----APC] 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 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=00007f8342b96008 CR3=000000000c712000 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=732e747079726362696c2f756e672d78 XMM02=00312e6f732e747079726362696c2f75 XMM03=6e672d78756e696c2d34365f3638782f XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000