syzkaller login: [ 68.800549] BUG: Bad rss-counter state mm:00000000934f473e type:MM_FILEPAGES val:33 [ 68.801633] BUG: Bad rss-counter state mm:00000000934f473e type:MM_ANONPAGES val:22 [ 68.974093] ================================================================== [ 68.975090] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.976289] Read of size 8 at addr ffff888015cf0140 by task sshd/228 [ 68.977242] [ 68.977481] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.978469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.979530] Call Trace: [ 68.979895] [ 68.980208] dump_stack_lvl+0x91/0xf0 [ 68.980768] print_report+0xcc/0x620 [ 68.981285] ? __virt_addr_valid+0x102/0x340 [ 68.981893] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.982573] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.983249] kasan_report+0xbe/0xf0 [ 68.983780] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.984468] vma_interval_tree_remove+0xc75/0xec0 [ 68.985144] vma_prepare+0xc54/0x11a0 [ 68.985687] __split_vma+0x5af/0x950 [ 68.986230] ? __pfx___split_vma+0x10/0x10 [ 68.986823] ? find_held_lock+0x2c/0x110 [ 68.987403] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.988027] ? lock_is_held_type+0x9f/0x120 [ 68.988622] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.989321] ? mtree_range_walk+0x632/0x900 [ 68.989969] ? mas_walk+0x5c7/0x7c0 [ 68.990498] do_vmi_munmap+0x1f1/0x2b0 [ 68.991042] mmap_region+0x1f9/0x2660 [ 68.991574] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.992154] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.992965] ? __pfx_lock_acquire+0x10/0x10 [ 68.993549] ? __pfx_mmap_region+0x10/0x10 [ 68.994148] ? security_mmap_addr+0x7d/0xa0 [ 68.994750] ? get_unmapped_area+0x1f5/0x3f0 [ 68.995349] do_mmap+0x854/0xf00 [ 68.995848] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.996399] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.997032] ksys_mmap_pgoff+0x3af/0x500 [ 68.997586] do_syscall_64+0x3f/0x90 [ 68.998153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.998865] RIP: 0033:0x7fe20cdb2d82 [ 68.999352] 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 [ 69.001689] RSP: 002b:00007fff47c9b008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.002731] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe20cdb2d82 [ 69.003676] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe20c1ec000 [ 69.004588] RBP: 00007fe20c1ec000 R08: 0000000000000009 R09: 0000000000001000 [ 69.005536] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6f3671ec0 [ 69.006478] R13: 00007fff47c9b020 R14: 00007fff47c9b050 R15: 00007fff47c9b3b0 [ 69.007418] [ 69.007747] [ 69.007984] Allocated by task 221: [ 69.008449] kasan_save_stack+0x22/0x50 [ 69.009071] kasan_set_track+0x25/0x30 [ 69.009644] __kasan_slab_alloc+0x59/0x70 [ 69.010255] kmem_cache_alloc+0x16b/0x370 [ 69.010839] vm_area_dup+0x20/0x160 [ 69.011349] __split_vma+0x170/0x950 [ 69.011879] split_vma+0xc6/0x110 [ 69.012375] mprotect_fixup+0x8d2/0xb30 [ 69.012956] do_mprotect_pkey+0x87e/0xd40 [ 69.013527] __x64_sys_mprotect+0x78/0xc0 [ 69.014113] do_syscall_64+0x3f/0x90 [ 69.014663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.015361] [ 69.015604] Freed by task 202: [ 69.016045] kasan_save_stack+0x22/0x50 [ 69.016598] kasan_set_track+0x25/0x30 [ 69.017330] kasan_save_free_info+0x2b/0x50 [ 69.017931] __kasan_slab_free+0x10a/0x190 [ 69.018545] kmem_cache_free+0x10d/0x4d0 [ 69.019099] rcu_core+0x8c8/0x2860 [ 69.019586] __do_softirq+0x1b7/0x7d4 [ 69.020110] [ 69.020346] Last potentially related work creation: [ 69.020997] kasan_save_stack+0x22/0x50 [ 69.021563] __kasan_record_aux_stack+0x8e/0xa0 [ 69.022206] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.022923] remove_vma+0x139/0x170 [ 69.023504] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.024229] do_vmi_munmap+0x1f1/0x2b0 [ 69.024795] __vm_munmap+0x138/0x3a0 [ 69.025319] __x64_sys_munmap+0x59/0x80 [ 69.025873] do_syscall_64+0x3f/0x90 [ 69.026409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.027115] [ 69.027349] The buggy address belongs to the object at ffff888015cf00e8 [ 69.027349] which belongs to the cache vm_area_struct of size 168 [ 69.028974] The buggy address is located 88 bytes inside of [ 69.028974] freed 168-byte region [ffff888015cf00e8, ffff888015cf0190) [ 69.030554] [ 69.030807] The buggy address belongs to the physical page: [ 69.031529] page:000000001e7cd18a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15cf0 [ 69.032740] memcg:ffff88801645c601 [ 69.033213] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.033957] page_type: 0xffffffff() [ 69.034465] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.035508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801645c601 [ 69.036522] page dumped because: kasan: bad access detected [ 69.037265] [ 69.037500] Memory state around the buggy address: [ 69.038164] ffff888015cf0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.039121] ffff888015cf0080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 69.040069] >ffff888015cf0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.041030] ^ [ 69.041755] ffff888015cf0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 69.042732] ffff888015cf0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 69.043685] ================================================================== [ 69.044705] Disabling lock debugging due to kernel taint [ 70.679743] BUG: Bad rss-counter state mm:00000000ad80d0aa type:MM_FILEPAGES val:33 [ 70.680895] BUG: Bad rss-counter state mm:00000000ad80d0aa type:MM_ANONPAGES val:22 [ 70.999095] BUG: Bad rss-counter state mm:00000000cb07c1a7 type:MM_FILEPAGES val:33 [ 71.000142] BUG: Bad rss-counter state mm:00000000cb07c1a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29497' (ECDSA) to the list of known hosts. 2023/06/20 18:35:54 fuzzer started 2023/06/20 18:35:55 dialing manager at localhost:36067 2023/06/20 18:35:55 checking machine... 2023/06/20 18:35:55 checking revisions... [ 71.675543] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:35:55 testing simple program... [ 71.724292] cgroup: Unknown subsys name 'net' [ 71.767832] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:35:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800dace1b0 RCX=0000000000000000 RDX=1ffff11001b59c43 RSI=ffffffff817169fd RDI=ffff88800dace1b0 RBP=ffff88800dace218 RSP=ffff888016ccfd48 R8 =0000000000000004 R9 =000000000000002e R10=000000000000010e R11=0000000000000000 R12=1ffff11002d99faa R13=ffff88800dd30580 R14=ffff88800dd30598 R15=ffff88800dd305a0 RIP=ffffffff812bc639 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc14fbd5900 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=00007fc1503473ec CR3=0000000018eca000 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=00007fb0503193e0 CR3=000000000ca9c000 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=2034353a35333a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a35333a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000