syzkaller login: [ 28.756967] sshd (213) used greatest stack depth: 24128 bytes left [ 28.757997] BUG: Bad rss-counter state mm:00000000c3ae608e type:MM_FILEPAGES val:33 [ 28.759265] BUG: Bad rss-counter state mm:00000000c3ae608e type:MM_ANONPAGES val:22 [ 28.930634] ================================================================== [ 28.931626] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.932645] Read of size 8 at addr ffff88801462e310 by task sshd/220 [ 28.933557] [ 28.933789] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.934728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.935790] Call Trace: [ 28.936138] [ 28.936450] dump_stack_lvl+0x91/0xf0 [ 28.936980] print_report+0xcc/0x620 [ 28.937509] ? __virt_addr_valid+0x102/0x340 [ 28.938106] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.938783] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.939462] kasan_report+0xbe/0xf0 [ 28.939982] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.940675] vma_interval_tree_remove+0xc75/0xec0 [ 28.941342] vma_prepare+0xc54/0x11a0 [ 28.941869] __split_vma+0x5af/0x950 [ 28.942416] ? __pfx___split_vma+0x10/0x10 [ 28.942992] ? find_held_lock+0x2c/0x110 [ 28.943570] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.944193] ? lock_is_held_type+0x9f/0x120 [ 28.944790] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.945460] ? mtree_range_walk+0x632/0x900 [ 28.946070] ? mas_walk+0x5c7/0x7c0 [ 28.946613] do_vmi_munmap+0x1f1/0x2b0 [ 28.947152] mmap_region+0x1f9/0x2660 [ 28.947682] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.948245] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.949035] ? __pfx_lock_acquire+0x10/0x10 [ 28.949630] ? __pfx_mmap_region+0x10/0x10 [ 28.950215] ? security_mmap_addr+0x7d/0xa0 [ 28.950818] ? get_unmapped_area+0x1f5/0x3f0 [ 28.951425] do_mmap+0x854/0xf00 [ 28.951910] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.952461] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.953081] ksys_mmap_pgoff+0x3af/0x500 [ 28.953639] do_syscall_64+0x3f/0x90 [ 28.954170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.954908] RIP: 0033:0x7fc41e078d82 [ 28.955407] 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 [ 28.957761] RSP: 002b:00007ffd6764de98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.958776] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc41e078d82 [ 28.959708] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc41d4b2000 [ 28.960641] RBP: 00007fc41d4b2000 R08: 0000000000000009 R09: 0000000000001000 [ 28.961577] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562aaf987ec0 [ 28.962527] R13: 00007ffd6764deb0 R14: 00007ffd6764dee0 R15: 00007ffd6764e240 [ 28.963476] [ 28.963794] [ 28.964032] Allocated by task 213: [ 28.964512] kasan_save_stack+0x22/0x50 [ 28.965057] kasan_set_track+0x25/0x30 [ 28.965606] __kasan_slab_alloc+0x59/0x70 [ 28.966176] kmem_cache_alloc+0x16b/0x370 [ 28.966752] vm_area_dup+0x20/0x160 [ 28.967259] __split_vma+0x170/0x950 [ 28.967768] split_vma+0xc6/0x110 [ 28.968247] mprotect_fixup+0x8d2/0xb30 [ 28.968796] do_mprotect_pkey+0x87e/0xd40 [ 28.969373] __x64_sys_mprotect+0x78/0xc0 [ 28.969942] do_syscall_64+0x3f/0x90 [ 28.970471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.971189] [ 28.971426] Freed by task 213: [ 28.971859] kasan_save_stack+0x22/0x50 [ 28.972411] kasan_set_track+0x25/0x30 [ 28.972956] kasan_save_free_info+0x2b/0x50 [ 28.973542] __kasan_slab_free+0x10a/0x190 [ 28.974138] kmem_cache_free+0x10d/0x4d0 [ 28.974720] rcu_core+0x8c8/0x2860 [ 28.975205] __do_softirq+0x1b7/0x7d4 [ 28.975734] [ 28.975971] Last potentially related work creation: [ 28.976623] kasan_save_stack+0x22/0x50 [ 28.977188] __kasan_record_aux_stack+0x8e/0xa0 [ 28.977820] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.978535] remove_vma+0x139/0x170 [ 28.979028] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.979645] do_vmi_munmap+0x1f1/0x2b0 [ 28.980180] __vm_munmap+0x138/0x3a0 [ 28.980697] __x64_sys_munmap+0x59/0x80 [ 28.981240] do_syscall_64+0x3f/0x90 [ 28.981757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.982478] [ 28.982711] The buggy address belongs to the object at ffff88801462e2b8 [ 28.982711] which belongs to the cache vm_area_struct of size 168 [ 28.984316] The buggy address is located 88 bytes inside of [ 28.984316] freed 168-byte region [ffff88801462e2b8, ffff88801462e360) [ 28.985865] [ 28.986100] The buggy address belongs to the physical page: [ 28.986834] page:00000000739863da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1462e [ 28.988014] memcg:ffff88800e256b01 [ 28.988481] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.989208] page_type: 0xffffffff() [ 28.989723] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.990738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e256b01 [ 28.991746] page dumped because: kasan: bad access detected [ 28.992480] [ 28.992719] Memory state around the buggy address: [ 28.993358] ffff88801462e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 28.994325] ffff88801462e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.995279] >ffff88801462e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.996224] ^ [ 28.996743] ffff88801462e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.997700] ffff88801462e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.998657] ================================================================== [ 28.999779] Disabling lock debugging due to kernel taint [ 30.944645] BUG: Bad rss-counter state mm:000000007569175d type:MM_FILEPAGES val:33 [ 30.945683] BUG: Bad rss-counter state mm:000000007569175d type:MM_ANONPAGES val:22 [ 31.487770] BUG: Bad rss-counter state mm:000000002a5ab215 type:MM_FILEPAGES val:33 [ 31.488932] BUG: Bad rss-counter state mm:000000002a5ab215 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5673' (ECDSA) to the list of known hosts. 2023/06/21 05:40:47 fuzzer started 2023/06/21 05:40:47 dialing manager at localhost:36067 2023/06/21 05:40:47 checking machine... 2023/06/21 05:40:47 checking revisions... [ 32.157483] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:40:47 testing simple program... [ 32.200572] cgroup: Unknown subsys name 'net' [ 32.251754] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:40:47 Registers: info registers vcpu 0 RAX=ffff88800e59a780 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800d6b7d01 RSI=ffff88800d6b7db0 RDI=ffff88800d6b7db0 RBP=ffff88800d6b79b0 RSP=ffff88800d6b78e8 R8 =0000000000000001 R9 =ffff88800d6b7998 R10=0000000000038001 R11=0000000000024253 R12=ffff88800d6b79b8 R13=ffff88800d6b79a0 R14=ffff88800d6b7db0 R15=ffff88800d6b7958 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007fc03619a900 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=00007ffefdf6b000 CR3=000000001c9e0000 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=00007f842cb61010 CR3=000000000db0e000 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=2037343a30343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a30343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000