syzkaller login: [ 30.827435] BUG: Bad rss-counter state mm:00000000bb4b4a42 type:MM_FILEPAGES val:33 [ 30.828737] BUG: Bad rss-counter state mm:00000000bb4b4a42 type:MM_ANONPAGES val:22 [ 30.982554] ================================================================== [ 30.983708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.984892] Read of size 8 at addr ffff8880178fba50 by task sshd/221 [ 30.985965] [ 30.986223] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.987069] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.988050] Call Trace: [ 30.988365] [ 30.988653] dump_stack_lvl+0x91/0xf0 [ 30.989139] print_report+0xcc/0x620 [ 30.989634] ? __virt_addr_valid+0x102/0x340 [ 30.990198] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.990779] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.991360] kasan_report+0xbe/0xf0 [ 30.991811] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.992406] vma_interval_tree_remove+0xc75/0xec0 [ 30.993000] vma_prepare+0xc54/0x11a0 [ 30.993473] __split_vma+0x5af/0x950 [ 30.993960] ? __pfx___split_vma+0x10/0x10 [ 30.994483] ? find_held_lock+0x2c/0x110 [ 30.995004] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.995555] ? lock_is_held_type+0x9f/0x120 [ 30.996090] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.996685] ? mtree_range_walk+0x632/0x900 [ 30.997238] ? mas_walk+0x5c7/0x7c0 [ 30.997703] do_vmi_munmap+0x1f1/0x2b0 [ 30.998197] mmap_region+0x1f9/0x2660 [ 30.998673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.999186] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.999886] ? __pfx_lock_acquire+0x10/0x10 [ 31.000410] ? __pfx_mmap_region+0x10/0x10 [ 31.000934] ? security_mmap_addr+0x7d/0xa0 [ 31.001474] ? get_unmapped_area+0x1f5/0x3f0 [ 31.002039] do_mmap+0x854/0xf00 [ 31.002479] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.002969] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.003531] ksys_mmap_pgoff+0x3af/0x500 [ 31.004040] do_syscall_64+0x3f/0x90 [ 31.004517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.005157] RIP: 0033:0x7f6bcdddbd82 [ 31.005610] 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 [ 31.007735] RSP: 002b:00007ffca1346c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.008646] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6bcdddbd82 [ 31.009476] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6bcd215000 [ 31.010332] RBP: 00007f6bcd215000 R08: 0000000000000009 R09: 0000000000001000 [ 31.011254] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1df93dec0 [ 31.012285] R13: 00007ffca1346c20 R14: 00007ffca1346c50 R15: 00007ffca1346fb0 [ 31.013129] [ 31.013425] [ 31.013643] Allocated by task 214: [ 31.014075] kasan_save_stack+0x22/0x50 [ 31.014576] kasan_set_track+0x25/0x30 [ 31.015070] __kasan_slab_alloc+0x59/0x70 [ 31.015582] kmem_cache_alloc+0x16b/0x370 [ 31.016090] vm_area_dup+0x20/0x160 [ 31.016543] __split_vma+0x170/0x950 [ 31.017003] split_vma+0xc6/0x110 [ 31.017438] mprotect_fixup+0x8d2/0xb30 [ 31.017938] do_mprotect_pkey+0x87e/0xd40 [ 31.018445] __x64_sys_mprotect+0x78/0xc0 [ 31.018966] do_syscall_64+0x3f/0x90 [ 31.019431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.020060] [ 31.020275] Freed by task 214: [ 31.020667] kasan_save_stack+0x22/0x50 [ 31.021167] kasan_set_track+0x25/0x30 [ 31.021652] kasan_save_free_info+0x2b/0x50 [ 31.022202] __kasan_slab_free+0x10a/0x190 [ 31.022728] kmem_cache_free+0x10d/0x4d0 [ 31.023223] rcu_core+0x8c8/0x2860 [ 31.023663] __do_softirq+0x1b7/0x7d4 [ 31.024139] [ 31.024355] Last potentially related work creation: [ 31.024935] kasan_save_stack+0x22/0x50 [ 31.025433] __kasan_record_aux_stack+0x8e/0xa0 [ 31.026015] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.026648] remove_vma+0x139/0x170 [ 31.027100] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.027643] do_vmi_munmap+0x1f1/0x2b0 [ 31.028099] __vm_munmap+0x138/0x3a0 [ 31.028548] __x64_sys_munmap+0x59/0x80 [ 31.029038] do_syscall_64+0x3f/0x90 [ 31.029506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.030150] [ 31.030363] The buggy address belongs to the object at ffff8880178fb9f8 [ 31.030363] which belongs to the cache vm_area_struct of size 168 [ 31.031829] The buggy address is located 88 bytes inside of [ 31.031829] freed 168-byte region [ffff8880178fb9f8, ffff8880178fbaa0) [ 31.033233] [ 31.033450] The buggy address belongs to the physical page: [ 31.034121] page:00000000446c23f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x178fb [ 31.035207] memcg:ffff888009334a01 [ 31.035629] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.036277] page_type: 0xffffffff() [ 31.036725] raw: 0100000000000200 ffff8880087a0c80 ffffea000039bac0 dead000000000008 [ 31.037635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009334a01 [ 31.038544] page dumped because: kasan: bad access detected [ 31.039197] [ 31.039407] Memory state around the buggy address: [ 31.039987] ffff8880178fb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.040840] ffff8880178fb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.041688] >ffff8880178fba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.042563] ^ [ 31.043258] ffff8880178fba80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.044110] ffff8880178fbb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.044952] ================================================================== [ 31.045962] Disabling lock debugging due to kernel taint [ 33.083112] BUG: Bad rss-counter state mm:00000000c35cbe89 type:MM_FILEPAGES val:33 [ 33.084415] BUG: Bad rss-counter state mm:00000000c35cbe89 type:MM_ANONPAGES val:22 [ 33.520112] BUG: Bad rss-counter state mm:000000001161d534 type:MM_FILEPAGES val:33 [ 33.521353] BUG: Bad rss-counter state mm:000000001161d534 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25000' (ECDSA) to the list of known hosts. 2023/06/20 18:55:41 fuzzer started 2023/06/20 18:55:42 dialing manager at localhost:36067 2023/06/20 18:55:42 checking machine... 2023/06/20 18:55:42 checking revisions... [ 34.239013] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:55:42 testing simple program... [ 34.291986] cgroup: Unknown subsys name 'net' [ 34.333400] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:55:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f05682ba110 CR3=000000000f0b0000 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=2031343a35353a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a35353a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000d RCX=ffffffff8449cc1f RDX=ffff888015db1b40 RSI=0000000000000000 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff888018d9f0a0 R8 =0000000000000000 R9 =000000000000000d R10=000000000000000e R11=000055fe91016000 R12=ffff88800c633c80 R13=000000000000000e R14=000000000000000d R15=0000000000000060 RIP=ffffffff814c0860 RFL=00000297 [--S-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 00007f8f08dd5900 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=00007f8f08d9f008 CR3=00000000099ca000 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