syzkaller login: [ 42.949819] BUG: Bad rss-counter state mm:0000000097b11d38 type:MM_FILEPAGES val:33 [ 42.951139] BUG: Bad rss-counter state mm:0000000097b11d38 type:MM_ANONPAGES val:22 [ 42.994264] ================================================================== [ 42.994863] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.995460] Read of size 8 at addr ffff88800e696228 by task sshd/221 [ 42.995939] [ 42.996073] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.996608] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.997312] Call Trace: [ 42.997519] [ 42.997697] dump_stack_lvl+0x91/0xf0 [ 42.998005] print_report+0xcc/0x620 [ 42.998312] ? __virt_addr_valid+0x102/0x340 [ 42.998659] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.999051] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.999446] kasan_report+0xbe/0xf0 [ 42.999742] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.000140] vma_interval_tree_remove+0xc75/0xec0 [ 43.000517] vma_prepare+0xc54/0x11a0 [ 43.000819] __split_vma+0x5af/0x950 [ 43.001109] ? __pfx___split_vma+0x10/0x10 [ 43.001439] ? find_held_lock+0x2c/0x110 [ 43.001767] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.002120] ? lock_is_held_type+0x9f/0x120 [ 43.002456] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.002841] ? mtree_range_walk+0x632/0x900 [ 43.003191] ? mas_walk+0x5c7/0x7c0 [ 43.003486] do_vmi_munmap+0x1f1/0x2b0 [ 43.003795] mmap_region+0x1f9/0x2660 [ 43.004091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.004410] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.004852] ? __pfx_lock_acquire+0x10/0x10 [ 43.005180] ? __pfx_mmap_region+0x10/0x10 [ 43.005510] ? security_mmap_addr+0x7d/0xa0 [ 43.005851] ? get_unmapped_area+0x1f5/0x3f0 [ 43.006196] do_mmap+0x854/0xf00 [ 43.006471] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.006796] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.007140] ksys_mmap_pgoff+0x3af/0x500 [ 43.007449] do_syscall_64+0x3f/0x90 [ 43.007744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.008142] RIP: 0033:0x7f5ba39f7d82 [ 43.008426] 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 [ 43.009752] RSP: 002b:00007fff505ba5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.010316] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ba39f7d82 [ 43.010857] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ba2e31000 [ 43.011387] RBP: 00007f5ba2e31000 R08: 0000000000000009 R09: 0000000000001000 [ 43.011917] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a88f552ec0 [ 43.012446] R13: 00007fff505ba5e0 R14: 00007fff505ba610 R15: 00007fff505ba970 [ 43.012974] [ 43.013155] [ 43.013290] Allocated by task 214: [ 43.013552] kasan_save_stack+0x22/0x50 [ 43.013864] kasan_set_track+0x25/0x30 [ 43.014170] __kasan_slab_alloc+0x59/0x70 [ 43.014492] kmem_cache_alloc+0x16b/0x370 [ 43.014815] vm_area_dup+0x20/0x160 [ 43.015098] __split_vma+0x170/0x950 [ 43.015390] split_vma+0xc6/0x110 [ 43.015662] mprotect_fixup+0x8d2/0xb30 [ 43.015978] do_mprotect_pkey+0x87e/0xd40 [ 43.016300] __x64_sys_mprotect+0x78/0xc0 [ 43.016622] do_syscall_64+0x3f/0x90 [ 43.016915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.017314] [ 43.017447] Freed by task 214: [ 43.017693] kasan_save_stack+0x22/0x50 [ 43.018008] kasan_set_track+0x25/0x30 [ 43.018317] kasan_save_free_info+0x2b/0x50 [ 43.018645] __kasan_slab_free+0x10a/0x190 [ 43.018992] kmem_cache_free+0x10d/0x4d0 [ 43.019313] rcu_core+0x8c8/0x2860 [ 43.019593] __do_softirq+0x1b7/0x7d4 [ 43.019892] [ 43.020023] Last potentially related work creation: [ 43.020389] kasan_save_stack+0x22/0x50 [ 43.020701] __kasan_record_aux_stack+0x8e/0xa0 [ 43.021061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.021463] remove_vma+0x139/0x170 [ 43.021745] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.022097] do_vmi_munmap+0x1f1/0x2b0 [ 43.022393] __vm_munmap+0x138/0x3a0 [ 43.022688] __x64_sys_munmap+0x59/0x80 [ 43.022999] do_syscall_64+0x3f/0x90 [ 43.023292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.023689] [ 43.023824] The buggy address belongs to the object at ffff88800e6961d0 [ 43.023824] which belongs to the cache vm_area_struct of size 168 [ 43.024743] The buggy address is located 88 bytes inside of [ 43.024743] freed 168-byte region [ffff88800e6961d0, ffff88800e696278) [ 43.025622] [ 43.025755] The buggy address belongs to the physical page: [ 43.026166] page:00000000e211f513 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe696 [ 43.026853] memcg:ffff88800c917901 [ 43.027117] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.027524] page_type: 0xffffffff() [ 43.027805] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.028376] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c917901 [ 43.028947] page dumped because: kasan: bad access detected [ 43.029365] [ 43.029501] Memory state around the buggy address: [ 43.029864] ffff88800e696100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.030403] ffff88800e696180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 43.030943] >ffff88800e696200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 43.031474] ^ [ 43.031819] ffff88800e696280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.032358] ffff88800e696300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.032891] ================================================================== [ 43.033591] Disabling lock debugging due to kernel taint [ 44.477442] BUG: Bad rss-counter state mm:00000000d40c39ea type:MM_FILEPAGES val:33 [ 44.478203] BUG: Bad rss-counter state mm:00000000d40c39ea type:MM_ANONPAGES val:22 [ 44.833822] BUG: Bad rss-counter state mm:0000000055365546 type:MM_FILEPAGES val:33 [ 44.835124] BUG: Bad rss-counter state mm:0000000055365546 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30386' (ECDSA) to the list of known hosts. 2023/06/20 00:01:36 fuzzer started 2023/06/20 00:01:37 dialing manager at localhost:44161 2023/06/20 00:01:37 checking machine... 2023/06/20 00:01:37 checking revisions... [ 45.548772] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:01:37 testing simple program... [ 45.591290] cgroup: Unknown subsys name 'net' [ 45.640925] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:01:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009018390 RCX=ffff888009018390 RDX=00000000800d000c RSI=ffff888009018390 RDI=ffff88800844f780 RBP=ffff8880145df7f8 RSP=ffff8880145df760 R8 =00000000800d000b R9 =0000000000000000 R10=ffffea0000240600 R11=00000000000d000c R12=ffffea0000240600 R13=ffff888009018e40 R14=00000000800d000b R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007fe69679e900 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=00007fe695be0a20 CR3=000000000c65c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c7e9dc1fd596e6c700000000000ae988 XMM05=d694fa30a9a8420a00000000001352e0 XMM06=c291bd5c70af25b90000000000134380 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800fd1fdf0 RCX=0000000000000000 RDX=ffff888016579b40 RSI=ffffffff818597f9 RDI=0000000000000007 RBP=0000000000008000 RSP=ffff88800fd1fd88 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000008000 R13=ffff88800fd1fea8 R14=00000000ffffff9c R15=0000000000000000 RIP=ffffffff818597f9 RFL=00000293 [--S-A-C] 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 00007f201330e900 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=00007fff55047000 CR3=000000000ca02000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000