syzkaller login: [ 33.352056] BUG: Bad rss-counter state mm:00000000833535d1 type:MM_FILEPAGES val:33 [ 33.353270] BUG: Bad rss-counter state mm:00000000833535d1 type:MM_ANONPAGES val:22 [ 33.531407] ================================================================== [ 33.532360] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.533326] Read of size 8 at addr ffff88800fead4e0 by task sshd/221 [ 33.534252] [ 33.534492] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.535368] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.536360] Call Trace: [ 33.536698] [ 33.536988] dump_stack_lvl+0x91/0xf0 [ 33.537490] print_report+0xcc/0x620 [ 33.538000] ? __virt_addr_valid+0x102/0x340 [ 33.538591] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.539218] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.539856] kasan_report+0xbe/0xf0 [ 33.540348] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.540975] vma_interval_tree_remove+0xc75/0xec0 [ 33.541595] vma_prepare+0xc54/0x11a0 [ 33.542092] __split_vma+0x5af/0x950 [ 33.542586] ? __pfx___split_vma+0x10/0x10 [ 33.543124] ? find_held_lock+0x2c/0x110 [ 33.543666] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.544238] ? lock_is_held_type+0x9f/0x120 [ 33.544791] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.545410] ? mtree_range_walk+0x632/0x900 [ 33.545993] ? mas_walk+0x5c7/0x7c0 [ 33.546496] do_vmi_munmap+0x1f1/0x2b0 [ 33.546993] mmap_region+0x1f9/0x2660 [ 33.547494] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.548014] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.548757] ? __pfx_lock_acquire+0x10/0x10 [ 33.549307] ? __pfx_mmap_region+0x10/0x10 [ 33.549852] ? security_mmap_addr+0x7d/0xa0 [ 33.550409] ? get_unmapped_area+0x1f5/0x3f0 [ 33.550968] do_mmap+0x854/0xf00 [ 33.551496] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.552144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.552870] ksys_mmap_pgoff+0x3af/0x500 [ 33.553535] do_syscall_64+0x3f/0x90 [ 33.554176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.554968] RIP: 0033:0x7f990f1add82 [ 33.555519] 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 [ 33.557778] RSP: 002b:00007ffce5730588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.558704] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f990f1add82 [ 33.559567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f990e5e7000 [ 33.560431] RBP: 00007f990e5e7000 R08: 0000000000000009 R09: 0000000000001000 [ 33.561292] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583774f9ec0 [ 33.562177] R13: 00007ffce57305a0 R14: 00007ffce57305d0 R15: 00007ffce5730930 [ 33.563050] [ 33.563359] [ 33.563577] Allocated by task 214: [ 33.564008] kasan_save_stack+0x22/0x50 [ 33.564523] kasan_set_track+0x25/0x30 [ 33.565028] __kasan_slab_alloc+0x59/0x70 [ 33.565579] kmem_cache_alloc+0x16b/0x370 [ 33.566126] vm_area_dup+0x20/0x160 [ 33.566597] __split_vma+0x170/0x950 [ 33.567068] split_vma+0xc6/0x110 [ 33.567522] mprotect_fixup+0x8d2/0xb30 [ 33.568032] do_mprotect_pkey+0x87e/0xd40 [ 33.568570] __x64_sys_mprotect+0x78/0xc0 [ 33.569099] do_syscall_64+0x3f/0x90 [ 33.569595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.570283] [ 33.570502] Freed by task 214: [ 33.570900] kasan_save_stack+0x22/0x50 [ 33.571417] kasan_set_track+0x25/0x30 [ 33.571919] kasan_save_free_info+0x2b/0x50 [ 33.572466] __kasan_slab_free+0x10a/0x190 [ 33.573004] kmem_cache_free+0x10d/0x4d0 [ 33.573538] rcu_core+0x8c8/0x2860 [ 33.574010] __do_softirq+0x1b7/0x7d4 [ 33.574520] [ 33.574740] Last potentially related work creation: [ 33.575351] kasan_save_stack+0x22/0x50 [ 33.575967] __kasan_record_aux_stack+0x8e/0xa0 [ 33.576581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.577235] remove_vma+0x139/0x170 [ 33.577703] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.578467] do_vmi_munmap+0x1f1/0x2b0 [ 33.579064] __vm_munmap+0x138/0x3a0 [ 33.579635] __x64_sys_munmap+0x59/0x80 [ 33.580240] do_syscall_64+0x3f/0x90 [ 33.580816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.581583] [ 33.581878] The buggy address belongs to the object at ffff88800fead488 [ 33.581878] which belongs to the cache vm_area_struct of size 168 [ 33.583683] The buggy address is located 88 bytes inside of [ 33.583683] freed 168-byte region [ffff88800fead488, ffff88800fead530) [ 33.585415] [ 33.585680] The buggy address belongs to the physical page: [ 33.586502] page:00000000f990f598 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfead [ 33.587825] memcg:ffff888015b85e01 [ 33.588334] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.589099] page_type: 0xffffffff() [ 33.589633] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.590736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b85e01 [ 33.591807] page dumped because: kasan: bad access detected [ 33.592593] [ 33.592855] Memory state around the buggy address: [ 33.593542] ffff88800fead380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.594589] ffff88800fead400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.595481] >ffff88800fead480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.596334] ^ [ 33.597091] ffff88800fead500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.597954] ffff88800fead580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.598806] ================================================================== [ 33.599738] Disabling lock debugging due to kernel taint [ 35.647375] BUG: Bad rss-counter state mm:000000006b496462 type:MM_FILEPAGES val:33 [ 35.648386] BUG: Bad rss-counter state mm:000000006b496462 type:MM_ANONPAGES val:22 [ 36.195878] BUG: Bad rss-counter state mm:00000000d0008aa6 type:MM_FILEPAGES val:33 [ 36.196862] BUG: Bad rss-counter state mm:00000000d0008aa6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22454' (ECDSA) to the list of known hosts. 2023/06/19 21:35:16 fuzzer started 2023/06/19 21:35:17 dialing manager at localhost:44161 2023/06/19 21:35:17 checking machine... 2023/06/19 21:35:17 checking revisions... [ 36.821419] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:35:17 testing simple program... [ 36.881709] cgroup: Unknown subsys name 'net' [ 36.926669] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:35:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85d978a8 RCX=ffffffff8118ddc2 RDX=0000000000000001 RSI=ffffffff8609fada RDI=ffffffff85d97888 RBP=ffffffff85d978a8 RSP=ffff88806ce099e0 R8 =ffffffff8609fada R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d978ac R13=ffffffff85d97888 R14=ffffffff85d978a4 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000257 [---ZAPC] 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 00007fa5ab129900 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=00007fff0af6a000 CR3=000000000db66000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f14893a39f0 CR3=00000000158cc000 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=2036313a35333a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a35333a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000