syzkaller login: [ 39.294560] BUG: Bad rss-counter state mm:000000005755df2b type:MM_FILEPAGES val:33 [ 39.295598] BUG: Bad rss-counter state mm:000000005755df2b type:MM_ANONPAGES val:22 [ 39.454363] ================================================================== [ 39.455324] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.456254] Read of size 8 at addr ffff8880198b3798 by task sshd/224 [ 39.457225] [ 39.457443] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.458307] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.459297] Call Trace: [ 39.459615] [ 39.459907] dump_stack_lvl+0x91/0xf0 [ 39.460399] print_report+0xcc/0x620 [ 39.460886] ? __virt_addr_valid+0x102/0x340 [ 39.461430] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.462049] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.462675] kasan_report+0xbe/0xf0 [ 39.463147] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.463769] vma_interval_tree_remove+0xc75/0xec0 [ 39.464376] vma_prepare+0xc54/0x11a0 [ 39.464853] __split_vma+0x5af/0x950 [ 39.465329] ? __pfx___split_vma+0x10/0x10 [ 39.465862] ? find_held_lock+0x2c/0x110 [ 39.466409] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.466972] ? lock_is_held_type+0x9f/0x120 [ 39.467515] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.468127] ? mtree_range_walk+0x632/0x900 [ 39.468673] ? mas_walk+0x5c7/0x7c0 [ 39.469148] do_vmi_munmap+0x1f1/0x2b0 [ 39.469647] mmap_region+0x1f9/0x2660 [ 39.470126] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.470649] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.471364] ? __pfx_lock_acquire+0x10/0x10 [ 39.471899] ? __pfx_mmap_region+0x10/0x10 [ 39.472434] ? security_mmap_addr+0x7d/0xa0 [ 39.472965] ? get_unmapped_area+0x1f5/0x3f0 [ 39.473516] do_mmap+0x854/0xf00 [ 39.473956] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.474455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.475023] ksys_mmap_pgoff+0x3af/0x500 [ 39.475535] do_syscall_64+0x3f/0x90 [ 39.476012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.476654] RIP: 0033:0x7f849d9a7d82 [ 39.477114] 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 [ 39.479271] RSP: 002b:00007ffc853e73f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.480179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f849d9a7d82 [ 39.481026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f849cde1000 [ 39.481872] RBP: 00007f849cde1000 R08: 0000000000000009 R09: 0000000000001000 [ 39.482730] R10: 0000000000000812 R11: 0000000000000206 R12: 000055656b56fd90 [ 39.483588] R13: 00007ffc853e7410 R14: 00007ffc853e7440 R15: 00007ffc853e77a0 [ 39.484451] [ 39.484744] [ 39.484961] Allocated by task 217: [ 39.485389] kasan_save_stack+0x22/0x50 [ 39.485897] kasan_set_track+0x25/0x30 [ 39.486406] __kasan_slab_alloc+0x59/0x70 [ 39.486933] kmem_cache_alloc+0x16b/0x370 [ 39.487453] vm_area_dup+0x20/0x160 [ 39.487902] __split_vma+0x170/0x950 [ 39.488369] split_vma+0xc6/0x110 [ 39.488809] mprotect_fixup+0x8d2/0xb30 [ 39.489312] do_mprotect_pkey+0x87e/0xd40 [ 39.489829] __x64_sys_mprotect+0x78/0xc0 [ 39.490350] do_syscall_64+0x3f/0x90 [ 39.490832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.491475] [ 39.491694] Freed by task 217: [ 39.492084] kasan_save_stack+0x22/0x50 [ 39.492591] kasan_set_track+0x25/0x30 [ 39.493089] kasan_save_free_info+0x2b/0x50 [ 39.493628] __kasan_slab_free+0x10a/0x190 [ 39.494161] kmem_cache_free+0x10d/0x4d0 [ 39.494689] rcu_core+0x8c8/0x2860 [ 39.495145] __do_softirq+0x1b7/0x7d4 [ 39.495624] [ 39.495841] Last potentially related work creation: [ 39.496416] kasan_save_stack+0x22/0x50 [ 39.496919] __kasan_record_aux_stack+0x8e/0xa0 [ 39.497493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.498220] remove_vma+0x139/0x170 [ 39.498687] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.499246] do_vmi_munmap+0x1f1/0x2b0 [ 39.499729] __vm_munmap+0x138/0x3a0 [ 39.500197] __x64_sys_munmap+0x59/0x80 [ 39.500700] do_syscall_64+0x3f/0x90 [ 39.501170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.501818] [ 39.502033] The buggy address belongs to the object at ffff8880198b3740 [ 39.502033] which belongs to the cache vm_area_struct of size 168 [ 39.503525] The buggy address is located 88 bytes inside of [ 39.503525] freed 168-byte region [ffff8880198b3740, ffff8880198b37e8) [ 39.504928] [ 39.505147] The buggy address belongs to the physical page: [ 39.505807] page:00000000e45cd9b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198b3 [ 39.506927] memcg:ffff888019821201 [ 39.507355] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.508003] page_type: 0xffffffff() [ 39.508455] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.509379] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019821201 [ 39.510288] page dumped because: kasan: bad access detected [ 39.510984] [ 39.511200] Memory state around the buggy address: [ 39.511782] ffff8880198b3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.512653] ffff8880198b3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.513512] >ffff8880198b3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.514378] ^ [ 39.514883] ffff8880198b3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.515746] ffff8880198b3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.516609] ================================================================== [ 39.517545] Disabling lock debugging due to kernel taint [ 41.608634] BUG: Bad rss-counter state mm:00000000710f63b5 type:MM_FILEPAGES val:33 [ 41.610312] BUG: Bad rss-counter state mm:00000000710f63b5 type:MM_ANONPAGES val:22 [ 42.156322] BUG: Bad rss-counter state mm:00000000cb8d6e5a type:MM_FILEPAGES val:33 [ 42.157531] BUG: Bad rss-counter state mm:00000000cb8d6e5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4553' (ECDSA) to the list of known hosts. 2023/06/19 13:56:18 fuzzer started 2023/06/19 13:56:18 dialing manager at localhost:44161 2023/06/19 13:56:18 checking machine... 2023/06/19 13:56:18 checking revisions... [ 42.811099] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:56:18 testing simple program... [ 42.850123] cgroup: Unknown subsys name 'net' [ 42.898744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:56:17 Registers: info registers vcpu 0 RAX=1ffff11001d9885f RBX=ffff88800ecc42c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ecc42f8 RBP=ffff888019592680 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888019594000 R14=ffffffff818d9dc6 R15=ffff88800f730e80 RIP=ffffffff81846362 RFL=00000046 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f486dc88900 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=00007ffd75f41000 CR3=0000000016714000 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=0000000000000001 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=00007f132297f6e0 CR3=000000000fd12000 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=2037313a36353a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a36353a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000