syzkaller login: [ 40.364371] BUG: Bad rss-counter state mm:00000000f7b898d9 type:MM_FILEPAGES val:33 [ 40.365635] BUG: Bad rss-counter state mm:00000000f7b898d9 type:MM_ANONPAGES val:22 [ 40.462869] ================================================================== [ 40.463900] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.464953] Read of size 8 at addr ffff88800dcb4ed8 by task sshd/220 [ 40.465813] [ 40.466201] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.467015] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.467520] Call Trace: [ 40.467686] [ 40.467835] dump_stack_lvl+0x91/0xf0 [ 40.468091] print_report+0xcc/0x620 [ 40.468357] ? __virt_addr_valid+0x102/0x340 [ 40.468644] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.468959] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.469272] kasan_report+0xbe/0xf0 [ 40.469515] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.469832] vma_interval_tree_remove+0xc75/0xec0 [ 40.470145] vma_prepare+0xc54/0x11a0 [ 40.470390] __split_vma+0x5af/0x950 [ 40.470631] ? __pfx___split_vma+0x10/0x10 [ 40.470903] ? find_held_lock+0x2c/0x110 [ 40.471176] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.471465] ? lock_is_held_type+0x9f/0x120 [ 40.471740] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.472050] ? mtree_range_walk+0x632/0x900 [ 40.472334] ? mas_walk+0x5c7/0x7c0 [ 40.472577] do_vmi_munmap+0x1f1/0x2b0 [ 40.472832] mmap_region+0x1f9/0x2660 [ 40.473083] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.473346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.473709] ? __pfx_lock_acquire+0x10/0x10 [ 40.473983] ? __pfx_mmap_region+0x10/0x10 [ 40.474254] ? security_mmap_addr+0x7d/0xa0 [ 40.474527] ? get_unmapped_area+0x1f5/0x3f0 [ 40.474808] do_mmap+0x854/0xf00 [ 40.475033] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.475298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.475586] ksys_mmap_pgoff+0x3af/0x500 [ 40.475848] do_syscall_64+0x3f/0x90 [ 40.476094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.476426] RIP: 0033:0x7f13bc1dcd82 [ 40.476659] 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 [ 40.477735] RSP: 002b:00007ffea7816f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.478196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13bc1dcd82 [ 40.478626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13bb616000 [ 40.479057] RBP: 00007f13bb616000 R08: 0000000000000009 R09: 0000000000001000 [ 40.479489] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3d4e0cf60 [ 40.479915] R13: 00007ffea7816fa0 R14: 00007ffea7816fd0 R15: 00007ffea7817330 [ 40.480347] [ 40.480496] [ 40.480606] Allocated by task 213: [ 40.480824] kasan_save_stack+0x22/0x50 [ 40.481081] kasan_set_track+0x25/0x30 [ 40.481330] __kasan_slab_alloc+0x59/0x70 [ 40.481596] kmem_cache_alloc+0x16b/0x370 [ 40.481859] vm_area_dup+0x20/0x160 [ 40.482090] __split_vma+0x170/0x950 [ 40.482327] split_vma+0xc6/0x110 [ 40.482549] mprotect_fixup+0x8d2/0xb30 [ 40.482805] do_mprotect_pkey+0x87e/0xd40 [ 40.483070] __x64_sys_mprotect+0x78/0xc0 [ 40.483343] do_syscall_64+0x3f/0x90 [ 40.483585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.483910] [ 40.484021] Freed by task 213: [ 40.484220] kasan_save_stack+0x22/0x50 [ 40.484475] kasan_set_track+0x25/0x30 [ 40.484724] kasan_save_free_info+0x2b/0x50 [ 40.484994] __kasan_slab_free+0x10a/0x190 [ 40.485265] kmem_cache_free+0x10d/0x4d0 [ 40.485521] rcu_core+0x8c8/0x2860 [ 40.485746] __do_softirq+0x1b7/0x7d4 [ 40.485988] [ 40.486098] Last potentially related work creation: [ 40.486391] kasan_save_stack+0x22/0x50 [ 40.486647] __kasan_record_aux_stack+0x8e/0xa0 [ 40.486937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.487268] remove_vma+0x139/0x170 [ 40.487497] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.487779] do_vmi_munmap+0x1f1/0x2b0 [ 40.488026] __vm_munmap+0x138/0x3a0 [ 40.488263] __x64_sys_munmap+0x59/0x80 [ 40.488514] do_syscall_64+0x3f/0x90 [ 40.488754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.489077] [ 40.489187] The buggy address belongs to the object at ffff88800dcb4e80 [ 40.489187] which belongs to the cache vm_area_struct of size 168 [ 40.489921] The buggy address is located 88 bytes inside of [ 40.489921] freed 168-byte region [ffff88800dcb4e80, ffff88800dcb4f28) [ 40.490625] [ 40.490736] The buggy address belongs to the physical page: [ 40.491069] page:00000000ce6e5277 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcb4 [ 40.491621] memcg:ffff8880169bfa01 [ 40.491842] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.492173] page_type: 0xffffffff() [ 40.492401] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.492863] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169bfa01 [ 40.493317] page dumped because: kasan: bad access detected [ 40.493649] [ 40.493760] Memory state around the buggy address: [ 40.494055] ffff88800dcb4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.494484] ffff88800dcb4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 40.494919] >ffff88800dcb4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.495358] ^ [ 40.495723] ffff88800dcb4f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 40.496152] ffff88800dcb4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.496579] ================================================================== [ 40.497035] Disabling lock debugging due to kernel taint [ 42.521907] BUG: Bad rss-counter state mm:00000000df2a0cb8 type:MM_FILEPAGES val:33 [ 42.523235] BUG: Bad rss-counter state mm:00000000df2a0cb8 type:MM_ANONPAGES val:22 [ 42.933166] BUG: Bad rss-counter state mm:00000000d456ba87 type:MM_FILEPAGES val:33 [ 42.934166] BUG: Bad rss-counter state mm:00000000d456ba87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45088' (ECDSA) to the list of known hosts. 2023/06/19 17:36:51 fuzzer started 2023/06/19 17:36:51 dialing manager at localhost:44161 2023/06/19 17:36:51 checking machine... 2023/06/19 17:36:51 checking revisions... [ 43.643321] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:36:51 testing simple program... [ 43.690235] cgroup: Unknown subsys name 'net' [ 43.732719] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:36:41 Registers: info registers vcpu 0 RAX=0100000000000200 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8452fffc RBP=ffff888014207950 RSP=ffff888014207890 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=ffff88801653bbe0 R12=ffff88800844f780 R13=ffff88800d345390 R14=ffff88806ce3de20 R15=ffff88806ce3de00 RIP=ffffffff818071da RFL=00000286 [--S--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 00007f23f9e72900 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=00007f23f92c75d0 CR3=000000000cc3c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1f653705649c2fe900000000000ae988 XMM05=de9c44155a3d1dfe00000000001346c0 XMM06=4fda316b135da52b00000000001334b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81716783 RDX=ffff88800c6a3680 RSI=0000000000000000 RDI=0000000000000005 RBP=000055e75cb9a14c RSP=ffff88800d597dd8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=000055e75cb9a14c R14=0000000000000040 R15=ffff88800d67dc80 RIP=ffffffff814c0245 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe3f6962900 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=000055e75cb9a14c CR3=000000000ca16000 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=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