syzkaller login: [ 31.245181] BUG: Bad rss-counter state mm:00000000e1bc46f8 type:MM_FILEPAGES val:33 [ 31.246384] BUG: Bad rss-counter state mm:00000000e1bc46f8 type:MM_ANONPAGES val:22 [ 31.410648] ================================================================== [ 31.411746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.412891] Read of size 8 at addr ffff888019966140 by task sshd/219 [ 31.413949] [ 31.414207] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.415301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.416512] Call Trace: [ 31.416906] [ 31.417259] dump_stack_lvl+0x91/0xf0 [ 31.417857] print_report+0xcc/0x620 [ 31.418437] ? __virt_addr_valid+0x102/0x340 [ 31.419117] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.419867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.420632] kasan_report+0xbe/0xf0 [ 31.421215] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.421984] vma_interval_tree_remove+0xc75/0xec0 [ 31.422711] vma_prepare+0xc54/0x11a0 [ 31.423304] __split_vma+0x5af/0x950 [ 31.423887] ? __pfx___split_vma+0x10/0x10 [ 31.424535] ? find_held_lock+0x2c/0x110 [ 31.425171] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.425865] ? lock_is_held_type+0x9f/0x120 [ 31.426533] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.427317] ? mtree_range_walk+0x632/0x900 [ 31.427980] ? mas_walk+0x5c7/0x7c0 [ 31.428553] do_vmi_munmap+0x1f1/0x2b0 [ 31.429143] mmap_region+0x1f9/0x2660 [ 31.429733] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.430354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.431234] ? __pfx_lock_acquire+0x10/0x10 [ 31.431895] ? __pfx_mmap_region+0x10/0x10 [ 31.432552] ? security_mmap_addr+0x7d/0xa0 [ 31.433218] ? get_unmapped_area+0x1f5/0x3f0 [ 31.433886] do_mmap+0x854/0xf00 [ 31.434413] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.435034] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.435732] ksys_mmap_pgoff+0x3af/0x500 [ 31.436364] do_syscall_64+0x3f/0x90 [ 31.436938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.437737] RIP: 0033:0x7f92e2071d82 [ 31.438301] 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 [ 31.440905] RSP: 002b:00007ffe1e3a4778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.442037] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92e2071d82 [ 31.443113] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92e14ab000 [ 31.444148] RBP: 00007f92e14ab000 R08: 0000000000000009 R09: 0000000000001000 [ 31.445190] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9ac071ec0 [ 31.446235] R13: 00007ffe1e3a4790 R14: 00007ffe1e3a47c0 R15: 00007ffe1e3a4b20 [ 31.447191] [ 31.447516] [ 31.447726] Allocated by task 212: [ 31.448135] kasan_save_stack+0x22/0x50 [ 31.448635] kasan_set_track+0x25/0x30 [ 31.449107] __kasan_slab_alloc+0x59/0x70 [ 31.449621] kmem_cache_alloc+0x16b/0x370 [ 31.450113] vm_area_dup+0x20/0x160 [ 31.450572] __split_vma+0x170/0x950 [ 31.451050] split_vma+0xc6/0x110 [ 31.451486] mprotect_fixup+0x8d2/0xb30 [ 31.451969] do_mprotect_pkey+0x87e/0xd40 [ 31.452483] __x64_sys_mprotect+0x78/0xc0 [ 31.452974] do_syscall_64+0x3f/0x90 [ 31.453453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.454059] [ 31.454294] Freed by task 19: [ 31.454680] kasan_save_stack+0x22/0x50 [ 31.455191] kasan_set_track+0x25/0x30 [ 31.455692] kasan_save_free_info+0x2b/0x50 [ 31.456227] __kasan_slab_free+0x10a/0x190 [ 31.456775] kmem_cache_free+0x10d/0x4d0 [ 31.457308] rcu_core+0x8c8/0x2860 [ 31.457758] __do_softirq+0x1b7/0x7d4 [ 31.458227] [ 31.458470] Last potentially related work creation: [ 31.459058] kasan_save_stack+0x22/0x50 [ 31.459564] __kasan_record_aux_stack+0x8e/0xa0 [ 31.460134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.460765] remove_vma+0x139/0x170 [ 31.461206] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.461776] do_vmi_munmap+0x1f1/0x2b0 [ 31.462352] __vm_munmap+0x138/0x3a0 [ 31.462932] __x64_sys_munmap+0x59/0x80 [ 31.463534] do_syscall_64+0x3f/0x90 [ 31.464122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.464892] [ 31.465159] The buggy address belongs to the object at ffff8880199660e8 [ 31.465159] which belongs to the cache vm_area_struct of size 168 [ 31.466965] The buggy address is located 88 bytes inside of [ 31.466965] freed 168-byte region [ffff8880199660e8, ffff888019966190) [ 31.468700] [ 31.468960] The buggy address belongs to the physical page: [ 31.469763] page:0000000094026caa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19966 [ 31.471121] memcg:ffff8880094bcf01 [ 31.471638] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.472422] page_type: 0xffffffff() [ 31.472965] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.474087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094bcf01 [ 31.475214] page dumped because: kasan: bad access detected [ 31.476029] [ 31.476298] Memory state around the buggy address: [ 31.476992] ffff888019966000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.478038] ffff888019966080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.479124] >ffff888019966100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.480166] ^ [ 31.480941] ffff888019966180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.481979] ffff888019966200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.483017] ================================================================== [ 31.484383] Disabling lock debugging due to kernel taint [ 33.426627] BUG: Bad rss-counter state mm:0000000036d5a0e1 type:MM_FILEPAGES val:33 [ 33.427719] BUG: Bad rss-counter state mm:0000000036d5a0e1 type:MM_ANONPAGES val:22 [ 33.916139] BUG: Bad rss-counter state mm:00000000c0e9cd5c type:MM_FILEPAGES val:33 [ 33.917136] BUG: Bad rss-counter state mm:00000000c0e9cd5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61682' (ECDSA) to the list of known hosts. 2023/06/21 01:47:28 fuzzer started 2023/06/21 01:47:29 dialing manager at localhost:36067 2023/06/21 01:47:29 checking machine... 2023/06/21 01:47:29 checking revisions... [ 34.724856] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:47:29 testing simple program... [ 34.785461] cgroup: Unknown subsys name 'net' [ 34.848008] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:47:28 Registers: info registers vcpu 0 RAX=ffffffff8363e064 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016d9f5e8 RSI=ffffffff8363e064 RDI=ffff888016d9f5a0 RBP=ffff888016d9f5f8 RSP=ffff888016d9f530 R8 =0000000000000001 R9 =ffff888016d9f5e0 R10=0000000000038001 R11=000000000008a88c R12=ffff888016d9f668 R13=ffff888016d9f5e8 R14=ffff888019e99b40 R15=ffff888016d9f5a0 RIP=ffffffff81130641 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efdb0057900 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=00007fffa3aa3000 CR3=000000000d798000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fafe300b000 CR3=000000000ccee000 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=2038323a37343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a37343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000