syzkaller login: [ 31.357318] BUG: Bad rss-counter state mm:0000000070af2726 type:MM_FILEPAGES val:33 [ 31.358520] BUG: Bad rss-counter state mm:0000000070af2726 type:MM_ANONPAGES val:22 [ 31.397087] ================================================================== [ 31.397989] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.398935] Read of size 8 at addr ffff8880146a7058 by task sshd/220 [ 31.399850] [ 31.400067] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.400951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.401956] Call Trace: [ 31.402275] [ 31.402560] dump_stack_lvl+0x91/0xf0 [ 31.403069] print_report+0xcc/0x620 [ 31.403564] ? __virt_addr_valid+0x102/0x340 [ 31.404124] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.404752] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.405394] kasan_report+0xbe/0xf0 [ 31.405878] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.406505] vma_interval_tree_remove+0xc75/0xec0 [ 31.407171] vma_prepare+0xc54/0x11a0 [ 31.407678] __split_vma+0x5af/0x950 [ 31.408188] ? __pfx___split_vma+0x10/0x10 [ 31.408750] ? find_held_lock+0x2c/0x110 [ 31.409296] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.409899] ? lock_is_held_type+0x9f/0x120 [ 31.410466] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.411105] ? mtree_range_walk+0x632/0x900 [ 31.411691] ? mas_walk+0x5c7/0x7c0 [ 31.412207] do_vmi_munmap+0x1f1/0x2b0 [ 31.412735] mmap_region+0x1f9/0x2660 [ 31.413240] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.413777] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.414535] ? __pfx_lock_acquire+0x10/0x10 [ 31.415102] ? __pfx_mmap_region+0x10/0x10 [ 31.415662] ? security_mmap_addr+0x7d/0xa0 [ 31.416220] ? get_unmapped_area+0x1f5/0x3f0 [ 31.416806] do_mmap+0x854/0xf00 [ 31.417265] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.417785] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.418367] ksys_mmap_pgoff+0x3af/0x500 [ 31.418906] do_syscall_64+0x3f/0x90 [ 31.419404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.420084] RIP: 0033:0x7fb6f8c72d82 [ 31.420586] 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 [ 31.422855] RSP: 002b:00007fff35ad0b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.423823] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6f8c72d82 [ 31.424725] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6f80ac000 [ 31.425627] RBP: 00007fb6f80ac000 R08: 0000000000000009 R09: 0000000000001000 [ 31.426519] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605ccf3fb20 [ 31.427415] R13: 00007fff35ad0b50 R14: 00007fff35ad0b80 R15: 00007fff35ad0ee0 [ 31.428339] [ 31.428653] [ 31.428877] Allocated by task 213: [ 31.429334] kasan_save_stack+0x22/0x50 [ 31.429870] kasan_set_track+0x25/0x30 [ 31.430388] __kasan_slab_alloc+0x59/0x70 [ 31.430941] kmem_cache_alloc+0x16b/0x370 [ 31.431499] vm_area_dup+0x20/0x160 [ 31.431983] __split_vma+0x170/0x950 [ 31.432489] split_vma+0xc6/0x110 [ 31.432955] mprotect_fixup+0x8d2/0xb30 [ 31.433486] do_mprotect_pkey+0x87e/0xd40 [ 31.434035] __x64_sys_mprotect+0x78/0xc0 [ 31.434579] do_syscall_64+0x3f/0x90 [ 31.435081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.435767] [ 31.435995] Freed by task 213: [ 31.436421] kasan_save_stack+0x22/0x50 [ 31.436953] kasan_set_track+0x25/0x30 [ 31.437470] kasan_save_free_info+0x2b/0x50 [ 31.438031] __kasan_slab_free+0x10a/0x190 [ 31.438599] kmem_cache_free+0x10d/0x4d0 [ 31.439132] rcu_core+0x8c8/0x2860 [ 31.439599] __do_softirq+0x1b7/0x7d4 [ 31.440097] [ 31.440329] Last potentially related work creation: [ 31.440947] kasan_save_stack+0x22/0x50 [ 31.441478] __kasan_record_aux_stack+0x8e/0xa0 [ 31.442084] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.442763] remove_vma+0x139/0x170 [ 31.443236] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.443815] do_vmi_munmap+0x1f1/0x2b0 [ 31.444344] __vm_munmap+0x138/0x3a0 [ 31.444837] __x64_sys_munmap+0x59/0x80 [ 31.445359] do_syscall_64+0x3f/0x90 [ 31.445855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.446530] [ 31.446754] The buggy address belongs to the object at ffff8880146a7000 [ 31.446754] which belongs to the cache vm_area_struct of size 168 [ 31.448301] The buggy address is located 88 bytes inside of [ 31.448301] freed 168-byte region [ffff8880146a7000, ffff8880146a70a8) [ 31.449803] [ 31.450027] The buggy address belongs to the physical page: [ 31.450718] page:0000000084561362 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146a7 [ 31.451874] memcg:ffff88800da3e401 [ 31.452344] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.453035] page_type: 0xffffffff() [ 31.453505] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.454466] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da3e401 [ 31.455436] page dumped because: kasan: bad access detected [ 31.456131] [ 31.456359] Memory state around the buggy address: [ 31.456979] ffff8880146a6f00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 31.457883] ffff8880146a6f80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 31.458795] >ffff8880146a7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.459711] ^ [ 31.460489] ffff8880146a7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.461392] ffff8880146a7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.462285] ================================================================== [ 31.463307] Disabling lock debugging due to kernel taint [ 34.412140] BUG: Bad rss-counter state mm:00000000ef4e2efd type:MM_FILEPAGES val:33 [ 34.413317] BUG: Bad rss-counter state mm:00000000ef4e2efd type:MM_ANONPAGES val:22 [ 34.824250] BUG: Bad rss-counter state mm:0000000097396550 type:MM_FILEPAGES val:33 [ 34.825427] BUG: Bad rss-counter state mm:0000000097396550 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27990' (ECDSA) to the list of known hosts. 2023/06/20 21:41:41 fuzzer started 2023/06/20 21:41:41 dialing manager at localhost:36067 2023/06/20 21:41:41 checking machine... 2023/06/20 21:41:41 checking revisions... [ 35.441012] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:41:41 testing simple program... [ 35.479192] cgroup: Unknown subsys name 'net' [ 35.509520] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:41:41 Registers: info registers vcpu 0 RAX=00007f568aca0f30 RBX=00007ffc44c10d30 RCX=00007ffc44c10bf8 RDX=0000000000000005 RSI=000000000000002c RDI=00007f568acd1060 RBP=00007ffc44c10e60 RSP=00007ffc44c10bd0 R8 =000055a543d4a640 R9 =00007ffc44c10d60 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=00007f568acba9d8 RFL=00010206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f568a12f900 00000000 00000000 GS =0000 0000000000000000 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=00007f568aca131c CR3=0000000019aac000 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=000000000000fdcc RBX=0000000000000002 RCX=ffffffff813782f7 RDX=000000000000fdcf RSI=0000000000003782 RDI=ffffffff860d2fe2 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff860d2fd0 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff81130868 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 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=00007fd1c5c48910 CR3=000000000ebb0000 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=2030343a31343a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a31343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000