syzkaller login: [ 30.157582] BUG: Bad rss-counter state mm:000000008de9e7a3 type:MM_FILEPAGES val:33 [ 30.158790] BUG: Bad rss-counter state mm:000000008de9e7a3 type:MM_ANONPAGES val:22 [ 30.195964] ================================================================== [ 30.196602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.197288] Read of size 8 at addr ffff88800d649df0 by task sshd/219 [ 30.197909] [ 30.198027] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.198493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.199020] Call Trace: [ 30.199195] [ 30.199350] dump_stack_lvl+0x91/0xf0 [ 30.199746] print_report+0xcc/0x620 [ 30.200009] ? __virt_addr_valid+0x102/0x340 [ 30.200308] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.200640] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.200972] kasan_report+0xbe/0xf0 [ 30.201234] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.201586] vma_interval_tree_remove+0xc75/0xec0 [ 30.201923] vma_prepare+0xc54/0x11a0 [ 30.202181] __split_vma+0x5af/0x950 [ 30.202437] ? __pfx___split_vma+0x10/0x10 [ 30.202722] ? find_held_lock+0x2c/0x110 [ 30.203005] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.203312] ? lock_is_held_type+0x9f/0x120 [ 30.203607] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.203932] ? mtree_range_walk+0x632/0x900 [ 30.204232] ? mas_walk+0x5c7/0x7c0 [ 30.204489] do_vmi_munmap+0x1f1/0x2b0 [ 30.204756] mmap_region+0x1f9/0x2660 [ 30.205015] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.205298] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.205691] ? __pfx_lock_acquire+0x10/0x10 [ 30.205978] ? __pfx_mmap_region+0x10/0x10 [ 30.206264] ? security_mmap_addr+0x7d/0xa0 [ 30.206552] ? get_unmapped_area+0x1f5/0x3f0 [ 30.206849] do_mmap+0x854/0xf00 [ 30.207090] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.207354] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.207656] ksys_mmap_pgoff+0x3af/0x500 [ 30.207929] do_syscall_64+0x3f/0x90 [ 30.208190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.208542] RIP: 0033:0x7f1431bf4d82 [ 30.208788] 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 [ 30.209948] RSP: 002b:00007ffeead7b678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.210436] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1431bf4d82 [ 30.210893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f143102e000 [ 30.211356] RBP: 00007f143102e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.211813] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c76bfaf70 [ 30.212267] R13: 00007ffeead7b690 R14: 00007ffeead7b6c0 R15: 00007ffeead7ba20 [ 30.212727] [ 30.212886] [ 30.213002] Allocated by task 212: [ 30.213234] kasan_save_stack+0x22/0x50 [ 30.213519] kasan_set_track+0x25/0x30 [ 30.213784] __kasan_slab_alloc+0x59/0x70 [ 30.214069] kmem_cache_alloc+0x16b/0x370 [ 30.214352] vm_area_dup+0x20/0x160 [ 30.214602] __split_vma+0x170/0x950 [ 30.214855] split_vma+0xc6/0x110 [ 30.215092] mprotect_fixup+0x8d2/0xb30 [ 30.215366] do_mprotect_pkey+0x87e/0xd40 [ 30.215649] __x64_sys_mprotect+0x78/0xc0 [ 30.215928] do_syscall_64+0x3f/0x90 [ 30.216184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.216533] [ 30.216649] Freed by task 212: [ 30.216863] kasan_save_stack+0x22/0x50 [ 30.217141] kasan_set_track+0x25/0x30 [ 30.217407] kasan_save_free_info+0x2b/0x50 [ 30.217698] __kasan_slab_free+0x10a/0x190 [ 30.217988] kmem_cache_free+0x10d/0x4d0 [ 30.218261] rcu_core+0x8c8/0x2860 [ 30.218502] __do_softirq+0x1b7/0x7d4 [ 30.218761] [ 30.218877] Last potentially related work creation: [ 30.219196] kasan_save_stack+0x22/0x50 [ 30.219467] __kasan_record_aux_stack+0x8e/0xa0 [ 30.219777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.220131] remove_vma+0x139/0x170 [ 30.220377] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.220676] do_vmi_munmap+0x1f1/0x2b0 [ 30.220940] __vm_munmap+0x138/0x3a0 [ 30.221192] __x64_sys_munmap+0x59/0x80 [ 30.221469] do_syscall_64+0x3f/0x90 [ 30.221728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.222075] [ 30.222190] Second to last potentially related work creation: [ 30.222559] kasan_save_stack+0x22/0x50 [ 30.222829] __kasan_record_aux_stack+0x8e/0xa0 [ 30.223145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.223493] remove_vma+0x139/0x170 [ 30.223736] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.224038] do_vmi_munmap+0x1f1/0x2b0 [ 30.224305] mmap_region+0x1f9/0x2660 [ 30.224563] do_mmap+0x854/0xf00 [ 30.224796] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.225060] ksys_mmap_pgoff+0x3af/0x500 [ 30.225330] do_syscall_64+0x3f/0x90 [ 30.225593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.225940] [ 30.226057] The buggy address belongs to the object at ffff88800d649d98 [ 30.226057] which belongs to the cache vm_area_struct of size 168 [ 30.226850] The buggy address is located 88 bytes inside of [ 30.226850] freed 168-byte region [ffff88800d649d98, ffff88800d649e40) [ 30.227603] [ 30.227719] The buggy address belongs to the physical page: [ 30.228072] page:0000000053987173 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd649 [ 30.228655] memcg:ffff88800cfd9801 [ 30.228885] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.229234] page_type: 0xffffffff() [ 30.229481] raw: 0100000000000200 ffff8880087a0c80 ffffea0000682680 dead000000000006 [ 30.229976] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfd9801 [ 30.230468] page dumped because: kasan: bad access detected [ 30.230827] [ 30.230944] Memory state around the buggy address: [ 30.231259] ffff88800d649c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.231722] ffff88800d649d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.232186] >ffff88800d649d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.232645] ^ [ 30.233080] ffff88800d649e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.233559] ffff88800d649e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.234015] ================================================================== [ 30.234551] Disabling lock debugging due to kernel taint [ 32.118782] BUG: Bad rss-counter state mm:00000000febfa3ca type:MM_FILEPAGES val:33 [ 32.120127] BUG: Bad rss-counter state mm:00000000febfa3ca type:MM_ANONPAGES val:22 [ 32.724725] BUG: Bad rss-counter state mm:00000000cebdb26f type:MM_FILEPAGES val:33 [ 32.726021] BUG: Bad rss-counter state mm:00000000cebdb26f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47389' (ECDSA) to the list of known hosts. 2023/06/20 17:22:26 fuzzer started 2023/06/20 17:22:27 dialing manager at localhost:36067 2023/06/20 17:22:27 checking machine... 2023/06/20 17:22:27 checking revisions... [ 33.330351] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:22:27 testing simple program... [ 33.381871] cgroup: Unknown subsys name 'net' [ 33.420773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:22:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86139744 RDX=1ffff11001cfaf44 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800e7d7a30 RSP=ffff88800e7d7968 R8 =ffffffff86139748 R9 =ffff88800e7d7a18 R10=0000000000038001 R11=0000000000020f03 R12=ffff88800e7d7a38 R13=ffff88800e7d7a20 R14=ffff88800e7d7d48 R15=ffff88800e7d79d8 RIP=ffffffff81131c60 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb8b3d09900 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=00007fff18d97000 CR3=000000000eeda000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e7d7898 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880087b3b58 RBP=0000000000000001 RSP=ffff88800e7d7888 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=0000000000000000 R13=0000000000000000 R14=ffff8880087b3b58 R15=0000000000000000 RIP=ffffffff812d8ea0 RFL=00000086 [--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 00007fb8b3d09900 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=00007f34254d7fe0 CR3=000000000eeda000 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