syzkaller login: [ 63.771250] BUG: Bad rss-counter state mm:00000000b23d1b86 type:MM_FILEPAGES val:33 [ 63.772503] BUG: Bad rss-counter state mm:00000000b23d1b86 type:MM_ANONPAGES val:22 [ 63.807807] ================================================================== [ 63.808773] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.809781] Read of size 8 at addr ffff888016ee7140 by task sshd/220 [ 63.810583] [ 63.810807] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.812181] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.813223] Call Trace: [ 63.813564] <TASK> [ 63.813856] dump_stack_lvl+0x91/0xf0 [ 63.814387] print_report+0xcc/0x620 [ 63.814896] ? __virt_addr_valid+0x102/0x340 [ 63.815462] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.816122] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.816765] kasan_report+0xbe/0xf0 [ 63.817284] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.817938] vma_interval_tree_remove+0xc75/0xec0 [ 63.818575] vma_prepare+0xc54/0x11a0 [ 63.819076] __split_vma+0x5af/0x950 [ 63.819569] ? __pfx___split_vma+0x10/0x10 [ 63.820120] ? find_held_lock+0x2c/0x110 [ 63.820668] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.821264] ? lock_is_held_type+0x9f/0x120 [ 63.821829] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.822471] ? mtree_range_walk+0x632/0x900 [ 63.823043] ? mas_walk+0x5c7/0x7c0 [ 63.823536] do_vmi_munmap+0x1f1/0x2b0 [ 63.824048] mmap_region+0x1f9/0x2660 [ 63.824554] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.825092] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.825846] ? __pfx_lock_acquire+0x10/0x10 [ 63.826409] ? __pfx_mmap_region+0x10/0x10 [ 63.826968] ? security_mmap_addr+0x7d/0xa0 [ 63.827534] ? get_unmapped_area+0x1f5/0x3f0 [ 63.828109] do_mmap+0x854/0xf00 [ 63.828563] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.829084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.829701] ksys_mmap_pgoff+0x3af/0x500 [ 63.830229] do_syscall_64+0x3f/0x90 [ 63.830730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.831404] RIP: 0033:0x7f0325072d82 [ 63.831884] 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 [ 63.834124] RSP: 002b:00007ffccfccad28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.835073] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0325072d82 [ 63.835959] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03244ac000 [ 63.836837] RBP: 00007f03244ac000 R08: 0000000000000009 R09: 0000000000001000 [ 63.837721] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558fa36eb20 [ 63.838607] R13: 00007ffccfccad40 R14: 00007ffccfccad70 R15: 00007ffccfccb0d0 [ 63.839497] </TASK> [ 63.839802] [ 63.840028] Allocated by task 213: [ 63.840471] kasan_save_stack+0x22/0x50 [ 63.841000] kasan_set_track+0x25/0x30 [ 63.841522] __kasan_slab_alloc+0x59/0x70 [ 63.842070] kmem_cache_alloc+0x16b/0x370 [ 63.842604] vm_area_dup+0x20/0x160 [ 63.843077] __split_vma+0x170/0x950 [ 63.843565] split_vma+0xc6/0x110 [ 63.844020] mprotect_fixup+0x8d2/0xb30 [ 63.844540] do_mprotect_pkey+0x87e/0xd40 [ 63.845081] __x64_sys_mprotect+0x78/0xc0 [ 63.845623] do_syscall_64+0x3f/0x90 [ 63.846117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.846773] [ 63.846998] Freed by task 213: [ 63.847419] kasan_save_stack+0x22/0x50 [ 63.847942] kasan_set_track+0x25/0x30 [ 63.848448] kasan_save_free_info+0x2b/0x50 [ 63.849003] __kasan_slab_free+0x10a/0x190 [ 63.849554] kmem_cache_free+0x10d/0x4d0 [ 63.850063] rcu_core+0x8c8/0x2860 [ 63.850512] __do_softirq+0x1b7/0x7d4 [ 63.850993] [ 63.851215] Last potentially related work creation: [ 63.851799] kasan_save_stack+0x22/0x50 [ 63.852307] __kasan_record_aux_stack+0x8e/0xa0 [ 63.852894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.853552] remove_vma+0x139/0x170 [ 63.854015] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.854575] do_vmi_munmap+0x1f1/0x2b0 [ 63.855072] __vm_munmap+0x138/0x3a0 [ 63.855555] __x64_sys_munmap+0x59/0x80 [ 63.856053] do_syscall_64+0x3f/0x90 [ 63.856534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.857186] [ 63.857424] The buggy address belongs to the object at ffff888016ee70e8 [ 63.857424] which belongs to the cache vm_area_struct of size 168 [ 63.858916] The buggy address is located 88 bytes inside of [ 63.858916] freed 168-byte region [ffff888016ee70e8, ffff888016ee7190) [ 63.860350] [ 63.860566] The buggy address belongs to the physical page: [ 63.861230] page:00000000fa3fa39e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ee7 [ 63.862347] memcg:ffff888016b05901 [ 63.862772] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.863416] page_type: 0xffffffff() [ 63.863870] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.864783] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b05901 [ 63.865707] page dumped because: kasan: bad access detected [ 63.866382] [ 63.866597] Memory state around the buggy address: [ 63.867182] ffff888016ee7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.868050] ffff888016ee7080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 63.868899] >ffff888016ee7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.869770] ^ [ 63.870416] ffff888016ee7180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 63.871278] ffff888016ee7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 63.872134] ================================================================== [ 63.873281] Disabling lock debugging due to kernel taint [ 66.510149] BUG: Bad rss-counter state mm:0000000058626c96 type:MM_FILEPAGES val:33 [ 66.511300] BUG: Bad rss-counter state mm:0000000058626c96 type:MM_ANONPAGES val:22 [ 66.859154] BUG: Bad rss-counter state mm:0000000086d89590 type:MM_FILEPAGES val:33 [ 66.860183] BUG: Bad rss-counter state mm:0000000086d89590 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58093' (ECDSA) to the list of known hosts. 2023/06/20 06:36:54 fuzzer started 2023/06/20 06:36:54 dialing manager at localhost:44161 2023/06/20 06:36:54 checking machine... 2023/06/20 06:36:54 checking revisions... [ 67.577990] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:36:54 testing simple program... [ 67.634335] cgroup: Unknown subsys name 'net' [ 67.682811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:36:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9c13b6 RSP=ffff88806ce09d98 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b520 R13=ffffffff81378294 R14=ffff88806ce35000 R15=ffff88801a392ac8 RIP=ffffffff8180fd28 RFL=00000256 [---ZAP-] 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 00007fe1392a2900 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=00007fe139859618 CR3=000000001bf5e000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a81e40 RBX=ffff88806cf39500 RCX=1ffff1100d9e7411 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff88806cf3a090 RBP=00000000000b3128 RSP=ffff88806cf09e90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88806cf3a080 R13=00000000fffc6f40 R14=0000000f8f898398 R15=ffff888008d71dd0 RIP=ffffffff8124c32b 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 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=00007f007b45bc70 CR3=000000000e2ca000 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=2033353a36333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a36333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000