syzkaller login: [ 27.242054] BUG: Bad rss-counter state mm:000000008343a914 type:MM_FILEPAGES val:33 [ 27.243348] BUG: Bad rss-counter state mm:000000008343a914 type:MM_ANONPAGES val:22 [ 27.404384] ================================================================== [ 27.405543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.406891] Read of size 8 at addr ffff888016882140 by task sshd/219 [ 27.407860] [ 27.408134] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.409262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.410361] Call Trace: [ 27.410714] [ 27.411028] dump_stack_lvl+0x91/0xf0 [ 27.411567] print_report+0xcc/0x620 [ 27.412097] ? __virt_addr_valid+0x102/0x340 [ 27.412700] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.413381] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.414067] kasan_report+0xbe/0xf0 [ 27.414616] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.415311] vma_interval_tree_remove+0xc75/0xec0 [ 27.415974] vma_prepare+0xc54/0x11a0 [ 27.416501] __split_vma+0x5af/0x950 [ 27.417030] ? __pfx___split_vma+0x10/0x10 [ 27.417628] ? find_held_lock+0x2c/0x110 [ 27.418218] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.418843] ? lock_is_held_type+0x9f/0x120 [ 27.419449] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.420127] ? mtree_range_walk+0x632/0x900 [ 27.420744] ? mas_walk+0x5c7/0x7c0 [ 27.421267] do_vmi_munmap+0x1f1/0x2b0 [ 27.421816] mmap_region+0x1f9/0x2660 [ 27.422356] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.422923] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.423718] ? __pfx_lock_acquire+0x10/0x10 [ 27.424310] ? __pfx_mmap_region+0x10/0x10 [ 27.424891] ? security_mmap_addr+0x7d/0xa0 [ 27.425476] ? get_unmapped_area+0x1f5/0x3f0 [ 27.426093] do_mmap+0x854/0xf00 [ 27.426601] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.427142] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.427761] ksys_mmap_pgoff+0x3af/0x500 [ 27.428320] do_syscall_64+0x3f/0x90 [ 27.428847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.429557] RIP: 0033:0x7ff29d508d82 [ 27.430063] 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 [ 27.432447] RSP: 002b:00007fff2ac14688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.433457] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff29d508d82 [ 27.434417] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff29c942000 [ 27.435359] RBP: 00007ff29c942000 R08: 0000000000000009 R09: 0000000000001000 [ 27.436306] R10: 0000000000000812 R11: 0000000000000206 R12: 000056142945eec0 [ 27.437248] R13: 00007fff2ac146a0 R14: 00007fff2ac146d0 R15: 00007fff2ac14a30 [ 27.438215] [ 27.438543] [ 27.438777] Allocated by task 212: [ 27.439250] kasan_save_stack+0x22/0x50 [ 27.439804] kasan_set_track+0x25/0x30 [ 27.440346] __kasan_slab_alloc+0x59/0x70 [ 27.440923] kmem_cache_alloc+0x16b/0x370 [ 27.441492] vm_area_dup+0x20/0x160 [ 27.441989] __split_vma+0x170/0x950 [ 27.442530] split_vma+0xc6/0x110 [ 27.443026] mprotect_fixup+0x8d2/0xb30 [ 27.443576] do_mprotect_pkey+0x87e/0xd40 [ 27.444160] __x64_sys_mprotect+0x78/0xc0 [ 27.444736] do_syscall_64+0x3f/0x90 [ 27.445260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.445968] [ 27.446211] Freed by task 203: [ 27.446649] kasan_save_stack+0x22/0x50 [ 27.447212] kasan_set_track+0x25/0x30 [ 27.447765] kasan_save_free_info+0x2b/0x50 [ 27.448358] __kasan_slab_free+0x10a/0x190 [ 27.448949] kmem_cache_free+0x10d/0x4d0 [ 27.449518] rcu_core+0x8c8/0x2860 [ 27.450009] __do_softirq+0x1b7/0x7d4 [ 27.450555] [ 27.450792] Last potentially related work creation: [ 27.451445] kasan_save_stack+0x22/0x50 [ 27.452014] __kasan_record_aux_stack+0x8e/0xa0 [ 27.452643] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.453350] remove_vma+0x139/0x170 [ 27.453854] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.454505] do_vmi_munmap+0x1f1/0x2b0 [ 27.455047] __vm_munmap+0x138/0x3a0 [ 27.455571] __x64_sys_munmap+0x59/0x80 [ 27.456129] do_syscall_64+0x3f/0x90 [ 27.456655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.457364] [ 27.457605] Second to last potentially related work creation: [ 27.458368] kasan_save_stack+0x22/0x50 [ 27.458931] __kasan_record_aux_stack+0x8e/0xa0 [ 27.459556] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.460270] remove_vma+0x139/0x170 [ 27.460763] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.461376] do_vmi_munmap+0x1f1/0x2b0 [ 27.461907] mmap_region+0x1f9/0x2660 [ 27.462443] do_mmap+0x854/0xf00 [ 27.462922] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.463467] ksys_mmap_pgoff+0x3af/0x500 [ 27.464022] do_syscall_64+0x3f/0x90 [ 27.464545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.465255] [ 27.465494] The buggy address belongs to the object at ffff8880168820e8 [ 27.465494] which belongs to the cache vm_area_struct of size 168 [ 27.467179] The buggy address is located 88 bytes inside of [ 27.467179] freed 168-byte region [ffff8880168820e8, ffff888016882190) [ 27.468736] [ 27.468973] The buggy address belongs to the physical page: [ 27.469709] page:000000009a3fba7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16882 [ 27.470940] memcg:ffff88800ebc3301 [ 27.471412] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.472186] page_type: 0xffffffff() [ 27.472685] raw: 0100000000000200 ffff88800879fc80 ffffea0000670b80 dead000000000007 [ 27.473714] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebc3301 [ 27.474728] page dumped because: kasan: bad access detected [ 27.475463] [ 27.475702] Memory state around the buggy address: [ 27.476353] ffff888016882000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.477313] ffff888016882080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 27.478266] >ffff888016882100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.479211] ^ [ 27.479916] ffff888016882180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 27.480874] ffff888016882200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 27.481816] ================================================================== [ 27.482894] Disabling lock debugging due to kernel taint [ 29.527230] BUG: Bad rss-counter state mm:00000000caa4c91b type:MM_FILEPAGES val:33 [ 29.528415] BUG: Bad rss-counter state mm:00000000caa4c91b type:MM_ANONPAGES val:22 [ 29.887879] BUG: Bad rss-counter state mm:00000000716dbaef type:MM_FILEPAGES val:33 [ 29.889127] BUG: Bad rss-counter state mm:00000000716dbaef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56495' (ECDSA) to the list of known hosts. 2023/06/20 10:42:24 fuzzer started 2023/06/20 10:42:24 dialing manager at localhost:44161 2023/06/20 10:42:24 checking machine... 2023/06/20 10:42:24 checking revisions... [ 30.608959] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:42:24 testing simple program... [ 30.657117] cgroup: Unknown subsys name 'net' [ 30.733972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:42:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000200 RCX=ffff888019b01b40 RDX=00000000ffffffff RSI=0000000000000cc0 RDI=ffff8880167e2000 RBP=0000000000000001 RSP=ffff88800ffbfba0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000001 R13=ffff8880167e2000 R14=0000000000000040 R15=ffff8880167e2000 RIP=ffffffff81534324 RFL=00000006 [-----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 00007f559dffe900 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=00007f559e5b60b0 CR3=000000000fafe000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fc220787ae0 CR3=000000000c556000 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=2033323a32343a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a32343a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000