syzkaller login: [ 31.474403] BUG: Bad rss-counter state mm:00000000b2f2c878 type:MM_FILEPAGES val:33 [ 31.475620] BUG: Bad rss-counter state mm:00000000b2f2c878 type:MM_ANONPAGES val:22 [ 31.640323] ================================================================== [ 31.641443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.642643] Read of size 8 at addr ffff88800efe54e0 by task sshd/219 [ 31.643415] [ 31.643632] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.644498] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.645510] Call Trace: [ 31.645830] [ 31.646117] dump_stack_lvl+0x91/0xf0 [ 31.646614] print_report+0xcc/0x620 [ 31.647099] ? __virt_addr_valid+0x102/0x340 [ 31.647663] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.648286] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.648909] kasan_report+0xbe/0xf0 [ 31.649394] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.650021] vma_interval_tree_remove+0xc75/0xec0 [ 31.650624] vma_prepare+0xc54/0x11a0 [ 31.651099] __split_vma+0x5af/0x950 [ 31.651576] ? __pfx___split_vma+0x10/0x10 [ 31.652107] ? find_held_lock+0x2c/0x110 [ 31.652625] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.653193] ? lock_is_held_type+0x9f/0x120 [ 31.653754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.654367] ? mtree_range_walk+0x632/0x900 [ 31.654914] ? mas_walk+0x5c7/0x7c0 [ 31.655392] do_vmi_munmap+0x1f1/0x2b0 [ 31.655886] mmap_region+0x1f9/0x2660 [ 31.656369] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.656877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.657608] ? __pfx_lock_acquire+0x10/0x10 [ 31.658146] ? __pfx_mmap_region+0x10/0x10 [ 31.658673] ? security_mmap_addr+0x7d/0xa0 [ 31.659207] ? get_unmapped_area+0x1f5/0x3f0 [ 31.659761] do_mmap+0x854/0xf00 [ 31.660204] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.660698] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.661264] ksys_mmap_pgoff+0x3af/0x500 [ 31.661794] do_syscall_64+0x3f/0x90 [ 31.662275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.662926] RIP: 0033:0x7fbf6fc2bd82 [ 31.663390] 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 [ 31.665524] RSP: 002b:00007ffd7e0e2bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.666424] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf6fc2bd82 [ 31.667269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf6f065000 [ 31.668110] RBP: 00007fbf6f065000 R08: 0000000000000009 R09: 0000000000001000 [ 31.668954] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e071ea5d90 [ 31.669808] R13: 00007ffd7e0e2bf0 R14: 00007ffd7e0e2c20 R15: 00007ffd7e0e2f80 [ 31.670670] [ 31.670958] [ 31.671175] Allocated by task 212: [ 31.671610] kasan_save_stack+0x22/0x50 [ 31.672117] kasan_set_track+0x25/0x30 [ 31.672612] __kasan_slab_alloc+0x59/0x70 [ 31.673137] kmem_cache_alloc+0x16b/0x370 [ 31.673666] vm_area_dup+0x20/0x160 [ 31.674126] __split_vma+0x170/0x950 [ 31.674603] split_vma+0xc6/0x110 [ 31.675047] mprotect_fixup+0x8d2/0xb30 [ 31.675551] do_mprotect_pkey+0x87e/0xd40 [ 31.676075] __x64_sys_mprotect+0x78/0xc0 [ 31.676609] do_syscall_64+0x3f/0x90 [ 31.677088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.677738] [ 31.677955] Freed by task 212: [ 31.678351] kasan_save_stack+0x22/0x50 [ 31.678853] kasan_set_track+0x25/0x30 [ 31.679348] kasan_save_free_info+0x2b/0x50 [ 31.679889] __kasan_slab_free+0x10a/0x190 [ 31.680422] kmem_cache_free+0x10d/0x4d0 [ 31.680927] rcu_core+0x8c8/0x2860 [ 31.681397] __do_softirq+0x1b7/0x7d4 [ 31.681880] [ 31.682094] Last potentially related work creation: [ 31.682678] kasan_save_stack+0x22/0x50 [ 31.683178] __kasan_record_aux_stack+0x8e/0xa0 [ 31.683752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.684393] remove_vma+0x139/0x170 [ 31.684846] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.685421] do_vmi_munmap+0x1f1/0x2b0 [ 31.685908] __vm_munmap+0x138/0x3a0 [ 31.686381] __x64_sys_munmap+0x59/0x80 [ 31.686886] do_syscall_64+0x3f/0x90 [ 31.687356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.687997] [ 31.688214] Second to last potentially related work creation: [ 31.688900] kasan_save_stack+0x22/0x50 [ 31.689416] __kasan_record_aux_stack+0x8e/0xa0 [ 31.689998] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.690639] remove_vma+0x139/0x170 [ 31.691090] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.691648] do_vmi_munmap+0x1f1/0x2b0 [ 31.692140] mmap_region+0x1f9/0x2660 [ 31.692616] do_mmap+0x854/0xf00 [ 31.693045] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.693551] ksys_mmap_pgoff+0x3af/0x500 [ 31.694053] do_syscall_64+0x3f/0x90 [ 31.694528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.695172] [ 31.695394] The buggy address belongs to the object at ffff88800efe5488 [ 31.695394] which belongs to the cache vm_area_struct of size 168 [ 31.696849] The buggy address is located 88 bytes inside of [ 31.696849] freed 168-byte region [ffff88800efe5488, ffff88800efe5530) [ 31.698265] [ 31.698479] The buggy address belongs to the physical page: [ 31.699138] page:00000000cf8a98b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefe5 [ 31.700223] memcg:ffff8880144a4101 [ 31.700652] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.701357] page_type: 0xffffffff() [ 31.701805] raw: 0100000000000200 ffff88800879fc80 ffffea00005129c0 0000000000000003 [ 31.702721] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144a4101 [ 31.703629] page dumped because: kasan: bad access detected [ 31.704289] [ 31.704506] Memory state around the buggy address: [ 31.705078] ffff88800efe5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.705958] ffff88800efe5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.706818] >ffff88800efe5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.707689] ^ [ 31.708451] ffff88800efe5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.709311] ffff88800efe5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.710156] ================================================================== [ 31.711265] Disabling lock debugging due to kernel taint [ 33.655445] BUG: Bad rss-counter state mm:00000000d27d7418 type:MM_FILEPAGES val:33 [ 33.656654] BUG: Bad rss-counter state mm:00000000d27d7418 type:MM_ANONPAGES val:22 [ 34.130586] BUG: Bad rss-counter state mm:0000000082de4e45 type:MM_FILEPAGES val:33 [ 34.131611] BUG: Bad rss-counter state mm:0000000082de4e45 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32787' (ECDSA) to the list of known hosts. 2023/06/19 19:53:01 fuzzer started 2023/06/19 19:53:02 dialing manager at localhost:44161 2023/06/19 19:53:02 checking machine... 2023/06/19 19:53:02 checking revisions... [ 34.863230] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:53:02 testing simple program... [ 34.912656] cgroup: Unknown subsys name 'net' [ 34.969591] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:53:00 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800f35f8d0 RCX=ffffffff8386da8e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880174ad000 RSP=ffff88800f35f838 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888018e48140 R13=00000000fffffff0 R14=ffff8880174ad579 R15=ffff8880174ad600 RIP=ffffffff814c01d0 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 00007f01258b9900 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=00007f0125e70618 CR3=0000000009f68000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007fa0de0c8b10 CR3=000000000f300000 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=00000000000000000000000000000000 XMM01=074b11bc949653bff842297c8c76448f XMM02=000000000011c9b8eff9b2d0a8fce9cb XMM03=000000000011ca882c67c8bc2e329bc3 XMM04=21598557e354692500000000000ae988 XMM05=dfcdbad4f1609c370000000000135360 XMM06=806171799158d96700000000001351e8 XMM07=e042d86d42eb936e0000000000124550 XMM08=55f632e27c45e8c0000000000011ca88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000