syzkaller login: [ 35.221113] BUG: Bad rss-counter state mm:000000007bc5ac36 type:MM_FILEPAGES val:33 [ 35.222356] BUG: Bad rss-counter state mm:000000007bc5ac36 type:MM_ANONPAGES val:22 [ 35.401974] ================================================================== [ 35.403165] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.404299] Read of size 8 at addr ffff88800e2c63f8 by task sshd/218 [ 35.405132] [ 35.405375] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.406357] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.407431] Call Trace: [ 35.407784] [ 35.408098] dump_stack_lvl+0x91/0xf0 [ 35.408643] print_report+0xcc/0x620 [ 35.409174] ? __virt_addr_valid+0x102/0x340 [ 35.409772] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.410462] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.411136] kasan_report+0xbe/0xf0 [ 35.411661] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.412337] vma_interval_tree_remove+0xc75/0xec0 [ 35.412996] vma_prepare+0xc54/0x11a0 [ 35.413523] __split_vma+0x5af/0x950 [ 35.414044] ? __pfx___split_vma+0x10/0x10 [ 35.414646] ? find_held_lock+0x2c/0x110 [ 35.415211] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.415839] ? lock_is_held_type+0x9f/0x120 [ 35.416431] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.417084] ? mtree_range_walk+0x632/0x900 [ 35.417685] ? mas_walk+0x5c7/0x7c0 [ 35.418220] do_vmi_munmap+0x1f1/0x2b0 [ 35.418771] mmap_region+0x1f9/0x2660 [ 35.419307] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.419842] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.420584] ? __pfx_lock_acquire+0x10/0x10 [ 35.421126] ? __pfx_mmap_region+0x10/0x10 [ 35.421671] ? security_mmap_addr+0x7d/0xa0 [ 35.422235] ? get_unmapped_area+0x1f5/0x3f0 [ 35.422803] do_mmap+0x854/0xf00 [ 35.423255] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.423765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.424348] ksys_mmap_pgoff+0x3af/0x500 [ 35.424877] do_syscall_64+0x3f/0x90 [ 35.425369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.426041] RIP: 0033:0x7f1e94de7d82 [ 35.426537] 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 [ 35.428739] RSP: 002b:00007fffeda2e2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.429685] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e94de7d82 [ 35.430579] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e94221000 [ 35.431459] RBP: 00007f1e94221000 R08: 0000000000000009 R09: 0000000000001000 [ 35.432336] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec52eeed90 [ 35.433219] R13: 00007fffeda2e2c0 R14: 00007fffeda2e2f0 R15: 00007fffeda2e650 [ 35.434111] [ 35.434460] [ 35.434682] Allocated by task 211: [ 35.435117] kasan_save_stack+0x22/0x50 [ 35.435652] kasan_set_track+0x25/0x30 [ 35.436160] __kasan_slab_alloc+0x59/0x70 [ 35.436716] kmem_cache_alloc+0x16b/0x370 [ 35.437250] vm_area_dup+0x20/0x160 [ 35.437727] __split_vma+0x170/0x950 [ 35.438223] split_vma+0xc6/0x110 [ 35.438686] mprotect_fixup+0x8d2/0xb30 [ 35.439212] do_mprotect_pkey+0x87e/0xd40 [ 35.439757] __x64_sys_mprotect+0x78/0xc0 [ 35.440304] do_syscall_64+0x3f/0x90 [ 35.440801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.441463] [ 35.441687] Freed by task 211: [ 35.442091] kasan_save_stack+0x22/0x50 [ 35.442658] kasan_set_track+0x25/0x30 [ 35.443173] kasan_save_free_info+0x2b/0x50 [ 35.443731] __kasan_slab_free+0x10a/0x190 [ 35.444283] kmem_cache_free+0x10d/0x4d0 [ 35.444812] rcu_core+0x8c8/0x2860 [ 35.445274] __do_softirq+0x1b7/0x7d4 [ 35.445768] [ 35.445995] Last potentially related work creation: [ 35.446621] kasan_save_stack+0x22/0x50 [ 35.447139] __kasan_record_aux_stack+0x8e/0xa0 [ 35.447742] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.448416] remove_vma+0x139/0x170 [ 35.448897] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.449463] do_vmi_munmap+0x1f1/0x2b0 [ 35.449965] __vm_munmap+0x138/0x3a0 [ 35.450470] __x64_sys_munmap+0x59/0x80 [ 35.450981] do_syscall_64+0x3f/0x90 [ 35.451472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.452131] [ 35.452353] The buggy address belongs to the object at ffff88800e2c63a0 [ 35.452353] which belongs to the cache vm_area_struct of size 168 [ 35.453872] The buggy address is located 88 bytes inside of [ 35.453872] freed 168-byte region [ffff88800e2c63a0, ffff88800e2c6448) [ 35.455350] [ 35.455571] The buggy address belongs to the physical page: [ 35.456250] page:00000000937fc7fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2c6 [ 35.457362] memcg:ffff888014582201 [ 35.457804] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.458493] page_type: 0xffffffff() [ 35.458954] raw: 0100000000000200 ffff8880087a0c80 ffffea000037f1c0 dead000000000004 [ 35.459886] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014582201 [ 35.460813] page dumped because: kasan: bad access detected [ 35.461484] [ 35.461704] Memory state around the buggy address: [ 35.462323] ffff88800e2c6280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.463197] ffff88800e2c6300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.464070] >ffff88800e2c6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.464935] ^ [ 35.465799] ffff88800e2c6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.466698] ffff88800e2c6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.467564] ================================================================== [ 35.468624] Disabling lock debugging due to kernel taint [ 37.054008] BUG: Bad rss-counter state mm:0000000043a0b5d4 type:MM_FILEPAGES val:33 [ 37.054724] BUG: Bad rss-counter state mm:0000000043a0b5d4 type:MM_ANONPAGES val:22 [ 37.476638] BUG: Bad rss-counter state mm:00000000ddd30ce8 type:MM_FILEPAGES val:33 [ 37.477428] BUG: Bad rss-counter state mm:00000000ddd30ce8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42246' (ECDSA) to the list of known hosts. 2023/06/21 00:16:32 fuzzer started 2023/06/21 00:16:32 dialing manager at localhost:36067 2023/06/21 00:16:32 checking machine... 2023/06/21 00:16:32 checking revisions... [ 38.167955] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:16:32 testing simple program... [ 38.209920] cgroup: Unknown subsys name 'net' [ 38.262710] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:16:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ff2d1c3fac0 CR3=000000000c65c000 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=6b05712b86d0ee882843216c7baaa7ff XMM02=ec2efd57dc4c00df000000000011ac68 XMM03=5e3a802b497bdce7000000000011ad38 XMM04=434575d22422f45300000000000ae988 XMM05=dfcdbad4f1609c3700000000001315e8 XMM06=6aefbb7316892b7c00000000001307c0 XMM07=e042d86d42eb936e0000000000121d00 XMM08=5e3a802b497bdce7000000000011ad38 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86098097 RBX=0000000000000002 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130abf 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 00007f38a2340900 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=00007fff703ce000 CR3=000000000df76000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000