syzkaller login: [ 30.795139] BUG: Bad rss-counter state mm:00000000fc00efdb type:MM_FILEPAGES val:33 [ 30.796174] BUG: Bad rss-counter state mm:00000000fc00efdb type:MM_ANONPAGES val:22 [ 30.961781] ================================================================== [ 30.962684] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.963612] Read of size 8 at addr ffff88800eb86c20 by task sshd/219 [ 30.964380] [ 30.964600] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.965563] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.966531] Call Trace: [ 30.966847] [ 30.967174] dump_stack_lvl+0x91/0xf0 [ 30.967672] print_report+0xcc/0x620 [ 30.968180] ? __virt_addr_valid+0x102/0x340 [ 30.968725] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.969349] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.969969] kasan_report+0xbe/0xf0 [ 30.970441] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.971060] vma_interval_tree_remove+0xc75/0xec0 [ 30.971661] vma_prepare+0xc54/0x11a0 [ 30.972149] __split_vma+0x5af/0x950 [ 30.972618] ? __pfx___split_vma+0x10/0x10 [ 30.973144] ? find_held_lock+0x2c/0x110 [ 30.973662] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.974222] ? lock_is_held_type+0x9f/0x120 [ 30.974774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.975389] ? mtree_range_walk+0x632/0x900 [ 30.975953] ? mas_walk+0x5c7/0x7c0 [ 30.976426] do_vmi_munmap+0x1f1/0x2b0 [ 30.976912] mmap_region+0x1f9/0x2660 [ 30.977395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.977904] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.978614] ? __pfx_lock_acquire+0x10/0x10 [ 30.979139] ? __pfx_mmap_region+0x10/0x10 [ 30.979671] ? security_mmap_addr+0x7d/0xa0 [ 30.980219] ? get_unmapped_area+0x1f5/0x3f0 [ 30.980773] do_mmap+0x854/0xf00 [ 30.981212] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.981705] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.982265] ksys_mmap_pgoff+0x3af/0x500 [ 30.982766] do_syscall_64+0x3f/0x90 [ 30.983247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.983901] RIP: 0033:0x7f80a4fcfd82 [ 30.984356] 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 [ 30.986479] RSP: 002b:00007fff5a277cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.987387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80a4fcfd82 [ 30.988245] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80a4409000 [ 30.989100] RBP: 00007f80a4409000 R08: 0000000000000009 R09: 0000000000001000 [ 30.989944] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585233a0ec0 [ 30.990805] R13: 00007fff5a277d10 R14: 00007fff5a277d40 R15: 00007fff5a2780a0 [ 30.991669] [ 30.991977] [ 30.992194] Allocated by task 212: [ 30.992629] kasan_save_stack+0x22/0x50 [ 30.993136] kasan_set_track+0x25/0x30 [ 30.993627] __kasan_slab_alloc+0x59/0x70 [ 30.994148] kmem_cache_alloc+0x16b/0x370 [ 30.994664] vm_area_dup+0x20/0x160 [ 30.995114] __split_vma+0x170/0x950 [ 30.995578] split_vma+0xc6/0x110 [ 30.996021] mprotect_fixup+0x8d2/0xb30 [ 30.996527] do_mprotect_pkey+0x87e/0xd40 [ 30.997045] __x64_sys_mprotect+0x78/0xc0 [ 30.997562] do_syscall_64+0x3f/0x90 [ 30.998040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.998716] [ 30.998958] Freed by task 202: [ 30.999372] kasan_save_stack+0x22/0x50 [ 30.999917] kasan_set_track+0x25/0x30 [ 31.000413] kasan_save_free_info+0x2b/0x50 [ 31.000960] __kasan_slab_free+0x10a/0x190 [ 31.001502] kmem_cache_free+0x10d/0x4d0 [ 31.002016] rcu_core+0x8c8/0x2860 [ 31.002461] __do_softirq+0x1b7/0x7d4 [ 31.002948] [ 31.003170] Last potentially related work creation: [ 31.003766] kasan_save_stack+0x22/0x50 [ 31.004287] __kasan_record_aux_stack+0x8e/0xa0 [ 31.004868] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.005518] remove_vma+0x139/0x170 [ 31.005983] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.006554] do_vmi_munmap+0x1f1/0x2b0 [ 31.007047] __vm_munmap+0x138/0x3a0 [ 31.007526] __x64_sys_munmap+0x59/0x80 [ 31.008045] do_syscall_64+0x3f/0x90 [ 31.008522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.009166] [ 31.009380] The buggy address belongs to the object at ffff88800eb86bc8 [ 31.009380] which belongs to the cache vm_area_struct of size 168 [ 31.010859] The buggy address is located 88 bytes inside of [ 31.010859] freed 168-byte region [ffff88800eb86bc8, ffff88800eb86c70) [ 31.012285] [ 31.012510] The buggy address belongs to the physical page: [ 31.013161] page:000000001bef6776 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb86 [ 31.014247] memcg:ffff88800fed9601 [ 31.014684] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.015328] page_type: 0xffffffff() [ 31.015781] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.016740] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fed9601 [ 31.017669] page dumped because: kasan: bad access detected [ 31.018338] [ 31.018564] Memory state around the buggy address: [ 31.019150] ffff88800eb86b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.020033] ffff88800eb86b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.020889] >ffff88800eb86c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.021752] ^ [ 31.022285] ffff88800eb86c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.023151] ffff88800eb86d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.024031] ================================================================== [ 31.025097] Disabling lock debugging due to kernel taint [ 33.382870] BUG: Bad rss-counter state mm:00000000506dab8a type:MM_FILEPAGES val:33 [ 33.384037] BUG: Bad rss-counter state mm:00000000506dab8a type:MM_ANONPAGES val:22 [ 33.827348] BUG: Bad rss-counter state mm:0000000058f6ba1f type:MM_FILEPAGES val:33 [ 33.829015] BUG: Bad rss-counter state mm:0000000058f6ba1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9447' (ECDSA) to the list of known hosts. 2023/06/20 13:10:00 fuzzer started 2023/06/20 13:10:00 dialing manager at localhost:36067 2023/06/20 13:10:00 checking machine... 2023/06/20 13:10:00 checking revisions... [ 34.562168] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:10:00 testing simple program... [ 34.605916] cgroup: Unknown subsys name 'net' [ 34.673909] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:10:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800fd69b40 RSI=ffffffff836828d0 RDI=0000000000000001 RBP=ffff8880147fbc80 RSP=ffff888015c0f998 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffffffff83c208fc R13=ffff88800dbf0dc0 R14=ffff888015c0fa88 R15=ffff8880147fbc80 RIP=ffffffff8135b934 RFL=00000293 [--S-A-C] 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 00007f6db775f900 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=00007ff47e897650 CR3=000000000c724000 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=2f72a8a5100baab97247f853edb0a1b5 XMM02=000000000011a608d59e07bde36eea69 XMM03=000000000011a730ec2efd57dc4c00df XMM04=5640df0e8448a49500000000000ae988 XMM05=fa508c5c1cf14b880000000000132bd0 XMM06=806171799158d96700000000001319c0 XMM07=fb795ef6d65770560000000000121c70 XMM08=2c67c8bc2e329bc3000000000011a730 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffdcf2d9478 CR3=000000000fa44000 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=2039353a39303a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a39303a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000