syzkaller login: [ 38.841557] BUG: Bad rss-counter state mm:00000000ba03d6d5 type:MM_FILEPAGES val:33 [ 38.842317] BUG: Bad rss-counter state mm:00000000ba03d6d5 type:MM_ANONPAGES val:22 [ 38.945132] ================================================================== [ 38.945815] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.946535] Read of size 8 at addr ffff88800e4a86b0 by task sshd/220 [ 38.947122] [ 38.947286] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.947942] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.948675] Call Trace: [ 38.948917] [ 38.949222] dump_stack_lvl+0x91/0xf0 [ 38.949592] print_report+0xcc/0x620 [ 38.949964] ? __virt_addr_valid+0x102/0x340 [ 38.950384] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.950872] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.951290] kasan_report+0xbe/0xf0 [ 38.951547] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.951876] vma_interval_tree_remove+0xc75/0xec0 [ 38.952202] vma_prepare+0xc54/0x11a0 [ 38.952462] __split_vma+0x5af/0x950 [ 38.952715] ? __pfx___split_vma+0x10/0x10 [ 38.952999] ? find_held_lock+0x2c/0x110 [ 38.953282] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.953582] ? lock_is_held_type+0x9f/0x120 [ 38.953872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.954200] ? mtree_range_walk+0x632/0x900 [ 38.954512] ? mas_walk+0x5c7/0x7c0 [ 38.954782] do_vmi_munmap+0x1f1/0x2b0 [ 38.955071] mmap_region+0x1f9/0x2660 [ 38.955354] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.955640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.956042] ? __pfx_lock_acquire+0x10/0x10 [ 38.956341] ? __pfx_mmap_region+0x10/0x10 [ 38.956642] ? security_mmap_addr+0x7d/0xa0 [ 38.956948] ? get_unmapped_area+0x1f5/0x3f0 [ 38.957255] do_mmap+0x854/0xf00 [ 38.957502] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.957784] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.958099] ksys_mmap_pgoff+0x3af/0x500 [ 38.958390] do_syscall_64+0x3f/0x90 [ 38.958661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.959045] RIP: 0033:0x7ffbbf3aed82 [ 38.959300] 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 [ 38.960511] RSP: 002b:00007ffddb1a8c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.961025] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffbbf3aed82 [ 38.961506] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffbbe7e8000 [ 38.961992] RBP: 00007ffbbe7e8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.962445] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e077396ec0 [ 38.962921] R13: 00007ffddb1a8ca0 R14: 00007ffddb1a8cd0 R15: 00007ffddb1a9030 [ 38.963381] [ 38.963539] [ 38.963654] Allocated by task 213: [ 38.963889] kasan_save_stack+0x22/0x50 [ 38.964165] kasan_set_track+0x25/0x30 [ 38.964429] __kasan_slab_alloc+0x59/0x70 [ 38.964709] kmem_cache_alloc+0x16b/0x370 [ 38.964988] vm_area_dup+0x20/0x160 [ 38.965233] __split_vma+0x170/0x950 [ 38.965482] split_vma+0xc6/0x110 [ 38.965718] mprotect_fixup+0x8d2/0xb30 [ 38.965988] do_mprotect_pkey+0x87e/0xd40 [ 38.966268] __x64_sys_mprotect+0x78/0xc0 [ 38.966548] do_syscall_64+0x3f/0x90 [ 38.966806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.967161] [ 38.967283] Freed by task 204: [ 38.967506] kasan_save_stack+0x22/0x50 [ 38.967788] kasan_set_track+0x25/0x30 [ 38.968069] kasan_save_free_info+0x2b/0x50 [ 38.968367] __kasan_slab_free+0x10a/0x190 [ 38.968671] kmem_cache_free+0x10d/0x4d0 [ 38.968962] rcu_core+0x8c8/0x2860 [ 38.969217] __do_softirq+0x1b7/0x7d4 [ 38.969489] [ 38.969612] Last potentially related work creation: [ 38.969943] kasan_save_stack+0x22/0x50 [ 38.970229] __kasan_record_aux_stack+0x8e/0xa0 [ 38.970553] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.970939] remove_vma+0x139/0x170 [ 38.971193] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.971506] do_vmi_munmap+0x1f1/0x2b0 [ 38.971780] __vm_munmap+0x138/0x3a0 [ 38.972046] __x64_sys_munmap+0x59/0x80 [ 38.972326] do_syscall_64+0x3f/0x90 [ 38.972594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.972954] [ 38.973077] Second to last potentially related work creation: [ 38.973464] kasan_save_stack+0x22/0x50 [ 38.973744] __kasan_record_aux_stack+0x8e/0xa0 [ 38.974069] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.974434] remove_vma+0x139/0x170 [ 38.974688] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.975017] do_vmi_munmap+0x1f1/0x2b0 [ 38.975294] mmap_region+0x1f9/0x2660 [ 38.975561] do_mmap+0x854/0xf00 [ 38.975803] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.976077] ksys_mmap_pgoff+0x3af/0x500 [ 38.976364] do_syscall_64+0x3f/0x90 [ 38.976629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.977002] [ 38.977121] The buggy address belongs to the object at ffff88800e4a8658 [ 38.977121] which belongs to the cache vm_area_struct of size 168 [ 38.977947] The buggy address is located 88 bytes inside of [ 38.977947] freed 168-byte region [ffff88800e4a8658, ffff88800e4a8700) [ 38.978739] [ 38.978865] The buggy address belongs to the physical page: [ 38.979241] page:00000000f2b4b0b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4a8 [ 38.979851] memcg:ffff88800de76401 [ 38.980103] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.980494] page_type: 0xffffffff() [ 38.980751] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bae80 dead000000000003 [ 38.981275] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de76401 [ 38.981788] page dumped because: kasan: bad access detected [ 38.982165] [ 38.982289] Memory state around the buggy address: [ 38.982621] ffff88800e4a8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.983116] ffff88800e4a8600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.983614] >ffff88800e4a8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.984105] ^ [ 38.984438] ffff88800e4a8700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 38.984943] ffff88800e4a8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.985428] ================================================================== [ 38.985976] Disabling lock debugging due to kernel taint [ 40.856583] BUG: Bad rss-counter state mm:00000000b583e043 type:MM_FILEPAGES val:33 [ 40.857688] BUG: Bad rss-counter state mm:00000000b583e043 type:MM_ANONPAGES val:22 [ 41.224479] BUG: Bad rss-counter state mm:00000000de6c8a9d type:MM_FILEPAGES val:33 [ 41.225190] BUG: Bad rss-counter state mm:00000000de6c8a9d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19761' (ECDSA) to the list of known hosts. 2023/06/21 09:19:28 fuzzer started 2023/06/21 09:19:28 dialing manager at localhost:36067 2023/06/21 09:19:28 checking machine... 2023/06/21 09:19:28 checking revisions... [ 41.823818] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:19:28 testing simple program... [ 41.872302] cgroup: Unknown subsys name 'net' [ 41.938221] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:19:28 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001da1f17 RSP=ffff88800ed0f8a8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff88800eb96130 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 00007f9ffb8f1900 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=00007f9ffbea8618 CR3=000000001bf68000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fc6bd7be800 CR3=00000000158de000 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=2038323a39313a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a39313a3930203132 XMM08=00007f50b4016cd00000004900000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000