syzkaller login: [ 38.728819] BUG: Bad rss-counter state mm:000000000596fcd7 type:MM_FILEPAGES val:33 [ 38.729826] BUG: Bad rss-counter state mm:000000000596fcd7 type:MM_ANONPAGES val:22 [ 38.897665] ================================================================== [ 38.898798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.899785] Read of size 8 at addr ffff88800d858a50 by task sshd/219 [ 38.900721] [ 38.900954] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.901811] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.902823] Call Trace: [ 38.903141] [ 38.903425] dump_stack_lvl+0x91/0xf0 [ 38.903921] print_report+0xcc/0x620 [ 38.904411] ? __virt_addr_valid+0x102/0x340 [ 38.904965] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.905596] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906236] kasan_report+0xbe/0xf0 [ 38.906710] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907341] vma_interval_tree_remove+0xc75/0xec0 [ 38.907953] vma_prepare+0xc54/0x11a0 [ 38.908435] __split_vma+0x5af/0x950 [ 38.908916] ? __pfx___split_vma+0x10/0x10 [ 38.909450] ? find_held_lock+0x2c/0x110 [ 38.909975] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.910549] ? lock_is_held_type+0x9f/0x120 [ 38.911101] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.911711] ? mtree_range_walk+0x632/0x900 [ 38.912274] ? mas_walk+0x5c7/0x7c0 [ 38.912762] do_vmi_munmap+0x1f1/0x2b0 [ 38.913264] mmap_region+0x1f9/0x2660 [ 38.913749] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.914284] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.915009] ? __pfx_lock_acquire+0x10/0x10 [ 38.915553] ? __pfx_mmap_region+0x10/0x10 [ 38.916091] ? security_mmap_addr+0x7d/0xa0 [ 38.916627] ? get_unmapped_area+0x1f5/0x3f0 [ 38.917174] do_mmap+0x854/0xf00 [ 38.917612] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.918129] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.918701] ksys_mmap_pgoff+0x3af/0x500 [ 38.919215] do_syscall_64+0x3f/0x90 [ 38.919695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920356] RIP: 0033:0x7f9e23000d82 [ 38.920837] 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 [ 38.922969] RSP: 002b:00007ffcfb4a8598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.923879] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e23000d82 [ 38.924722] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e2243a000 [ 38.925581] RBP: 00007f9e2243a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.926454] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560578c65f70 [ 38.927301] R13: 00007ffcfb4a85b0 R14: 00007ffcfb4a85e0 R15: 00007ffcfb4a8940 [ 38.928161] [ 38.928454] [ 38.928671] Allocated by task 212: [ 38.929113] kasan_save_stack+0x22/0x50 [ 38.929619] kasan_set_track+0x25/0x30 [ 38.930142] __kasan_slab_alloc+0x59/0x70 [ 38.930683] kmem_cache_alloc+0x16b/0x370 [ 38.931209] vm_area_dup+0x20/0x160 [ 38.931666] __split_vma+0x170/0x950 [ 38.932150] split_vma+0xc6/0x110 [ 38.932597] mprotect_fixup+0x8d2/0xb30 [ 38.933107] do_mprotect_pkey+0x87e/0xd40 [ 38.933628] __x64_sys_mprotect+0x78/0xc0 [ 38.934153] do_syscall_64+0x3f/0x90 [ 38.934629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935276] [ 38.935488] Freed by task 212: [ 38.935886] kasan_save_stack+0x22/0x50 [ 38.936400] kasan_set_track+0x25/0x30 [ 38.936896] kasan_save_free_info+0x2b/0x50 [ 38.937432] __kasan_slab_free+0x10a/0x190 [ 38.937969] kmem_cache_free+0x10d/0x4d0 [ 38.938506] rcu_core+0x8c8/0x2860 [ 38.938945] __do_softirq+0x1b7/0x7d4 [ 38.939435] [ 38.939669] Last potentially related work creation: [ 38.940285] kasan_save_stack+0x22/0x50 [ 38.940808] __kasan_record_aux_stack+0x8e/0xa0 [ 38.941411] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.942079] remove_vma+0x139/0x170 [ 38.942547] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.943120] do_vmi_munmap+0x1f1/0x2b0 [ 38.943614] __vm_munmap+0x138/0x3a0 [ 38.944098] __x64_sys_munmap+0x59/0x80 [ 38.944600] do_syscall_64+0x3f/0x90 [ 38.945084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945752] [ 38.945971] Second to last potentially related work creation: [ 38.946670] kasan_save_stack+0x22/0x50 [ 38.947182] __kasan_record_aux_stack+0x8e/0xa0 [ 38.947764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.948407] remove_vma+0x139/0x170 [ 38.948869] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.949438] do_vmi_munmap+0x1f1/0x2b0 [ 38.949929] mmap_region+0x1f9/0x2660 [ 38.950428] do_mmap+0x854/0xf00 [ 38.950863] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.951355] ksys_mmap_pgoff+0x3af/0x500 [ 38.951861] do_syscall_64+0x3f/0x90 [ 38.952339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.952981] [ 38.953199] The buggy address belongs to the object at ffff88800d8589f8 [ 38.953199] which belongs to the cache vm_area_struct of size 168 [ 38.954667] The buggy address is located 88 bytes inside of [ 38.954667] freed 168-byte region [ffff88800d8589f8, ffff88800d858aa0) [ 38.956053] [ 38.956272] The buggy address belongs to the physical page: [ 38.956935] page:00000000d5bdbc73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd858 [ 38.958026] memcg:ffff88800e20fa01 [ 38.958464] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.959165] page_type: 0xffffffff() [ 38.959614] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.960531] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e20fa01 [ 38.961447] page dumped because: kasan: bad access detected [ 38.962129] [ 38.962347] Memory state around the buggy address: [ 38.962922] ffff88800d858900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.963775] ffff88800d858980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.964621] >ffff88800d858a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.965474] ^ [ 38.966193] ffff88800d858a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.967053] ffff88800d858b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.967916] ================================================================== [ 38.969087] Disabling lock debugging due to kernel taint [ 41.202415] BUG: Bad rss-counter state mm:00000000da1e15e9 type:MM_FILEPAGES val:33 [ 41.203470] BUG: Bad rss-counter state mm:00000000da1e15e9 type:MM_ANONPAGES val:22 [ 41.670361] BUG: Bad rss-counter state mm:00000000d33122bb type:MM_FILEPAGES val:33 [ 41.671372] BUG: Bad rss-counter state mm:00000000d33122bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37306' (ECDSA) to the list of known hosts. 2023/06/20 18:13:22 fuzzer started 2023/06/20 18:13:22 dialing manager at localhost:36067 2023/06/20 18:13:22 checking machine... 2023/06/20 18:13:22 checking revisions... [ 42.410423] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:13:22 testing simple program... [ 42.469515] cgroup: Unknown subsys name 'net' [ 42.513437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:13:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880198f04c0 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806ce09d78 RBP=1ffff1100d9c13ab RSP=ffff88806ce09d50 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880198f04c8 R13=ffff8880198f04d0 R14=ffffffff813782f8 R15=ffff88800e592300 RIP=ffffffff812e0146 RFL=00000046 [---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 00007fcde0485900 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=00007fcde0a3c618 CR3=000000001a38a000 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=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=00007f7ee4efb000 CR3=00000000098ea000 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=5ed38dfae453289ace43f4d52c03df0d XMM02=000000000011ac30ec2efd57dc4c00df XMM03=00000000001219d8b702f133f6efdef1 XMM04=f1895d1deeb7456600000000000ae988 XMM05=dfcdbad4f1609c3700000000001328e0 XMM06=ad74bff0fbc654020000000000131ab8 XMM07=e042d86d42eb936e0000000000121c58 XMM08=b702f133f6efdef1000000000011ac90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000