syzkaller login: [ 38.908969] BUG: Bad rss-counter state mm:00000000f498c7d9 type:MM_FILEPAGES val:33 [ 38.909710] BUG: Bad rss-counter state mm:00000000f498c7d9 type:MM_ANONPAGES val:22 [ 38.940729] ================================================================== [ 38.941378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.942018] Read of size 8 at addr ffff88800ef434e0 by task sshd/220 [ 38.942539] [ 38.942694] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.943329] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.944053] Call Trace: [ 38.944285] [ 38.944487] dump_stack_lvl+0x91/0xf0 [ 38.945120] print_report+0xcc/0x620 [ 38.945452] ? __virt_addr_valid+0x102/0x340 [ 38.945846] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.946280] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.946719] kasan_report+0xbe/0xf0 [ 38.947060] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.947488] vma_interval_tree_remove+0xc75/0xec0 [ 38.947928] vma_prepare+0xc54/0x11a0 [ 38.948265] __split_vma+0x5af/0x950 [ 38.948602] ? __pfx___split_vma+0x10/0x10 [ 38.948967] ? find_held_lock+0x2c/0x110 [ 38.949317] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.949704] ? lock_is_held_type+0x9f/0x120 [ 38.950071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.950496] ? mtree_range_walk+0x632/0x900 [ 38.950877] ? mas_walk+0x5c7/0x7c0 [ 38.951204] do_vmi_munmap+0x1f1/0x2b0 [ 38.951546] mmap_region+0x1f9/0x2660 [ 38.951919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.952286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.952792] ? __pfx_lock_acquire+0x10/0x10 [ 38.953158] ? __pfx_mmap_region+0x10/0x10 [ 38.953533] ? security_mmap_addr+0x7d/0xa0 [ 38.953899] ? get_unmapped_area+0x1f5/0x3f0 [ 38.954290] do_mmap+0x854/0xf00 [ 38.954595] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.954923] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.955316] ksys_mmap_pgoff+0x3af/0x500 [ 38.955710] do_syscall_64+0x3f/0x90 [ 38.956050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956498] RIP: 0033:0x7f57a4b64d82 [ 38.956821] 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 [ 38.958321] RSP: 002b:00007ffe05a00d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.958952] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57a4b64d82 [ 38.959544] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57a3f9e000 [ 38.960169] RBP: 00007f57a3f9e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.960701] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560713d25f70 [ 38.961291] R13: 00007ffe05a00d50 R14: 00007ffe05a00d80 R15: 00007ffe05a010e0 [ 38.961881] [ 38.962086] [ 38.962234] Allocated by task 213: [ 38.962535] kasan_save_stack+0x22/0x50 [ 38.962887] kasan_set_track+0x25/0x30 [ 38.963234] __kasan_slab_alloc+0x59/0x70 [ 38.963612] kmem_cache_alloc+0x16b/0x370 [ 38.964006] vm_area_dup+0x20/0x160 [ 38.964324] __split_vma+0x170/0x950 [ 38.964640] split_vma+0xc6/0x110 [ 38.964937] mprotect_fixup+0x8d2/0xb30 [ 38.965287] do_mprotect_pkey+0x87e/0xd40 [ 38.965643] __x64_sys_mprotect+0x78/0xc0 [ 38.966008] do_syscall_64+0x3f/0x90 [ 38.966336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.966786] [ 38.966938] Freed by task 213: [ 38.967219] kasan_save_stack+0x22/0x50 [ 38.967625] kasan_set_track+0x25/0x30 [ 38.967926] kasan_save_free_info+0x2b/0x50 [ 38.968227] __kasan_slab_free+0x10a/0x190 [ 38.968529] kmem_cache_free+0x10d/0x4d0 [ 38.968802] rcu_core+0x8c8/0x2860 [ 38.969042] __do_softirq+0x1b7/0x7d4 [ 38.969306] [ 38.969423] Last potentially related work creation: [ 38.969740] kasan_save_stack+0x22/0x50 [ 38.970011] __kasan_record_aux_stack+0x8e/0xa0 [ 38.970323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.970669] remove_vma+0x139/0x170 [ 38.970914] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.971219] do_vmi_munmap+0x1f1/0x2b0 [ 38.971479] __vm_munmap+0x138/0x3a0 [ 38.971744] __x64_sys_munmap+0x59/0x80 [ 38.972011] do_syscall_64+0x3f/0x90 [ 38.972269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.972615] [ 38.972730] Second to last potentially related work creation: [ 38.973103] kasan_save_stack+0x22/0x50 [ 38.973376] __kasan_record_aux_stack+0x8e/0xa0 [ 38.973689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.974037] remove_vma+0x139/0x170 [ 38.974283] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.974587] do_vmi_munmap+0x1f1/0x2b0 [ 38.974853] mmap_region+0x1f9/0x2660 [ 38.975110] do_mmap+0x854/0xf00 [ 38.975341] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.975706] ksys_mmap_pgoff+0x7d/0x500 [ 38.976042] do_syscall_64+0x3f/0x90 [ 38.976370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.976826] [ 38.976979] The buggy address belongs to the object at ffff88800ef43488 [ 38.976979] which belongs to the cache vm_area_struct of size 168 [ 38.977998] The buggy address is located 88 bytes inside of [ 38.977998] freed 168-byte region [ffff88800ef43488, ffff88800ef43530) [ 38.978998] [ 38.979158] The buggy address belongs to the physical page: [ 38.979665] page:000000002b542ce3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef43 [ 38.980409] memcg:ffff88800c522901 [ 38.980699] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.981187] page_type: 0xffffffff() [ 38.981495] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.982112] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c522901 [ 38.982729] page dumped because: kasan: bad access detected [ 38.983170] [ 38.983318] Memory state around the buggy address: [ 38.983753] ffff88800ef43380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.984340] ffff88800ef43400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.984920] >ffff88800ef43480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.985510] ^ [ 38.986041] ffff88800ef43500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 38.986623] ffff88800ef43580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.987209] ================================================================== [ 38.988299] Disabling lock debugging due to kernel taint [ 40.922932] BUG: Bad rss-counter state mm:00000000cb783687 type:MM_FILEPAGES val:33 [ 40.923705] BUG: Bad rss-counter state mm:00000000cb783687 type:MM_ANONPAGES val:22 [ 41.259189] BUG: Bad rss-counter state mm:000000009e843cb0 type:MM_FILEPAGES val:33 [ 41.259937] BUG: Bad rss-counter state mm:000000009e843cb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60279' (ECDSA) to the list of known hosts. 2023/06/21 08:43:59 fuzzer started 2023/06/21 08:43:59 dialing manager at localhost:36067 2023/06/21 08:43:59 checking machine... 2023/06/21 08:43:59 checking revisions... [ 41.794556] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:43:59 testing simple program... [ 41.828995] cgroup: Unknown subsys name 'net' [ 41.862254] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:43:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83650bf7 RDX=000000000002650b RSI=000000000002650b RDI=ffffffff86582e1c RBP=ffff888016c579b8 RSP=ffff888016c578f0 R8 =0000000000000000 R9 =ffff888016c579a0 R10=0000000000038001 R11=000000000008ad19 R12=ffff888016c579c0 R13=ffff888016c579a8 R14=ffff888016c579a1 R15=ffff888016c57960 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007fc2d1ac3900 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=00007ffdb65d6000 CR3=000000000eaf6000 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=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 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=00007fb5dba29000 CR3=000000000d62e000 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=353fe2902d2c548da4412109a0f3328b XMM02=ec2efd57dc4c00df000000000011ad60 XMM03=daf663cfe831c38a000000000011ae30 XMM04=80ab1aba0d46902500000000000ae988 XMM05=3fe83ca3fa99ce8500000000001337e8 XMM06=4fda316b135da52b0000000000132518 XMM07=e042d86d42eb936e0000000000121a10 XMM08=daf663cfe831c38a000000000011ae30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000