syzkaller login: [ 37.820036] BUG: Bad rss-counter state mm:000000008366b430 type:MM_FILEPAGES val:33 [ 37.821086] BUG: Bad rss-counter state mm:000000008366b430 type:MM_ANONPAGES val:22 [ 37.960558] ================================================================== [ 37.961646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.962777] Read of size 8 at addr ffff8880142143f8 by task sshd/221 [ 37.963838] [ 37.964104] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.965136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.966287] Call Trace: [ 37.966621] [ 37.966914] dump_stack_lvl+0x91/0xf0 [ 37.967414] print_report+0xcc/0x620 [ 37.967893] ? __virt_addr_valid+0x102/0x340 [ 37.968451] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.969072] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.969700] kasan_report+0xbe/0xf0 [ 37.970179] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.970822] vma_interval_tree_remove+0xc75/0xec0 [ 37.971431] vma_prepare+0xc54/0x11a0 [ 37.971926] __split_vma+0x5af/0x950 [ 37.972402] ? __pfx___split_vma+0x10/0x10 [ 37.972936] ? find_held_lock+0x2c/0x110 [ 37.973464] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.974034] ? lock_is_held_type+0x9f/0x120 [ 37.974600] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.975217] ? mtree_range_walk+0x632/0x900 [ 37.975777] ? mas_walk+0x5c7/0x7c0 [ 37.976262] do_vmi_munmap+0x1f1/0x2b0 [ 37.976760] mmap_region+0x1f9/0x2660 [ 37.977252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.977767] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.978512] ? __pfx_lock_acquire+0x10/0x10 [ 37.979057] ? __pfx_mmap_region+0x10/0x10 [ 37.979601] ? security_mmap_addr+0x7d/0xa0 [ 37.980139] ? get_unmapped_area+0x1f5/0x3f0 [ 37.980690] do_mmap+0x854/0xf00 [ 37.981133] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.981637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.982219] ksys_mmap_pgoff+0x3af/0x500 [ 37.982757] do_syscall_64+0x3f/0x90 [ 37.983252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.983898] RIP: 0033:0x7f97a9dddd82 [ 37.984367] 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 [ 37.986549] RSP: 002b:00007fff653da3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.987473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97a9dddd82 [ 37.988331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f97a9217000 [ 37.989180] RBP: 00007f97a9217000 R08: 0000000000000009 R09: 0000000000001000 [ 37.990036] R10: 0000000000000812 R11: 0000000000000206 R12: 000056345969bec0 [ 37.990890] R13: 00007fff653da3f0 R14: 00007fff653da420 R15: 00007fff653da780 [ 37.991751] [ 37.992048] [ 37.992272] Allocated by task 214: [ 37.992713] kasan_save_stack+0x22/0x50 [ 37.993232] kasan_set_track+0x25/0x30 [ 37.993742] __kasan_slab_alloc+0x59/0x70 [ 37.994270] kmem_cache_alloc+0x16b/0x370 [ 37.994815] vm_area_dup+0x20/0x160 [ 37.995281] __split_vma+0x170/0x950 [ 37.995749] split_vma+0xc6/0x110 [ 37.996198] mprotect_fixup+0x8d2/0xb30 [ 37.996708] do_mprotect_pkey+0x87e/0xd40 [ 37.997234] __x64_sys_mprotect+0x78/0xc0 [ 37.997763] do_syscall_64+0x3f/0x90 [ 37.998238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.998912] [ 37.999127] Freed by task 204: [ 37.999523] kasan_save_stack+0x22/0x50 [ 38.000027] kasan_set_track+0x25/0x30 [ 38.000524] kasan_save_free_info+0x2b/0x50 [ 38.001056] __kasan_slab_free+0x10a/0x190 [ 38.001601] kmem_cache_free+0x10d/0x4d0 [ 38.002118] rcu_core+0x8c8/0x2860 [ 38.002586] __do_softirq+0x1b7/0x7d4 [ 38.003067] [ 38.003281] Last potentially related work creation: [ 38.003877] kasan_save_stack+0x22/0x50 [ 38.004448] __kasan_record_aux_stack+0x8e/0xa0 [ 38.005033] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.005693] remove_vma+0x139/0x170 [ 38.006145] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.006725] do_vmi_munmap+0x1f1/0x2b0 [ 38.007227] __vm_munmap+0x138/0x3a0 [ 38.007695] __x64_sys_munmap+0x59/0x80 [ 38.008194] do_syscall_64+0x3f/0x90 [ 38.008673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.009325] [ 38.009546] The buggy address belongs to the object at ffff8880142143a0 [ 38.009546] which belongs to the cache vm_area_struct of size 168 [ 38.011050] The buggy address is located 88 bytes inside of [ 38.011050] freed 168-byte region [ffff8880142143a0, ffff888014214448) [ 38.012475] [ 38.012701] The buggy address belongs to the physical page: [ 38.013363] page:0000000084e46d41 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14214 [ 38.014469] memcg:ffff888018cdd401 [ 38.014907] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.015567] page_type: 0xffffffff() [ 38.016023] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.016952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018cdd401 [ 38.017860] page dumped because: kasan: bad access detected [ 38.018549] [ 38.018768] Memory state around the buggy address: [ 38.019353] ffff888014214280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.020242] ffff888014214300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.021115] >ffff888014214380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.021973] ^ [ 38.022831] ffff888014214400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.023692] ffff888014214480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.024554] ================================================================== [ 38.025465] Disabling lock debugging due to kernel taint [ 40.305638] BUG: Bad rss-counter state mm:00000000887f7b49 type:MM_FILEPAGES val:33 [ 40.306854] BUG: Bad rss-counter state mm:00000000887f7b49 type:MM_ANONPAGES val:22 [ 40.694117] BUG: Bad rss-counter state mm:00000000ffe72f4e type:MM_FILEPAGES val:33 [ 40.695327] BUG: Bad rss-counter state mm:00000000ffe72f4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7119' (ECDSA) to the list of known hosts. 2023/06/19 13:37:06 fuzzer started 2023/06/19 13:37:06 dialing manager at localhost:44161 2023/06/19 13:37:06 checking machine... 2023/06/19 13:37:06 checking revisions... [ 41.406930] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:37:06 testing simple program... [ 41.467594] cgroup: Unknown subsys name 'net' [ 41.540662] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:36:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000558ae069bed0 RCX=0000000000000000 RDX=0000000000000001 RSI=00007ffd7533c9e8 RDI=0000558ae069bfb0 RBP=00007ffd7533c9e0 RSP=00007ffd7533c980 R8 =0000558ae06aa5b7 R9 =00007f80779b5be0 R10=0000000000000100 R11=0000000000000246 R12=00007f8077403900 R13=00007ffd7533c9e8 R14=00007f80773deb22 R15=00007f8077403710 RIP=00007f807786c8ca RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8077403900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd75337000 CR3=0000000009b5e000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=656e20756f7920666920226f6e22206f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f6e2d0f82e0 CR3=000000000e358000 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=2035303a37333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a37333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000