syzkaller login: [ 68.903156] BUG: Bad rss-counter state mm:00000000f0f9996a type:MM_FILEPAGES val:33 [ 68.903908] BUG: Bad rss-counter state mm:00000000f0f9996a type:MM_ANONPAGES val:22 [ 69.041103] ================================================================== [ 69.042236] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.043049] Read of size 8 at addr ffff888017730ed8 by task sshd/222 [ 69.043594] [ 69.043750] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.044494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.045195] Call Trace: [ 69.045440] <TASK> [ 69.045644] dump_stack_lvl+0x91/0xf0 [ 69.045991] print_report+0xcc/0x620 [ 69.046351] ? __virt_addr_valid+0x102/0x340 [ 69.046747] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.047195] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.047630] kasan_report+0xbe/0xf0 [ 69.047965] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.048402] vma_interval_tree_remove+0xc75/0xec0 [ 69.048831] vma_prepare+0xc54/0x11a0 [ 69.049168] __split_vma+0x5af/0x950 [ 69.049499] ? __pfx___split_vma+0x10/0x10 [ 69.049874] ? find_held_lock+0x2c/0x110 [ 69.050247] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.050647] ? lock_is_held_type+0x9f/0x120 [ 69.051024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.051456] ? mtree_range_walk+0x632/0x900 [ 69.051844] ? mas_walk+0x5c7/0x7c0 [ 69.052182] do_vmi_munmap+0x1f1/0x2b0 [ 69.052532] mmap_region+0x1f9/0x2660 [ 69.052951] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.053341] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.053849] ? __pfx_lock_acquire+0x10/0x10 [ 69.054242] ? __pfx_mmap_region+0x10/0x10 [ 69.054618] ? security_mmap_addr+0x7d/0xa0 [ 69.054994] ? get_unmapped_area+0x1f5/0x3f0 [ 69.055382] do_mmap+0x854/0xf00 [ 69.055694] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.056042] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.056442] ksys_mmap_pgoff+0x3af/0x500 [ 69.056805] do_syscall_64+0x3f/0x90 [ 69.057144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.057599] RIP: 0033:0x7f257c8d3d82 [ 69.057925] 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 [ 69.059529] RSP: 002b:00007ffd5a219e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.060167] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f257c8d3d82 [ 69.060769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f257bd0d000 [ 69.061367] RBP: 00007f257bd0d000 R08: 0000000000000009 R09: 0000000000001000 [ 69.061970] R10: 0000000000000812 R11: 0000000000000206 R12: 00005584ed549f70 [ 69.062583] R13: 00007ffd5a219e80 R14: 00007ffd5a219eb0 R15: 00007ffd5a21a210 [ 69.063189] </TASK> [ 69.063395] [ 69.063550] Allocated by task 215: [ 69.063860] kasan_save_stack+0x22/0x50 [ 69.064312] kasan_set_track+0x25/0x30 [ 69.064669] __kasan_slab_alloc+0x59/0x70 [ 69.065070] kmem_cache_alloc+0x16b/0x370 [ 69.065434] vm_area_dup+0x20/0x160 [ 69.065756] __split_vma+0x170/0x950 [ 69.066095] split_vma+0xc6/0x110 [ 69.066409] mprotect_fixup+0x8d2/0xb30 [ 69.066764] do_mprotect_pkey+0x87e/0xd40 [ 69.067158] __x64_sys_mprotect+0x78/0xc0 [ 69.067533] do_syscall_64+0x3f/0x90 [ 69.067867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.068319] [ 69.068493] Freed by task 215: [ 69.068779] kasan_save_stack+0x22/0x50 [ 69.069134] kasan_set_track+0x25/0x30 [ 69.069517] kasan_save_free_info+0x2b/0x50 [ 69.069895] __kasan_slab_free+0x10a/0x190 [ 69.070275] kmem_cache_free+0x10d/0x4d0 [ 69.070632] rcu_core+0x8c8/0x2860 [ 69.070952] __do_softirq+0x1b7/0x7d4 [ 69.071314] [ 69.071468] Last potentially related work creation: [ 69.071882] kasan_save_stack+0x22/0x50 [ 69.072271] __kasan_record_aux_stack+0x8e/0xa0 [ 69.072681] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.073132] remove_vma+0x139/0x170 [ 69.073459] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.073873] do_vmi_munmap+0x1f1/0x2b0 [ 69.074236] __vm_munmap+0x138/0x3a0 [ 69.074572] __x64_sys_munmap+0x59/0x80 [ 69.074958] do_syscall_64+0x3f/0x90 [ 69.075294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.075747] [ 69.075901] The buggy address belongs to the object at ffff888017730e80 [ 69.075901] which belongs to the cache vm_area_struct of size 168 [ 69.076951] The buggy address is located 88 bytes inside of [ 69.076951] freed 168-byte region [ffff888017730e80, ffff888017730f28) [ 69.077947] [ 69.078118] The buggy address belongs to the physical page: [ 69.078581] page:000000000b8fa52d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17730 [ 69.079358] memcg:ffff888019cf9301 [ 69.079670] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.080123] page_type: 0xffffffff() [ 69.080444] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 69.081090] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cf9301 [ 69.081747] page dumped because: kasan: bad access detected [ 69.082218] [ 69.082370] Memory state around the buggy address: [ 69.082809] ffff888017730d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.083412] ffff888017730e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 69.084040] >ffff888017730e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.084641] ^ [ 69.085177] ffff888017730f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 69.085785] ffff888017730f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.086436] ================================================================== [ 69.087134] Disabling lock debugging due to kernel taint [ 70.982710] BUG: Bad rss-counter state mm:000000007144d37d type:MM_FILEPAGES val:33 [ 70.983464] BUG: Bad rss-counter state mm:000000007144d37d type:MM_ANONPAGES val:22 [ 71.449774] BUG: Bad rss-counter state mm:0000000037a65a06 type:MM_FILEPAGES val:33 [ 71.450977] BUG: Bad rss-counter state mm:0000000037a65a06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24097' (ECDSA) to the list of known hosts. 2023/06/19 18:09:14 fuzzer started 2023/06/19 18:09:15 dialing manager at localhost:44161 2023/06/19 18:09:15 checking machine... 2023/06/19 18:09:15 checking revisions... [ 72.098978] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:09:15 testing simple program... [ 72.131756] cgroup: Unknown subsys name 'net' [ 72.175201] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:08:37 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff11002c5fecf RSP=ffff8880162ff670 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000287 R13=ffffea0000725f00 R14=ffffffff83677d48 R15=ffff888016a7c600 RIP=ffffffff812e004a 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 00007f5743b4c900 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=00007f5744103618 CR3=000000000c5c4000 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=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=00007f5744101650 CR3=000000000d88a000 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=2034313a39303a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a39303a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000