syzkaller login: [ 30.582455] BUG: Bad rss-counter state mm:00000000dd67914e type:MM_FILEPAGES val:33 [ 30.583883] BUG: Bad rss-counter state mm:00000000dd67914e type:MM_ANONPAGES val:22 [ 30.747804] ================================================================== [ 30.748762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.749735] Read of size 8 at addr ffff88800dc31140 by task sshd/219 [ 30.750598] [ 30.750817] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.751708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.752698] Call Trace: [ 30.753022] [ 30.753316] dump_stack_lvl+0x91/0xf0 [ 30.753810] print_report+0xcc/0x620 [ 30.754302] ? __virt_addr_valid+0x102/0x340 [ 30.754865] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755504] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.756122] kasan_report+0xbe/0xf0 [ 30.756601] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757244] vma_interval_tree_remove+0xc75/0xec0 [ 30.757851] vma_prepare+0xc54/0x11a0 [ 30.758348] __split_vma+0x5af/0x950 [ 30.758822] ? __pfx___split_vma+0x10/0x10 [ 30.759392] ? find_held_lock+0x2c/0x110 [ 30.759921] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.760492] ? lock_is_held_type+0x9f/0x120 [ 30.761037] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.761649] ? mtree_range_walk+0x632/0x900 [ 30.762206] ? mas_walk+0x5c7/0x7c0 [ 30.762686] do_vmi_munmap+0x1f1/0x2b0 [ 30.763190] mmap_region+0x1f9/0x2660 [ 30.763685] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.764210] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.764926] ? __pfx_lock_acquire+0x10/0x10 [ 30.765465] ? __pfx_mmap_region+0x10/0x10 [ 30.766006] ? security_mmap_addr+0x7d/0xa0 [ 30.766544] ? get_unmapped_area+0x1f5/0x3f0 [ 30.767127] do_mmap+0x854/0xf00 [ 30.767572] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.768065] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.768646] ksys_mmap_pgoff+0x3af/0x500 [ 30.769177] do_syscall_64+0x3f/0x90 [ 30.769689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770368] RIP: 0033:0x7f608cff0d82 [ 30.770860] 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 [ 30.773149] RSP: 002b:00007ffd774d6b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.774117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f608cff0d82 [ 30.775046] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f608c42a000 [ 30.775946] RBP: 00007f608c42a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.776856] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651f0201d90 [ 30.777756] R13: 00007ffd774d6b60 R14: 00007ffd774d6b90 R15: 00007ffd774d6ef0 [ 30.778661] [ 30.778982] [ 30.779213] Allocated by task 212: [ 30.779672] kasan_save_stack+0x22/0x50 [ 30.780215] kasan_set_track+0x25/0x30 [ 30.780743] __kasan_slab_alloc+0x59/0x70 [ 30.781303] kmem_cache_alloc+0x16b/0x370 [ 30.781847] vm_area_dup+0x20/0x160 [ 30.782335] __split_vma+0x170/0x950 [ 30.782834] split_vma+0xc6/0x110 [ 30.783311] mprotect_fixup+0x8d2/0xb30 [ 30.783849] do_mprotect_pkey+0x87e/0xd40 [ 30.784412] __x64_sys_mprotect+0x78/0xc0 [ 30.784965] do_syscall_64+0x3f/0x90 [ 30.785470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786161] [ 30.786386] Freed by task 212: [ 30.786801] kasan_save_stack+0x22/0x50 [ 30.787356] kasan_set_track+0x25/0x30 [ 30.787882] kasan_save_free_info+0x2b/0x50 [ 30.788438] __kasan_slab_free+0x10a/0x190 [ 30.789009] kmem_cache_free+0x10d/0x4d0 [ 30.789552] rcu_core+0x8c8/0x2860 [ 30.790020] __do_softirq+0x1b7/0x7d4 [ 30.790528] [ 30.790760] Last potentially related work creation: [ 30.791388] kasan_save_stack+0x22/0x50 [ 30.791922] __kasan_record_aux_stack+0x8e/0xa0 [ 30.792538] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.793224] remove_vma+0x139/0x170 [ 30.793698] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.794290] do_vmi_munmap+0x1f1/0x2b0 [ 30.794805] __vm_munmap+0x138/0x3a0 [ 30.795321] __x64_sys_munmap+0x59/0x80 [ 30.795854] do_syscall_64+0x3f/0x90 [ 30.796358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797044] [ 30.797270] The buggy address belongs to the object at ffff88800dc310e8 [ 30.797270] which belongs to the cache vm_area_struct of size 168 [ 30.798846] The buggy address is located 88 bytes inside of [ 30.798846] freed 168-byte region [ffff88800dc310e8, ffff88800dc31190) [ 30.800379] [ 30.800611] The buggy address belongs to the physical page: [ 30.801322] page:0000000066a27766 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc31 [ 30.802489] memcg:ffff88800e183f01 [ 30.802942] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.803655] page_type: 0xffffffff() [ 30.804142] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.805116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e183f01 [ 30.806094] page dumped because: kasan: bad access detected [ 30.806804] [ 30.807044] Memory state around the buggy address: [ 30.807662] ffff88800dc31000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.808578] ffff88800dc31080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.809498] >ffff88800dc31100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.810410] ^ [ 30.811104] ffff88800dc31180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.812015] ffff88800dc31200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.812929] ================================================================== [ 30.813965] Disabling lock debugging due to kernel taint [ 32.915758] BUG: Bad rss-counter state mm:00000000080810a7 type:MM_FILEPAGES val:33 [ 32.916769] BUG: Bad rss-counter state mm:00000000080810a7 type:MM_ANONPAGES val:22 [ 33.409247] BUG: Bad rss-counter state mm:000000009cac5e82 type:MM_FILEPAGES val:33 [ 33.410340] BUG: Bad rss-counter state mm:000000009cac5e82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27170' (ECDSA) to the list of known hosts. 2023/06/21 06:56:55 fuzzer started 2023/06/21 06:56:55 dialing manager at localhost:36067 2023/06/21 06:56:55 checking machine... 2023/06/21 06:56:55 checking revisions... [ 34.137803] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:56:55 testing simple program... [ 34.199576] cgroup: Unknown subsys name 'net' [ 34.261973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:56:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffdf2c07dd8 CR3=0000000005482000 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=00007f410e4f25100000557345aaa790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea0000686300 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888010317701 RSI=ffff888010317738 RDI=ffff888010317738 RBP=ffff8880103173d0 RSP=ffff888010317308 R8 =0000000000000001 R9 =ffff8880103173b8 R10=0000000000038001 R11=0000000000020d0f R12=ffff8880103173d8 R13=ffff8880103173c0 R14=ffff888010317738 R15=ffff888010317378 RIP=ffffffff81131236 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5ea0347900 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=00007f5e9f7c78c0 CR3=000000000c63e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=62968d5502bee8bf00000000000ae988 XMM05=99adde49f3cb674a0000000000132ec8 XMM06=806171799158d9670000000000131cb8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000