syzkaller login: [ 37.990012] BUG: Bad rss-counter state mm:00000000dd5f003a type:MM_FILEPAGES val:33 [ 37.991242] BUG: Bad rss-counter state mm:00000000dd5f003a type:MM_ANONPAGES val:22 [ 38.032777] ================================================================== [ 38.033905] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.035168] Read of size 8 at addr ffff88800ec6adf0 by task sshd/220 [ 38.036074] [ 38.036354] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.037391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.038563] Call Trace: [ 38.038985] <TASK> [ 38.039287] dump_stack_lvl+0x91/0xf0 [ 38.039887] print_report+0xcc/0x620 [ 38.040487] ? __virt_addr_valid+0x102/0x340 [ 38.041174] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.041831] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.042619] kasan_report+0xbe/0xf0 [ 38.043133] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.043803] vma_interval_tree_remove+0xc75/0xec0 [ 38.044449] vma_prepare+0xc54/0x11a0 [ 38.044958] __split_vma+0x5af/0x950 [ 38.045462] ? __pfx___split_vma+0x10/0x10 [ 38.046033] ? find_held_lock+0x2c/0x110 [ 38.046594] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.047198] ? lock_is_held_type+0x9f/0x120 [ 38.047786] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.048435] ? mtree_range_walk+0x632/0x900 [ 38.049038] ? mas_walk+0x5c7/0x7c0 [ 38.049558] do_vmi_munmap+0x1f1/0x2b0 [ 38.050087] mmap_region+0x1f9/0x2660 [ 38.050615] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.051168] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.051944] ? __pfx_lock_acquire+0x10/0x10 [ 38.052509] ? __pfx_mmap_region+0x10/0x10 [ 38.053066] ? security_mmap_addr+0x7d/0xa0 [ 38.053624] ? get_unmapped_area+0x1f5/0x3f0 [ 38.054209] do_mmap+0x854/0xf00 [ 38.054676] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.055197] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.055806] ksys_mmap_pgoff+0x3af/0x500 [ 38.056349] do_syscall_64+0x3f/0x90 [ 38.056867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.057562] RIP: 0033:0x7fb2eb1a8d82 [ 38.058048] 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 [ 38.060314] RSP: 002b:00007fff3a372218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.061277] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2eb1a8d82 [ 38.062179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2ea5e2000 [ 38.063077] RBP: 00007fb2ea5e2000 R08: 0000000000000009 R09: 0000000000001000 [ 38.063994] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4c0dae980 [ 38.064896] R13: 00007fff3a372230 R14: 00007fff3a372260 R15: 00007fff3a3725c0 [ 38.065812] </TASK> [ 38.066128] [ 38.066360] Allocated by task 213: [ 38.066818] kasan_save_stack+0x22/0x50 [ 38.067360] kasan_set_track+0x25/0x30 [ 38.067892] __kasan_slab_alloc+0x59/0x70 [ 38.068453] kmem_cache_alloc+0x16b/0x370 [ 38.069001] vm_area_dup+0x20/0x160 [ 38.069484] __split_vma+0x170/0x950 [ 38.069980] split_vma+0xc6/0x110 [ 38.070454] mprotect_fixup+0x8d2/0xb30 [ 38.070987] do_mprotect_pkey+0x87e/0xd40 [ 38.071543] __x64_sys_mprotect+0x78/0xc0 [ 38.072117] do_syscall_64+0x3f/0x90 [ 38.072622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.073307] [ 38.073538] Freed by task 213: [ 38.073956] kasan_save_stack+0x22/0x50 [ 38.074500] kasan_set_track+0x25/0x30 [ 38.075025] kasan_save_free_info+0x2b/0x50 [ 38.075594] __kasan_slab_free+0x10a/0x190 [ 38.076174] kmem_cache_free+0x10d/0x4d0 [ 38.076723] rcu_core+0x8c8/0x2860 [ 38.077196] __do_softirq+0x1b7/0x7d4 [ 38.077705] [ 38.078012] Last potentially related work creation: [ 38.078656] kasan_save_stack+0x22/0x50 [ 38.079193] __kasan_record_aux_stack+0x8e/0xa0 [ 38.079822] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.080505] remove_vma+0x139/0x170 [ 38.080988] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.081582] do_vmi_munmap+0x1f1/0x2b0 [ 38.082098] __vm_munmap+0x138/0x3a0 [ 38.082605] __x64_sys_munmap+0x59/0x80 [ 38.083134] do_syscall_64+0x3f/0x90 [ 38.083638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.084337] [ 38.084572] Second to last potentially related work creation: [ 38.085301] kasan_save_stack+0x22/0x50 [ 38.085844] __kasan_record_aux_stack+0x8e/0xa0 [ 38.086457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.087140] remove_vma+0x139/0x170 [ 38.087624] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.088240] do_vmi_munmap+0x1f1/0x2b0 [ 38.088755] mmap_region+0x1f9/0x2660 [ 38.089269] do_mmap+0x854/0xf00 [ 38.089733] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.090258] ksys_mmap_pgoff+0x3af/0x500 [ 38.090794] do_syscall_64+0x3f/0x90 [ 38.091298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.091989] [ 38.092219] The buggy address belongs to the object at ffff88800ec6ad98 [ 38.092219] which belongs to the cache vm_area_struct of size 168 [ 38.093777] The buggy address is located 88 bytes inside of [ 38.093777] freed 168-byte region [ffff88800ec6ad98, ffff88800ec6ae40) [ 38.095270] [ 38.095501] The buggy address belongs to the physical page: [ 38.096208] page:00000000ce6893c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec6a [ 38.097363] memcg:ffff88800c707101 [ 38.097817] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.098509] page_type: 0xffffffff() [ 38.098993] raw: 0100000000000200 ffff88800879fc80 ffffea00003b22c0 dead000000000008 [ 38.099992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c707101 [ 38.100954] page dumped because: kasan: bad access detected [ 38.101659] [ 38.101891] Memory state around the buggy address: [ 38.102512] ffff88800ec6ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.103425] ffff88800ec6ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.104344] >ffff88800ec6ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.105243] ^ [ 38.106107] ffff88800ec6ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.107016] ffff88800ec6ae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.107930] ================================================================== [ 38.108956] Disabling lock debugging due to kernel taint [ 40.116033] BUG: Bad rss-counter state mm:00000000a09b78f4 type:MM_FILEPAGES val:33 [ 40.117819] BUG: Bad rss-counter state mm:00000000a09b78f4 type:MM_ANONPAGES val:22 [ 40.601513] BUG: Bad rss-counter state mm:00000000f619f0d0 type:MM_FILEPAGES val:33 [ 40.603138] BUG: Bad rss-counter state mm:00000000f619f0d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64566' (ECDSA) to the list of known hosts. 2023/06/20 05:39:06 fuzzer started 2023/06/20 05:39:06 dialing manager at localhost:44161 2023/06/20 05:39:06 checking machine... 2023/06/20 05:39:06 checking revisions... [ 41.255964] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:39:06 testing simple program... [ 41.301156] cgroup: Unknown subsys name 'net' [ 41.378074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:38:58 Registers: info registers vcpu 0 RAX=0000000000020de7 RBX=0000000000000001 RCX=ffffffff8180cd08 RDX=000000000000000e RSI=ffffffff86137736 RDI=ffffffff85dfcb70 RBP=ffff88801c9cf9d0 RSP=ffff88801c9cf900 R8 =ffffffff86137736 R9 =ffff88801c9cf9b8 R10=0000000000038001 R11=0000000000020de7 R12=ffff88801c9cf9d8 R13=ffff88801c9cf9c0 R14=ffff88801c9cf9b9 R15=ffff88801c9cf978 RIP=ffffffff8112fc10 RFL=00000212 [----A--] 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 00007f53d5151900 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=00007f53d5708618 CR3=0000000016562000 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=ffff888008c58400 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=00007ffe4ae516d8 CR3=000000000d7a0000 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=2035303a39333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a39333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000