syzkaller login: [ 30.872731] BUG: Bad rss-counter state mm:000000009bd2799a type:MM_FILEPAGES val:33 [ 30.873422] BUG: Bad rss-counter state mm:000000009bd2799a type:MM_ANONPAGES val:22 [ 31.006992] ================================================================== [ 31.007684] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.008333] Read of size 8 at addr ffff88800dffe968 by task sshd/221 [ 31.008893] [ 31.009063] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.009681] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.010336] Call Trace: [ 31.010591] <TASK> [ 31.010984] dump_stack_lvl+0x91/0xf0 [ 31.011378] print_report+0xcc/0x620 [ 31.011723] ? __virt_addr_valid+0x102/0x340 [ 31.012104] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.012578] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.013004] kasan_report+0xbe/0xf0 [ 31.013362] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.013764] vma_interval_tree_remove+0xc75/0xec0 [ 31.014162] vma_prepare+0xc54/0x11a0 [ 31.014512] __split_vma+0x5af/0x950 [ 31.014907] ? __pfx___split_vma+0x10/0x10 [ 31.015259] ? find_held_lock+0x2c/0x110 [ 31.015594] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.015971] ? lock_is_held_type+0x9f/0x120 [ 31.016355] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.016814] ? mtree_range_walk+0x632/0x900 [ 31.017169] ? mas_walk+0x5c7/0x7c0 [ 31.017479] do_vmi_munmap+0x1f1/0x2b0 [ 31.017825] mmap_region+0x1f9/0x2660 [ 31.018163] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.018531] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.019003] ? __pfx_lock_acquire+0x10/0x10 [ 31.019389] ? __pfx_mmap_region+0x10/0x10 [ 31.019770] ? security_mmap_addr+0x7d/0xa0 [ 31.020206] ? get_unmapped_area+0x1f5/0x3f0 [ 31.020617] do_mmap+0x854/0xf00 [ 31.020903] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.021224] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.021583] ksys_mmap_pgoff+0x3af/0x500 [ 31.021888] do_syscall_64+0x3f/0x90 [ 31.022189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.022696] RIP: 0033:0x7f6cef25ed82 [ 31.022998] 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 [ 31.024339] RSP: 002b:00007fffc6c13a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.024919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6cef25ed82 [ 31.025451] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cee698000 [ 31.025986] RBP: 00007f6cee698000 R08: 0000000000000009 R09: 0000000000001000 [ 31.026562] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e7acc2bec0 [ 31.027102] R13: 00007fffc6c13a70 R14: 00007fffc6c13aa0 R15: 00007fffc6c13e00 [ 31.027686] </TASK> [ 31.027886] [ 31.028046] Allocated by task 214: [ 31.028333] kasan_save_stack+0x22/0x50 [ 31.028652] kasan_set_track+0x25/0x30 [ 31.029010] __kasan_slab_alloc+0x59/0x70 [ 31.029360] kmem_cache_alloc+0x16b/0x370 [ 31.029689] vm_area_dup+0x20/0x160 [ 31.029988] __split_vma+0x170/0x950 [ 31.030332] split_vma+0xc6/0x110 [ 31.030638] mprotect_fixup+0x8d2/0xb30 [ 31.030964] do_mprotect_pkey+0x87e/0xd40 [ 31.031297] __x64_sys_mprotect+0x78/0xc0 [ 31.031638] do_syscall_64+0x3f/0x90 [ 31.031937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.032341] [ 31.032477] Freed by task 13: [ 31.032721] kasan_save_stack+0x22/0x50 [ 31.033042] kasan_set_track+0x25/0x30 [ 31.033352] kasan_save_free_info+0x2b/0x50 [ 31.033719] __kasan_slab_free+0x10a/0x190 [ 31.034088] kmem_cache_free+0x10d/0x4d0 [ 31.034458] rcu_core+0x8c8/0x2860 [ 31.034736] __do_softirq+0x1b7/0x7d4 [ 31.035038] [ 31.035180] Last potentially related work creation: [ 31.035583] kasan_save_stack+0x22/0x50 [ 31.035915] __kasan_record_aux_stack+0x8e/0xa0 [ 31.036265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.036710] remove_vma+0x139/0x170 [ 31.036988] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.037348] do_vmi_munmap+0x1f1/0x2b0 [ 31.037638] __vm_munmap+0x138/0x3a0 [ 31.037912] __x64_sys_munmap+0x59/0x80 [ 31.038206] do_syscall_64+0x3f/0x90 [ 31.038524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.038911] [ 31.039044] The buggy address belongs to the object at ffff88800dffe910 [ 31.039044] which belongs to the cache vm_area_struct of size 168 [ 31.039925] The buggy address is located 88 bytes inside of [ 31.039925] freed 168-byte region [ffff88800dffe910, ffff88800dffe9b8) [ 31.040860] [ 31.041008] The buggy address belongs to the physical page: [ 31.041405] page:0000000090f8eef3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdffe [ 31.042074] memcg:ffff888018222401 [ 31.042384] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.042834] page_type: 0xffffffff() [ 31.043208] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.043871] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018222401 [ 31.044503] page dumped because: kasan: bad access detected [ 31.044937] [ 31.045088] Memory state around the buggy address: [ 31.045446] ffff88800dffe800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.045986] ffff88800dffe880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.046689] >ffff88800dffe900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.047234] ^ [ 31.047789] ffff88800dffe980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.048400] ffff88800dffea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.049030] ================================================================== [ 31.049835] Disabling lock debugging due to kernel taint [ 32.488184] BUG: Bad rss-counter state mm:0000000050b50168 type:MM_FILEPAGES val:33 [ 32.488897] BUG: Bad rss-counter state mm:0000000050b50168 type:MM_ANONPAGES val:22 [ 32.855197] BUG: Bad rss-counter state mm:00000000cdbaf715 type:MM_FILEPAGES val:33 [ 32.855887] BUG: Bad rss-counter state mm:00000000cdbaf715 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28975' (ECDSA) to the list of known hosts. 2023/06/21 09:26:07 fuzzer started 2023/06/21 09:26:07 dialing manager at localhost:36067 2023/06/21 09:26:07 checking machine... 2023/06/21 09:26:07 checking revisions... [ 33.440976] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:26:07 testing simple program... [ 33.475317] cgroup: Unknown subsys name 'net' [ 33.530813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:26:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff86607973 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e5792e0 RIP=ffffffff814c0891 RFL=00000206 [-----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 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=00007ffdb7076b08 CR3=000000000974a000 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=2037303a36323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a36323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a58c3e RBX=ffff888016b19800 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8176c2b0 RDI=ffff888016b19800 RBP=ffff888016b19814 RSP=ffff888019fd7b80 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888016b19800 R13=0000000000000000 R14=0000000000000000 R15=ffff8880164d2640 RIP=ffffffff8176c2c9 RFL=00000246 [---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 00007f46638aa900 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=0000562a62806954 CR3=000000000c9e8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000