syzkaller login: [ 30.833461] BUG: Bad rss-counter state mm:0000000094445468 type:MM_FILEPAGES val:33 [ 30.835922] BUG: Bad rss-counter state mm:0000000094445468 type:MM_ANONPAGES val:22 [ 30.970810] ================================================================== [ 30.971885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.973162] Read of size 8 at addr ffff88800f6cbc20 by task sshd/221 [ 30.974049] [ 30.974266] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.975148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.976138] Call Trace: [ 30.976454] [ 30.976731] dump_stack_lvl+0x91/0xf0 [ 30.977236] print_report+0xcc/0x620 [ 30.977729] ? __virt_addr_valid+0x102/0x340 [ 30.978293] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.978942] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.979579] kasan_report+0xbe/0xf0 [ 30.980068] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980693] vma_interval_tree_remove+0xc75/0xec0 [ 30.981307] vma_prepare+0xc54/0x11a0 [ 30.981785] __split_vma+0x5af/0x950 [ 30.982274] ? __pfx___split_vma+0x10/0x10 [ 30.982819] ? find_held_lock+0x2c/0x110 [ 30.983361] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.983926] ? lock_is_held_type+0x9f/0x120 [ 30.984485] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.985115] ? mtree_range_walk+0x632/0x900 [ 30.985669] ? mas_walk+0x5c7/0x7c0 [ 30.986159] do_vmi_munmap+0x1f1/0x2b0 [ 30.986677] mmap_region+0x1f9/0x2660 [ 30.987170] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.987684] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.988410] ? __pfx_lock_acquire+0x10/0x10 [ 30.988949] ? __pfx_mmap_region+0x10/0x10 [ 30.989496] ? security_mmap_addr+0x7d/0xa0 [ 30.990040] ? get_unmapped_area+0x1f5/0x3f0 [ 30.990616] do_mmap+0x854/0xf00 [ 30.991068] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.991559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.992148] ksys_mmap_pgoff+0x3af/0x500 [ 30.992652] do_syscall_64+0x3f/0x90 [ 30.993143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.993794] RIP: 0033:0x7fd9c242ad82 [ 30.994256] 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 [ 30.996415] RSP: 002b:00007ffe5488a098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.997339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9c242ad82 [ 30.998201] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9c1864000 [ 30.999132] RBP: 00007fd9c1864000 R08: 0000000000000009 R09: 0000000000001000 [ 30.999995] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7c1448ec0 [ 31.000833] R13: 00007ffe5488a0b0 R14: 00007ffe5488a0e0 R15: 00007ffe5488a440 [ 31.001718] [ 31.002033] [ 31.002245] Allocated by task 214: [ 31.002683] kasan_save_stack+0x22/0x50 [ 31.003196] kasan_set_track+0x25/0x30 [ 31.003688] __kasan_slab_alloc+0x59/0x70 [ 31.004232] kmem_cache_alloc+0x16b/0x370 [ 31.004752] vm_area_dup+0x20/0x160 [ 31.005202] __split_vma+0x170/0x950 [ 31.005657] split_vma+0xc6/0x110 [ 31.006119] mprotect_fixup+0x8d2/0xb30 [ 31.006634] do_mprotect_pkey+0x87e/0xd40 [ 31.007167] __x64_sys_mprotect+0x78/0xc0 [ 31.007693] do_syscall_64+0x3f/0x90 [ 31.008193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.008838] [ 31.009071] Freed by task 214: [ 31.009461] kasan_save_stack+0x22/0x50 [ 31.009978] kasan_set_track+0x25/0x30 [ 31.010504] kasan_save_free_info+0x2b/0x50 [ 31.011045] __kasan_slab_free+0x10a/0x190 [ 31.011582] kmem_cache_free+0x10d/0x4d0 [ 31.012115] rcu_core+0x8c8/0x2860 [ 31.012568] __do_softirq+0x1b7/0x7d4 [ 31.013056] [ 31.013269] Last potentially related work creation: [ 31.013848] kasan_save_stack+0x22/0x50 [ 31.014372] __kasan_record_aux_stack+0x8e/0xa0 [ 31.014976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.015625] remove_vma+0x139/0x170 [ 31.016102] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.016666] do_vmi_munmap+0x1f1/0x2b0 [ 31.017173] __vm_munmap+0x138/0x3a0 [ 31.017643] __x64_sys_munmap+0x59/0x80 [ 31.018158] do_syscall_64+0x3f/0x90 [ 31.018655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.019318] [ 31.019536] The buggy address belongs to the object at ffff88800f6cbbc8 [ 31.019536] which belongs to the cache vm_area_struct of size 168 [ 31.021041] The buggy address is located 88 bytes inside of [ 31.021041] freed 168-byte region [ffff88800f6cbbc8, ffff88800f6cbc70) [ 31.022471] [ 31.022689] The buggy address belongs to the physical page: [ 31.023373] page:00000000e4363a7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6cb [ 31.024480] memcg:ffff8880099ec701 [ 31.024911] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.025569] page_type: 0xffffffff() [ 31.026038] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.026982] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099ec701 [ 31.027920] page dumped because: kasan: bad access detected [ 31.028602] [ 31.028821] Memory state around the buggy address: [ 31.029434] ffff88800f6cbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.030319] ffff88800f6cbb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.031218] >ffff88800f6cbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.032080] ^ [ 31.032620] ffff88800f6cbc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.033495] ffff88800f6cbd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.034364] ================================================================== [ 31.035398] Disabling lock debugging due to kernel taint [ 32.776847] BUG: Bad rss-counter state mm:00000000d59a3448 type:MM_FILEPAGES val:33 [ 32.777495] BUG: Bad rss-counter state mm:00000000d59a3448 type:MM_ANONPAGES val:22 [ 33.176739] BUG: Bad rss-counter state mm:00000000ca01f8d4 type:MM_FILEPAGES val:33 [ 33.177650] BUG: Bad rss-counter state mm:00000000ca01f8d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23601' (ECDSA) to the list of known hosts. 2023/06/20 16:23:39 fuzzer started 2023/06/20 16:23:39 dialing manager at localhost:36067 2023/06/20 16:23:39 checking machine... 2023/06/20 16:23:39 checking revisions... [ 33.883935] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:23:39 testing simple program... [ 33.931243] cgroup: Unknown subsys name 'net' [ 33.974633] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:23:39 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=00007f07d362db40 CR3=000000000c79e000 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=bd345e0b32c9fbb77d43c8191ac134cb XMM02=2c67c8bc2e329bc3000000000011b6e8 XMM03=fb795ef6d65770560000000000122158 XMM04=d292b408fda08ada00000000000ae988 XMM05=82ec38f8e411212400000000001324f0 XMM06=c291bd5c70af25b90000000000132178 XMM07=e042d86d42eb936e00000000001223d8 XMM08=ac8a2aff97bd8dab000000000011b748 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800eb78000 RCX=ffffffff818e8876 RDX=ffff8880162d9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000008 RSP=ffff88800ed1fea8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800eb78060 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0864 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 00007f6e52a29900 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=00007ffca213f000 CR3=0000000009680000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000