syzkaller login: [ 30.697597] BUG: Bad rss-counter state mm:00000000258ca2c1 type:MM_FILEPAGES val:33 [ 30.698847] BUG: Bad rss-counter state mm:00000000258ca2c1 type:MM_ANONPAGES val:22 [ 30.734781] ================================================================== [ 30.735738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.736683] Read of size 8 at addr ffff88800e9d8d08 by task sshd/220 [ 30.737564] [ 30.737785] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.738682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.739806] Call Trace: [ 30.740199] [ 30.740541] dump_stack_lvl+0x91/0xf0 [ 30.741132] print_report+0xcc/0x620 [ 30.741715] ? __virt_addr_valid+0x102/0x340 [ 30.742379] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743157] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743901] kasan_report+0xbe/0xf0 [ 30.744478] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745228] vma_interval_tree_remove+0xc75/0xec0 [ 30.745965] vma_prepare+0xc54/0x11a0 [ 30.746558] __split_vma+0x5af/0x950 [ 30.747134] ? __pfx___split_vma+0x10/0x10 [ 30.747774] ? find_held_lock+0x2c/0x110 [ 30.748409] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.749091] ? lock_is_held_type+0x9f/0x120 [ 30.749749] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.750512] ? mtree_range_walk+0x632/0x900 [ 30.751169] ? mas_walk+0x5c7/0x7c0 [ 30.751660] do_vmi_munmap+0x1f1/0x2b0 [ 30.752169] mmap_region+0x1f9/0x2660 [ 30.752658] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.753184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.753910] ? __pfx_lock_acquire+0x10/0x10 [ 30.754461] ? __pfx_mmap_region+0x10/0x10 [ 30.755022] ? security_mmap_addr+0x7d/0xa0 [ 30.755571] ? get_unmapped_area+0x1f5/0x3f0 [ 30.756139] do_mmap+0x854/0xf00 [ 30.756590] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.757096] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.757669] ksys_mmap_pgoff+0x3af/0x500 [ 30.758186] do_syscall_64+0x3f/0x90 [ 30.758685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.759346] RIP: 0033:0x7f6e03834d82 [ 30.759818] 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 [ 30.761998] RSP: 002b:00007fff4e523638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.762955] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e03834d82 [ 30.763819] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e02c6e000 [ 30.764682] RBP: 00007f6e02c6e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.765560] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ccee81f70 [ 30.766432] R13: 00007fff4e523650 R14: 00007fff4e523680 R15: 00007fff4e5239e0 [ 30.767321] [ 30.767623] [ 30.767848] Allocated by task 213: [ 30.768299] kasan_save_stack+0x22/0x50 [ 30.768811] kasan_set_track+0x25/0x30 [ 30.769316] __kasan_slab_alloc+0x59/0x70 [ 30.769855] kmem_cache_alloc+0x16b/0x370 [ 30.770382] vm_area_dup+0x20/0x160 [ 30.770852] __split_vma+0x170/0x950 [ 30.771332] split_vma+0xc6/0x110 [ 30.771784] mprotect_fixup+0x8d2/0xb30 [ 30.772308] do_mprotect_pkey+0x87e/0xd40 [ 30.772847] __x64_sys_mprotect+0x78/0xc0 [ 30.773376] do_syscall_64+0x3f/0x90 [ 30.773873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.774533] [ 30.774750] Freed by task 213: [ 30.775148] kasan_save_stack+0x22/0x50 [ 30.775664] kasan_set_track+0x25/0x30 [ 30.776171] kasan_save_free_info+0x2b/0x50 [ 30.776714] __kasan_slab_free+0x10a/0x190 [ 30.777270] kmem_cache_free+0x10d/0x4d0 [ 30.777790] rcu_core+0x8c8/0x2860 [ 30.778241] __do_softirq+0x1b7/0x7d4 [ 30.778738] [ 30.778960] Last potentially related work creation: [ 30.779552] kasan_save_stack+0x22/0x50 [ 30.780065] __kasan_record_aux_stack+0x8e/0xa0 [ 30.780646] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.781305] remove_vma+0x139/0x170 [ 30.781767] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.782342] do_vmi_munmap+0x1f1/0x2b0 [ 30.782869] __vm_munmap+0x138/0x3a0 [ 30.783366] __x64_sys_munmap+0x59/0x80 [ 30.783887] do_syscall_64+0x3f/0x90 [ 30.784386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.785067] [ 30.785290] The buggy address belongs to the object at ffff88800e9d8cb0 [ 30.785290] which belongs to the cache vm_area_struct of size 168 [ 30.786830] The buggy address is located 88 bytes inside of [ 30.786830] freed 168-byte region [ffff88800e9d8cb0, ffff88800e9d8d58) [ 30.788270] [ 30.788484] The buggy address belongs to the physical page: [ 30.789143] page:0000000099ad3372 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9d8 [ 30.790222] memcg:ffff88800ecc6a01 [ 30.790649] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.791293] page_type: 0xffffffff() [ 30.791743] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.792657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecc6a01 [ 30.793568] page dumped because: kasan: bad access detected [ 30.794217] [ 30.794433] Memory state around the buggy address: [ 30.795029] ffff88800e9d8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.795876] ffff88800e9d8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.796728] >ffff88800e9d8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.797572] ^ [ 30.798005] ffff88800e9d8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.798873] ffff88800e9d8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.799722] ================================================================== [ 30.800792] Disabling lock debugging due to kernel taint [ 32.959673] BUG: Bad rss-counter state mm:000000003cb32ccb type:MM_FILEPAGES val:33 [ 32.960833] BUG: Bad rss-counter state mm:000000003cb32ccb type:MM_ANONPAGES val:22 [ 33.360762] BUG: Bad rss-counter state mm:000000004b2f550a type:MM_FILEPAGES val:33 [ 33.363174] BUG: Bad rss-counter state mm:000000004b2f550a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45664' (ECDSA) to the list of known hosts. 2023/06/20 14:12:18 fuzzer started 2023/06/20 14:12:19 dialing manager at localhost:36067 2023/06/20 14:12:19 checking machine... 2023/06/20 14:12:19 checking revisions... [ 34.075494] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:12:19 testing simple program... [ 34.131204] cgroup: Unknown subsys name 'net' [ 34.186381] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:12:18 Registers: info registers vcpu 0 RAX=1ffff11002696db5 RBX=ffff8880134b6d78 RCX=1ffff1100263c8f8 RDX=dffffc0000000000 RSI=ffff888019790b80 RDI=ffff8880134b6da8 RBP=ffff8880131e4790 RSP=ffff8880145d7c58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888019790a48 R13=0000000000000000 R14=ffff888019e6a2a8 R15=ffff888019e6a260 RIP=ffffffff8184767e 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 00007f5b854b2900 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=00007f5b85a67650 CR3=0000000018e68000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100127bd42 RBX=ffffed100127bd43 RCX=ffffffff8184683f RDX=ffffed100127bd43 RSI=0000000000000004 RDI=ffff8880093dea10 RBP=ffffed100127bd42 RSP=ffff88806cf09de8 R8 =0000000000000000 R9 =ffffed100127bd42 R10=ffff8880093dea13 R11=0000000000000000 R12=ffff8880093dea10 R13=ffff8880093de9c0 R14=ffffffff813782f8 R15=ffff888019f3b8a0 RIP=ffffffff8180f189 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 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=00007fc925e80000 CR3=0000000018c66000 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=2038313a32313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a32313a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000