syzkaller login: [ 28.693844] BUG: Bad rss-counter state mm:0000000020b6010d type:MM_FILEPAGES val:33 [ 28.694852] BUG: Bad rss-counter state mm:0000000020b6010d type:MM_ANONPAGES val:22 [ 28.863134] ================================================================== [ 28.864037] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.864977] Read of size 8 at addr ffff88800968dd08 by task sshd/219 [ 28.865748] [ 28.865965] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.866932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.867904] Call Trace: [ 28.868222] <TASK> [ 28.868506] dump_stack_lvl+0x91/0xf0 [ 28.868996] print_report+0xcc/0x620 [ 28.869479] ? __virt_addr_valid+0x102/0x340 [ 28.870028] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.870644] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.871285] kasan_report+0xbe/0xf0 [ 28.871762] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.872456] vma_interval_tree_remove+0xc75/0xec0 [ 28.873058] vma_prepare+0xc54/0x11a0 [ 28.873543] __split_vma+0x5af/0x950 [ 28.874018] ? __pfx___split_vma+0x10/0x10 [ 28.874548] ? find_held_lock+0x2c/0x110 [ 28.875081] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.875646] ? lock_is_held_type+0x9f/0x120 [ 28.876183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.876789] ? mtree_range_walk+0x632/0x900 [ 28.877340] ? mas_walk+0x5c7/0x7c0 [ 28.877814] do_vmi_munmap+0x1f1/0x2b0 [ 28.878313] mmap_region+0x1f9/0x2660 [ 28.878802] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.879334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.880077] ? __pfx_lock_acquire+0x10/0x10 [ 28.880647] ? __pfx_mmap_region+0x10/0x10 [ 28.881175] ? security_mmap_addr+0x7d/0xa0 [ 28.881702] ? get_unmapped_area+0x1f5/0x3f0 [ 28.882257] do_mmap+0x854/0xf00 [ 28.882695] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.883198] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.883758] ksys_mmap_pgoff+0x3af/0x500 [ 28.884265] do_syscall_64+0x3f/0x90 [ 28.884748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.885400] RIP: 0033:0x7f6ca2f69d82 [ 28.885856] 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 [ 28.887993] RSP: 002b:00007ffd0295a798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.888896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ca2f69d82 [ 28.889756] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ca23a3000 [ 28.890610] RBP: 00007f6ca23a3000 R08: 0000000000000009 R09: 0000000000001000 [ 28.891473] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581b59f4f70 [ 28.892315] R13: 00007ffd0295a7b0 R14: 00007ffd0295a7e0 R15: 00007ffd0295ab40 [ 28.893171] </TASK> [ 28.893462] [ 28.893681] Allocated by task 212: [ 28.894108] kasan_save_stack+0x22/0x50 [ 28.894613] kasan_set_track+0x25/0x30 [ 28.895114] __kasan_slab_alloc+0x59/0x70 [ 28.895634] kmem_cache_alloc+0x16b/0x370 [ 28.896152] vm_area_dup+0x20/0x160 [ 28.896609] __split_vma+0x170/0x950 [ 28.897069] split_vma+0xc6/0x110 [ 28.897508] mprotect_fixup+0x8d2/0xb30 [ 28.898006] do_mprotect_pkey+0x87e/0xd40 [ 28.898523] __x64_sys_mprotect+0x78/0xc0 [ 28.899067] do_syscall_64+0x3f/0x90 [ 28.899539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.900180] [ 28.900421] Freed by task 212: [ 28.900812] kasan_save_stack+0x22/0x50 [ 28.901316] kasan_set_track+0x25/0x30 [ 28.901809] kasan_save_free_info+0x2b/0x50 [ 28.902338] __kasan_slab_free+0x10a/0x190 [ 28.902882] kmem_cache_free+0x10d/0x4d0 [ 28.903392] rcu_core+0x8c8/0x2860 [ 28.903833] __do_softirq+0x1b7/0x7d4 [ 28.904312] [ 28.904529] Last potentially related work creation: [ 28.905111] kasan_save_stack+0x22/0x50 [ 28.905613] __kasan_record_aux_stack+0x8e/0xa0 [ 28.906188] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.906833] remove_vma+0x139/0x170 [ 28.907307] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.907866] do_vmi_munmap+0x1f1/0x2b0 [ 28.908351] __vm_munmap+0x138/0x3a0 [ 28.908814] __x64_sys_munmap+0x59/0x80 [ 28.909307] do_syscall_64+0x3f/0x90 [ 28.909776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.910417] [ 28.910631] The buggy address belongs to the object at ffff88800968dcb0 [ 28.910631] which belongs to the cache vm_area_struct of size 168 [ 28.912100] The buggy address is located 88 bytes inside of [ 28.912100] freed 168-byte region [ffff88800968dcb0, ffff88800968dd58) [ 28.913503] [ 28.913717] The buggy address belongs to the physical page: [ 28.914374] page:00000000f8ac4cb6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x968d [ 28.915470] memcg:ffff88800e36df01 [ 28.915897] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.916547] page_type: 0xffffffff() [ 28.917001] raw: 0100000000000200 ffff8880087a0c80 ffffea000036f2c0 dead000000000008 [ 28.917923] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e36df01 [ 28.918862] page dumped because: kasan: bad access detected [ 28.919523] [ 28.919739] Memory state around the buggy address: [ 28.920319] ffff88800968dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 28.921174] ffff88800968dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.922029] >ffff88800968dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.922885] ^ [ 28.923319] ffff88800968dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.924168] ffff88800968de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.925016] ================================================================== [ 28.926001] Disabling lock debugging due to kernel taint [ 30.947322] BUG: Bad rss-counter state mm:00000000f023f81f type:MM_FILEPAGES val:33 [ 30.948430] BUG: Bad rss-counter state mm:00000000f023f81f type:MM_ANONPAGES val:22 [ 31.350212] BUG: Bad rss-counter state mm:000000005f2a61b0 type:MM_FILEPAGES val:33 [ 31.351446] BUG: Bad rss-counter state mm:000000005f2a61b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19786' (ECDSA) to the list of known hosts. 2023/06/20 14:19:12 fuzzer started 2023/06/20 14:19:12 dialing manager at localhost:36067 2023/06/20 14:19:12 checking machine... 2023/06/20 14:19:12 checking revisions... [ 32.040430] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:19:12 testing simple program... [ 32.101495] cgroup: Unknown subsys name 'net' [ 32.167703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:19:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888018d71b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff8880169f7a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88800da31180 RIP=ffffffff814c0400 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 00007f2c3a7f4900 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=00007f2c3adac0b0 CR3=00000000140a8000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fe8d5eff090 CR3=0000000015d68000 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=2031313a39313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a39313a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000