syzkaller login: [ 30.505105] BUG: Bad rss-counter state mm:000000009a6aa21e type:MM_FILEPAGES val:33 [ 30.506782] BUG: Bad rss-counter state mm:000000009a6aa21e type:MM_ANONPAGES val:22 [ 30.662994] ================================================================== [ 30.664092] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.665228] Read of size 8 at addr ffff888010183058 by task sshd/220 [ 30.666277] [ 30.666545] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.667591] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.668934] Call Trace: [ 30.669336] [ 30.669722] dump_stack_lvl+0x91/0xf0 [ 30.670339] print_report+0xcc/0x620 [ 30.670940] ? __virt_addr_valid+0x102/0x340 [ 30.671630] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.672410] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.673178] kasan_report+0xbe/0xf0 [ 30.673786] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.674559] vma_interval_tree_remove+0xc75/0xec0 [ 30.675310] vma_prepare+0xc54/0x11a0 [ 30.675910] __split_vma+0x5af/0x950 [ 30.676503] ? __pfx___split_vma+0x10/0x10 [ 30.677164] ? find_held_lock+0x2c/0x110 [ 30.677848] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.678547] ? lock_is_held_type+0x9f/0x120 [ 30.679103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.679703] ? mtree_range_walk+0x632/0x900 [ 30.680255] ? mas_walk+0x5c7/0x7c0 [ 30.680726] do_vmi_munmap+0x1f1/0x2b0 [ 30.681220] mmap_region+0x1f9/0x2660 [ 30.681697] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.682198] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.682914] ? __pfx_lock_acquire+0x10/0x10 [ 30.683433] ? __pfx_mmap_region+0x10/0x10 [ 30.683963] ? security_mmap_addr+0x7d/0xa0 [ 30.684477] ? get_unmapped_area+0x1f5/0x3f0 [ 30.685023] do_mmap+0x854/0xf00 [ 30.685453] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.685971] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.686519] ksys_mmap_pgoff+0x3af/0x500 [ 30.687019] do_syscall_64+0x3f/0x90 [ 30.687481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.688117] RIP: 0033:0x7f0782d36d82 [ 30.688570] 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 [ 30.690668] RSP: 002b:00007ffcbb39e328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.691558] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0782d36d82 [ 30.692406] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0782170000 [ 30.693258] RBP: 00007f0782170000 R08: 0000000000000009 R09: 0000000000001000 [ 30.694117] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b25f515ec0 [ 30.694959] R13: 00007ffcbb39e340 R14: 00007ffcbb39e370 R15: 00007ffcbb39e6d0 [ 30.695800] [ 30.696080] [ 30.696290] Allocated by task 213: [ 30.696707] kasan_save_stack+0x22/0x50 [ 30.697202] kasan_set_track+0x25/0x30 [ 30.697701] __kasan_slab_alloc+0x59/0x70 [ 30.698226] kmem_cache_alloc+0x16b/0x370 [ 30.698720] vm_area_dup+0x20/0x160 [ 30.699170] __split_vma+0x170/0x950 [ 30.699633] split_vma+0xc6/0x110 [ 30.700065] mprotect_fixup+0x8d2/0xb30 [ 30.700567] do_mprotect_pkey+0x87e/0xd40 [ 30.701089] __x64_sys_mprotect+0x78/0xc0 [ 30.701630] do_syscall_64+0x3f/0x90 [ 30.702096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.702739] [ 30.702946] Freed by task 213: [ 30.703327] kasan_save_stack+0x22/0x50 [ 30.703822] kasan_set_track+0x25/0x30 [ 30.704299] kasan_save_free_info+0x2b/0x50 [ 30.704821] __kasan_slab_free+0x10a/0x190 [ 30.705353] kmem_cache_free+0x10d/0x4d0 [ 30.705886] rcu_core+0x8c8/0x2860 [ 30.706325] __do_softirq+0x1b7/0x7d4 [ 30.706794] [ 30.707008] Last potentially related work creation: [ 30.707680] kasan_save_stack+0x22/0x50 [ 30.708175] __kasan_record_aux_stack+0x8e/0xa0 [ 30.708734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.709367] remove_vma+0x139/0x170 [ 30.709829] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.710388] do_vmi_munmap+0x1f1/0x2b0 [ 30.710862] __vm_munmap+0x138/0x3a0 [ 30.711315] __x64_sys_munmap+0x59/0x80 [ 30.711796] do_syscall_64+0x3f/0x90 [ 30.712267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.712910] [ 30.713127] Second to last potentially related work creation: [ 30.713839] kasan_save_stack+0x22/0x50 [ 30.714340] __kasan_record_aux_stack+0x8e/0xa0 [ 30.714906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.715532] remove_vma+0x139/0x170 [ 30.715983] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.716531] do_vmi_munmap+0x1f1/0x2b0 [ 30.717015] mmap_region+0x1f9/0x2660 [ 30.717489] do_mmap+0x854/0xf00 [ 30.717933] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.718419] ksys_mmap_pgoff+0x3af/0x500 [ 30.718916] do_syscall_64+0x3f/0x90 [ 30.719385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.720017] [ 30.720228] The buggy address belongs to the object at ffff888010183000 [ 30.720228] which belongs to the cache vm_area_struct of size 168 [ 30.721684] The buggy address is located 88 bytes inside of [ 30.721684] freed 168-byte region [ffff888010183000, ffff8880101830a8) [ 30.723053] [ 30.723270] The buggy address belongs to the physical page: [ 30.723920] page:00000000fde4aa6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10183 [ 30.725003] memcg:ffff88800c694b01 [ 30.725426] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.726107] page_type: 0xffffffff() [ 30.726552] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.727460] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c694b01 [ 30.728355] page dumped because: kasan: bad access detected [ 30.729001] [ 30.729212] Memory state around the buggy address: [ 30.729796] ffff888010182f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 30.730638] ffff888010182f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.731475] >ffff888010183000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.732312] ^ [ 30.733028] ffff888010183080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.733896] ffff888010183100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.734730] ================================================================== [ 30.735646] Disabling lock debugging due to kernel taint [ 33.509751] BUG: Bad rss-counter state mm:000000003d5c4cc5 type:MM_FILEPAGES val:33 [ 33.511003] BUG: Bad rss-counter state mm:000000003d5c4cc5 type:MM_ANONPAGES val:22 [ 33.970738] BUG: Bad rss-counter state mm:000000004638084e type:MM_FILEPAGES val:33 [ 33.971813] BUG: Bad rss-counter state mm:000000004638084e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32316' (ECDSA) to the list of known hosts. 2023/06/20 13:28:29 fuzzer started 2023/06/20 13:28:30 dialing manager at localhost:36067 2023/06/20 13:28:30 checking machine... 2023/06/20 13:28:30 checking revisions... [ 34.649501] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:28:30 testing simple program... [ 34.698429] cgroup: Unknown subsys name 'net' [ 34.735741] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:28:29 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100128ef76 RSP=ffff888009477b90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff81803e21 R14=ffff888009477cd0 R15=ffffea0000648900 RIP=ffffffff8135b93c RFL=00000283 [--S---C] 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 00007fea7be8c900 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=00007ffccc226000 CR3=000000000e2bc000 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=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 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=00007f495701a880 CR3=0000000016b8c000 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=2039323a38323a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a38323a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000