syzkaller login: [ 30.672032] BUG: Bad rss-counter state mm:00000000212606f6 type:MM_FILEPAGES val:33 [ 30.673330] BUG: Bad rss-counter state mm:00000000212606f6 type:MM_ANONPAGES val:22 [ 30.836886] ================================================================== [ 30.837797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.838728] Read of size 8 at addr ffff88800dbc4798 by task sshd/221 [ 30.839509] [ 30.839727] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.840743] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.841729] Call Trace: [ 30.842049] [ 30.842400] dump_stack_lvl+0x91/0xf0 [ 30.843052] print_report+0xcc/0x620 [ 30.843657] ? __virt_addr_valid+0x102/0x340 [ 30.844332] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.845088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.845833] kasan_report+0xbe/0xf0 [ 30.846440] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847261] vma_interval_tree_remove+0xc75/0xec0 [ 30.848041] vma_prepare+0xc54/0x11a0 [ 30.848643] __split_vma+0x5af/0x950 [ 30.849244] ? __pfx___split_vma+0x10/0x10 [ 30.849903] ? find_held_lock+0x2c/0x110 [ 30.850572] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.851310] ? lock_is_held_type+0x9f/0x120 [ 30.851866] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.852495] ? mtree_range_walk+0x632/0x900 [ 30.853066] ? mas_walk+0x5c7/0x7c0 [ 30.853550] do_vmi_munmap+0x1f1/0x2b0 [ 30.854057] mmap_region+0x1f9/0x2660 [ 30.854536] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.855091] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.855807] ? __pfx_lock_acquire+0x10/0x10 [ 30.856355] ? __pfx_mmap_region+0x10/0x10 [ 30.856889] ? security_mmap_addr+0x7d/0xa0 [ 30.857433] ? get_unmapped_area+0x1f5/0x3f0 [ 30.857993] do_mmap+0x854/0xf00 [ 30.858445] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.858959] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.859549] ksys_mmap_pgoff+0x3af/0x500 [ 30.860076] do_syscall_64+0x3f/0x90 [ 30.860565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.861229] RIP: 0033:0x7fbb53022d82 [ 30.861686] 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 [ 30.863866] RSP: 002b:00007ffe1f43a458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.864786] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb53022d82 [ 30.865652] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb5245c000 [ 30.866516] RBP: 00007fbb5245c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.867393] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8263fab20 [ 30.868255] R13: 00007ffe1f43a470 R14: 00007ffe1f43a4a0 R15: 00007ffe1f43a800 [ 30.869126] [ 30.869416] [ 30.869635] Allocated by task 214: [ 30.870099] kasan_save_stack+0x22/0x50 [ 30.870611] kasan_set_track+0x25/0x30 [ 30.871162] __kasan_slab_alloc+0x59/0x70 [ 30.871687] kmem_cache_alloc+0x16b/0x370 [ 30.872259] vm_area_dup+0x20/0x160 [ 30.872721] __split_vma+0x170/0x950 [ 30.873217] split_vma+0xc6/0x110 [ 30.873664] mprotect_fixup+0x8d2/0xb30 [ 30.874181] do_mprotect_pkey+0x87e/0xd40 [ 30.874705] __x64_sys_mprotect+0x78/0xc0 [ 30.875247] do_syscall_64+0x3f/0x90 [ 30.875729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876382] [ 30.876599] Freed by task 214: [ 30.876997] kasan_save_stack+0x22/0x50 [ 30.877522] kasan_set_track+0x25/0x30 [ 30.878035] kasan_save_free_info+0x2b/0x50 [ 30.878571] __kasan_slab_free+0x10a/0x190 [ 30.879163] kmem_cache_free+0x10d/0x4d0 [ 30.879671] rcu_core+0x8c8/0x2860 [ 30.880134] __do_softirq+0x1b7/0x7d4 [ 30.880618] [ 30.880905] Last potentially related work creation: [ 30.881522] kasan_save_stack+0x22/0x50 [ 30.882039] __kasan_record_aux_stack+0x8e/0xa0 [ 30.882614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.883281] remove_vma+0x139/0x170 [ 30.883737] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.884314] do_vmi_munmap+0x1f1/0x2b0 [ 30.884796] __vm_munmap+0x138/0x3a0 [ 30.885286] __x64_sys_munmap+0x59/0x80 [ 30.885782] do_syscall_64+0x3f/0x90 [ 30.886277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.886936] [ 30.887164] Second to last potentially related work creation: [ 30.887836] kasan_save_stack+0x22/0x50 [ 30.888354] __kasan_record_aux_stack+0x8e/0xa0 [ 30.888920] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.889593] remove_vma+0x139/0x170 [ 30.890060] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.890620] do_vmi_munmap+0x1f1/0x2b0 [ 30.891153] mmap_region+0x1f9/0x2660 [ 30.891635] do_mmap+0x854/0xf00 [ 30.892081] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.892572] ksys_mmap_pgoff+0x3af/0x500 [ 30.893094] do_syscall_64+0x3f/0x90 [ 30.893576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894231] [ 30.894453] The buggy address belongs to the object at ffff88800dbc4740 [ 30.894453] which belongs to the cache vm_area_struct of size 168 [ 30.895937] The buggy address is located 88 bytes inside of [ 30.895937] freed 168-byte region [ffff88800dbc4740, ffff88800dbc47e8) [ 30.897367] [ 30.897582] The buggy address belongs to the physical page: [ 30.898245] page:00000000cd99bb20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbc4 [ 30.899371] memcg:ffff88800d771e01 [ 30.899806] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.900467] page_type: 0xffffffff() [ 30.900919] raw: 0100000000000200 ffff8880087a0c80 ffffea000039b240 dead000000000006 [ 30.901872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d771e01 [ 30.902800] page dumped because: kasan: bad access detected [ 30.903486] [ 30.903703] Memory state around the buggy address: [ 30.904302] ffff88800dbc4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.905181] ffff88800dbc4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.906056] >ffff88800dbc4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.906916] ^ [ 30.907565] ffff88800dbc4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.908713] ffff88800dbc4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.909845] ================================================================== [ 30.911023] Disabling lock debugging due to kernel taint [ 33.417110] BUG: Bad rss-counter state mm:0000000099e3d197 type:MM_FILEPAGES val:33 [ 33.418301] BUG: Bad rss-counter state mm:0000000099e3d197 type:MM_ANONPAGES val:22 [ 33.914682] BUG: Bad rss-counter state mm:00000000c006fb72 type:MM_FILEPAGES val:33 [ 33.915850] BUG: Bad rss-counter state mm:00000000c006fb72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46695' (ECDSA) to the list of known hosts. 2023/06/20 16:21:29 fuzzer started 2023/06/20 16:21:29 dialing manager at localhost:36067 2023/06/20 16:21:29 checking machine... 2023/06/20 16:21:29 checking revisions... [ 34.583067] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:21:29 testing simple program... [ 34.630032] cgroup: Unknown subsys name 'net' [ 34.701757] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:21:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652d08 RCX=0000000000000000 RDX=ffff888019609b40 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800ebaf440 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000000000 RIP=ffffffff84511dc0 RFL=00000293 [--S-A-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 00007f2240e15700 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=00007ffceaa0cc08 CR3=000000000cc82000 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=2039323a31323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a31323a3631203032 XMM08=747379733a755f6d65747379733d6a62 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=0000000000000001 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=00007f0de5eda110 CR3=0000000014566000 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=34ac11d14ec850abc0421cd26540c065 XMM02=000000000011bbd8eff9b2d0a8fce9cb XMM03=000000000011bca82c67c8bc2e329bc3 XMM04=c557a6c0c7fcf52000000000000ae988 XMM05=c746f927ce1ba54a0000000000134950 XMM06=c291bd5c70af25b900000000001339f0 XMM07=e042d86d42eb936e0000000000122bd0 XMM08=be6e987d93f8f7f1000000000011bca8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000