syzkaller login: [ 30.900421] BUG: Bad rss-counter state mm:00000000e24f30cc type:MM_FILEPAGES val:33 [ 30.901649] BUG: Bad rss-counter state mm:00000000e24f30cc type:MM_ANONPAGES val:22 [ 31.048170] ================================================================== [ 31.049081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.050011] Read of size 8 at addr ffff88800d5103f8 by task sshd/219 [ 31.050779] [ 31.050999] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.051965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.052936] Call Trace: [ 31.053257] [ 31.053562] dump_stack_lvl+0x91/0xf0 [ 31.054061] print_report+0xcc/0x620 [ 31.054556] ? __virt_addr_valid+0x102/0x340 [ 31.055109] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.055723] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.056348] kasan_report+0xbe/0xf0 [ 31.056822] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.057440] vma_interval_tree_remove+0xc75/0xec0 [ 31.058057] vma_prepare+0xc54/0x11a0 [ 31.058543] __split_vma+0x5af/0x950 [ 31.059014] ? __pfx___split_vma+0x10/0x10 [ 31.059543] ? find_held_lock+0x2c/0x110 [ 31.060065] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.060636] ? lock_is_held_type+0x9f/0x120 [ 31.061186] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.061794] ? mtree_range_walk+0x632/0x900 [ 31.062346] ? mas_walk+0x5c7/0x7c0 [ 31.062852] do_vmi_munmap+0x1f1/0x2b0 [ 31.063350] mmap_region+0x1f9/0x2660 [ 31.063849] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.064371] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.065095] ? __pfx_lock_acquire+0x10/0x10 [ 31.065627] ? __pfx_mmap_region+0x10/0x10 [ 31.066155] ? security_mmap_addr+0x7d/0xa0 [ 31.066709] ? get_unmapped_area+0x1f5/0x3f0 [ 31.067259] do_mmap+0x854/0xf00 [ 31.067704] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.068197] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.068769] ksys_mmap_pgoff+0x3af/0x500 [ 31.069277] do_syscall_64+0x3f/0x90 [ 31.069757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.070402] RIP: 0033:0x7f45bf855d82 [ 31.070888] 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 [ 31.073030] RSP: 002b:00007ffeb26e17b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.073929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45bf855d82 [ 31.074793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45bec8f000 [ 31.075644] RBP: 00007f45bec8f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.076491] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9ba1acb20 [ 31.077359] R13: 00007ffeb26e17d0 R14: 00007ffeb26e1800 R15: 00007ffeb26e1b60 [ 31.078233] [ 31.078546] [ 31.078765] Allocated by task 212: [ 31.079195] kasan_save_stack+0x22/0x50 [ 31.079710] kasan_set_track+0x25/0x30 [ 31.080210] __kasan_slab_alloc+0x59/0x70 [ 31.080738] kmem_cache_alloc+0x16b/0x370 [ 31.081264] vm_area_dup+0x20/0x160 [ 31.081723] __split_vma+0x170/0x950 [ 31.082187] split_vma+0xc6/0x110 [ 31.082633] mprotect_fixup+0x8d2/0xb30 [ 31.083147] do_mprotect_pkey+0x87e/0xd40 [ 31.083670] __x64_sys_mprotect+0x78/0xc0 [ 31.084193] do_syscall_64+0x3f/0x90 [ 31.084678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.085321] [ 31.085546] Freed by task 210: [ 31.085941] kasan_save_stack+0x22/0x50 [ 31.086451] kasan_set_track+0x25/0x30 [ 31.086959] kasan_save_free_info+0x2b/0x50 [ 31.087489] __kasan_slab_free+0x10a/0x190 [ 31.088019] kmem_cache_free+0x10d/0x4d0 [ 31.088537] rcu_core+0x8c8/0x2860 [ 31.088993] __do_softirq+0x1b7/0x7d4 [ 31.089474] [ 31.089691] Last potentially related work creation: [ 31.090285] kasan_save_stack+0x22/0x50 [ 31.090811] __kasan_record_aux_stack+0x8e/0xa0 [ 31.091391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.092035] remove_vma+0x139/0x170 [ 31.092496] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.093060] do_vmi_munmap+0x1f1/0x2b0 [ 31.093548] __vm_munmap+0x138/0x3a0 [ 31.094022] __x64_sys_munmap+0x59/0x80 [ 31.094529] do_syscall_64+0x3f/0x90 [ 31.095001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.095650] [ 31.095863] Second to last potentially related work creation: [ 31.096546] kasan_save_stack+0x22/0x50 [ 31.097045] __kasan_record_aux_stack+0x8e/0xa0 [ 31.097625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.098263] remove_vma+0x139/0x170 [ 31.098719] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.099279] do_vmi_munmap+0x1f1/0x2b0 [ 31.099775] mmap_region+0x1f9/0x2660 [ 31.100257] do_mmap+0x854/0xf00 [ 31.100698] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.101204] ksys_mmap_pgoff+0x3af/0x500 [ 31.101707] do_syscall_64+0x3f/0x90 [ 31.102182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102841] [ 31.103059] The buggy address belongs to the object at ffff88800d5103a0 [ 31.103059] which belongs to the cache vm_area_struct of size 168 [ 31.104548] The buggy address is located 88 bytes inside of [ 31.104548] freed 168-byte region [ffff88800d5103a0, ffff88800d510448) [ 31.105978] [ 31.106192] The buggy address belongs to the physical page: [ 31.106860] page:00000000adb1cc03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd510 [ 31.107950] memcg:ffff88800d96ad01 [ 31.108373] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.109025] page_type: 0xffffffff() [ 31.109481] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.110414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d96ad01 [ 31.111329] page dumped because: kasan: bad access detected [ 31.111987] [ 31.112203] Memory state around the buggy address: [ 31.112778] ffff88800d510280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.113638] ffff88800d510300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.114501] >ffff88800d510380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.115356] ^ [ 31.116211] ffff88800d510400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.117073] ffff88800d510480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.117930] ================================================================== [ 31.118987] Disabling lock debugging due to kernel taint [ 33.251987] BUG: Bad rss-counter state mm:0000000018e489e2 type:MM_FILEPAGES val:33 [ 33.253247] BUG: Bad rss-counter state mm:0000000018e489e2 type:MM_ANONPAGES val:22 [ 33.755223] BUG: Bad rss-counter state mm:00000000bc1bde1b type:MM_FILEPAGES val:33 [ 33.756205] BUG: Bad rss-counter state mm:00000000bc1bde1b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52739' (ECDSA) to the list of known hosts. 2023/06/21 01:25:43 fuzzer started 2023/06/21 01:25:43 dialing manager at localhost:36067 2023/06/21 01:25:44 checking machine... 2023/06/21 01:25:44 checking revisions... [ 34.444613] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:25:44 testing simple program... [ 34.490218] cgroup: Unknown subsys name 'net' [ 34.535271] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:25:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86621198 RCX=ffffffff813a0add RDX=ffffffff8542a6c0 RSI=ffffffffffffffff RDI=ffffffff86621198 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000007 R9 =ffffffffff600000 R10=ffffffff86621000 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800eddea00 RIP=ffffffff814c0378 RFL=00000282 [--S----] 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 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=00007f0bc2e6a070 CR3=000000000eac4000 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=2033343a35323a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a35323a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=000000000000000c RCX=1ffffffff0ad4948 RDX=0000000000000004 RSI=fffffffffffffff4 RDI=ffff888018277cb8 RBP=0000000000000000 RSP=ffff888018277c08 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=dffffc0000000000 R14=ffff888016984a00 R15=0000000000000002 RIP=ffffffff8173fdfe 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 00007ffa11f4a900 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=00007ffa11f29020 CR3=000000000cacc000 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=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