syzkaller login: [ 39.613475] BUG: Bad rss-counter state mm:00000000f0ed3678 type:MM_FILEPAGES val:33 [ 39.614931] BUG: Bad rss-counter state mm:00000000f0ed3678 type:MM_ANONPAGES val:22 [ 39.768888] ================================================================== [ 39.769798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.770724] Read of size 8 at addr ffff88801a313ed8 by task sshd/220 [ 39.771485] [ 39.771797] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.772639] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.773619] Call Trace: [ 39.773961] [ 39.774244] dump_stack_lvl+0x91/0xf0 [ 39.774735] print_report+0xcc/0x620 [ 39.775218] ? __virt_addr_valid+0x102/0x340 [ 39.775768] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.776377] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.776988] kasan_report+0xbe/0xf0 [ 39.777459] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.778103] vma_interval_tree_remove+0xc75/0xec0 [ 39.778711] vma_prepare+0xc54/0x11a0 [ 39.779190] __split_vma+0x5af/0x950 [ 39.779656] ? __pfx___split_vma+0x10/0x10 [ 39.780178] ? find_held_lock+0x2c/0x110 [ 39.780697] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.781260] ? lock_is_held_type+0x9f/0x120 [ 39.781811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.782410] ? mtree_range_walk+0x632/0x900 [ 39.782949] ? mas_walk+0x5c7/0x7c0 [ 39.783415] do_vmi_munmap+0x1f1/0x2b0 [ 39.783899] mmap_region+0x1f9/0x2660 [ 39.784389] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.784888] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.785602] ? __pfx_lock_acquire+0x10/0x10 [ 39.786125] ? __pfx_mmap_region+0x10/0x10 [ 39.786651] ? security_mmap_addr+0x7d/0xa0 [ 39.787168] ? get_unmapped_area+0x1f5/0x3f0 [ 39.787716] do_mmap+0x854/0xf00 [ 39.788145] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.788634] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.789184] ksys_mmap_pgoff+0x3af/0x500 [ 39.789706] do_syscall_64+0x3f/0x90 [ 39.790183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.790826] RIP: 0033:0x7fbe5c4f8d82 [ 39.791274] 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 [ 39.793353] RSP: 002b:00007ffff41de118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.794247] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe5c4f8d82 [ 39.795078] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe5b932000 [ 39.795906] RBP: 00007fbe5b932000 R08: 0000000000000009 R09: 0000000000001000 [ 39.796752] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e223ad0ec0 [ 39.797601] R13: 00007ffff41de130 R14: 00007ffff41de160 R15: 00007ffff41de4c0 [ 39.798437] [ 39.798725] [ 39.798936] Allocated by task 213: [ 39.799354] kasan_save_stack+0x22/0x50 [ 39.799855] kasan_set_track+0x25/0x30 [ 39.800337] __kasan_slab_alloc+0x59/0x70 [ 39.800853] kmem_cache_alloc+0x16b/0x370 [ 39.801355] vm_area_dup+0x20/0x160 [ 39.801815] __split_vma+0x170/0x950 [ 39.802273] split_vma+0xc6/0x110 [ 39.802703] mprotect_fixup+0x8d2/0xb30 [ 39.803217] do_mprotect_pkey+0x87e/0xd40 [ 39.803725] __x64_sys_mprotect+0x78/0xc0 [ 39.804237] do_syscall_64+0x3f/0x90 [ 39.804701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.805337] [ 39.805564] Freed by task 213: [ 39.805956] kasan_save_stack+0x22/0x50 [ 39.806461] kasan_set_track+0x25/0x30 [ 39.806946] kasan_save_free_info+0x2b/0x50 [ 39.807476] __kasan_slab_free+0x10a/0x190 [ 39.807999] kmem_cache_free+0x10d/0x4d0 [ 39.808500] rcu_core+0x8c8/0x2860 [ 39.808942] __do_softirq+0x1b7/0x7d4 [ 39.809416] [ 39.809634] Last potentially related work creation: [ 39.810207] kasan_save_stack+0x22/0x50 [ 39.810701] __kasan_record_aux_stack+0x8e/0xa0 [ 39.811274] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.811905] remove_vma+0x139/0x170 [ 39.812350] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.812899] do_vmi_munmap+0x1f1/0x2b0 [ 39.813375] __vm_munmap+0x138/0x3a0 [ 39.813846] __x64_sys_munmap+0x59/0x80 [ 39.814333] do_syscall_64+0x3f/0x90 [ 39.814802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.815434] [ 39.815645] The buggy address belongs to the object at ffff88801a313e80 [ 39.815645] which belongs to the cache vm_area_struct of size 168 [ 39.817088] The buggy address is located 88 bytes inside of [ 39.817088] freed 168-byte region [ffff88801a313e80, ffff88801a313f28) [ 39.818484] [ 39.818696] The buggy address belongs to the physical page: [ 39.819338] page:000000001a2f074e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a313 [ 39.820408] memcg:ffff88800ed2c301 [ 39.820827] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.821460] page_type: 0xffffffff() [ 39.821911] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.822816] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed2c301 [ 39.823710] page dumped because: kasan: bad access detected [ 39.824362] [ 39.824574] Memory state around the buggy address: [ 39.825146] ffff88801a313d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.825997] ffff88801a313e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.826843] >ffff88801a313e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.827678] ^ [ 39.828404] ffff88801a313f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.829264] ffff88801a313f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.830107] ================================================================== [ 39.831049] Disabling lock debugging due to kernel taint [ 42.410955] BUG: Bad rss-counter state mm:0000000053d6a2fa type:MM_FILEPAGES val:33 [ 42.411966] BUG: Bad rss-counter state mm:0000000053d6a2fa type:MM_ANONPAGES val:22 [ 42.904417] BUG: Bad rss-counter state mm:00000000ca3d67ef type:MM_FILEPAGES val:33 [ 42.905472] BUG: Bad rss-counter state mm:00000000ca3d67ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33537' (ECDSA) to the list of known hosts. 2023/06/20 02:58:05 fuzzer started 2023/06/20 02:58:05 dialing manager at localhost:44161 2023/06/20 02:58:05 checking machine... 2023/06/20 02:58:05 checking revisions... [ 43.584306] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:58:05 testing simple program... [ 43.623844] cgroup: Unknown subsys name 'net' [ 43.666173] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:58:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffaf9816340 CR3=000000000d622000 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=8032aac5228da8b42b4f51fcaf44ae40 XMM02=000000000011d6b8ec2efd57dc4c00df XMM03=0000000000124408bea8edb612bf6ba2 XMM04=12fa2ccb07f65e5500000000000ae988 XMM05=e4cb8bb95a7664b60000000000133ce0 XMM06=234ef46b6f5684110000000000132eb8 XMM07=e042d86d42eb936e00000000001246e0 XMM08=bea8edb612bf6ba2000000000011d718 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f6ac030d618 CR3=000000000e222000 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=2034303a38353a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a38353a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000