syzkaller login: [ 70.886363] BUG: Bad rss-counter state mm:00000000d890a6a8 type:MM_FILEPAGES val:33 [ 70.887389] BUG: Bad rss-counter state mm:00000000d890a6a8 type:MM_ANONPAGES val:22 [ 71.060329] ================================================================== [ 71.061258] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.062222] Read of size 8 at addr ffff888019672058 by task sshd/229 [ 71.063016] [ 71.063370] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 71.064283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.065274] Call Trace: [ 71.065600] [ 71.065898] dump_stack_lvl+0x91/0xf0 [ 71.066392] print_report+0xcc/0x620 [ 71.066882] ? __virt_addr_valid+0x102/0x340 [ 71.067449] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.068084] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.068709] kasan_report+0xbe/0xf0 [ 71.069211] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.069854] vma_interval_tree_remove+0xc75/0xec0 [ 71.070492] vma_prepare+0xc54/0x11a0 [ 71.070988] __split_vma+0x5af/0x950 [ 71.071479] ? __pfx___split_vma+0x10/0x10 [ 71.072043] ? find_held_lock+0x2c/0x110 [ 71.072593] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.073185] ? lock_is_held_type+0x9f/0x120 [ 71.073739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.074374] ? mtree_range_walk+0x632/0x900 [ 71.074955] ? mas_walk+0x5c7/0x7c0 [ 71.075433] do_vmi_munmap+0x1f1/0x2b0 [ 71.075955] mmap_region+0x1f9/0x2660 [ 71.076476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.077019] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.077757] ? __pfx_lock_acquire+0x10/0x10 [ 71.078337] ? __pfx_mmap_region+0x10/0x10 [ 71.078895] ? security_mmap_addr+0x7d/0xa0 [ 71.079454] ? get_unmapped_area+0x1f5/0x3f0 [ 71.080030] do_mmap+0x854/0xf00 [ 71.080497] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.081015] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.081590] ksys_mmap_pgoff+0x3af/0x500 [ 71.082129] do_syscall_64+0x3f/0x90 [ 71.082619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.083292] RIP: 0033:0x7fdf1ed6cd82 [ 71.083767] 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 [ 71.086013] RSP: 002b:00007ffce0d55a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.086962] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf1ed6cd82 [ 71.087833] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf1e1a6000 [ 71.088746] RBP: 00007fdf1e1a6000 R08: 0000000000000009 R09: 0000000000001000 [ 71.089632] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b140bb7ec0 [ 71.090523] R13: 00007ffce0d55a70 R14: 00007ffce0d55aa0 R15: 00007ffce0d55e00 [ 71.091421] [ 71.091731] [ 71.091975] Allocated by task 222: [ 71.092431] kasan_save_stack+0x22/0x50 [ 71.092964] kasan_set_track+0x25/0x30 [ 71.093475] __kasan_slab_alloc+0x59/0x70 [ 71.094044] kmem_cache_alloc+0x16b/0x370 [ 71.094585] vm_area_dup+0x20/0x160 [ 71.095065] __split_vma+0x170/0x950 [ 71.095546] split_vma+0xc6/0x110 [ 71.096015] mprotect_fixup+0x8d2/0xb30 [ 71.096544] do_mprotect_pkey+0x87e/0xd40 [ 71.097086] __x64_sys_mprotect+0x78/0xc0 [ 71.097605] do_syscall_64+0x3f/0x90 [ 71.098096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.098758] [ 71.098993] Freed by task 222: [ 71.099396] kasan_save_stack+0x22/0x50 [ 71.099931] kasan_set_track+0x25/0x30 [ 71.100455] kasan_save_free_info+0x2b/0x50 [ 71.101026] __kasan_slab_free+0x10a/0x190 [ 71.101572] kmem_cache_free+0x10d/0x4d0 [ 71.102111] rcu_core+0x8c8/0x2860 [ 71.102561] __do_softirq+0x1b7/0x7d4 [ 71.103063] [ 71.103280] Last potentially related work creation: [ 71.103893] kasan_save_stack+0x22/0x50 [ 71.104437] __kasan_record_aux_stack+0x8e/0xa0 [ 71.105037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.105704] remove_vma+0x139/0x170 [ 71.106174] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.106744] do_vmi_munmap+0x1f1/0x2b0 [ 71.107250] __vm_munmap+0x138/0x3a0 [ 71.107733] __x64_sys_munmap+0x59/0x80 [ 71.108268] do_syscall_64+0x3f/0x90 [ 71.108753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.109424] [ 71.109648] The buggy address belongs to the object at ffff888019672000 [ 71.109648] which belongs to the cache vm_area_struct of size 168 [ 71.111213] The buggy address is located 88 bytes inside of [ 71.111213] freed 168-byte region [ffff888019672000, ffff8880196720a8) [ 71.112695] [ 71.112931] The buggy address belongs to the physical page: [ 71.113617] page:00000000889abba2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19672 [ 71.114759] memcg:ffff888019667301 [ 71.115211] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.115879] page_type: 0xffffffff() [ 71.116378] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 71.117337] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019667301 [ 71.118306] page dumped because: kasan: bad access detected [ 71.118990] [ 71.119215] Memory state around the buggy address: [ 71.119808] ffff888019671f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 71.120728] ffff888019671f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 71.121633] >ffff888019672000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.122519] ^ [ 71.123285] ffff888019672080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 71.124186] ffff888019672100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.125099] ================================================================== [ 71.126120] Disabling lock debugging due to kernel taint [ 72.992908] BUG: Bad rss-counter state mm:00000000f6a47e0f type:MM_FILEPAGES val:33 [ 72.993660] BUG: Bad rss-counter state mm:00000000f6a47e0f type:MM_ANONPAGES val:22 [ 73.445399] BUG: Bad rss-counter state mm:000000008d3cd2c9 type:MM_FILEPAGES val:33 [ 73.446300] BUG: Bad rss-counter state mm:000000008d3cd2c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1485' (ECDSA) to the list of known hosts. 2023/06/19 21:35:14 fuzzer started 2023/06/19 21:35:14 dialing manager at localhost:44161 2023/06/19 21:35:14 checking machine... 2023/06/19 21:35:14 checking revisions... [ 74.067939] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:35:14 testing simple program... [ 74.115280] cgroup: Unknown subsys name 'net' [ 74.176040] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:35:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81370a3a RCX=0000000000000001 RDX=1ffff1100d9c1359 RSI=ffff88806ce09dc8 RDI=ffffffff81370a3a RBP=ffffffff81370a3a RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed0 R12=0000000000000001 R13=0000000000000000 R14=ffff888009b18000 R15=ffff8880164712e0 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007fb952f4b900 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=00005636b0aabc28 CR3=000000000e984000 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=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 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=ffff888008c58400 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=00007f14b6c6e960 CR3=000000000e400000 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=2033313a35333a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3034 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3034325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a35333a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000