syzkaller login: [ 35.849001] BUG: Bad rss-counter state mm:0000000013388789 type:MM_FILEPAGES val:33 [ 35.850637] BUG: Bad rss-counter state mm:0000000013388789 type:MM_ANONPAGES val:22 [ 36.016121] ================================================================== [ 36.017036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.017972] Read of size 8 at addr ffff88800ef72b38 by task sshd/219 [ 36.018801] [ 36.019099] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.019967] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.020934] Call Trace: [ 36.021296] [ 36.021583] dump_stack_lvl+0x91/0xf0 [ 36.022084] print_report+0xcc/0x620 [ 36.022612] ? __virt_addr_valid+0x102/0x340 [ 36.023205] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.023859] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.024473] kasan_report+0xbe/0xf0 [ 36.024948] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.025570] vma_interval_tree_remove+0xc75/0xec0 [ 36.026178] vma_prepare+0xc54/0x11a0 [ 36.026713] __split_vma+0x5af/0x950 [ 36.027189] ? __pfx___split_vma+0x10/0x10 [ 36.027721] ? find_held_lock+0x2c/0x110 [ 36.028248] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.028821] ? lock_is_held_type+0x9f/0x120 [ 36.029375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.029988] ? mtree_range_walk+0x632/0x900 [ 36.030578] ? mas_walk+0x5c7/0x7c0 [ 36.031087] do_vmi_munmap+0x1f1/0x2b0 [ 36.031581] mmap_region+0x1f9/0x2660 [ 36.032061] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.032569] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.033280] ? __pfx_lock_acquire+0x10/0x10 [ 36.033811] ? __pfx_mmap_region+0x10/0x10 [ 36.034342] ? security_mmap_addr+0x7d/0xa0 [ 36.034929] ? get_unmapped_area+0x1f5/0x3f0 [ 36.035492] do_mmap+0x854/0xf00 [ 36.035931] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.036439] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.037009] ksys_mmap_pgoff+0x3af/0x500 [ 36.037517] do_syscall_64+0x3f/0x90 [ 36.038002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.038690] RIP: 0033:0x7f63372cbd82 [ 36.039170] 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 [ 36.041310] RSP: 002b:00007ffdf965f768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.042220] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63372cbd82 [ 36.043127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6336705000 [ 36.043970] RBP: 00007f6336705000 R08: 0000000000000009 R09: 0000000000001000 [ 36.044826] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c5fd7bd90 [ 36.045683] R13: 00007ffdf965f780 R14: 00007ffdf965f7b0 R15: 00007ffdf965fb10 [ 36.046583] [ 36.046892] [ 36.047110] Allocated by task 212: [ 36.047545] kasan_save_stack+0x22/0x50 [ 36.048060] kasan_set_track+0x25/0x30 [ 36.048557] __kasan_slab_alloc+0x59/0x70 [ 36.049084] kmem_cache_alloc+0x16b/0x370 [ 36.049595] vm_area_dup+0x20/0x160 [ 36.050052] __split_vma+0x170/0x950 [ 36.050560] split_vma+0xc6/0x110 [ 36.051017] mprotect_fixup+0x8d2/0xb30 [ 36.051521] do_mprotect_pkey+0x87e/0xd40 [ 36.052049] __x64_sys_mprotect+0x78/0xc0 [ 36.052584] do_syscall_64+0x3f/0x90 [ 36.053063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.053711] [ 36.053930] Freed by task 203: [ 36.054329] kasan_save_stack+0x22/0x50 [ 36.054897] kasan_set_track+0x25/0x30 [ 36.055394] kasan_save_free_info+0x2b/0x50 [ 36.055927] __kasan_slab_free+0x10a/0x190 [ 36.056458] kmem_cache_free+0x10d/0x4d0 [ 36.056970] rcu_core+0x8c8/0x2860 [ 36.057413] __do_softirq+0x1b7/0x7d4 [ 36.057891] [ 36.058106] Last potentially related work creation: [ 36.058753] kasan_save_stack+0x22/0x50 [ 36.059269] __kasan_record_aux_stack+0x8e/0xa0 [ 36.059841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.060505] remove_vma+0x139/0x170 [ 36.060960] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.061524] do_vmi_munmap+0x1f1/0x2b0 [ 36.062017] __vm_munmap+0x138/0x3a0 [ 36.062542] __x64_sys_munmap+0x59/0x80 [ 36.063079] do_syscall_64+0x3f/0x90 [ 36.063566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.064207] [ 36.064435] Second to last potentially related work creation: [ 36.065116] kasan_save_stack+0x22/0x50 [ 36.065626] __kasan_record_aux_stack+0x8e/0xa0 [ 36.066199] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.066897] remove_vma+0x139/0x170 [ 36.067348] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.067913] do_vmi_munmap+0x1f1/0x2b0 [ 36.068404] mmap_region+0x1f9/0x2660 [ 36.068891] do_mmap+0x854/0xf00 [ 36.069323] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.069815] ksys_mmap_pgoff+0x3af/0x500 [ 36.070321] do_syscall_64+0x3f/0x90 [ 36.070857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.071515] [ 36.071733] The buggy address belongs to the object at ffff88800ef72ae0 [ 36.071733] which belongs to the cache vm_area_struct of size 168 [ 36.073223] The buggy address is located 88 bytes inside of [ 36.073223] freed 168-byte region [ffff88800ef72ae0, ffff88800ef72b88) [ 36.074678] [ 36.074929] The buggy address belongs to the physical page: [ 36.075601] page:00000000de145bb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef72 [ 36.076703] memcg:ffff88800d350d01 [ 36.077132] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.077790] page_type: 0xffffffff() [ 36.078249] raw: 0100000000000200 ffff8880087a0c80 ffffea0000372f40 dead000000000002 [ 36.079223] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d350d01 [ 36.080132] page dumped because: kasan: bad access detected [ 36.080797] [ 36.081013] Memory state around the buggy address: [ 36.081589] ffff88800ef72a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.082462] ffff88800ef72a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 36.083367] >ffff88800ef72b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.084229] ^ [ 36.084850] ffff88800ef72b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 36.085710] ffff88800ef72c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.086604] ================================================================== [ 36.087945] Disabling lock debugging due to kernel taint [ 38.121171] BUG: Bad rss-counter state mm:00000000846cadc0 type:MM_FILEPAGES val:33 [ 38.122179] BUG: Bad rss-counter state mm:00000000846cadc0 type:MM_ANONPAGES val:22 [ 38.587069] BUG: Bad rss-counter state mm:00000000dbd7e82f type:MM_FILEPAGES val:33 [ 38.588113] BUG: Bad rss-counter state mm:00000000dbd7e82f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57287' (ECDSA) to the list of known hosts. 2023/06/21 03:04:38 fuzzer started 2023/06/21 03:04:38 dialing manager at localhost:36067 2023/06/21 03:04:38 checking machine... 2023/06/21 03:04:38 checking revisions... [ 39.306317] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:04:38 testing simple program... [ 39.352736] cgroup: Unknown subsys name 'net' [ 39.407500] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:04:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800d0df9e8 RCX=1ffff11001a1bf44 RDX=1ffff11001dfb481 RSI=ffffffff87b89f80 RDI=ffff88800efda3f8 RBP=ffff88800d0df9f0 RSP=ffff88801637fcc8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800efda3f8 R13=0000000000000000 R14=ffff88800efda3d8 R15=ffff88800efda390 RIP=ffffffff844d3c70 RFL=00000046 [---Z-P-] 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 00007f8e85897900 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=00007ffc202f0000 CR3=000000000e256000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f3ce3b974d0 CR3=000000000c4fc000 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=5d53707f461eb3aa4e45cd7e350ef1a6 XMM02=000000000011b488ec2efd57dc4c00df XMM03=0000000000121e489dd82c310c2d2418 XMM04=99963ae2069e0fc900000000000ae988 XMM05=dfcdbad4f1609c370000000000132d40 XMM06=494233a3110f65380000000000131f18 XMM07=e042d86d42eb936e0000000000122120 XMM08=9dd82c310c2d2418000000000011b4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000