syzkaller login: [ 33.818547] BUG: Bad rss-counter state mm:000000002cce0f77 type:MM_FILEPAGES val:33 [ 33.819574] BUG: Bad rss-counter state mm:000000002cce0f77 type:MM_ANONPAGES val:22 [ 33.996707] ================================================================== [ 33.997814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.998966] Read of size 8 at addr ffff8880145fca50 by task sshd/221 [ 34.000045] [ 34.000310] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.001353] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.002475] Call Trace: [ 34.002711] [ 34.002919] dump_stack_lvl+0x91/0xf0 [ 34.003277] print_report+0xcc/0x620 [ 34.003618] ? __virt_addr_valid+0x102/0x340 [ 34.004013] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.004448] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.004884] kasan_report+0xbe/0xf0 [ 34.005219] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.005657] vma_interval_tree_remove+0xc75/0xec0 [ 34.006125] vma_prepare+0xc54/0x11a0 [ 34.006469] __split_vma+0x5af/0x950 [ 34.006800] ? __pfx___split_vma+0x10/0x10 [ 34.007187] ? find_held_lock+0x2c/0x110 [ 34.007556] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.007960] ? lock_is_held_type+0x9f/0x120 [ 34.008349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.008780] ? mtree_range_walk+0x632/0x900 [ 34.009177] ? mas_walk+0x5c7/0x7c0 [ 34.009511] do_vmi_munmap+0x1f1/0x2b0 [ 34.009869] mmap_region+0x1f9/0x2660 [ 34.010231] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.010602] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.011110] ? __pfx_lock_acquire+0x10/0x10 [ 34.011491] ? __pfx_mmap_region+0x10/0x10 [ 34.011870] ? security_mmap_addr+0x7d/0xa0 [ 34.012249] ? get_unmapped_area+0x1f5/0x3f0 [ 34.012637] do_mmap+0x854/0xf00 [ 34.012946] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.013297] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.013699] ksys_mmap_pgoff+0x3af/0x500 [ 34.014070] do_syscall_64+0x3f/0x90 [ 34.014416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.014882] RIP: 0033:0x7f38cca52d82 [ 34.015209] 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 [ 34.016732] RSP: 002b:00007ffffe18bf88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.017385] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38cca52d82 [ 34.017994] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38cbe8c000 [ 34.018621] RBP: 00007f38cbe8c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.019236] R10: 0000000000000812 R11: 0000000000000206 R12: 000055992dc9af70 [ 34.019846] R13: 00007ffffe18bfa0 R14: 00007ffffe18bfd0 R15: 00007ffffe18c330 [ 34.020454] [ 34.020663] [ 34.020819] Allocated by task 214: [ 34.021128] kasan_save_stack+0x22/0x50 [ 34.021479] kasan_set_track+0x25/0x30 [ 34.021819] __kasan_slab_alloc+0x59/0x70 [ 34.022208] kmem_cache_alloc+0x16b/0x370 [ 34.022579] vm_area_dup+0x20/0x160 [ 34.022901] __split_vma+0x170/0x950 [ 34.023232] split_vma+0xc6/0x110 [ 34.023536] mprotect_fixup+0x8d2/0xb30 [ 34.023900] do_mprotect_pkey+0x87e/0xd40 [ 34.024261] __x64_sys_mprotect+0x78/0xc0 [ 34.024620] do_syscall_64+0x3f/0x90 [ 34.024957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.025404] [ 34.025553] Freed by task 13: [ 34.025826] kasan_save_stack+0x22/0x50 [ 34.026205] kasan_set_track+0x25/0x30 [ 34.026552] kasan_save_free_info+0x2b/0x50 [ 34.026925] __kasan_slab_free+0x10a/0x190 [ 34.027297] kmem_cache_free+0x10d/0x4d0 [ 34.027652] rcu_core+0x8c8/0x2860 [ 34.027967] __do_softirq+0x1b7/0x7d4 [ 34.028303] [ 34.028449] Last potentially related work creation: [ 34.028864] kasan_save_stack+0x22/0x50 [ 34.029219] __kasan_record_aux_stack+0x8e/0xa0 [ 34.029614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.030164] remove_vma+0x139/0x170 [ 34.030733] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.031611] do_vmi_munmap+0x1f1/0x2b0 [ 34.032337] __vm_munmap+0x138/0x3a0 [ 34.032918] __x64_sys_munmap+0x59/0x80 [ 34.033549] do_syscall_64+0x3f/0x90 [ 34.034182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.034996] [ 34.035272] The buggy address belongs to the object at ffff8880145fc9f8 [ 34.035272] which belongs to the cache vm_area_struct of size 168 [ 34.037132] The buggy address is located 88 bytes inside of [ 34.037132] freed 168-byte region [ffff8880145fc9f8, ffff8880145fcaa0) [ 34.038942] [ 34.039196] The buggy address belongs to the physical page: [ 34.039928] page:000000005595dcff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145fc [ 34.041243] memcg:ffff88801679ca01 [ 34.041716] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.042448] page_type: 0xffffffff() [ 34.042956] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.043985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801679ca01 [ 34.045001] page dumped because: kasan: bad access detected [ 34.045740] [ 34.045983] Memory state around the buggy address: [ 34.046645] ffff8880145fc900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.047597] ffff8880145fc980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.048566] >ffff8880145fca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.049517] ^ [ 34.050317] ffff8880145fca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.051274] ffff8880145fcb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.052236] ================================================================== [ 34.053337] Disabling lock debugging due to kernel taint [ 35.994851] BUG: Bad rss-counter state mm:00000000e2ff5c05 type:MM_FILEPAGES val:33 [ 35.995866] BUG: Bad rss-counter state mm:00000000e2ff5c05 type:MM_ANONPAGES val:22 [ 36.491118] BUG: Bad rss-counter state mm:00000000460b9c4a type:MM_FILEPAGES val:33 [ 36.492343] BUG: Bad rss-counter state mm:00000000460b9c4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61073' (ECDSA) to the list of known hosts. 2023/06/19 16:45:30 fuzzer started 2023/06/19 16:45:30 dialing manager at localhost:44161 2023/06/19 16:45:30 checking machine... 2023/06/19 16:45:30 checking revisions... [ 37.211726] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:45:30 testing simple program... [ 37.259724] cgroup: Unknown subsys name 'net' [ 37.311136] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:45:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b2b5a RDX=0000000000000008 RSI=ffff88800ec07f38 RDI=ffff88800ec075a8 RBP=ffff88800ec07600 RSP=ffff88800ec07530 R8 =ffffffff863b2b5e R9 =ffff88800ec075e8 R10=0000000000038001 R11=000000000008abed R12=ffff88800ec07608 R13=ffff88800ec075f0 R14=ffff88800ec07f40 R15=ffff88800ec075a8 RIP=ffffffff811303fa RFL=00000246 [---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 00007f41f991e700 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=00007f6c3bfaa618 CR3=000000001a098000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732030333a3534 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343735 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=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=00007f5ee5812670 CR3=000000001a098000 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=2030333a35343a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a35343a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000