syzkaller login: [ 34.842825] BUG: Bad rss-counter state mm:00000000f5db4de0 type:MM_FILEPAGES val:33 [ 34.844580] BUG: Bad rss-counter state mm:00000000f5db4de0 type:MM_ANONPAGES val:22 [ 35.001117] ================================================================== [ 35.002067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.003019] Read of size 8 at addr ffff88800e40ca50 by task sshd/219 [ 35.003823] [ 35.004045] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.005125] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.006117] Call Trace: [ 35.006441] [ 35.006728] dump_stack_lvl+0x91/0xf0 [ 35.007224] print_report+0xcc/0x620 [ 35.007742] ? __virt_addr_valid+0x102/0x340 [ 35.008300] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.008935] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.009574] kasan_report+0xbe/0xf0 [ 35.010067] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.010695] vma_interval_tree_remove+0xc75/0xec0 [ 35.011315] vma_prepare+0xc54/0x11a0 [ 35.011804] __split_vma+0x5af/0x950 [ 35.012285] ? __pfx___split_vma+0x10/0x10 [ 35.012823] ? find_held_lock+0x2c/0x110 [ 35.013348] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.013916] ? lock_is_held_type+0x9f/0x120 [ 35.014460] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.015081] ? mtree_range_walk+0x632/0x900 [ 35.015662] ? mas_walk+0x5c7/0x7c0 [ 35.016147] do_vmi_munmap+0x1f1/0x2b0 [ 35.016647] mmap_region+0x1f9/0x2660 [ 35.017140] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.017667] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.018392] ? __pfx_lock_acquire+0x10/0x10 [ 35.018933] ? __pfx_mmap_region+0x10/0x10 [ 35.019473] ? security_mmap_addr+0x7d/0xa0 [ 35.020020] ? get_unmapped_area+0x1f5/0x3f0 [ 35.020575] do_mmap+0x854/0xf00 [ 35.021027] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.021525] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.022096] ksys_mmap_pgoff+0x3af/0x500 [ 35.022606] do_syscall_64+0x3f/0x90 [ 35.023089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.023857] RIP: 0033:0x7feefc051d82 [ 35.024408] 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 [ 35.026967] RSP: 002b:00007ffec90a69c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.028053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feefc051d82 [ 35.029044] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feefb48b000 [ 35.030029] RBP: 00007feefb48b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.031024] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f92fd0ec0 [ 35.032012] R13: 00007ffec90a69e0 R14: 00007ffec90a6a10 R15: 00007ffec90a6d70 [ 35.033001] [ 35.033347] [ 35.033598] Allocated by task 212: [ 35.034103] kasan_save_stack+0x22/0x50 [ 35.034711] kasan_set_track+0x25/0x30 [ 35.035312] __kasan_slab_alloc+0x59/0x70 [ 35.035969] kmem_cache_alloc+0x16b/0x370 [ 35.036605] vm_area_dup+0x20/0x160 [ 35.037165] __split_vma+0x170/0x950 [ 35.037733] split_vma+0xc6/0x110 [ 35.038269] mprotect_fixup+0x8d2/0xb30 [ 35.038869] do_mprotect_pkey+0x87e/0xd40 [ 35.039501] __x64_sys_mprotect+0x78/0xc0 [ 35.040151] do_syscall_64+0x3f/0x90 [ 35.040724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.041513] [ 35.041776] Freed by task 19: [ 35.042244] kasan_save_stack+0x22/0x50 [ 35.042862] kasan_set_track+0x25/0x30 [ 35.043461] kasan_save_free_info+0x2b/0x50 [ 35.044133] __kasan_slab_free+0x10a/0x190 [ 35.044779] kmem_cache_free+0x10d/0x4d0 [ 35.045387] rcu_core+0x8c8/0x2860 [ 35.045931] __do_softirq+0x1b7/0x7d4 [ 35.046580] [ 35.046848] Last potentially related work creation: [ 35.047564] kasan_save_stack+0x22/0x50 [ 35.048187] __kasan_record_aux_stack+0x8e/0xa0 [ 35.048897] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.049681] remove_vma+0x139/0x170 [ 35.050228] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.050895] do_vmi_munmap+0x1f1/0x2b0 [ 35.051482] __vm_munmap+0x138/0x3a0 [ 35.052068] __x64_sys_munmap+0x59/0x80 [ 35.052669] do_syscall_64+0x3f/0x90 [ 35.053247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.054021] [ 35.054278] The buggy address belongs to the object at ffff88800e40c9f8 [ 35.054278] which belongs to the cache vm_area_struct of size 168 [ 35.056077] The buggy address is located 88 bytes inside of [ 35.056077] freed 168-byte region [ffff88800e40c9f8, ffff88800e40caa0) [ 35.057793] [ 35.058059] The buggy address belongs to the physical page: [ 35.058858] page:00000000da783ec8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe40c [ 35.060203] memcg:ffff888015de7b01 [ 35.060731] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.061525] page_type: 0xffffffff() [ 35.062079] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.063198] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015de7b01 [ 35.064325] page dumped because: kasan: bad access detected [ 35.065148] [ 35.065408] Memory state around the buggy address: [ 35.066116] ffff88800e40c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.067163] ffff88800e40c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.068217] >ffff88800e40ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.069237] ^ [ 35.070084] ffff88800e40ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.071119] ffff88800e40cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.072160] ================================================================== [ 35.073286] Disabling lock debugging due to kernel taint [ 37.098774] BUG: Bad rss-counter state mm:0000000026db9c07 type:MM_FILEPAGES val:33 [ 37.099881] BUG: Bad rss-counter state mm:0000000026db9c07 type:MM_ANONPAGES val:22 [ 37.726447] BUG: Bad rss-counter state mm:0000000085b5dd4d type:MM_FILEPAGES val:33 [ 37.727656] BUG: Bad rss-counter state mm:0000000085b5dd4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23840' (ECDSA) to the list of known hosts. 2023/06/19 18:10:51 fuzzer started 2023/06/19 18:10:51 dialing manager at localhost:44161 2023/06/19 18:10:51 checking machine... 2023/06/19 18:10:51 checking revisions... [ 38.407188] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:10:51 testing simple program... [ 38.450471] cgroup: Unknown subsys name 'net' [ 38.496833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:10:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880161405c0 RCX=0000000000000000 RDX=ffff88800fd3d1c0 RSI=ffffffff8386624b RDI=ffffffff8452fffc RBP=ffffffff87f94640 RSP=ffff88801852fdc0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000009 R13=0000000000000000 R14=ffffffff81492ce0 R15=0000000000000001 RIP=ffffffff814c081b 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 00007f5ce1eab900 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=00007f5ce24630b0 CR3=00000000184b8000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007fc5591e2ce0 CR3=000000000d9a2000 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=4ec23aa465af1e84244791b1a122bedb XMM02=000000000011c718ec2efd57dc4c00df XMM03=0000000000123c909c7223a1abe75d3f XMM04=549467144931a34a00000000000ae988 XMM05=dfcdbad4f1609c370000000000133830 XMM06=a685fa31a207df530000000000132698 XMM07=e042d86d42eb936e0000000000123f10 XMM08=9c7223a1abe75d3f000000000011c778 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000