syzkaller login: [ 38.805679] BUG: Bad rss-counter state mm:000000008afc7f46 type:MM_FILEPAGES val:33 [ 38.806739] BUG: Bad rss-counter state mm:000000008afc7f46 type:MM_ANONPAGES val:22 [ 38.977648] ================================================================== [ 38.978584] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.979554] Read of size 8 at addr ffff88800cb90968 by task sshd/219 [ 38.980338] [ 38.980562] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.981649] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.982646] Call Trace: [ 38.982992] [ 38.983292] dump_stack_lvl+0x91/0xf0 [ 38.983962] print_report+0xcc/0x620 [ 38.984545] ? __virt_addr_valid+0x102/0x340 [ 38.985224] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.985964] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.986720] kasan_report+0xbe/0xf0 [ 38.987312] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.988087] vma_interval_tree_remove+0xc75/0xec0 [ 38.988812] vma_prepare+0xc54/0x11a0 [ 38.989397] __split_vma+0x5af/0x950 [ 38.989973] ? __pfx___split_vma+0x10/0x10 [ 38.990627] ? find_held_lock+0x2c/0x110 [ 38.991292] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.992042] ? lock_is_held_type+0x9f/0x120 [ 38.992715] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.993481] ? mtree_range_walk+0x632/0x900 [ 38.994036] ? mas_walk+0x5c7/0x7c0 [ 38.994512] do_vmi_munmap+0x1f1/0x2b0 [ 38.995008] mmap_region+0x1f9/0x2660 [ 38.995549] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.996061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.996786] ? __pfx_lock_acquire+0x10/0x10 [ 38.997331] ? __pfx_mmap_region+0x10/0x10 [ 38.997861] ? security_mmap_addr+0x7d/0xa0 [ 38.998391] ? get_unmapped_area+0x1f5/0x3f0 [ 38.998947] do_mmap+0x854/0xf00 [ 38.999430] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.999927] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.000485] ksys_mmap_pgoff+0x3af/0x500 [ 39.000990] do_syscall_64+0x3f/0x90 [ 39.001491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.002147] RIP: 0033:0x7f0b01ef6d82 [ 39.002607] 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 [ 39.004765] RSP: 002b:00007ffeacc74fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.005690] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b01ef6d82 [ 39.006536] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b01330000 [ 39.007418] RBP: 00007f0b01330000 R08: 0000000000000009 R09: 0000000000001000 [ 39.008265] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad6c726d90 [ 39.009123] R13: 00007ffeacc75000 R14: 00007ffeacc75030 R15: 00007ffeacc75390 [ 39.009994] [ 39.010287] [ 39.010504] Allocated by task 212: [ 39.010932] kasan_save_stack+0x22/0x50 [ 39.011473] kasan_set_track+0x25/0x30 [ 39.011972] __kasan_slab_alloc+0x59/0x70 [ 39.012496] kmem_cache_alloc+0x16b/0x370 [ 39.013020] vm_area_dup+0x20/0x160 [ 39.013517] __split_vma+0x170/0x950 [ 39.013986] split_vma+0xc6/0x110 [ 39.014423] mprotect_fixup+0x8d2/0xb30 [ 39.014923] do_mprotect_pkey+0x87e/0xd40 [ 39.015477] __x64_sys_mprotect+0x78/0xc0 [ 39.016005] do_syscall_64+0x3f/0x90 [ 39.016479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.017119] [ 39.017345] Freed by task 212: [ 39.017745] kasan_save_stack+0x22/0x50 [ 39.018246] kasan_set_track+0x25/0x30 [ 39.018750] kasan_save_free_info+0x2b/0x50 [ 39.019307] __kasan_slab_free+0x10a/0x190 [ 39.019870] kmem_cache_free+0x10d/0x4d0 [ 39.020381] rcu_core+0x8c8/0x2860 [ 39.020837] __do_softirq+0x1b7/0x7d4 [ 39.021342] [ 39.021565] Last potentially related work creation: [ 39.022147] kasan_save_stack+0x22/0x50 [ 39.022653] __kasan_record_aux_stack+0x8e/0xa0 [ 39.023226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.023934] remove_vma+0x139/0x170 [ 39.024387] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.024953] do_vmi_munmap+0x1f1/0x2b0 [ 39.025462] __vm_munmap+0x138/0x3a0 [ 39.025946] __x64_sys_munmap+0x59/0x80 [ 39.026443] do_syscall_64+0x3f/0x90 [ 39.026921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.027593] [ 39.027812] Second to last potentially related work creation: [ 39.028499] kasan_save_stack+0x22/0x50 [ 39.029016] __kasan_record_aux_stack+0x8e/0xa0 [ 39.029611] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.030288] remove_vma+0x139/0x170 [ 39.030758] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.031362] do_vmi_munmap+0x1f1/0x2b0 [ 39.031872] __vm_munmap+0x138/0x3a0 [ 39.032355] __x64_sys_munmap+0x59/0x80 [ 39.032883] do_syscall_64+0x3f/0x90 [ 39.033398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.034064] [ 39.034284] The buggy address belongs to the object at ffff88800cb90910 [ 39.034284] which belongs to the cache vm_area_struct of size 168 [ 39.035829] The buggy address is located 88 bytes inside of [ 39.035829] freed 168-byte region [ffff88800cb90910, ffff88800cb909b8) [ 39.037244] [ 39.037459] The buggy address belongs to the physical page: [ 39.038125] page:00000000d5093b4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb90 [ 39.039247] memcg:ffff8880095f8301 [ 39.039704] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.040352] page_type: 0xffffffff() [ 39.040818] raw: 0100000000000200 ffff8880087a0c80 ffffea000025f840 dead000000000008 [ 39.041775] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095f8301 [ 39.042702] page dumped because: kasan: bad access detected [ 39.043394] [ 39.043612] Memory state around the buggy address: [ 39.044193] ffff88800cb90800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.045070] ffff88800cb90880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.045962] >ffff88800cb90900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.046852] ^ [ 39.047697] ffff88800cb90980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.048606] ffff88800cb90a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.049496] ================================================================== [ 39.050738] Disabling lock debugging due to kernel taint [ 41.261344] BUG: Bad rss-counter state mm:0000000011087419 type:MM_FILEPAGES val:33 [ 41.262282] BUG: Bad rss-counter state mm:0000000011087419 type:MM_ANONPAGES val:22 [ 41.752735] BUG: Bad rss-counter state mm:000000007d8fc9f3 type:MM_FILEPAGES val:33 [ 41.753836] BUG: Bad rss-counter state mm:000000007d8fc9f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6062' (ECDSA) to the list of known hosts. 2023/06/20 21:07:52 fuzzer started 2023/06/20 21:07:52 dialing manager at localhost:36067 2023/06/20 21:07:52 checking machine... 2023/06/20 21:07:52 checking revisions... [ 42.514099] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:07:52 testing simple program... [ 42.569932] cgroup: Unknown subsys name 'net' [ 42.624700] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:07:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc5642aff8 CR3=000000000eff2000 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=2031353a37303a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a37303a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c09eed RBX=ffffffff8604f768 RCX=ffffffff8451164b RDX=0000000000000000 RSI=ffffffff864b3166 RDI=ffffffff8604f758 RBP=ffffffff8604f758 RSP=ffff88806cf099e0 R8 =ffffffff864b3166 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5365 R12=ffffffff8604f778 R13=ffffffff8604f758 R14=ffffffff8604f758 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3ad40c0900 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=00007f3ad4c14044 CR3=000000001cad2000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=627cc11a8d0440dd0113c14b9a2b7d4d XMM04=5e3253496039af9b8d4b29f3b29d5286 XMM05=00000000000000000000000000000000 XMM06=5e32531a6004409b0113294b9a2b524d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000