syzkaller login: [ 34.320788] BUG: Bad rss-counter state mm:00000000fdd35d92 type:MM_FILEPAGES val:33 [ 34.321993] BUG: Bad rss-counter state mm:00000000fdd35d92 type:MM_ANONPAGES val:22 [ 34.479828] ================================================================== [ 34.480824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.481855] Read of size 8 at addr ffff888019d7bd08 by task sshd/219 [ 34.482786] [ 34.483027] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.483958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.485041] Call Trace: [ 34.485398] [ 34.485713] dump_stack_lvl+0x91/0xf0 [ 34.486250] print_report+0xcc/0x620 [ 34.486795] ? __virt_addr_valid+0x102/0x340 [ 34.487412] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.488105] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.488792] kasan_report+0xbe/0xf0 [ 34.489326] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.490020] vma_interval_tree_remove+0xc75/0xec0 [ 34.490703] vma_prepare+0xc54/0x11a0 [ 34.491272] __split_vma+0x5af/0x950 [ 34.491810] ? __pfx___split_vma+0x10/0x10 [ 34.492383] ? find_held_lock+0x2c/0x110 [ 34.492944] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.493555] ? lock_is_held_type+0x9f/0x120 [ 34.494129] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.494796] ? mtree_range_walk+0x632/0x900 [ 34.495384] ? mas_walk+0x5c7/0x7c0 [ 34.495892] do_vmi_munmap+0x1f1/0x2b0 [ 34.496428] mmap_region+0x1f9/0x2660 [ 34.496944] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.497494] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.498260] ? __pfx_lock_acquire+0x10/0x10 [ 34.498842] ? __pfx_mmap_region+0x10/0x10 [ 34.499416] ? security_mmap_addr+0x7d/0xa0 [ 34.499984] ? get_unmapped_area+0x1f5/0x3f0 [ 34.500574] do_mmap+0x854/0xf00 [ 34.501053] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.501591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.502200] ksys_mmap_pgoff+0x3af/0x500 [ 34.502761] do_syscall_64+0x3f/0x90 [ 34.503283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.503975] RIP: 0033:0x7f243d5c6d82 [ 34.504465] 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 [ 34.506754] RSP: 002b:00007ffdeef8a5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.507678] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f243d5c6d82 [ 34.508533] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f243ca00000 [ 34.509377] RBP: 00007f243ca00000 R08: 0000000000000009 R09: 0000000000001000 [ 34.510216] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f24e4bf70 [ 34.511089] R13: 00007ffdeef8a5d0 R14: 00007ffdeef8a600 R15: 00007ffdeef8a960 [ 34.511941] [ 34.512235] [ 34.512449] Allocated by task 212: [ 34.512882] kasan_save_stack+0x22/0x50 [ 34.513385] kasan_set_track+0x25/0x30 [ 34.513881] __kasan_slab_alloc+0x59/0x70 [ 34.514410] kmem_cache_alloc+0x16b/0x370 [ 34.514935] vm_area_dup+0x20/0x160 [ 34.515418] __split_vma+0x170/0x950 [ 34.515917] split_vma+0xc6/0x110 [ 34.516387] mprotect_fixup+0x8d2/0xb30 [ 34.516927] do_mprotect_pkey+0x87e/0xd40 [ 34.517484] __x64_sys_mprotect+0x78/0xc0 [ 34.518045] do_syscall_64+0x3f/0x90 [ 34.518553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.519246] [ 34.519477] Freed by task 202: [ 34.519897] kasan_save_stack+0x22/0x50 [ 34.520436] kasan_set_track+0x25/0x30 [ 34.520967] kasan_save_free_info+0x2b/0x50 [ 34.521534] __kasan_slab_free+0x10a/0x190 [ 34.522111] kmem_cache_free+0x10d/0x4d0 [ 34.522656] rcu_core+0x8c8/0x2860 [ 34.523155] __do_softirq+0x1b7/0x7d4 [ 34.523665] [ 34.523896] Last potentially related work creation: [ 34.524520] kasan_save_stack+0x22/0x50 [ 34.525060] __kasan_record_aux_stack+0x8e/0xa0 [ 34.525673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.526361] remove_vma+0x139/0x170 [ 34.526849] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.527449] do_vmi_munmap+0x1f1/0x2b0 [ 34.527970] __vm_munmap+0x138/0x3a0 [ 34.528469] __x64_sys_munmap+0x59/0x80 [ 34.529004] do_syscall_64+0x3f/0x90 [ 34.529509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.530203] [ 34.530444] Second to last potentially related work creation: [ 34.531210] kasan_save_stack+0x22/0x50 [ 34.531765] __kasan_record_aux_stack+0x8e/0xa0 [ 34.532392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.533119] remove_vma+0x139/0x170 [ 34.533627] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.534254] do_vmi_munmap+0x1f1/0x2b0 [ 34.534811] mmap_region+0x1f9/0x2660 [ 34.535374] do_mmap+0x854/0xf00 [ 34.535876] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.536448] ksys_mmap_pgoff+0x3af/0x500 [ 34.537034] do_syscall_64+0x3f/0x90 [ 34.537581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.538308] [ 34.538552] The buggy address belongs to the object at ffff888019d7bcb0 [ 34.538552] which belongs to the cache vm_area_struct of size 168 [ 34.540210] The buggy address is located 88 bytes inside of [ 34.540210] freed 168-byte region [ffff888019d7bcb0, ffff888019d7bd58) [ 34.541782] [ 34.542028] The buggy address belongs to the physical page: [ 34.542765] page:000000007cc3469e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d7b [ 34.543970] memcg:ffff888019d78201 [ 34.544426] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.545114] page_type: 0xffffffff() [ 34.545591] raw: 0100000000000200 ffff88800879fc80 ffffea0000259d40 0000000000000002 [ 34.546580] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d78201 [ 34.547560] page dumped because: kasan: bad access detected [ 34.548270] [ 34.548500] Memory state around the buggy address: [ 34.549123] ffff888019d7bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 34.550066] ffff888019d7bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.551022] >ffff888019d7bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.551973] ^ [ 34.552456] ffff888019d7bd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.553400] ffff888019d7be00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.554335] ================================================================== [ 34.555902] Disabling lock debugging due to kernel taint [ 36.536304] BUG: Bad rss-counter state mm:00000000c4c5071c type:MM_FILEPAGES val:33 [ 36.537246] BUG: Bad rss-counter state mm:00000000c4c5071c type:MM_ANONPAGES val:22 [ 37.057604] BUG: Bad rss-counter state mm:00000000bd855852 type:MM_FILEPAGES val:33 [ 37.058801] BUG: Bad rss-counter state mm:00000000bd855852 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19709' (ECDSA) to the list of known hosts. 2023/06/19 19:04:46 fuzzer started 2023/06/19 19:04:47 dialing manager at localhost:44161 2023/06/19 19:04:47 checking machine... 2023/06/19 19:04:47 checking revisions... [ 37.816078] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:04:47 testing simple program... [ 37.863235] cgroup: Unknown subsys name 'net' [ 37.915711] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:04:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f9b0b4c0a70 CR3=000000000fe88000 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=2036343a34303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a34303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=c2ceace138dcfd00 RBX=0000557d778aa780 RCX=00007f3f2152a6c3 RDX=0000000000000002 RSI=0000000000000004 RDI=0000557d77893350 RBP=0000000000000000 RSP=00007ffcd261a700 R8 =0000557d778a4630 R9 =00007ffcd2613bc8 R10=0000557d76051d21 R11=0000000000000246 R12=0000557d77893350 R13=0000000000000002 R14=0000000000000004 R15=00007ffcd261a990 RIP=00007f3f21b70149 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3f21047900 00000000 00000000 GS =0000 0000000000000000 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=00007ffcd2614000 CR3=000000000cb7e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000