syzkaller login: [ 47.550760] BUG: Bad rss-counter state mm:0000000055d4e015 type:MM_FILEPAGES val:33 [ 47.552750] BUG: Bad rss-counter state mm:0000000055d4e015 type:MM_ANONPAGES val:22 [ 47.716554] ================================================================== [ 47.717500] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.718446] Read of size 8 at addr ffff88800cb61df0 by task sshd/226 [ 47.719230] [ 47.719555] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.720410] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.721417] Call Trace: [ 47.721754] [ 47.722040] dump_stack_lvl+0x91/0xf0 [ 47.722529] print_report+0xcc/0x620 [ 47.723017] ? __virt_addr_valid+0x102/0x340 [ 47.723565] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.724184] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.724803] kasan_report+0xbe/0xf0 [ 47.725296] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.725918] vma_interval_tree_remove+0xc75/0xec0 [ 47.726516] vma_prepare+0xc54/0x11a0 [ 47.726990] __split_vma+0x5af/0x950 [ 47.727457] ? __pfx___split_vma+0x10/0x10 [ 47.727982] ? find_held_lock+0x2c/0x110 [ 47.728507] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.729084] ? lock_is_held_type+0x9f/0x120 [ 47.729625] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.730233] ? mtree_range_walk+0x632/0x900 [ 47.730789] ? mas_walk+0x5c7/0x7c0 [ 47.731262] do_vmi_munmap+0x1f1/0x2b0 [ 47.731761] mmap_region+0x1f9/0x2660 [ 47.732238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.732745] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.733461] ? __pfx_lock_acquire+0x10/0x10 [ 47.733996] ? __pfx_mmap_region+0x10/0x10 [ 47.734523] ? security_mmap_addr+0x7d/0xa0 [ 47.735052] ? get_unmapped_area+0x1f5/0x3f0 [ 47.735605] do_mmap+0x854/0xf00 [ 47.736048] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.736545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.737122] ksys_mmap_pgoff+0x3af/0x500 [ 47.737625] do_syscall_64+0x3f/0x90 [ 47.738098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.738743] RIP: 0033:0x7f92b542fd82 [ 47.739194] 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 [ 47.741331] RSP: 002b:00007ffd77b50ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.742234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92b542fd82 [ 47.743077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92b4869000 [ 47.743925] RBP: 00007f92b4869000 R08: 0000000000000009 R09: 0000000000001000 [ 47.744780] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a426f73d90 [ 47.745628] R13: 00007ffd77b50ad0 R14: 00007ffd77b50b00 R15: 00007ffd77b50e60 [ 47.746487] [ 47.746777] [ 47.746990] Allocated by task 219: [ 47.747418] kasan_save_stack+0x22/0x50 [ 47.747918] kasan_set_track+0x25/0x30 [ 47.748419] __kasan_slab_alloc+0x59/0x70 [ 47.748963] kmem_cache_alloc+0x16b/0x370 [ 47.749478] vm_area_dup+0x20/0x160 [ 47.749932] __split_vma+0x170/0x950 [ 47.750407] split_vma+0xc6/0x110 [ 47.750846] mprotect_fixup+0x8d2/0xb30 [ 47.751348] do_mprotect_pkey+0x87e/0xd40 [ 47.751864] __x64_sys_mprotect+0x78/0xc0 [ 47.752382] do_syscall_64+0x3f/0x90 [ 47.752860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.753505] [ 47.753724] Freed by task 219: [ 47.754112] kasan_save_stack+0x22/0x50 [ 47.754618] kasan_set_track+0x25/0x30 [ 47.755111] kasan_save_free_info+0x2b/0x50 [ 47.755642] __kasan_slab_free+0x10a/0x190 [ 47.756179] kmem_cache_free+0x10d/0x4d0 [ 47.756681] rcu_core+0x8c8/0x2860 [ 47.757142] __do_softirq+0x1b7/0x7d4 [ 47.757615] [ 47.757830] Last potentially related work creation: [ 47.758426] kasan_save_stack+0x22/0x50 [ 47.758935] __kasan_record_aux_stack+0x8e/0xa0 [ 47.759511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.760158] remove_vma+0x139/0x170 [ 47.760614] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.761183] do_vmi_munmap+0x1f1/0x2b0 [ 47.761671] __vm_munmap+0x138/0x3a0 [ 47.762134] __x64_sys_munmap+0x59/0x80 [ 47.762632] do_syscall_64+0x3f/0x90 [ 47.763107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.763746] [ 47.763961] The buggy address belongs to the object at ffff88800cb61d98 [ 47.763961] which belongs to the cache vm_area_struct of size 168 [ 47.765457] The buggy address is located 88 bytes inside of [ 47.765457] freed 168-byte region [ffff88800cb61d98, ffff88800cb61e40) [ 47.766873] [ 47.767087] The buggy address belongs to the physical page: [ 47.767761] page:0000000010dfc73b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb61 [ 47.768836] memcg:ffff88801a001901 [ 47.769278] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.769919] page_type: 0xffffffff() [ 47.770364] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.771281] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a001901 [ 47.772186] page dumped because: kasan: bad access detected [ 47.772848] [ 47.773068] Memory state around the buggy address: [ 47.773651] ffff88800cb61c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 47.774512] ffff88800cb61d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 47.775370] >ffff88800cb61d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 47.776227] ^ [ 47.777049] ffff88800cb61e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 47.777901] ffff88800cb61e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.778758] ================================================================== [ 47.779878] Disabling lock debugging due to kernel taint [ 49.753818] BUG: Bad rss-counter state mm:00000000f299bce6 type:MM_FILEPAGES val:33 [ 49.755009] BUG: Bad rss-counter state mm:00000000f299bce6 type:MM_ANONPAGES val:22 [ 50.117946] BUG: Bad rss-counter state mm:0000000089359d45 type:MM_FILEPAGES val:33 [ 50.118932] BUG: Bad rss-counter state mm:0000000089359d45 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6891' (ECDSA) to the list of known hosts. 2023/06/19 23:03:00 fuzzer started 2023/06/19 23:03:00 dialing manager at localhost:44161 2023/06/19 23:03:00 checking machine... 2023/06/19 23:03:00 checking revisions... [ 50.795410] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:03:00 testing simple program... [ 50.855183] cgroup: Unknown subsys name 'net' [ 50.912516] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:02:47 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=00007efcd54b7fc0 CR3=000000000e4d4000 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=2039353a32303a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a32303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000b9e45b3f6 RBX=ffffffff813fc4c0 RCX=0000000000000018 RDX=ffff888015c30000 RSI=0000000b9e45b3f6 RDI=ffff88806cf2c240 RBP=ffff88806cf2c250 RSP=ffff88801cc07d50 R8 =0000000000000004 R9 =0000000000013aac R10=0000000000013aac R11=0000000000000000 R12=0000000b9e45b3f6 R13=ffff88806cf2c240 R14=ffff88801cc07f58 R15=dffffc0000000000 RIP=ffffffff813fc042 RFL=00000006 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5d737f0900 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=00007fff950ea000 CR3=000000000fc60000 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