syzkaller login: [ 30.595937] BUG: Bad rss-counter state mm:00000000778961b2 type:MM_FILEPAGES val:33 [ 30.597225] BUG: Bad rss-counter state mm:00000000778961b2 type:MM_ANONPAGES val:22 [ 30.765208] ================================================================== [ 30.766088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.767012] Read of size 8 at addr ffff88800ecfeb38 by task sshd/219 [ 30.767747] [ 30.767958] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.768887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.769816] Call Trace: [ 30.770123] [ 30.770395] dump_stack_lvl+0x91/0xf0 [ 30.770895] print_report+0xcc/0x620 [ 30.771358] ? __virt_addr_valid+0x102/0x340 [ 30.771886] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772473] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773060] kasan_report+0xbe/0xf0 [ 30.773514] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774106] vma_interval_tree_remove+0xc75/0xec0 [ 30.774692] vma_prepare+0xc54/0x11a0 [ 30.775154] __split_vma+0x5af/0x950 [ 30.775606] ? __pfx___split_vma+0x10/0x10 [ 30.776114] ? find_held_lock+0x2c/0x110 [ 30.776616] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.777177] ? lock_is_held_type+0x9f/0x120 [ 30.777731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.778349] ? mtree_range_walk+0x632/0x900 [ 30.778919] ? mas_walk+0x5c7/0x7c0 [ 30.779395] do_vmi_munmap+0x1f1/0x2b0 [ 30.779907] mmap_region+0x1f9/0x2660 [ 30.780390] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.780902] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.781626] ? __pfx_lock_acquire+0x10/0x10 [ 30.782157] ? __pfx_mmap_region+0x10/0x10 [ 30.782698] ? security_mmap_addr+0x7d/0xa0 [ 30.783244] ? get_unmapped_area+0x1f5/0x3f0 [ 30.783806] do_mmap+0x854/0xf00 [ 30.784255] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.784764] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.785327] ksys_mmap_pgoff+0x3af/0x500 [ 30.785838] do_syscall_64+0x3f/0x90 [ 30.786326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786991] RIP: 0033:0x7fd8088a3d82 [ 30.787457] 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 [ 30.789625] RSP: 002b:00007ffe59b1b798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.790526] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8088a3d82 [ 30.791401] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd807cdd000 [ 30.792259] RBP: 00007fd807cdd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.793122] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599ea347f70 [ 30.793978] R13: 00007ffe59b1b7b0 R14: 00007ffe59b1b7e0 R15: 00007ffe59b1bb40 [ 30.794866] [ 30.795159] [ 30.795375] Allocated by task 212: [ 30.795813] kasan_save_stack+0x22/0x50 [ 30.796308] kasan_set_track+0x25/0x30 [ 30.796794] __kasan_slab_alloc+0x59/0x70 [ 30.797319] kmem_cache_alloc+0x16b/0x370 [ 30.797832] vm_area_dup+0x20/0x160 [ 30.798282] __split_vma+0x170/0x950 [ 30.798761] split_vma+0xc6/0x110 [ 30.799194] mprotect_fixup+0x8d2/0xb30 [ 30.799688] do_mprotect_pkey+0x87e/0xd40 [ 30.800211] __x64_sys_mprotect+0x78/0xc0 [ 30.800727] do_syscall_64+0x3f/0x90 [ 30.801196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801851] [ 30.802072] Freed by task 212: [ 30.802467] kasan_save_stack+0x22/0x50 [ 30.802976] kasan_set_track+0x25/0x30 [ 30.803453] kasan_save_free_info+0x2b/0x50 [ 30.803988] __kasan_slab_free+0x10a/0x190 [ 30.804522] kmem_cache_free+0x10d/0x4d0 [ 30.805030] rcu_core+0x8c8/0x2860 [ 30.805464] __do_softirq+0x1b7/0x7d4 [ 30.805938] [ 30.806153] Last potentially related work creation: [ 30.806743] kasan_save_stack+0x22/0x50 [ 30.807249] __kasan_record_aux_stack+0x8e/0xa0 [ 30.807820] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.808467] remove_vma+0x139/0x170 [ 30.808915] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.809459] do_vmi_munmap+0x1f1/0x2b0 [ 30.809937] __vm_munmap+0x138/0x3a0 [ 30.810404] __x64_sys_munmap+0x59/0x80 [ 30.810901] do_syscall_64+0x3f/0x90 [ 30.811367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812009] [ 30.812219] Second to last potentially related work creation: [ 30.812902] kasan_save_stack+0x22/0x50 [ 30.813408] __kasan_record_aux_stack+0x8e/0xa0 [ 30.813997] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.814728] remove_vma+0x139/0x170 [ 30.815241] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.815863] do_vmi_munmap+0x1f1/0x2b0 [ 30.816405] mmap_region+0x1f9/0x2660 [ 30.816947] do_mmap+0x854/0xf00 [ 30.817423] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.817967] ksys_mmap_pgoff+0x3af/0x500 [ 30.818536] do_syscall_64+0x3f/0x90 [ 30.819083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.819819] [ 30.820061] The buggy address belongs to the object at ffff88800ecfeae0 [ 30.820061] which belongs to the cache vm_area_struct of size 168 [ 30.821744] The buggy address is located 88 bytes inside of [ 30.821744] freed 168-byte region [ffff88800ecfeae0, ffff88800ecfeb88) [ 30.823362] [ 30.823607] The buggy address belongs to the physical page: [ 30.824358] page:00000000c3d9a026 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecfe [ 30.825584] memcg:ffff88800eac7501 [ 30.826061] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.826811] page_type: 0xffffffff() [ 30.827313] raw: 0100000000000200 ffff8880087a0c80 ffffea000032a180 dead000000000006 [ 30.828323] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eac7501 [ 30.829349] page dumped because: kasan: bad access detected [ 30.830091] [ 30.830329] Memory state around the buggy address: [ 30.830989] ffff88800ecfea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.831955] ffff88800ecfea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.832921] >ffff88800ecfeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.833883] ^ [ 30.834568] ffff88800ecfeb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.835534] ffff88800ecfec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.836482] ================================================================== [ 30.837604] Disabling lock debugging due to kernel taint [ 33.378721] BUG: Bad rss-counter state mm:0000000027d72c40 type:MM_FILEPAGES val:33 [ 33.380266] BUG: Bad rss-counter state mm:0000000027d72c40 type:MM_ANONPAGES val:22 [ 33.809903] BUG: Bad rss-counter state mm:000000004413516a type:MM_FILEPAGES val:33 [ 33.811167] BUG: Bad rss-counter state mm:000000004413516a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33134' (ECDSA) to the list of known hosts. 2023/06/20 21:48:11 fuzzer started 2023/06/20 21:48:11 dialing manager at localhost:36067 2023/06/20 21:48:11 checking machine... 2023/06/20 21:48:11 checking revisions... [ 34.382895] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:48:11 testing simple program... [ 34.425145] cgroup: Unknown subsys name 'net' [ 34.465683] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:48:11 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09d01 RSI=ffff88806ce09de0 RDI=ffff88806ce09a60 RBP=ffff88806ce09aa8 RSP=ffff88806ce099d8 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09de0 R15=ffff88806ce09a50 RIP=ffffffff811304d5 RFL=00000292 [--S-A--] 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 00007fc41a94b900 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=00007fc41a8ff01c CR3=0000000016cb6000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fffe6114758 CR3=0000000005482000 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=00007f243984f510000055fe2578f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000