syzkaller login: [ 54.131817] BUG: Bad rss-counter state mm:00000000394340bd type:MM_FILEPAGES val:33 [ 54.133283] BUG: Bad rss-counter state mm:00000000394340bd type:MM_ANONPAGES val:22 [ 54.173086] ================================================================== [ 54.174160] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.175327] Read of size 8 at addr ffff8880094a36b0 by task sshd/221 [ 54.176258] [ 54.176518] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.177554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.178718] Call Trace: [ 54.179071] [ 54.179363] dump_stack_lvl+0x91/0xf0 [ 54.179881] print_report+0xcc/0x620 [ 54.180542] ? __virt_addr_valid+0x102/0x340 [ 54.181125] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.181750] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.182511] kasan_report+0xbe/0xf0 [ 54.183041] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.183786] vma_interval_tree_remove+0xc75/0xec0 [ 54.184529] vma_prepare+0xc54/0x11a0 [ 54.185082] __split_vma+0x5af/0x950 [ 54.185584] ? __pfx___split_vma+0x10/0x10 [ 54.186222] ? find_held_lock+0x2c/0x110 [ 54.186879] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.187450] ? lock_is_held_type+0x9f/0x120 [ 54.188016] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.188634] ? mtree_range_walk+0x632/0x900 [ 54.189203] ? mas_walk+0x5c7/0x7c0 [ 54.189690] do_vmi_munmap+0x1f1/0x2b0 [ 54.190256] mmap_region+0x1f9/0x2660 [ 54.190753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.191287] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.192029] ? __pfx_lock_acquire+0x10/0x10 [ 54.192566] ? __pfx_mmap_region+0x10/0x10 [ 54.193118] ? security_mmap_addr+0x7d/0xa0 [ 54.193654] ? get_unmapped_area+0x1f5/0x3f0 [ 54.194239] do_mmap+0x854/0xf00 [ 54.194681] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.195213] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.195779] ksys_mmap_pgoff+0x3af/0x500 [ 54.196309] do_syscall_64+0x3f/0x90 [ 54.196804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.197488] RIP: 0033:0x7efd6c080d82 [ 54.197966] 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 [ 54.200165] RSP: 002b:00007ffd2efbef98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.201104] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd6c080d82 [ 54.201992] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd6b4ba000 [ 54.202907] RBP: 00007efd6b4ba000 R08: 0000000000000009 R09: 0000000000001000 [ 54.203773] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf44208b20 [ 54.204673] R13: 00007ffd2efbefb0 R14: 00007ffd2efbefe0 R15: 00007ffd2efbf340 [ 54.205562] [ 54.205874] [ 54.206101] Allocated by task 213: [ 54.206533] kasan_save_stack+0x22/0x50 [ 54.207063] kasan_set_track+0x25/0x30 [ 54.207563] __kasan_slab_alloc+0x59/0x70 [ 54.208116] kmem_cache_alloc+0x16b/0x370 [ 54.208638] vm_area_dup+0x20/0x160 [ 54.209120] __split_vma+0x170/0x950 [ 54.209590] split_vma+0xc6/0x110 [ 54.210057] mprotect_fixup+0x8d2/0xb30 [ 54.210580] do_mprotect_pkey+0x87e/0xd40 [ 54.211114] __x64_sys_mprotect+0x78/0xc0 [ 54.211634] do_syscall_64+0x3f/0x90 [ 54.212126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.212791] [ 54.213031] Freed by task 213: [ 54.213431] kasan_save_stack+0x22/0x50 [ 54.213960] kasan_set_track+0x25/0x30 [ 54.214495] kasan_save_free_info+0x2b/0x50 [ 54.215050] __kasan_slab_free+0x10a/0x190 [ 54.215601] kmem_cache_free+0x10d/0x4d0 [ 54.216150] rcu_core+0x8c8/0x2860 [ 54.216608] __do_softirq+0x1b7/0x7d4 [ 54.217225] [ 54.217447] Last potentially related work creation: [ 54.218072] kasan_save_stack+0x22/0x50 [ 54.218586] __kasan_record_aux_stack+0x8e/0xa0 [ 54.219175] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.219844] remove_vma+0x139/0x170 [ 54.220300] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.220881] do_vmi_munmap+0x1f1/0x2b0 [ 54.221369] __vm_munmap+0x138/0x3a0 [ 54.221863] __x64_sys_munmap+0x59/0x80 [ 54.222384] do_syscall_64+0x3f/0x90 [ 54.222874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.223528] [ 54.223743] The buggy address belongs to the object at ffff8880094a3658 [ 54.223743] which belongs to the cache vm_area_struct of size 168 [ 54.225261] The buggy address is located 88 bytes inside of [ 54.225261] freed 168-byte region [ffff8880094a3658, ffff8880094a3700) [ 54.226724] [ 54.226967] The buggy address belongs to the physical page: [ 54.227639] page:000000003f1164bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94a3 [ 54.228746] memcg:ffff88801a133f01 [ 54.229193] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.229862] page_type: 0xffffffff() [ 54.230330] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 54.231275] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a133f01 [ 54.232209] page dumped because: kasan: bad access detected [ 54.232887] [ 54.233103] Memory state around the buggy address: [ 54.233696] ffff8880094a3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.234589] ffff8880094a3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 54.235470] >ffff8880094a3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.236334] ^ [ 54.236946] ffff8880094a3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 54.237828] ffff8880094a3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 54.238710] ================================================================== [ 54.239686] Disabling lock debugging due to kernel taint [ 56.315023] BUG: Bad rss-counter state mm:00000000cf5f28ab type:MM_FILEPAGES val:33 [ 56.316097] BUG: Bad rss-counter state mm:00000000cf5f28ab type:MM_ANONPAGES val:22 [ 56.777296] BUG: Bad rss-counter state mm:000000002b9ac754 type:MM_FILEPAGES val:33 [ 56.777846] BUG: Bad rss-counter state mm:000000002b9ac754 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44258' (ECDSA) to the list of known hosts. 2023/06/20 00:41:45 fuzzer started 2023/06/20 00:41:46 dialing manager at localhost:44161 2023/06/20 00:41:46 checking machine... 2023/06/20 00:41:46 checking revisions... [ 57.458188] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:41:46 testing simple program... [ 57.507994] cgroup: Unknown subsys name 'net' [ 57.559894] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:41:23 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff8366cd3b RDX=00000000000266cd RSI=00000000000266cd RDI=ffffffff865816f4 RBP=ffff8880164977a0 RSP=ffff8880164976d8 R8 =0000000000000000 R9 =ffff888016497788 R10=0000000000038001 R11=000000000008b5ce R12=ffff8880164977a8 R13=ffff888016497790 R14=ffff888016497789 R15=ffff888016497748 RIP=ffffffff811307c2 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 00007efc9f407900 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=00007efc9f9be618 CR3=000000001026a000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007ffc3e499fa8 CR3=000000000e62a000 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=2035343a31343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a31343a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000