syzkaller login: [ 29.990723] BUG: Bad rss-counter state mm:000000003057e2ed type:MM_FILEPAGES val:33 [ 29.992332] BUG: Bad rss-counter state mm:000000003057e2ed type:MM_ANONPAGES val:22 [ 30.168563] ================================================================== [ 30.169616] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.170769] Read of size 8 at addr ffff88800982bed8 by task sshd/220 [ 30.171636] [ 30.171848] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.172695] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.173620] Call Trace: [ 30.173925] [ 30.174194] dump_stack_lvl+0x91/0xf0 [ 30.174674] print_report+0xcc/0x620 [ 30.175137] ? __virt_addr_valid+0x102/0x340 [ 30.175657] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.176240] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.176873] kasan_report+0xbe/0xf0 [ 30.177326] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.177910] vma_interval_tree_remove+0xc75/0xec0 [ 30.178478] vma_prepare+0xc54/0x11a0 [ 30.178959] __split_vma+0x5af/0x950 [ 30.179427] ? __pfx___split_vma+0x10/0x10 [ 30.179947] ? find_held_lock+0x2c/0x110 [ 30.180502] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.181075] ? lock_is_held_type+0x9f/0x120 [ 30.181624] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.182237] ? mtree_range_walk+0x632/0x900 [ 30.182811] ? mas_walk+0x5c7/0x7c0 [ 30.183285] do_vmi_munmap+0x1f1/0x2b0 [ 30.183790] mmap_region+0x1f9/0x2660 [ 30.184270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.184837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.185561] ? __pfx_lock_acquire+0x10/0x10 [ 30.186105] ? __pfx_mmap_region+0x10/0x10 [ 30.186644] ? security_mmap_addr+0x7d/0xa0 [ 30.187181] ? get_unmapped_area+0x1f5/0x3f0 [ 30.187739] do_mmap+0x854/0xf00 [ 30.188189] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.188738] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.189300] ksys_mmap_pgoff+0x3af/0x500 [ 30.189820] do_syscall_64+0x3f/0x90 [ 30.190304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.191001] RIP: 0033:0x7fab8442bd82 [ 30.191457] 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 [ 30.193691] RSP: 002b:00007fff90907598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.194691] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab8442bd82 [ 30.195566] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab83865000 [ 30.196446] RBP: 00007fab83865000 R08: 0000000000000009 R09: 0000000000001000 [ 30.197312] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556213d83ec0 [ 30.198186] R13: 00007fff909075b0 R14: 00007fff909075e0 R15: 00007fff90907940 [ 30.199139] [ 30.199436] [ 30.199654] Allocated by task 213: [ 30.200080] kasan_save_stack+0x22/0x50 [ 30.200589] kasan_set_track+0x25/0x30 [ 30.201079] __kasan_slab_alloc+0x59/0x70 [ 30.201602] kmem_cache_alloc+0x16b/0x370 [ 30.202113] vm_area_dup+0x20/0x160 [ 30.202631] __split_vma+0x170/0x950 [ 30.203101] split_vma+0xc6/0x110 [ 30.203546] mprotect_fixup+0x8d2/0xb30 [ 30.204053] do_mprotect_pkey+0x87e/0xd40 [ 30.204573] __x64_sys_mprotect+0x78/0xc0 [ 30.205101] do_syscall_64+0x3f/0x90 [ 30.205581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.206224] [ 30.206469] Freed by task 213: [ 30.206892] kasan_save_stack+0x22/0x50 [ 30.207402] kasan_set_track+0x25/0x30 [ 30.207901] kasan_save_free_info+0x2b/0x50 [ 30.208440] __kasan_slab_free+0x10a/0x190 [ 30.208984] kmem_cache_free+0x10d/0x4d0 [ 30.209496] rcu_core+0x8c8/0x2860 [ 30.209947] __do_softirq+0x1b7/0x7d4 [ 30.210459] [ 30.210697] Last potentially related work creation: [ 30.211294] kasan_save_stack+0x22/0x50 [ 30.211803] __kasan_record_aux_stack+0x8e/0xa0 [ 30.212384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.213050] remove_vma+0x139/0x170 [ 30.213506] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.214066] do_vmi_munmap+0x1f1/0x2b0 [ 30.214577] __vm_munmap+0x138/0x3a0 [ 30.215055] __x64_sys_munmap+0x59/0x80 [ 30.215556] do_syscall_64+0x3f/0x90 [ 30.216049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.216735] [ 30.216955] Second to last potentially related work creation: [ 30.217642] kasan_save_stack+0x22/0x50 [ 30.218149] __kasan_record_aux_stack+0x8e/0xa0 [ 30.218754] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.219404] remove_vma+0x139/0x170 [ 30.219862] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.220452] do_vmi_munmap+0x1f1/0x2b0 [ 30.220958] mmap_region+0x1f9/0x2660 [ 30.221440] do_mmap+0x854/0xf00 [ 30.221877] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.222373] ksys_mmap_pgoff+0x3af/0x500 [ 30.222914] do_syscall_64+0x3f/0x90 [ 30.223390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.224042] [ 30.224260] The buggy address belongs to the object at ffff88800982be80 [ 30.224260] which belongs to the cache vm_area_struct of size 168 [ 30.225774] The buggy address is located 88 bytes inside of [ 30.225774] freed 168-byte region [ffff88800982be80, ffff88800982bf28) [ 30.227190] [ 30.227408] The buggy address belongs to the physical page: [ 30.228065] page:0000000070e93b49 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x982b [ 30.229195] memcg:ffff888009461801 [ 30.229628] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.230281] page_type: 0xffffffff() [ 30.230748] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c8a40 0000000000000004 [ 30.231680] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009461801 [ 30.232633] page dumped because: kasan: bad access detected [ 30.233307] [ 30.233525] Memory state around the buggy address: [ 30.234113] ffff88800982bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.234999] ffff88800982be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.235867] >ffff88800982be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.236763] ^ [ 30.237499] ffff88800982bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.238365] ffff88800982bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.239237] ================================================================== [ 30.240230] Disabling lock debugging due to kernel taint [ 32.977805] BUG: Bad rss-counter state mm:0000000082d7a87a type:MM_FILEPAGES val:33 [ 32.979197] BUG: Bad rss-counter state mm:0000000082d7a87a type:MM_ANONPAGES val:22 [ 33.460910] BUG: Bad rss-counter state mm:000000005722529a type:MM_FILEPAGES val:33 [ 33.461887] BUG: Bad rss-counter state mm:000000005722529a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9814' (ECDSA) to the list of known hosts. 2023/06/20 23:42:14 fuzzer started 2023/06/20 23:42:15 dialing manager at localhost:36067 2023/06/20 23:42:15 checking machine... 2023/06/20 23:42:15 checking revisions... [ 34.180783] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:42:15 testing simple program... [ 34.230250] cgroup: Unknown subsys name 'net' [ 34.269156] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:42:14 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=00005630f4399360 RCX=00007fb0f30b2116 RDX=0000000000000014 RSI=00005630f439f890 RDI=0000000000000000 RBP=ffffffffffffffff RSP=00007fff7fcd2c38 R8 =0000000000000000 R9 =00007fff7fcf5080 R10=00000000ffffffff R11=0000000000000293 R12=0000000000000001 R13=0000000000000014 R14=0000000000000000 R15=0000000000000000 RIP=00007fb0f3038df0 RFL=00000246 [---Z-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 00007fb0f27e9900 00000000 00000000 GS =0000 0000000000000000 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=000055728e14d818 CR3=000000000d71a000 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=3e274ab1fc3a238380444ad5b39fa3de XMM02=000000000011a6a8d59e07bde36eea69 XMM03=000000000011a7d0ec2efd57dc4c00df XMM04=7de7db824dee64a400000000000ae988 XMM05=54de6509d622e19f00000000001340d8 XMM06=bb0c248104d713830000000000133180 XMM07=fb795ef6d65770560000000000122078 XMM08=2c67c8bc2e329bc3000000000011a7d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007ffc018c77a8 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=00007ff7b912a510000055e6a4fac790 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