syzkaller login: [ 40.402028] BUG: Bad rss-counter state mm:00000000a8f342c6 type:MM_FILEPAGES val:33 [ 40.403439] BUG: Bad rss-counter state mm:00000000a8f342c6 type:MM_ANONPAGES val:22 [ 40.554870] ================================================================== [ 40.555837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.556818] Read of size 8 at addr ffff888016db3b38 by task sshd/221 [ 40.557626] [ 40.557955] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.558861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.559924] Call Trace: [ 40.560263] [ 40.560563] dump_stack_lvl+0x91/0xf0 [ 40.561077] print_report+0xcc/0x620 [ 40.561589] ? __virt_addr_valid+0x102/0x340 [ 40.562179] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.562827] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.563478] kasan_report+0xbe/0xf0 [ 40.563998] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.564656] vma_interval_tree_remove+0xc75/0xec0 [ 40.565301] vma_prepare+0xc54/0x11a0 [ 40.565805] __split_vma+0x5af/0x950 [ 40.566303] ? __pfx___split_vma+0x10/0x10 [ 40.566859] ? find_held_lock+0x2c/0x110 [ 40.567407] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.568019] ? lock_is_held_type+0x9f/0x120 [ 40.568595] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.569239] ? mtree_range_walk+0x632/0x900 [ 40.569821] ? mas_walk+0x5c7/0x7c0 [ 40.570328] do_vmi_munmap+0x1f1/0x2b0 [ 40.570864] mmap_region+0x1f9/0x2660 [ 40.571376] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.571936] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.572695] ? __pfx_lock_acquire+0x10/0x10 [ 40.573255] ? __pfx_mmap_region+0x10/0x10 [ 40.573815] ? security_mmap_addr+0x7d/0xa0 [ 40.574383] ? get_unmapped_area+0x1f5/0x3f0 [ 40.574972] do_mmap+0x854/0xf00 [ 40.575433] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.575980] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.576579] ksys_mmap_pgoff+0x3af/0x500 [ 40.577124] do_syscall_64+0x3f/0x90 [ 40.577630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.578321] RIP: 0033:0x7fb9ac8e2d82 [ 40.578807] 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 [ 40.581065] RSP: 002b:00007fffc4c49c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.582040] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9ac8e2d82 [ 40.582953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9abd1c000 [ 40.583869] RBP: 00007fb9abd1c000 R08: 0000000000000009 R09: 0000000000001000 [ 40.584770] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0abcce980 [ 40.585668] R13: 00007fffc4c49c40 R14: 00007fffc4c49c70 R15: 00007fffc4c49fd0 [ 40.586587] [ 40.586900] [ 40.587127] Allocated by task 214: [ 40.587578] kasan_save_stack+0x22/0x50 [ 40.588145] kasan_set_track+0x25/0x30 [ 40.588678] __kasan_slab_alloc+0x59/0x70 [ 40.589241] kmem_cache_alloc+0x16b/0x370 [ 40.589796] vm_area_dup+0x20/0x160 [ 40.590287] __split_vma+0x170/0x950 [ 40.590785] split_vma+0xc6/0x110 [ 40.591255] mprotect_fixup+0x8d2/0xb30 [ 40.591795] do_mprotect_pkey+0x87e/0xd40 [ 40.592354] __x64_sys_mprotect+0x78/0xc0 [ 40.592910] do_syscall_64+0x3f/0x90 [ 40.593414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.594100] [ 40.594330] Freed by task 214: [ 40.594746] kasan_save_stack+0x22/0x50 [ 40.595276] kasan_set_track+0x25/0x30 [ 40.595802] kasan_save_free_info+0x2b/0x50 [ 40.596365] __kasan_slab_free+0x10a/0x190 [ 40.596929] kmem_cache_free+0x10d/0x4d0 [ 40.597473] rcu_core+0x8c8/0x2860 [ 40.597942] __do_softirq+0x1b7/0x7d4 [ 40.598450] [ 40.598683] Last potentially related work creation: [ 40.599306] kasan_save_stack+0x22/0x50 [ 40.599854] __kasan_record_aux_stack+0x8e/0xa0 [ 40.600472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.601163] remove_vma+0x139/0x170 [ 40.601649] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.602244] do_vmi_munmap+0x1f1/0x2b0 [ 40.602767] __vm_munmap+0x138/0x3a0 [ 40.603266] __x64_sys_munmap+0x59/0x80 [ 40.603801] do_syscall_64+0x3f/0x90 [ 40.604300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.604980] [ 40.605208] The buggy address belongs to the object at ffff888016db3ae0 [ 40.605208] which belongs to the cache vm_area_struct of size 168 [ 40.606779] The buggy address is located 88 bytes inside of [ 40.606779] freed 168-byte region [ffff888016db3ae0, ffff888016db3b88) [ 40.608289] [ 40.608520] The buggy address belongs to the physical page: [ 40.609222] page:00000000a837c5f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16db3 [ 40.610377] memcg:ffff88800e960801 [ 40.610831] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.611523] page_type: 0xffffffff() [ 40.612010] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.612985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e960801 [ 40.613964] page dumped because: kasan: bad access detected [ 40.614673] [ 40.614905] Memory state around the buggy address: [ 40.615517] ffff888016db3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.616439] ffff888016db3a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 40.617359] >ffff888016db3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.618282] ^ [ 40.618930] ffff888016db3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.619846] ffff888016db3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.620762] ================================================================== [ 40.621862] Disabling lock debugging due to kernel taint [ 42.672902] BUG: Bad rss-counter state mm:0000000076bc59d5 type:MM_FILEPAGES val:33 [ 42.673645] BUG: Bad rss-counter state mm:0000000076bc59d5 type:MM_ANONPAGES val:22 [ 43.097607] BUG: Bad rss-counter state mm:000000004bc1393f type:MM_FILEPAGES val:33 [ 43.098360] BUG: Bad rss-counter state mm:000000004bc1393f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23443' (ECDSA) to the list of known hosts. 2023/06/19 15:18:55 fuzzer started 2023/06/19 15:18:55 dialing manager at localhost:44161 2023/06/19 15:18:55 checking machine... 2023/06/19 15:18:55 checking revisions... [ 43.761087] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:18:55 testing simple program... [ 43.801549] cgroup: Unknown subsys name 'net' [ 43.845989] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:18:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f123680 RCX=0000000000000000 RDX=1ffff11001e2474e RSI=ffffffff814c83e7 RDI=ffff88800f123a74 RBP=00007f37aa5d26c3 RSP=ffff888016bffa18 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f37aa5d26c3 R13=0000000000000000 R14=ffff88800f123680 R15=dffffc0000000000 RIP=ffffffff8135bd17 RFL=00000217 [----APC] 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 00007f37aa0ef900 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=00007ffe6fa59000 CR3=0000000016b3a000 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=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 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=0000000000000001 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=00007feba3794010 CR3=000000000c4de000 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=4eb1e3cc64b2cda428460f9a82d45b6b XMM02=ec2efd57dc4c00df000000000011d398 XMM03=8f8972c871a72253000000000011d468 XMM04=28b48d3b8ac07cc900000000000ae988 XMM05=893718793e8d278000000000001352c8 XMM06=c291bd5c70af25b90000000000134368 XMM07=e042d86d42eb936e0000000000124c00 XMM08=8f8972c871a72253000000000011d468 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000