syzkaller login: [ 29.077841] BUG: Bad rss-counter state mm:00000000fdf248c5 type:MM_FILEPAGES val:33 [ 29.079022] BUG: Bad rss-counter state mm:00000000fdf248c5 type:MM_ANONPAGES val:22 [ 29.238056] ================================================================== [ 29.238964] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.239912] Read of size 8 at addr ffff88800e81b6b0 by task sshd/219 [ 29.240690] [ 29.240908] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.241893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.242902] Call Trace: [ 29.243220] [ 29.243507] dump_stack_lvl+0x91/0xf0 [ 29.243995] print_report+0xcc/0x620 [ 29.244478] ? __virt_addr_valid+0x102/0x340 [ 29.245039] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.245662] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.246271] kasan_report+0xbe/0xf0 [ 29.246751] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.247384] vma_interval_tree_remove+0xc75/0xec0 [ 29.248002] vma_prepare+0xc54/0x11a0 [ 29.248492] __split_vma+0x5af/0x950 [ 29.248969] ? __pfx___split_vma+0x10/0x10 [ 29.249511] ? find_held_lock+0x2c/0x110 [ 29.250051] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.250634] ? lock_is_held_type+0x9f/0x120 [ 29.251203] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.251810] ? mtree_range_walk+0x632/0x900 [ 29.252367] ? mas_walk+0x5c7/0x7c0 [ 29.252848] do_vmi_munmap+0x1f1/0x2b0 [ 29.253339] mmap_region+0x1f9/0x2660 [ 29.253822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.254332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.255066] ? __pfx_lock_acquire+0x10/0x10 [ 29.255613] ? __pfx_mmap_region+0x10/0x10 [ 29.256143] ? security_mmap_addr+0x7d/0xa0 [ 29.256682] ? get_unmapped_area+0x1f5/0x3f0 [ 29.257236] do_mmap+0x854/0xf00 [ 29.257674] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.258166] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.258728] ksys_mmap_pgoff+0x3af/0x500 [ 29.259237] do_syscall_64+0x3f/0x90 [ 29.259723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.260367] RIP: 0033:0x7f22e8803d82 [ 29.260823] 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 [ 29.262977] RSP: 002b:00007ffc0e73f2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.263883] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22e8803d82 [ 29.264729] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22e7c3d000 [ 29.265576] RBP: 00007f22e7c3d000 R08: 0000000000000009 R09: 0000000000001000 [ 29.266420] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcebec6f70 [ 29.267283] R13: 00007ffc0e73f310 R14: 00007ffc0e73f340 R15: 00007ffc0e73f6a0 [ 29.268144] [ 29.268436] [ 29.268649] Allocated by task 212: [ 29.269082] kasan_save_stack+0x22/0x50 [ 29.269584] kasan_set_track+0x25/0x30 [ 29.270079] __kasan_slab_alloc+0x59/0x70 [ 29.270599] kmem_cache_alloc+0x16b/0x370 [ 29.271128] vm_area_dup+0x20/0x160 [ 29.271581] __split_vma+0x170/0x950 [ 29.272044] split_vma+0xc6/0x110 [ 29.272477] mprotect_fixup+0x8d2/0xb30 [ 29.272973] do_mprotect_pkey+0x87e/0xd40 [ 29.273485] __x64_sys_mprotect+0x78/0xc0 [ 29.274002] do_syscall_64+0x3f/0x90 [ 29.274473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.275134] [ 29.275350] Freed by task 212: [ 29.275736] kasan_save_stack+0x22/0x50 [ 29.276236] kasan_set_track+0x25/0x30 [ 29.276728] kasan_save_free_info+0x2b/0x50 [ 29.277254] __kasan_slab_free+0x10a/0x190 [ 29.277790] kmem_cache_free+0x10d/0x4d0 [ 29.278297] rcu_core+0x8c8/0x2860 [ 29.278737] __do_softirq+0x1b7/0x7d4 [ 29.279216] [ 29.279436] Last potentially related work creation: [ 29.280020] kasan_save_stack+0x22/0x50 [ 29.280549] __kasan_record_aux_stack+0x8e/0xa0 [ 29.281147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.281816] remove_vma+0x139/0x170 [ 29.282279] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.282854] do_vmi_munmap+0x1f1/0x2b0 [ 29.283386] __vm_munmap+0x138/0x3a0 [ 29.283876] __x64_sys_munmap+0x59/0x80 [ 29.284401] do_syscall_64+0x3f/0x90 [ 29.284907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.285579] [ 29.285801] The buggy address belongs to the object at ffff88800e81b658 [ 29.285801] which belongs to the cache vm_area_struct of size 168 [ 29.287358] The buggy address is located 88 bytes inside of [ 29.287358] freed 168-byte region [ffff88800e81b658, ffff88800e81b700) [ 29.288832] [ 29.289054] The buggy address belongs to the physical page: [ 29.289741] page:000000003c3e951b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe81b [ 29.290865] memcg:ffff88800d968a01 [ 29.291325] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.291986] page_type: 0xffffffff() [ 29.292456] raw: 0100000000000200 ffff8880087a0c80 ffffea000036b9c0 dead000000000008 [ 29.293385] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d968a01 [ 29.294297] page dumped because: kasan: bad access detected [ 29.294966] [ 29.295183] Memory state around the buggy address: [ 29.295760] ffff88800e81b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.296623] ffff88800e81b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.297485] >ffff88800e81b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.298329] ^ [ 29.298912] ffff88800e81b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.299769] ffff88800e81b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.300627] ================================================================== [ 29.302967] Disabling lock debugging due to kernel taint [ 31.267070] BUG: Bad rss-counter state mm:00000000b8b1bcd8 type:MM_FILEPAGES val:33 [ 31.268108] BUG: Bad rss-counter state mm:00000000b8b1bcd8 type:MM_ANONPAGES val:22 [ 31.828909] BUG: Bad rss-counter state mm:0000000069619540 type:MM_FILEPAGES val:33 [ 31.830058] BUG: Bad rss-counter state mm:0000000069619540 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24756' (ECDSA) to the list of known hosts. 2023/06/21 03:55:23 fuzzer started 2023/06/21 03:55:23 dialing manager at localhost:36067 2023/06/21 03:55:23 checking machine... 2023/06/21 03:55:23 checking revisions... [ 32.460340] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:55:23 testing simple program... [ 32.516569] cgroup: Unknown subsys name 'net' [ 32.567345] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:55:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa6420a2b60 CR3=000000000d6ba000 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=6fa0e5b073f43cb6444d6ad377b957a5 XMM02=000000000011b158eff9b2d0a8fce9cb XMM03=000000000011b2282c67c8bc2e329bc3 XMM04=15e840809251873100000000000ae988 XMM05=ae5587763f32c64100000000001326f0 XMM06=4fda316b135da52b0000000000131790 XMM07=e042d86d42eb936e00000000001215c0 XMM08=7c7af55a71f1c7bb000000000011b228 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff846000aa RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88801693b680 R15=ffff88806cf09a98 RIP=ffffffff8113062c 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 00007fd9e8b16900 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=00007ffc88160000 CR3=000000000f6fc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000