syzkaller login: [ 38.943064] BUG: Bad rss-counter state mm:00000000fb23c1d4 type:MM_FILEPAGES val:33 [ 38.944308] BUG: Bad rss-counter state mm:00000000fb23c1d4 type:MM_ANONPAGES val:22 [ 38.981796] ================================================================== [ 38.982853] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.983958] Read of size 8 at addr ffff88800b352d08 by task sshd/221 [ 38.984929] [ 38.985153] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.986218] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.987319] Call Trace: [ 38.987666] [ 38.988000] dump_stack_lvl+0x91/0xf0 [ 38.988597] print_report+0xcc/0x620 [ 38.989255] ? __virt_addr_valid+0x102/0x340 [ 38.989838] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.990521] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.991166] kasan_report+0xbe/0xf0 [ 38.991681] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.992303] vma_interval_tree_remove+0xc75/0xec0 [ 38.992936] vma_prepare+0xc54/0x11a0 [ 38.993445] __split_vma+0x5af/0x950 [ 38.993980] ? __pfx___split_vma+0x10/0x10 [ 38.994585] ? find_held_lock+0x2c/0x110 [ 38.995192] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.995857] ? lock_is_held_type+0x9f/0x120 [ 38.996483] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.997197] ? mtree_range_walk+0x632/0x900 [ 38.997851] ? mas_walk+0x5c7/0x7c0 [ 38.998393] do_vmi_munmap+0x1f1/0x2b0 [ 38.998952] mmap_region+0x1f9/0x2660 [ 38.999507] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.000092] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.000929] ? __pfx_lock_acquire+0x10/0x10 [ 39.001522] ? __pfx_mmap_region+0x10/0x10 [ 39.002064] ? security_mmap_addr+0x7d/0xa0 [ 39.002608] ? get_unmapped_area+0x1f5/0x3f0 [ 39.003166] do_mmap+0x854/0xf00 [ 39.003712] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.004355] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.005112] ksys_mmap_pgoff+0x3af/0x500 [ 39.005787] do_syscall_64+0x3f/0x90 [ 39.006396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.007157] RIP: 0033:0x7f18f22edd82 [ 39.007660] 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 [ 39.010150] RSP: 002b:00007ffd81bf0518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.011103] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18f22edd82 [ 39.011968] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18f1727000 [ 39.012838] RBP: 00007f18f1727000 R08: 0000000000000009 R09: 0000000000001000 [ 39.013698] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638e5d00b20 [ 39.014557] R13: 00007ffd81bf0530 R14: 00007ffd81bf0560 R15: 00007ffd81bf08c0 [ 39.015417] [ 39.015725] [ 39.015939] Allocated by task 214: [ 39.016365] kasan_save_stack+0x22/0x50 [ 39.016895] kasan_set_track+0x25/0x30 [ 39.017388] __kasan_slab_alloc+0x59/0x70 [ 39.017922] kmem_cache_alloc+0x16b/0x370 [ 39.018450] vm_area_dup+0x20/0x160 [ 39.018906] __split_vma+0x170/0x950 [ 39.019375] split_vma+0xc6/0x110 [ 39.019831] mprotect_fixup+0x8d2/0xb30 [ 39.020340] do_mprotect_pkey+0x87e/0xd40 [ 39.020899] __x64_sys_mprotect+0x78/0xc0 [ 39.021424] do_syscall_64+0x3f/0x90 [ 39.021908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.022574] [ 39.022796] Freed by task 214: [ 39.023186] kasan_save_stack+0x22/0x50 [ 39.023715] kasan_set_track+0x25/0x30 [ 39.024209] kasan_save_free_info+0x2b/0x50 [ 39.024767] __kasan_slab_free+0x10a/0x190 [ 39.025315] kmem_cache_free+0x10d/0x4d0 [ 39.025856] rcu_core+0x8c8/0x2860 [ 39.026301] __do_softirq+0x1b7/0x7d4 [ 39.026811] [ 39.027025] Last potentially related work creation: [ 39.027652] kasan_save_stack+0x22/0x50 [ 39.028158] __kasan_record_aux_stack+0x8e/0xa0 [ 39.028755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.029427] remove_vma+0x139/0x170 [ 39.029887] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.030457] do_vmi_munmap+0x1f1/0x2b0 [ 39.030954] __vm_munmap+0x138/0x3a0 [ 39.031422] __x64_sys_munmap+0x59/0x80 [ 39.031935] do_syscall_64+0x3f/0x90 [ 39.032413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.033092] [ 39.033308] Second to last potentially related work creation: [ 39.034010] kasan_save_stack+0x22/0x50 [ 39.034534] __kasan_record_aux_stack+0x8e/0xa0 [ 39.035108] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.035776] remove_vma+0x139/0x170 [ 39.036227] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.036804] do_vmi_munmap+0x1f1/0x2b0 [ 39.037288] mmap_region+0x1f9/0x2660 [ 39.037777] do_mmap+0x854/0xf00 [ 39.038209] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.038715] ksys_mmap_pgoff+0x3af/0x500 [ 39.039213] do_syscall_64+0x3f/0x90 [ 39.039705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.040352] [ 39.040584] The buggy address belongs to the object at ffff88800b352cb0 [ 39.040584] which belongs to the cache vm_area_struct of size 168 [ 39.042095] The buggy address is located 88 bytes inside of [ 39.042095] freed 168-byte region [ffff88800b352cb0, ffff88800b352d58) [ 39.043531] [ 39.043749] The buggy address belongs to the physical page: [ 39.044408] page:000000008ef6a53d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb352 [ 39.045515] memcg:ffff888018fe2b01 [ 39.045944] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.046620] page_type: 0xffffffff() [ 39.047075] raw: 0100000000000200 ffff8880087a0c80 ffffea0000631bc0 dead00000000000a [ 39.048003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fe2b01 [ 39.048941] page dumped because: kasan: bad access detected [ 39.049611] [ 39.049827] Memory state around the buggy address: [ 39.050409] ffff88800b352c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.051287] ffff88800b352c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.052281] >ffff88800b352d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.053168] ^ [ 39.053625] ffff88800b352d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.054497] ffff88800b352e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.055351] ================================================================== [ 39.056322] Disabling lock debugging due to kernel taint [ 40.732786] BUG: Bad rss-counter state mm:000000006dedc584 type:MM_FILEPAGES val:33 [ 40.733540] BUG: Bad rss-counter state mm:000000006dedc584 type:MM_ANONPAGES val:22 [ 41.181569] BUG: Bad rss-counter state mm:000000008b3d1f3d type:MM_FILEPAGES val:33 [ 41.182538] BUG: Bad rss-counter state mm:000000008b3d1f3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17394' (ECDSA) to the list of known hosts. 2023/06/21 00:11:36 fuzzer started 2023/06/21 00:11:36 dialing manager at localhost:36067 2023/06/21 00:11:36 checking machine... 2023/06/21 00:11:36 checking revisions... [ 41.833886] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:11:36 testing simple program... [ 41.867393] cgroup: Unknown subsys name 'net' [ 41.914441] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:11:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86139744 RDX=1ffff1100d9c135c RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86139748 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e08 R15=ffff88806ce09a98 RIP=ffffffff81131c60 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 00007f15072f4900 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=00007f15072b9008 CR3=0000000018ffc000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007fe429c2ce00 CR3=000000000fe0e000 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=2035333a31313a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a31313a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000