syzkaller login: [ 70.725844] BUG: Bad rss-counter state mm:00000000a188b317 type:MM_FILEPAGES val:33 [ 70.727056] BUG: Bad rss-counter state mm:00000000a188b317 type:MM_ANONPAGES val:22 [ 70.858440] ================================================================== [ 70.859515] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.860651] Read of size 8 at addr ffff88800e802228 by task sshd/219 [ 70.861662] [ 70.861901] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.862998] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.864056] Call Trace: [ 70.864404] [ 70.864702] dump_stack_lvl+0x91/0xf0 [ 70.865221] print_report+0xcc/0x620 [ 70.865732] ? __virt_addr_valid+0x102/0x340 [ 70.866313] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.866969] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.867614] kasan_report+0xbe/0xf0 [ 70.868121] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.868800] vma_interval_tree_remove+0xc75/0xec0 [ 70.869444] vma_prepare+0xc54/0x11a0 [ 70.869950] __split_vma+0x5af/0x950 [ 70.870448] ? __pfx___split_vma+0x10/0x10 [ 70.871004] ? find_held_lock+0x2c/0x110 [ 70.871608] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.872266] ? lock_is_held_type+0x9f/0x120 [ 70.872841] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.873486] ? mtree_range_walk+0x632/0x900 [ 70.874066] ? mas_walk+0x5c7/0x7c0 [ 70.874570] do_vmi_munmap+0x1f1/0x2b0 [ 70.875092] mmap_region+0x1f9/0x2660 [ 70.875603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.876144] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.876928] ? __pfx_lock_acquire+0x10/0x10 [ 70.877499] ? __pfx_mmap_region+0x10/0x10 [ 70.878065] ? security_mmap_addr+0x7d/0xa0 [ 70.878640] ? get_unmapped_area+0x1f5/0x3f0 [ 70.879223] do_mmap+0x854/0xf00 [ 70.879691] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.880226] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.880828] ksys_mmap_pgoff+0x3af/0x500 [ 70.881373] do_syscall_64+0x3f/0x90 [ 70.881882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.882564] RIP: 0033:0x7fa102308d82 [ 70.883049] 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 [ 70.885305] RSP: 002b:00007ffdaa7de208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.886259] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa102308d82 [ 70.887153] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa101742000 [ 70.888050] RBP: 00007fa101742000 R08: 0000000000000009 R09: 0000000000001000 [ 70.888971] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c32bbb980 [ 70.889871] R13: 00007ffdaa7de220 R14: 00007ffdaa7de250 R15: 00007ffdaa7de5b0 [ 70.890785] [ 70.891097] [ 70.891330] Allocated by task 212: [ 70.891787] kasan_save_stack+0x22/0x50 [ 70.892329] kasan_set_track+0x25/0x30 [ 70.892875] __kasan_slab_alloc+0x59/0x70 [ 70.893434] kmem_cache_alloc+0x16b/0x370 [ 70.893987] vm_area_dup+0x20/0x160 [ 70.894472] __split_vma+0x170/0x950 [ 70.894969] split_vma+0xc6/0x110 [ 70.895433] mprotect_fixup+0x8d2/0xb30 [ 70.895962] do_mprotect_pkey+0x87e/0xd40 [ 70.896530] __x64_sys_mprotect+0x78/0xc0 [ 70.897083] do_syscall_64+0x3f/0x90 [ 70.897586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.898261] [ 70.898491] Freed by task 203: [ 70.898906] kasan_save_stack+0x22/0x50 [ 70.899442] kasan_set_track+0x25/0x30 [ 70.899966] kasan_save_free_info+0x2b/0x50 [ 70.900559] __kasan_slab_free+0x10a/0x190 [ 70.901117] kmem_cache_free+0x10d/0x4d0 [ 70.901655] rcu_core+0x8c8/0x2860 [ 70.902127] __do_softirq+0x1b7/0x7d4 [ 70.902700] [ 70.902937] Last potentially related work creation: [ 70.903586] kasan_save_stack+0x22/0x50 [ 70.904134] __kasan_record_aux_stack+0x8e/0xa0 [ 70.904767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.905446] remove_vma+0x139/0x170 [ 70.905929] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.906524] do_vmi_munmap+0x1f1/0x2b0 [ 70.907037] __vm_munmap+0x138/0x3a0 [ 70.907532] __x64_sys_munmap+0x59/0x80 [ 70.908065] do_syscall_64+0x3f/0x90 [ 70.908570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.909251] [ 70.909481] The buggy address belongs to the object at ffff88800e8021d0 [ 70.909481] which belongs to the cache vm_area_struct of size 168 [ 70.911024] The buggy address is located 88 bytes inside of [ 70.911024] freed 168-byte region [ffff88800e8021d0, ffff88800e802278) [ 70.912517] [ 70.912744] The buggy address belongs to the physical page: [ 70.913443] page:00000000ff475fc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe802 [ 70.914585] memcg:ffff888019d59d01 [ 70.915037] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.915717] page_type: 0xffffffff() [ 70.916203] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 70.917193] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d59d01 [ 70.918166] page dumped because: kasan: bad access detected [ 70.918865] [ 70.919092] Memory state around the buggy address: [ 70.919711] ffff88800e802100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.920619] ffff88800e802180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 70.921513] >ffff88800e802200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 70.922408] ^ [ 70.922992] ffff88800e802280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 70.923897] ffff88800e802300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 70.924815] ================================================================== [ 70.925788] Disabling lock debugging due to kernel taint [ 73.019004] BUG: Bad rss-counter state mm:00000000fa036758 type:MM_FILEPAGES val:33 [ 73.020467] BUG: Bad rss-counter state mm:00000000fa036758 type:MM_ANONPAGES val:22 [ 73.513371] BUG: Bad rss-counter state mm:000000009ddc6a7c type:MM_FILEPAGES val:33 [ 73.514361] BUG: Bad rss-counter state mm:000000009ddc6a7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3965' (ECDSA) to the list of known hosts. 2023/06/19 17:06:01 fuzzer started 2023/06/19 17:06:01 dialing manager at localhost:44161 2023/06/19 17:06:01 checking machine... 2023/06/19 17:06:01 checking revisions... [ 74.323279] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:06:01 testing simple program... [ 74.374654] cgroup: Unknown subsys name 'net' [ 74.427996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:05:29 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000003 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81b2bdc0 RDI=ffff88801887fd98 RBP=ffff888019b99680 RSP=ffff88800ec27840 R8 =0000000000000005 R9 =000000000000009b R10=00000000000000a0 R11=00000000000b6996 R12=ffff88801887fd00 R13=ffff88801887fd64 R14=0000000000000020 R15=ffff888019b9940c RIP=ffffffff814c07eb 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 00007f6fda35b700 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=00007f247656b618 CR3=000000000e180000 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=2031303a36303a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a36303a3731203931 XMM08=3d656e696c646d632022656369767265 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=00007f210d32ec60 CR3=000000000d83e000 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=570a042772571093884e1c7986a036ce XMM02=0000000000122708eff9b2d0a8fce9cb XMM03=00000000001227d82c67c8bc2e329bc3 XMM04=0a7870c69520c43400000000000ae988 XMM05=c3a3f0281b50449500000000001399b0 XMM06=4fda316b135da52b00000000001386e0 XMM07=e042d86d42eb936e0000000000128c08 XMM08=23e3957979c90f5b00000000001227d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000