[ 42.894119] BUG: Bad rss-counter state mm:00000000154c63f8 type:MM_FILEPAGES val:33 [ 42.895790] BUG: Bad rss-counter state mm:00000000154c63f8 type:MM_ANONPAGES val:22 [ 43.054551] ================================================================== [ 43.055433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.056317] Read of size 8 at addr ffff88800e8eac20 by task sshd/218 [ 43.057041] [ 43.057250] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.058176] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.059098] Call Trace: [ 43.059399] [ 43.059699] dump_stack_lvl+0x91/0xf0 [ 43.060162] print_report+0xcc/0x620 [ 43.060624] ? __virt_addr_valid+0x102/0x340 [ 43.061146] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.061729] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.062315] kasan_report+0xbe/0xf0 [ 43.062771] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.063371] vma_interval_tree_remove+0xc75/0xec0 [ 43.063944] vma_prepare+0xc54/0x11a0 [ 43.064399] __split_vma+0x5af/0x950 [ 43.064852] ? __pfx___split_vma+0x10/0x10 [ 43.065348] ? find_held_lock+0x2c/0x110 [ 43.065847] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.066384] ? lock_is_held_type+0x9f/0x120 [ 43.066901] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.067472] ? mtree_range_walk+0x632/0x900 [ 43.068013] ? mas_walk+0x5c7/0x7c0 [ 43.068480] do_vmi_munmap+0x1f1/0x2b0 [ 43.068968] mmap_region+0x1f9/0x2660 [ 43.069444] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.069944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.070638] ? __pfx_lock_acquire+0x10/0x10 [ 43.071189] ? __pfx_mmap_region+0x10/0x10 [ 43.071718] ? security_mmap_addr+0x7d/0xa0 [ 43.072239] ? get_unmapped_area+0x1f5/0x3f0 [ 43.072778] do_mmap+0x854/0xf00 [ 43.073210] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.073688] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.074242] ksys_mmap_pgoff+0x3af/0x500 [ 43.074739] do_syscall_64+0x3f/0x90 [ 43.075221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.075852] RIP: 0033:0x7f4ebb30dd82 [ 43.076308] 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 [ 43.078414] RSP: 002b:00007ffca0cea938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.079309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ebb30dd82 [ 43.080141] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4eba747000 [ 43.080979] RBP: 00007f4eba747000 R08: 0000000000000009 R09: 0000000000001000 [ 43.081824] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561bfc8bcf70 [ 43.082659] R13: 00007ffca0cea950 R14: 00007ffca0cea980 R15: 00007ffca0ceace0 [ 43.083512] [ 43.083804] [ 43.084011] Allocated by task 211: [ 43.084435] kasan_save_stack+0x22/0x50 [ 43.084929] kasan_set_track+0x25/0x30 [ 43.085414] __kasan_slab_alloc+0x59/0x70 [ 43.085938] kmem_cache_alloc+0x16b/0x370 [ 43.086442] vm_area_dup+0x20/0x160 [ 43.086899] __split_vma+0x170/0x950 [ 43.087364] split_vma+0xc6/0x110 [ 43.087805] mprotect_fixup+0x8d2/0xb30 [ 43.088298] do_mprotect_pkey+0x87e/0xd40 [ 43.088806] __x64_sys_mprotect+0x78/0xc0 [ 43.089321] do_syscall_64+0x3f/0x90 [ 43.089790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.090418] [ 43.090624] Freed by task 202: [ 43.091010] kasan_save_stack+0x22/0x50 [ 43.091509] kasan_set_track+0x25/0x30 [ 43.091993] kasan_save_free_info+0x2b/0x50 [ 43.092522] __kasan_slab_free+0x10a/0x190 [ 43.093054] kmem_cache_free+0x10d/0x4d0 [ 43.093555] rcu_core+0x8c8/0x2860 [ 43.093992] __do_softirq+0x1b7/0x7d4 [ 43.094462] [ 43.094671] Last potentially related work creation: [ 43.095266] kasan_save_stack+0x22/0x50 [ 43.095760] __kasan_record_aux_stack+0x8e/0xa0 [ 43.096325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.096957] remove_vma+0x139/0x170 [ 43.097405] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.097944] do_vmi_munmap+0x1f1/0x2b0 [ 43.098423] __vm_munmap+0x138/0x3a0 [ 43.098892] __x64_sys_munmap+0x59/0x80 [ 43.099384] do_syscall_64+0x3f/0x90 [ 43.099847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.100475] [ 43.100687] The buggy address belongs to the object at ffff88800e8eabc8 [ 43.100687] which belongs to the cache vm_area_struct of size 168 [ 43.102119] The buggy address is located 88 bytes inside of [ 43.102119] freed 168-byte region [ffff88800e8eabc8, ffff88800e8eac70) [ 43.103516] [ 43.103727] The buggy address belongs to the physical page: [ 43.104377] page:00000000c19591c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8ea [ 43.105435] memcg:ffff8880096b9701 [ 43.105858] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.106481] page_type: 0xffffffff() [ 43.106928] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 43.107847] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096b9701 [ 43.108733] page dumped because: kasan: bad access detected [ 43.109382] [ 43.109592] Memory state around the buggy address: [ 43.110173] ffff88800e8eab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.111031] ffff88800e8eab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 43.111877] >ffff88800e8eac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 43.112706] ^ [ 43.113215] ffff88800e8eac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 43.114055] ffff88800e8ead00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 43.114898] ================================================================== [ 43.116015] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.897237] BUG: Bad rss-counter state mm:00000000b8cfe061 type:MM_FILEPAGES val:33 [ 44.898933] BUG: Bad rss-counter state mm:00000000b8cfe061 type:MM_ANONPAGES val:22 [ 45.430603] BUG: Bad rss-counter state mm:000000008d79a18d type:MM_FILEPAGES val:33 [ 45.431833] BUG: Bad rss-counter state mm:000000008d79a18d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57012' (ECDSA) to the list of known hosts. 2023/06/19 19:38:46 fuzzer started 2023/06/19 19:38:46 dialing manager at localhost:44161 2023/06/19 19:38:46 checking machine... 2023/06/19 19:38:46 checking revisions... [ 46.109837] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:38:46 testing simple program... [ 46.160706] cgroup: Unknown subsys name 'net' [ 46.200609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:38:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000006 RCX=0000000000000000 RDX=1ffff1100172ed10 RSI=ffffffff81f4dd80 RDI=ffff88800b976880 RBP=ffff88801420fc38 RSP=ffff88801420fa58 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800b976808 R13=ffff88801420fc3c R14=0000000000000001 R15=0000000000000007 RIP=ffffffff81f4ddab 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 00007ffae10c2900 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=00007ffc9eecb000 CR3=00000000164c8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f585d9abde0 CR3=000000000f98e000 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=2035343a38333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a38333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000