[ 25.805983] BUG: Bad rss-counter state mm:0000000024df4bfd type:MM_FILEPAGES val:33 [ 25.807419] BUG: Bad rss-counter state mm:0000000024df4bfd type:MM_ANONPAGES val:22 [ 25.932352] ================================================================== [ 25.933439] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.934567] Read of size 8 at addr ffff888019f95228 by task sshd/220 [ 25.935479] [ 25.935703] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.936577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.937596] Call Trace: [ 25.937912] [ 25.938219] dump_stack_lvl+0x91/0xf0 [ 25.938708] print_report+0xcc/0x620 [ 25.939197] ? __virt_addr_valid+0x102/0x340 [ 25.939757] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.940377] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.940998] kasan_report+0xbe/0xf0 [ 25.941479] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.942130] vma_interval_tree_remove+0xc75/0xec0 [ 25.942735] vma_prepare+0xc54/0x11a0 [ 25.943226] __split_vma+0x5af/0x950 [ 25.943712] ? __pfx___split_vma+0x10/0x10 [ 25.944259] ? find_held_lock+0x2c/0x110 [ 25.944790] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.945357] ? lock_is_held_type+0x9f/0x120 [ 25.945899] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.946516] ? mtree_range_walk+0x632/0x900 [ 25.947066] ? mas_walk+0x5c7/0x7c0 [ 25.947539] do_vmi_munmap+0x1f1/0x2b0 [ 25.948031] mmap_region+0x1f9/0x2660 [ 25.948513] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.949020] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.949735] ? __pfx_lock_acquire+0x10/0x10 [ 25.950273] ? __pfx_mmap_region+0x10/0x10 [ 25.950800] ? security_mmap_addr+0x7d/0xa0 [ 25.951331] ? get_unmapped_area+0x1f5/0x3f0 [ 25.951883] do_mmap+0x854/0xf00 [ 25.952329] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.952819] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.953382] ksys_mmap_pgoff+0x3af/0x500 [ 25.953890] do_syscall_64+0x3f/0x90 [ 25.954386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.955031] RIP: 0033:0x7f190fe61d82 [ 25.955484] 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 [ 25.957612] RSP: 002b:00007ffeba896958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.958527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f190fe61d82 [ 25.959373] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f190f29b000 [ 25.960212] RBP: 00007f190f29b000 R08: 0000000000000009 R09: 0000000000001000 [ 25.961049] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a4ab99d90 [ 25.961893] R13: 00007ffeba896970 R14: 00007ffeba8969a0 R15: 00007ffeba896d00 [ 25.962754] [ 25.963045] [ 25.963260] Allocated by task 213: [ 25.963685] kasan_save_stack+0x22/0x50 [ 25.964185] kasan_set_track+0x25/0x30 [ 25.964675] __kasan_slab_alloc+0x59/0x70 [ 25.965205] kmem_cache_alloc+0x16b/0x370 [ 25.965719] vm_area_dup+0x20/0x160 [ 25.966191] __split_vma+0x170/0x950 [ 25.966661] split_vma+0xc6/0x110 [ 25.967108] mprotect_fixup+0x8d2/0xb30 [ 25.967613] do_mprotect_pkey+0x87e/0xd40 [ 25.968137] __x64_sys_mprotect+0x78/0xc0 [ 25.968657] do_syscall_64+0x3f/0x90 [ 25.969138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.969778] [ 25.969992] Freed by task 213: [ 25.970391] kasan_save_stack+0x22/0x50 [ 25.970894] kasan_set_track+0x25/0x30 [ 25.971388] kasan_save_free_info+0x2b/0x50 [ 25.971918] __kasan_slab_free+0x10a/0x190 [ 25.972456] kmem_cache_free+0x10d/0x4d0 [ 25.972959] rcu_core+0x8c8/0x2860 [ 25.973402] __do_softirq+0x1b7/0x7d4 [ 25.973878] [ 25.974093] Last potentially related work creation: [ 25.974706] kasan_save_stack+0x22/0x50 [ 25.975206] __kasan_record_aux_stack+0x8e/0xa0 [ 25.975778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.976473] remove_vma+0x139/0x170 [ 25.976926] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.977479] do_vmi_munmap+0x1f1/0x2b0 [ 25.977962] __vm_munmap+0x138/0x3a0 [ 25.978442] __x64_sys_munmap+0x59/0x80 [ 25.978937] do_syscall_64+0x3f/0x90 [ 25.979406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.980047] [ 25.980260] The buggy address belongs to the object at ffff888019f951d0 [ 25.980260] which belongs to the cache vm_area_struct of size 168 [ 25.981719] The buggy address is located 88 bytes inside of [ 25.981719] freed 168-byte region [ffff888019f951d0, ffff888019f95278) [ 25.983127] [ 25.983345] The buggy address belongs to the physical page: [ 25.984010] page:00000000eaf49328 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f95 [ 25.985114] memcg:ffff88800ef2ac01 [ 25.985545] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.986215] page_type: 0xffffffff() [ 25.986673] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.987606] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef2ac01 [ 25.988532] page dumped because: kasan: bad access detected [ 25.989200] [ 25.989419] Memory state around the buggy address: [ 25.990003] ffff888019f95100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.990869] ffff888019f95180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 25.991733] >ffff888019f95200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 25.992588] ^ [ 25.993146] ffff888019f95280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.994023] ffff888019f95300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.994905] ================================================================== [ 25.995837] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.097023] BUG: Bad rss-counter state mm:00000000b6786be1 type:MM_FILEPAGES val:33 [ 28.098190] BUG: Bad rss-counter state mm:00000000b6786be1 type:MM_ANONPAGES val:22 [ 28.528975] BUG: Bad rss-counter state mm:0000000052412dae type:MM_FILEPAGES val:33 [ 28.530005] BUG: Bad rss-counter state mm:0000000052412dae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19232' (ECDSA) to the list of known hosts. 2023/06/19 12:21:41 fuzzer started 2023/06/19 12:21:42 dialing manager at localhost:44161 2023/06/19 12:21:42 checking machine... 2023/06/19 12:21:42 checking revisions... [ 29.253612] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:21:42 testing simple program... [ 29.293738] cgroup: Unknown subsys name 'net' [ 29.329590] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:21:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000010 RCX=0000000000000000 RDX=1ffff11001c49482 RSI=0000000000000025 RDI=000000000000003c RBP=ffff88800e24a400 RSP=ffff888009e6fd20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000025 R13=ffff88801975ed40 R14=1ffff110013cdfa9 R15=0000000000000001 RIP=ffffffff814c0354 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 00007f0f7ee5d900 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=00007ffe54dfb000 CR3=0000000019fec000 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=ffff888008c58400 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=00007fb9061b16c0 CR3=000000000d550000 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=f9578563265c3184f44434ea9ed76d4d XMM02=000000000011c3e8eff9b2d0a8fce9cb XMM03=000000000011c4b82c67c8bc2e329bc3 XMM04=dbf968c694a9de6a00000000000ae988 XMM05=19e9129bd510f2350000000000132a70 XMM06=acf180e97ce333f800000000001314e0 XMM07=e042d86d42eb936e0000000000123158 XMM08=b7568a872d07914d000000000011c4b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000